Accounting Changes and Error Corrections Disclosure [Note Level] AccountingChangesAndErrorCorrectionsDisclosures Entire footnote of the nature and amount of prior period errors that had previously been considered immaterial and which are being corrected in the current fiscal year. AccountingChanges No commentary yet [Text Block] us-gaap:AccountingChangesAndErrorCorrectionsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/AccountingChangesAndErrorCorrections http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-acec-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-44.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-44.xml 21 Accounting Changes and Error Corrections Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounting Changes Disclosure [Note Level] AccountingChangesDisclosures Entire footnote for accounting changes. AccountingChanges No commentary yet [Text Block] us-gaap:AccountingChangesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/AccountingChangesAndErrorCorrections http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-acec-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1250.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1250.xml 9 Accounting Changes Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Payable and Accrued Liabilities [Roll Up] (Current and Noncurrent Combined) AccountsPayableAndAccruedLiabilitiesRollUp Roll up of details of combined current and noncurrent accounts payable and accrued liabilities. (For unclassified balance sheets) PayablesAccruals No commentary yet [Roll Up] us-gaap:ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-543.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-543.xml 11 Accounts Payable and Accrued Liabilities [Roll Up] (Current and Noncurrent Combined) http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Payable and Accrued Liabilities Disclosure [Note Level] AccountsPayableAndAccruedLiabilitiesDisclosure Entire footnote for accounts payable and accrued liabilities at the end of the reporting period. PayablesAccruals No commentary yet [Text Block] us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-145.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-145.xml 9 Accounts Payable and Accrued Liabilities Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Payable and Accrued Liabilities, Current [Roll Up] AccountsPayableAndAccruedLiabilitiesCurrentRollUp Roll up of details of current portion of accounts payable and accrued liabilities. PayablesAccruals No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-542.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-542.xml 78 Accounts Payable and Accrued Liabilities, Current [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Payable and Accrued Liabilities, Current, Disclosure [Note Level] AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrent Entire footnote for current accounts payable and accrued liabilities at the end of the reporting period. PayablesAccruals No commentary yet [Text Block] us-gaap:AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureCurrentTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1223.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1223.xml 18 Accounts Payable and Accrued Liabilities, Current, Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Payable and Accrued Liabilities, Noncurrent [Roll Up] AccountsPayableAndAccruedLiabilitiesNoncurrentRollUp Roll up of details of noncurrent portion of accounts payable and accrued liabilities. PayablesAccruals No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-545.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-545.xml 2 Accounts Payable and Accrued Liabilities, Noncurrent [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Payable and Accrued Liabilities, Noncurrent, Disclosure [NoteLevel] AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureNoncurrent Entire footnote for noncurrent accounts payable and accrued liabilities at the end of the reporting period. PayablesAccruals No commentary yet [Text Block] us-gaap:AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureNoncurrentTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1224.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1224.xml 4 Accounts Payable and Accrued Liabilities, Noncurrent, Disclosure [NoteLevel] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Payable and Other Accrued Liabilities, Current [Roll Up] AccountsPayableAndOtherAccruedLiabilitiesCurrentRollUp Roll up of details of current portion of accounts payable and other accrued liabilities. PayablesAccruals No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1258.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1258.xml 2 Accounts Payable and Other Accrued Liabilities, Current [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Payable, Current [Roll Up] AccountsPayableDetails Disclosure of the details of current accounts payable. PayablesAccruals No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-150.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-150.xml 3 Accounts Payable, Current [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts Receivable, Net [Roll Up] (Unclassified balance sheet) AccountsReceivableNetRollUp Roll up of details of accounts receivable, net. Receivables No commentary yet [Hierarchy] Detail http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-812.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-812.xml 21 Accounts Receivable, Net [Roll Up] (Unclassified balance sheet) http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accounts, Notes, Loans and Financing Receivable [Roll Up] AccountsNotesLoansAndFinancingReceivable Disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. US GAAP XBRL Taxonomy documentation says, Presentation is categorized by current, noncurrent and unclassified receivables. Not sure what that means. Receivables No commentary yet [Roll Up] us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-73.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-73.xml 8 Accounts, Notes, Loans and Financing Receivable [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accrued Income Taxes, Current and Noncurrent [Roll Up] AccruedIncomeTaxesRollUp Roll up of details of accrued income taxes. PayablesAccruals No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-546.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-546.xml 2 Accrued Income Taxes, Current and Noncurrent [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accrued Liabilities [Roll Up] (Unsure if combined current/noncurrent or current only) AccruedLiabilities Disclosure of the roll up of details of accrued liabilities. (Unclear if this is intended for combined current and noncurrent or should be used if an economic entity has only current accrued liabilities.) PayablesAccruals No commentary yet [Roll Up] us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-149.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-149.xml 11 Accrued Liabilities [Roll Up] (Unsure if combined current/noncurrent or current only) http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accrued Liabilities and Other Liabilities [Roll Up] AccruedLiabilitiesAndOtherLiabilities Roll up of details of accrued liabilities and other liabilities. This appears to be for an unclassified balance sheet where current and noncurrent items are not distinguished. PayablesAccruals No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/PayablesAndAccruals http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-pay-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1259.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1259.xml 36 Accrued Liabilities and Other Liabilities [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Accumulated Other Comprehensive Income (Loss) [Roll Forward] AccumulatedOtherComprehensiveIncomeLoss Disclosure of the components of accumulated other comprehensive income (loss). Equity No commentary yet [Roll Fowward] us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-225.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-225.xml 23 Accumulated Other Comprehensive Income (Loss) [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Additional Financial Information Disclosure [Note Level] AdditionalFinancialInformationDisclosure Entire footnote of additional information, including descriptions and amounts, related to primary financial statements. Organization No commentary yet [Text Block] us-gaap:AdditionalFinancialInformationDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-20.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-20.xml 14 Additional Financial Information Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Allowance for Credit Losses [Note Level] AllowanceForCreditLosses Entire footnote for allowance for credit losses. Receivables No commentary yet [Text Block] us-gaap:AllowanceForCreditLossesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-52.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-52.xml 4 Allowance for Credit Losses [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Allowance for Doubtful Accounts Receivable [Roll Forward] AllowanceForDoubtfulAccountsReceivableRollforward Roll forward (movements) in allowance for doubtful accounts Receivables No commentary yet [Roll Forward] us-gaap:AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1219.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1219.xml 24 Allowance for Doubtful Accounts Receivable [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Antidilutive Securities Excluded from Computation of Earnings Per Share [Hierarchy] AntidilutiveSecuritiesExcludedfromComputationOfEarningsPerShare Disclosure of securities that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. EarningsPerShare No commentary yet [Hierarchy] us-gaap:ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock Detail http://fasb.org/us-gaap/role/disclosure/EarningsPerShare http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-eps-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-357.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-357.xml 11 Antidilutive Securities Excluded from Computation of Earnings Per Share [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Asset Impairment Charges Disclosure [Note Level] AssetImpairmentCharges Entire footnote for the details of the charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. IntangibleAssetsGoodwillAndOther No commentary yet [Text Block] us-gaap:AssetImpairmentChargesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-126.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-126.xml 6 Asset Impairment Charges Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Asset Retirement Obligation [Roll Up] AssetRetirementObligationRollUp Roll up of details of asset retirement obligation. AssetRetirementObligations No commentary yet [Roll Up] us-gaap:ScheduleOfAssetRetirementObligationsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/AssetRetirementObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-aro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-550.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-550.xml 22 Asset Retirement Obligation [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Asset Retirement Obligation Disclosure [Note Level] AssetRetirementObligationDisclosure Entire footnote for an asset retirement obligation and the associated long-lived asset. AssetRetirementObligations No commentary yet [Text Block] us-gaap:AssetRetirementObligationDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/AssetRetirementObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-aro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-152.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-152.xml 17 Asset Retirement Obligation Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Asset Retirement Obligation, Roll Forward [Roll Forward] AssetRetirementObligationRollForwardAnalysisRollForward Roll forward of asset retirement obligation. AssetRetirementObligations No commentary yet [Roll Forward] us-gaap:ScheduleOfChangeInAssetRetirementObligationTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/AssetRetirementObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-aro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-724.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-724.xml 25 Asset Retirement Obligation, Roll Forward [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Roll Up] AvailableForsaleSecuritiesDebtMaturitiesAmortizedCostBasisRollUp Roll up of details of debt maturities of available-for-sale securities, amortized cost basis. DebtAndEquitySecurities No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/InvestmentsDebtAndEquitySecurities http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ides-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-501.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-501.xml 11 Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Balance Sheet BalanceSheet Economic entity balance sheet (statement of financial position). BalanceSheet No commentary yet [Roll Up] NoteLevel http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-stm-sfp-cls-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1.xml 38 Balance Sheet http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Balance Sheet, Parenthetical BalanceSheetParenthetical Balance sheet parenthetical information. BalanceSheet No commentary yet [Hierarchy] Detail http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-stm-sfp-cls-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-2.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-2.xml 2 Balance Sheet, Parenthetical http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Basis of Presentation and Significant Accounting Policies Disclosure [Note Level] BasisOfPresentationAndSignificantAccountingPoliciesDisclosure (Alternative) Entire footnote combining basis of presentation with significant accounting policies. Use of this is discouraged, separate basis of presentation and significant accounting policies. Organization No commentary yet [Text Block] us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/AccountingPolicies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ap-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1246.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1246.xml 13 Basis of Presentation and Significant Accounting Policies Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Basis of Reporting Disclosure [Note Level] BasisOfReporting Entire footnote of basis of reporting BasisOfReporting No commentary yet [Text Block] us-gaap:BasisOfAccounting NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1218.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1218.xml 43 Basis of Reporting Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Business Acquisition, Integration, Restructuring and Other Related Costs Disclosure [Note Level] BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCosts Entire footnote of the description for costs incurred to effect a business combination that have been expensed during the period. BusinessCombinations No commentary yet [Text Block] us-gaap:BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/BusinessCombinations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-bc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-383.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-383.xml 8 Business Acquisition, Integration, Restructuring and Other Related Costs Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Business Acquisition, Pro Forma Information [Hierarchy] BusinessAcquisitionProFormaInformation Disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. BusinessCombinations No commentary yet [Hierarchy] us-gaap:BusinessAcquisitionProFormaInformationTextBlock Detail http://fasb.org/us-gaap/role/disclosure/BusinessCombinations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-bc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-390.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-390.xml 6 Business Acquisition, Pro Forma Information [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Business Acquisitions, by Acquisition BusinessAcquisitionsByAcquisition Disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities (excludes leveraged buyouts). BusinessCombinations No commentary yet [Hierarchy] us-gaap:ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock Detail http://fasb.org/us-gaap/role/disclosure/BusinessCombinations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-bc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-389.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-389.xml 6 Business Acquisitions, by Acquisition http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Business Combination Disclosure [Note Level] BusinessCombinationDisclosure Entire footnote for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. BusinessCombinations No commentary yet [Text Block] us-gaap:BusinessCombinationDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/BusinessCombinations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-bc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-382.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-382.xml 47 Business Combination Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Business Description and Accounting Policies Disclosure [Note Level] BusinessDescriptionAndAccountingPoliciesDisclosure (Alternative) Entire footnote combining business description with significant accounting policies. Use of this is discouraged, separate basis of presentation and significant accounting policies. Organization No commentary yet [Text Block] us-gaap:BusinessDescriptionAndAccountingPoliciesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/AccountingPolicies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ap-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1247.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1247.xml 3 Business Description and Accounting Policies Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Business Description and Basis of Presentation Disclosure [Note Level] BusinessDescriptionAndBasisOfPresentationDisclosure (Alternative) Entire footnote combining business description with basis of presentation. Use of this is discouraged, separate basis of presentation and significant accounting policies. Organization No commentary yet [Text Block] us-gaap:BusinessDescriptionAndBasisOfPresentationTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/AccountingPolicies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ap-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1248.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1248.xml 7 Business Description and Basis of Presentation Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Business Insurance Recoveries Disclosure [Note Level] BusinessInsuranceRecoveriesDisclosure Entire footnote of business interruption insurance recoveries. ExtraordinaryItems No commentary yet [Text Block] us-gaap:BusinessInsuranceRecoveriesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ExtraordinaryAndUnusualItems http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-eui-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1231.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1231.xml 7 Business Insurance Recoveries Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Capital Leases in Financial Statements of Lessee Disclosure [Note Level] CapitalLeasesInFinancialStatementsOfLesseeDisclosure Entire footnote for lessee entity's capital leasing arrangements. LeasesCapital No commentary yet [Text Block] us-gaap:CapitalLeasesInFinancialStatementsOfLesseeDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-406.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-406.xml 5 Capital Leases in Financial Statements of Lessee Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Capital Leases of Lessor in Financial Statements Disclosure [Note Level] CapitalLeasesInFinancialStatementsOfLessorDisclosure Entire footnote for lessor entity's leasing arrangements. LeasesCapital No commentary yet [Text Block] us-gaap:CapitalLeasesInFinancialStatementsOfLessorDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-410.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-410.xml 4 Capital Leases of Lessor in Financial Statements Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cash and Cash Equivalents [Roll Up] CashAndCashEquivalents Disclosure of the roll up of the items which make up cash and cash equivalents. CashAndCashEquivalents No commentary yet [Roll Up] us-gaap:ScheduleOfCashAndCashEquivalentsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/CashAndCashEquivalents http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cce-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-46.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-46.xml 9 Cash and Cash Equivalents [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cash and Cash Equivalents and Short-term Investments Disclosure [Note Level] CashCashEquivalentsAndShortTermInvestments Entire footnote for cash and cash equivalent and short term investments. CashAndCashEquivalents No commentary yet [Text Block] us-gaap:CashCashEquivalentsAndShortTermInvestmentsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CashAndCashEquivalents http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cce-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1225.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1225.xml 5 Cash and Cash Equivalents and Short-term Investments Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cash and Cash Equivalents Disclosure [Note Level] CashAndCashEquivalentsDisclosure Entire footnote for cash and cash equivalents. CashAndCashEquivalents No commentary yet [Text Block] us-gaap:CashAndCashEquivalentsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CashAndCashEquivalents http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cce-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-45.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-45.xml 9 Cash and Cash Equivalents Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cash Flow Statement CashFlowStatement Economic entity cash flow statement. CashFlowStatement No commentary yet [Roll Forward] NoteLevel http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsIndirect http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-stm-scf-indir-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-12.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-12.xml 31 Cash Flow Statement http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cash Flow, Supplemental Disclosure [Note Level] CashFlowSupplementalDisclosures Entire footnote for cash flow statement supplemental disclosures. CashFlowStatement No commentary yet [Text Block] us-gaap:CashFlowSupplementalDisclosuresTextBlock NoteLevel http://fasb.org/us-gaap/role/statement/StatementOfCashFlowsSupplementalDisclosures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-stm-scf-sd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-13.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-13.xml 100 Cash Flow, Supplemental Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cash, Cash Equivalents, and Marketable Securities Disclosure [Note Level] CashCashEquivalentsAndMarketableSecuritiesDisclosure Entire footnote for cash and cash equivalent and marketable securities disclosure. CashAndCashEquivalents No commentary yet [Text Block] us-gaap:CashCashEquivalentsAndMarketableSecuritiesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CashAndCashEquivalents http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cce-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1232.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1232.xml 2 Cash, Cash Equivalents, and Marketable Securities Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Collaborative Arrangement Disclosure [Note Level] CollaborativeArrangementDisclosure Entire footnote for collaborative arrangements in which the entity is a participant. CollaborativeArrangements No commentary yet [Text Block] us-gaap:CollaborativeArrangementDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-32.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-32.xml 12 Collaborative Arrangement Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Commitments and Contingencies Disclosure [Note Level] CommitmentsAndContingenciesDisclosure Entire footnote for commitments and contingencies. Contingencies No commentary yet [Text Block] us-gaap:CommitmentsAndContingenciesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-172.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-172.xml 96 Commitments and Contingencies Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Commitments Contingencies and Guarantees Disclosure [Note Level] CommitmentsContingenciesAndGuarantees Entire footnote for commitments, contingencies, and guarantees. Contingencies No commentary yet [Text Block] us-gaap:CommitmentsContingenciesAndGuaranteesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-173.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-173.xml 10 Commitments Contingencies and Guarantees Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Commitments Disclosure [Note Level] CommitmentsDisclosure Entire footnote for significant arrangements with third parties, which includes operating lease arrangements and arrangements in which the entity has agreed to expend funds to procure goods or services, or has agreed to commit resources to supply goods or services, and operating lease arrangements. Contingencies No commentary yet [Text Block] us-gaap:CommitmentsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-174.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-174.xml 7 Commitments Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Common Stock, by Class [Hierarchy] ClassOfCommonStockHierarchy Disclosure of information about class of common stock. Equity No commentary yet [Hierarchy] Detail http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-960.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-960.xml 1 Common Stock, by Class [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Compensation and Employee Benefit Plans Disclosure [Note Level] CompensationAndEmployeeBenefitPlans Entire footnote for an entity's employee compensation and benefit plans. PostEmploymentButPreRetirementCosts No commentary yet [Text Block] us-gaap:CompensationAndEmployeeBenefitPlansTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcrb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-262.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-262.xml 37 Compensation and Employee Benefit Plans Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Compensation and Employee Benefit Plans Other than Share-based Compensation Disclosure [Note Level] CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationDisclosure Entire footnote for an entity's employee compensation and benefit plans. PostEmploymentButPreRetirementCosts No commentary yet [Text Block] us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcrb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1233.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1233.xml 4 Compensation and Employee Benefit Plans Other than Share-based Compensation Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Compensation Related Costs and Share-based Payments Disclosure [Note Level] CompensationRelatedCostsAndSharebasedPaymentsDisclosures Entire footnote for compensation-related costs for equity-based compensation. StockCompensation No commentary yet [Text Block] us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsStockCompensation http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcsbp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-290.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-290.xml 82 Compensation Related Costs and Share-based Payments Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Compensation Related Costs, General, Disclosure [Note Level] CompensationRelatedCostsGeneral Entire footnote for compensation costs. CompensationRelatedCostsGeneral No commentary yet [Text Block] us-gaap:CompensationRelatedCostsGeneralTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsGeneral http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcgen-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-259.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-259.xml 9 Compensation Related Costs, General, Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Comprehensive Income (Loss) Disclosure [Note Level] ComprehensiveIncomeLossNote Entire footnote for comprehensive income. Explains accumulated other comprehensive income. Equity No commentary yet [Text Block] us-gaap:ComprehensiveIncomeNoteTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-220.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-220.xml 200 Comprehensive Income (Loss) Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Concentration of Risk, by Risk Factor ConcentrationOfRiskByRiskFactor Disclosure of concentration risks, by risk factor. RisksUncertainties No commentary yet [Hierarchy] us-gaap:SchedulesOfConcentrationOfRiskByRiskFactorTextBlock Detail http://fasb.org/us-gaap/role/disclosure/RisksAndUncertainties http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ru-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-362.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-362.xml 22 Concentration of Risk, by Risk Factor http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Concentration Risk Disclosure [Note Level] ConcentrationRiskDisclosure Entire footnote for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. RisksUncertainties No commentary yet [Text Block] us-gaap:ConcentrationRiskDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/RisksAndUncertainties http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ru-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-363.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-363.xml 48 Concentration Risk Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Condensed Financial Statements Disclosure [Note Level] CondensedFinancialStatementsDisclosure Entire footnote of condensed financial information OtherInformation No commentary yet [Text Block] us-gaap:CondensedFinancialStatementsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1234.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1234.xml 6 Condensed Financial Statements Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Contingencies Disclosure [Note Level] ContingenciesDisclosure Entire footnote for loss and gain contingencies. Contingencies No commentary yet [Text Block] us-gaap:LossContingencyDisclosures NoteLevel http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-175.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-175.xml 2 Contingencies Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Contract Receivable Retainage [Roll Up] ContractReceivableRetainageRollUp Roll up of the details of amount billed to customers under long-term contracts or programs that have been withheld because of retainage provisions in a contract. Receivables No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-458.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-458.xml 3 Contract Receivable Retainage [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cost and Equity Method Investments Disclosure [Note Level] CostAndEquityMethodInvestmentsDisclosure Entire footnote for cost method and equity method investments included basis, impairment losses, recognized or unrecognized gains (losses). DebtAndEquitySecurities No commentary yet [Text Block] us-gaap:CostAndEquityMethodInvestmentsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InvestmentsDebtAndEquitySecurities http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ides-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-75.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-75.xml 5 Cost and Equity Method Investments Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cost-method Investments Disclosure [Note Level] CostMethodInvestmentsDescription Entire footnote for investments accounted for under the cost-method. InvestmentsOther No commentary yet [Text Block] us-gaap:CostMethodInvestmentsDescriptionTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InvestmentsAllOtherInvestments http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iaoi-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-93.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-93.xml 51 Cost-method Investments Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Cost-method Investments, Realized Gain (Loss), Excluding Other than Temporary Impairments [Roll Up] CostMethodInvestmentsRealizedGainLossExcludingOtherThanTemporaryImpairmentsRollUp Roll up of details of realized gain (loss) of cost-method investments excluding other than temporary impairments. InvestmentsOther No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/InvestmentsAllOtherInvestments http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iaoi-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-511.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-511.xml 10 Cost-method Investments, Realized Gain (Loss), Excluding Other than Temporary Impairments [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Debt [Table Text Block] Debt Disclosure of information pertaining to short-term and long-debt instruments or arrangements. Debt No commentary yet [Text Block] us-gaap:ScheduleOfDebtTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-190.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-190.xml 6 Debt [Table Text Block] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Debt and Capital Leases Disclosure [Note Level] DebtAndCapitalLeasesDisclosures Entire footnote for debt and capital lease obligations. Debt No commentary yet [Text Block] us-gaap:DebtAndCapitalLeasesDisclosuresTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-187.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-187.xml 4 Debt and Capital Leases Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Debt Disclosure [Note Level] DebtDisclosure Entire footnote for information about short-term and long-term debt arrangements. Debt No commentary yet [Text Block] us-gaap:DebtDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-186.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-186.xml 83 Debt Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Debt Instrument Redemption Disclosure [Note Level] DebtInstrumentRedemptionDisclosure Entire footnote for information debt instrument redemptions. Debt No commentary yet [Text Block] us-gaap:DebtInstrumentRedemptionTableTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1235.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1235.xml 33 Debt Instrument Redemption Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Note Level] DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosure Entire footnote of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle. DeferredCosts No commentary yet [Text Block] us-gaap:DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/DeferredCostsCapitalizedPrepaidAndOtherAssets http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dccpoa-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-109.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-109.xml 26 Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Deferred Revenue [Roll Forward] DeferredRevenueRollForward Roll forward (movement) in deferred revenue. DeferredRevenue No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/DeferredRevenue http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dr-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-727.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-727.xml 9 Deferred Revenue [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Deferred Revenue [Roll Up] DeferredRevenueRollUp Roll up of details of deferred revenue. DeferredRevenue No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/DeferredRevenue http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dr-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-554.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-554.xml 4 Deferred Revenue [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Deferred Revenue Arrangement, by Type DeferredRevenueArrangementByType Disclosure of the type of arrangements and the corresponding amounts that comprise the current and noncurrent balance of deferred revenue as of the balance sheet date. Some times this is disclosed as a roll up, other times as a roll forward. DeferredRevenue No commentary yet [Roll Up] us-gaap:DeferredRevenueByArrangementDisclosureTextBlock Detail http://fasb.org/us-gaap/role/disclosure/DeferredRevenue http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dr-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-162.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-162.xml 10 Deferred Revenue Arrangement, by Type http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Deferred Revenue Disclosure [Note Level] DeferredRevenueDisclosure Entire footnote for deferred revenues at the end of the reporting period, and description and amounts of significant changes that occurred during the reporting period. DeferredRevenue No commentary yet [Text Block] us-gaap:DeferredRevenueDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/DeferredRevenue http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dr-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-160.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-160.xml 8 Deferred Revenue Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Deferred Tax Assets and Liabilities [Roll Up] DeferredTaxAssetsAndLiabilities Disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position. IncomeTaxes No commentary yet [Roll Up] us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IncomeTaxes http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inctax-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-338.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-338.xml 30 Deferred Tax Assets and Liabilities [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Defined Benefit Plan Benefit Obligation [Roll Forward] DefinedBenefitPlanBenefitObligationRollForward Roll forward (movements) of defined benefit plan benefit obligation. PostEmploymentButPreRetirementCosts No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcrb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-737.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-737.xml 8 Defined Benefit Plan Benefit Obligation [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Defined Benefit Plans Disclosures [Note Level] DefinedBenefitPlansDisclosures Disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans. PostEmploymentButPreRetirementCosts No commentary yet [Text Block] us-gaap:ScheduleOfDefinedBenefitPlansDisclosuresTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcrb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-263.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-263.xml 138 Defined Benefit Plans Disclosures [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Derivative Disclosure [Note Level] Derivative Entire footnote of information that describes and identifies a derivative or group of derivatives on a disaggregated basis. DerivativeInstrumentsAndHedgingActivities No commentary yet [Text Block] us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/DerivativeInstrumentsAndHedgingActivities http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-diha-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1188.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1188.xml 57 Derivative Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Derivatives and Fair Value Disclosure [Note Level] DerivativesAndFairValueDisclosure Entire footnote of derivative and fair value combined. DerivativeInstrumentsAndHedgingActivities No commentary yet [Text Block] us-gaap:DerivativesAndFairValueTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/DerivativeInstrumentsAndHedgingActivities http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-diha-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1236.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1236.xml 3 Derivatives and Fair Value Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Development Stage Enterprise General Disclosure [Note Level] DevelopmentStageEnterpriseGeneralDisclosure Entire footnote for all or part of the detailed information required for development stage enterprises. DevelopmentStageEntities No commentary yet [Text Block] us-gaap:DevelopmentStageEnterpriseGeneralDisclosuresTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/DevelopingStageEnterprises http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dse-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-434.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-434.xml 136 Development Stage Enterprise General Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Disposal Groups, Including Discontinued Operations, Disclosure [Note Level] DisposalGroupsIncludingDiscontinuedOperationsDisclosure Entire footnote for the facts and circumstances leading to the completed or expected disposal. DiscontinuedOperations No commentary yet [Text Block] us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/DiscontinuedOperations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-disops-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-380.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-380.xml 174 Disposal Groups, Including Discontinued Operations, Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Dividend Payment Restrictions Disclosure [Note Level] DividendPaymentRestrictions Entire footnote of statutory restrictions on the payment of dividends as prescribed by the National Association of Insurance Commissioners or state regulatory authorities. Equity No commentary yet [Text Block] us-gaap:ScheduleOfDividendPaymentRestrictionsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-248.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-248.xml 2 Dividend Payment Restrictions Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Document and Entity Information DocumentAndEntityInformation This disclosure should NOT be used. Instead, use the DocumentInformation, EntityInformation and EntityListings disclosures. DocumentInformation No commentary yet [Hierarchy] dei:DocumentInformationTextBlock Detail http://xbrl.sec.gov/dei/role/document/DocumentInformation http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/dei-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1226.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1226.xml 30 Document and Entity Information http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Document Information DocumentInformation Information related to a submitted financial report. DocumentInformation No commentary yet [Hierarchy] dei:DocumentInformationTextBlock NoteLevel http://xbrl.sec.gov/dei/role/document/DocumentInformation http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/dei-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-436.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-436.xml 7 Document Information http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Earnings Per Share Disclosure [Note Level] EarningsPerShareDisclosures Entire footnote for earnings per share information. EarningsPerShare No commentary yet [Text Block] us-gaap:EarningsPerShareTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/EarningsPerShare http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-eps-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-350.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-350.xml 76 Earnings Per Share Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Earnings Per Share, Basic [Roll Up] EarningsPerShareBasicRollUp Roll up of earnings per share, basic. EarningsPerShare No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-652.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-652.xml 4 Earnings Per Share, Basic [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Roll Up] EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationRollUp Roll up of details of percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. IncomeTaxes No commentary yet [Roll Up] us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IncomeTaxes http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inctax-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-640.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-640.xml 89 Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Entity Information [Hierarchy] EntityInformation Information about the reporting entity. EntityInformation No commentary yet [Hierarchy] dei:EntityTextBlock NoteLevel http://xbrl.sec.gov/dei/role/document/EntityInformation http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/dei-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-437.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-437.xml 7 Entity Information [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Entity Listings [Hierarchy] EntityListings Information related to the listings on stock exchanges of the reporting entiy. EntityInformation No commentary yet [Hierarchy] Detail http://xbrl.sec.gov/dei/role/document/EntityInformation http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/dei-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-443.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-443.xml 5 Entity Listings [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Environmental Loss Contingency Disclosure [Note Level] EnvironmentalLossContingencyDisclosure Entire footnote for environmental loss contingencies, such as presence of hazardous waste, relevant information from reports issued by regulators, and estimated costs to achieve compliance with regulatory requirements. Contingencies No commentary yet [Text Block] us-gaap:EnvironmentalLossContingencyDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/EnvironmentalRemediationObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ero-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-170.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-170.xml 14 Environmental Loss Contingency Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Equity Method Investments EquityMethodInvestments Disclosure of equity method investments in common stock. EquityMethodJointVentures No commentary yet [Hierarchy] us-gaap:EquityMethodInvestmentsTextBlock Detail http://fasb.org/us-gaap/role/disclosure/InvestmentsEquityMethodAndJointVentures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-emjv-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-90.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-90.xml 8 Equity Method Investments http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Equity Method Investments Disclosure [Note Level] EquityMethodInvestmentsDisclosure Entire footnote for equity method investments and joint ventures. EquityMethodJointVentures No commentary yet [Text Block] us-gaap:EquityMethodInvestmentsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InvestmentsEquityMethodAndJointVentures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-emjv-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-91.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-91.xml 92 Equity Method Investments Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Expected Benefit Payments [Roll Up] ExpectedBenefitPayments Disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. PostEmploymentButPreRetirementCosts No commentary yet [Roll Up] us-gaap:ScheduleOfExpectedBenefitPaymentsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcrb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-283.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-283.xml 17 Expected Benefit Payments [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Extraordinary Items Disclosure [Note Level] ExtraordinaryItemsDisclosure Entire footnote of extraordinary items ExtraordinaryItems No commentary yet [Text Block] us-gaap:ExtraordinaryItemsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ExtraordinaryAndUnusualItems http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-eui-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1229.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1229.xml 11 Extraordinary Items Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Fair Value Measurement Inputs Disclosure [Note Level] FairValueMeasurementInputsDisclosure Entire footnote for the fair value inputs of financial instruments. FairValueMeasurement No commentary yet [Text Block] us-gaap:FairValueMeasurementInputsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-fifvd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1230.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1230.xml 49 Fair Value Measurement Inputs Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Fair Value Measurements Disclosure [Note Level] FairValueMeasurementsOther Entire footnote for the fair value of financial instruments. FairValueMeasurement No commentary yet [Text Block] us-gaap:FairValueDisclosuresTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-fifvd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1191.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1191.xml 57 Fair Value Measurements Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Fair Value Measurements, Recurring and Nonrecurring FairValueMeasurementsRecurringAndNonrecurring Disclosure of information about assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity that are measured at fair value on a recurring and/or nonrecurring basis in periods after initial recognition. FairValueMeasurement No commentary yet [Hierarchy] us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-fifvd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1187.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1187.xml 4 Fair Value Measurements, Recurring and Nonrecurring http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Fair Value Option Disclosure [Note Level] FairValueOptionDisclosure Entire footnote for the fair value of financial instruments, fair value option. FairValueMeasurement No commentary yet [Text Block] us-gaap:FairValueOptionTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-fifvd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1237.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1237.xml 4 Fair Value Option Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] FairValueAssetsMeasuredonRecurringBasisUnobservableInputReconciliationCalculationRollForward Disclosure of information about fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period. FairValueMeasurement No commentary yet [Roll Forward] us-gaap:FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock Detail http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-fifvd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1184.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1184.xml 10 Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Financial Instruments Disclosure [Note Level] FinancialInstrumentsDisclosure Entire footnote for financial instruments. InvestmentsOther No commentary yet [Text Block] us-gaap:FinancialInstrumentsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InvestmentsAllOtherInvestments http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iaoi-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-94.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-94.xml 15 Financial Instruments Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Financing Receivables Disclosure [Note Level] FinancingReceivables Entire footnote for financing receivables. Receivables No commentary yet [Text Block] us-gaap:FinancingReceivablesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-55.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-55.xml 13 Financing Receivables Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Foreign Currency Transaction Disclosure [Note Level] ForeignCurrencyTransactionDisclosure Entire footnote for foreign currency transactions and translation. ForeignOperationsAndCurrencyTranslation No commentary yet [Text Block] us-gaap:ForeignCurrencyDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ForeignOperationsAndCurrencyTranslation http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-foct-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-400.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-400.xml 4 Foreign Currency Transaction Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Future Minimum Payments Due under Operating Leases of Lessee [Roll Up] OperatingLeasesFutureMinimumPaymentsDueRollUp Future minimum payments due from operating leases of a lessee. LeasesOperating No commentary yet [Roll Up] us-gaap:OperatingLeasesOfLesseeDisclosureTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-691.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-691.xml 6 Future Minimum Payments Due under Operating Leases of Lessee [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Future Minimum Payments Receivable of Operating Leases of Lessor [Roll Up] OperatingLeasesFutureMinimumPaymentsReceivableRollUp Roll up of details of future minimum payments receivable from operating leases for a lessor. LeasesOperating No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-688.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-688.xml 12 Future Minimum Payments Receivable of Operating Leases of Lessor [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Future Minimum Payments, Present Value of Net Minimum Payments, Noncancelable Capital Leases, Lessor [Roll Up] CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPaymentsRollUp Roll up of details of present value of net minimum future payments for noncancelable capital leases of a lessor. LeasesCapital No commentary yet [Roll Up] us-gaap:ScheduleOfFutureMinimumLeasePaymentsForCapitalLeasesTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-680.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-680.xml 44 Future Minimum Payments, Present Value of Net Minimum Payments, Noncancelable Capital Leases, Lessor [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Future Minimum Payments, Present Value of Net Minimum Payments, Sale Leaseback Transactions [Roll Up] PresentValueOfFutureMinimumLeasePaymentsSaleLeasebackTransactionsRollUp Roll up of details of present value of future minimum lease payments from sales leaseback transactions. LeasesSaleAndLeaseback No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-695.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-695.xml 5 Future Minimum Payments, Present Value of Net Minimum Payments, Sale Leaseback Transactions [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Future Minimum Rental Payments for Operating Leases [Roll Up] FutureMinimumRentalPaymentsForOperatingLeases Disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years. LeasesOperating No commentary yet [Roll Up] us-gaap:ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-413.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-413.xml 16 Future Minimum Rental Payments for Operating Leases [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Geographic Areas, Revenue from External Customers and Long-Lived Assets, by Geographical Areas RevenuefromExternalCustomersAndLongLivedAssetsByGeographicalAreas Disclosure of information concerning material long-lived assets located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. SegmentReporting No commentary yet [Hierarchy] us-gaap:ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/SegmentReporting http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-sr-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-377.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-377.xml 11 Geographic Areas, Revenue from External Customers and Long-Lived Assets, by Geographical Areas http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Goodwill [Roll Forward] GoodwillRollForward Roll forward (movements) of goodwill. There are two approaches which can be used. One is to reconcile net goodwill. The other is to reconcile gross goodwill, and then adjust out accumulated amortization to adjust the gross amount to the net amount. Both approachs are equivalent. IntangibleAssetsGoodwillAndOther No commentary yet [Roll Forward] us-gaap:ScheduleOfGoodwillTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-723.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-723.xml 46 Goodwill [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Goodwill [Roll Up] Goodwill Disclosure of goodwill by reportable segment and in total which includes a roll forward schedule. (This seems to be the same as the disclosure GoodwillRollForward. IntangibleAssetsGoodwillAndOther No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-142.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-142.xml 25 Goodwill [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Goodwill Disclosure [Note Level] GoodwillDisclosure Entire footnote for goodwill. IntangibleAssetsGoodwillAndOther No commentary yet [Text Block] us-gaap:GoodwillDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-127.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-127.xml 9 Goodwill Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Guarantees Disclosure [Note Level] Guarantees Entire footnote for each guarantee obligation, or each group of similar guarantee obligations. Guarantees No commentary yet [Text Block] us-gaap:GuaranteesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Guarantees http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-guarantees-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-185.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-185.xml 33 Guarantees Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Impaired Assets to be Disposed of by Method Other than Sale ImpairedAssetsTobeDisposedOfByMethodOtherThanSale Disclosure for impaired assets to be disposed of by a method other than sale. PropertyPlantAndEquipment No commentary yet [Hierarchy] us-gaap:ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleTextBlock Detail http://fasb.org/us-gaap/role/disclosure/PropertyPlantAndEquipment http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ppe-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-121.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-121.xml 4 Impaired Assets to be Disposed of by Method Other than Sale http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Income before Income Tax, Domestic and Foreign [Roll Up] IncomebeforeIncomeTaxDomesticAndForeign Disclosure of income before income tax between domestic and foreign jurisdictions. IncomeTaxes No commentary yet [Roll Up] us-gaap:ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IncomeTaxes http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inctax-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-340.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-340.xml 18 Income before Income Tax, Domestic and Foreign [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Income Statement IncomeStatement Economic entity income statement. (Alternatively, could combine income statement and statement of comprehensive income.) IncomeStatement No commentary yet [Roll Up] NoteLevel http://fasb.org/us-gaap/role/statement/StatementOfIncome http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-stm-soi-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-7.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-7.xml 28 Income Statement http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Income Tax Contingency [Roll Forward] IncomeTaxContingency Disclosure of amounts of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other types of income tax contingencies, and a reconciliation of the changes in unrecognized tax benefits. IncomeTaxes No commentary yet [Roll Forward] us-gaap:SummaryOfIncomeTaxContingenciesTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IncomeTaxes http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inctax-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-347.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-347.xml 15 Income Tax Contingency [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Income Tax Disclosure [Note Level] IncomeTaxDisclosure Entire footnote for income taxes. IncomeTaxes No commentary yet [Text Block] us-gaap:IncomeTaxDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/IncomeTaxes http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inctax-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-336.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-336.xml 107 Income Tax Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Income Tax Expense (Benefit) Details [Text Block] IncomeTaxExpenseBenefitDetails Disclosure of the components of income tax expense attributable to continuing operations. IncomeTaxes No commentary yet [Roll Up] us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IncomeTaxes http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inctax-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-337.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-337.xml 28 Income Tax Expense (Benefit) Details [Text Block] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Intangible Assets and Goodwill Disclosure [Note Level] GoodwillAndIntangibleAssetsDisclosure Entire footnote for the aggregate amount of goodwill and a description of intangible assets. IntangibleAssetsGoodwillAndOther No commentary yet [Text Block] us-gaap:GoodwillAndIntangibleAssetsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-125.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-125.xml 299 Intangible Assets and Goodwill Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Intangible Assets Disclosure [Note Level] IntangibleAssetsDisclosure Entire footnote for all or part of the information related to intangible assets. IntangibleAssetsGoodwillAndOther No commentary yet [Text Block] us-gaap:IntangibleAssetsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-128.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-128.xml 18 Intangible Assets Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Intangible Assets, Finite-lived, Acquired, as Part of Business Combination FiniteLivedIntangibleAssetsAcquiredasPartOfBusinessCombination Disclosure of information about finite-lived intangible assets acquired as part of a business combination or through an asset purchase, by major class, for the period in which they were aquired. BusinessCombinations No commentary yet [Hierarchy] us-gaap:ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock Detail http://fasb.org/us-gaap/role/disclosure/BusinessCombinations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-bc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-393.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-393.xml 5 Intangible Assets, Finite-lived, Acquired, as Part of Business Combination http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Intangible Assets, Finite-lived, Estimated Useful Lives FiniteLivedIntangibleAssetsEstimatedUsefulLives Disclosure of the estimated useful lives of finite-lived intangible assets. IntangibleAssetsGoodwillAndOther No commentary yet [Hierarchy] Detail http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1269.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1269.xml 26 Intangible Assets, Finite-lived, Estimated Useful Lives http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Intangible Assets, Finite-lived, Future Amortization Expense [Roll Up] FiniteLivedIntangibleAssetsFutureAmortizationExpenseRollUp Roll up of details of future amortization expense of finite-lived intangible assets. IntangibleAssetsGoodwillAndOther No commentary yet [Roll Up] us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-537.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-537.xml 55 Intangible Assets, Finite-lived, Future Amortization Expense [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Intangible Assets, Finite-lived, Net [Roll Up] FiniteLivedIntangibleAssetsNetRollUp Roll up of details of finite-lived intangible assets, net. IntangibleAssetsGoodwillAndOther No commentary yet [Roll Up] us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-539.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-539.xml 24 Intangible Assets, Finite-lived, Net [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Intangible Assets, Indefinite-lived [Roll Forward] IndefinitelivedIntangibleAssetsRollForward Roll forward of indefinite-lived intangible assets. IntangibleAssetsGoodwillAndOther No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-722.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-722.xml 8 Intangible Assets, Indefinite-lived [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Intangible Assets, Indefinite-lived [Roll Up] IndefinitelivedIntangibleAssets Disclosure of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity, by either major class or business segment. IntangibleAssetsGoodwillAndOther No commentary yet [Roll Up] us-gaap:ScheduleOfIndefiniteLivedIntangibleAssetsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IntangibleAssetsGoodwillAndOther http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iago-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-135.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-135.xml 8 Intangible Assets, Indefinite-lived [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Interest and Other Income Disclosure [Note Level] InterestAndOtherIncome Entire footnote for interest and other income. Interest No commentary yet [Text Block] us-gaap:InterestAndOtherIncomeTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OtherExpenses http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-otherexp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-328.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-328.xml 4 Interest and Other Income Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Inventory Disclosure [Note Level] InventoryDisclosure Entire footnote for inventory. Inventory No commentary yet [Text Block] us-gaap:InventoryDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Inventory http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inv-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-105.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-105.xml 37 Inventory Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Inventory, Net (Current) [Roll Up] InventoryNetRollUp Roll up of details of current inventory, net. Inventory No commentary yet [Roll Up] us-gaap:ScheduleOfInventoryCurrentTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Inventory http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inv-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-517.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-517.xml 63 Inventory, Net (Current) [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Inventory, Noncurrent [Roll Up] InventoryNoncurrentRollUp Roll up of details of noncurrent inventory. Inventory No commentary yet [Roll Up] us-gaap:ScheduleOfInventoryNoncurrentTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Inventory http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inv-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-521.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-521.xml 26 Inventory, Noncurrent [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Investments and Other Noncurrent Assets Disclosure [Note Level] InvestmentsAndOtherNoncurrentAssets Entire footnote for investments and other noncurrent assets. InvestmentsOther No commentary yet [Text Block] us-gaap:InvestmentsAndOtherNoncurrentAssetsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InvestmentsAllOtherInvestments http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iaoi-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-95.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-95.xml 3 Investments and Other Noncurrent Assets Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Investments in Debt and Equity Instruments, Cash And Cash Equivalents, Unrealized and Realized Gains Losses Disclosure [Note Level] InvestmentsInDebtAndEquityInstrumentsCashAndCashEquivalentsUnrealizedAndRealizedGainsLosses Entire footnote for Investments in Debt and Equity Instruments, Cash And Cash Equivalents, Unrealized and Realized Gains Losses CashAndCashEquivalents No commentary yet [Text Block] us-gaap:InvestmentsInDebtAndEquityInstrumentsCashAndCashEquivalentsUnrealizedAndRealizedGainsLossesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CashAndCashEquivalents http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cce-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1251.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1251.xml 15 Investments in Debt and Equity Instruments, Cash And Cash Equivalents, Unrealized and Realized Gains Losses Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Investments in Debt and Marketable Equity Securities Disclosure [Note Level] InvestmentsInDebtAndMarketableEquitySecuritiesDisclosures Entire footnote of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. DebtAndEquitySecurities No commentary yet [Text Block] us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InvestmentsDebtAndEquitySecurities http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ides-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-74.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-74.xml 79 Investments in Debt and Marketable Equity Securities Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Leases of Lessee Disclosure [Note Level] LeasesOfLesseeDisclosure Entire footnote for lessee entity's leasing arrangements. LeasesOperating No commentary yet [Text Block] us-gaap:LeasesOfLesseeDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-405.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-405.xml 34 Leases of Lessee Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Leases of Lessor Disclosure [Note Level] LeasesOfLessorDisclosure Entire footnote for lessor entity's leasing arrangements for operating, capital and leveraged leases. LeasesOperating No commentary yet [Text Block] us-gaap:LeasesOfLessorDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-409.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-409.xml 3 Leases of Lessor Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Legal Matters and Contingencies Disclosure [Note Level] LegalMattersAndContingencies Entire footnote for legal proceedings, legal contingencies, litigation, regulatory and environmental matters and other contingencies. Contingencies No commentary yet [Text Block] us-gaap:LegalMattersAndContingenciesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-176.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-176.xml 11 Legal Matters and Contingencies Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Life Insurance, Corporate or Bank Owned, Disclosure [Note Level] LifeInsuranceCorporateOrBankOwned Entire footnote for corporate (COLI) or bank (BOLI) owned life insurance. InvestmentsOther No commentary yet [Text Block] us-gaap:LifeInsuranceCorporateOrBankOwnedTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InvestmentsAllOtherInvestments http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iaoi-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-96.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-96.xml 43 Life Insurance, Corporate or Bank Owned, Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Life Settlement Contracts Disclosure [Note Level] LifeSettlementContractsDisclosure Entire footnote for life settlement contracts. InvestmentsOther No commentary yet [Text Block] us-gaap:LifeSettlementContractsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InvestmentsAllOtherInvestments http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-iaoi-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-97.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-97.xml 6 Life Settlement Contracts Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Line of Credit Facility LineOfCreditFacility Disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements. Debt No commentary yet [Hierarchy] us-gaap:ScheduleOfLineOfCreditFacilitiesTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-198.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-198.xml 12 Line of Credit Facility http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Long-term Contracts or Programs Disclosure [Note Level] LongTermContractsOrProgramsDisclosure Entire footnote for long-term contracts or programs. ContractorsConstruction No commentary yet [Text Block] us-gaap:LongTermContractsOrProgramsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Contractors http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-con-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-433.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-433.xml 87 Long-term Contracts or Programs Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Long-term Debt Disclosure [Note Level] LongTermDebt Entire footnote for long-term debt. Debt No commentary yet [Text Block] us-gaap:LongTermDebtTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-188.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-188.xml 26 Long-term Debt Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Long-term Debt Instruments LongTermDebtInstruments Disclosure of long-debt instruments or other arrangements. Debt No commentary yet [Hierarchy] us-gaap:ScheduleOfDebtInstrumentsTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-199.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-199.xml 19 Long-term Debt Instruments http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Long-term Debt Maturities [Roll Up] LongTermDebtMaturities Disclosure of the amount of maturities for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. Debt No commentary yet [Roll Up] us-gaap:ScheduleOfMaturitiesOfLongTermDebtTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-195.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-195.xml 68 Long-term Debt Maturities [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Long-term Purchase Commitment LongTermPurchaseCommitment Disclosure of key provisions of an arrangement under which the entity has agreed to purchase goods or services over a period of time greater than one year or the normal operating cycle. Commitments No commentary yet [Hierarchy] us-gaap:LongTermPurchaseCommitmentTextBlock Detail http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-165.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-165.xml 19 Long-term Purchase Commitment http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Loss Contingency Accrual [Roll Forward] LossContingencyAccrualRollForward Roll forward (movements) of loss contingency accrual. Contingencies No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-732.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-732.xml 14 Loss Contingency Accrual [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Member Equity Disclosure [Note Level] MembersEquityNoteDisclosure Entire footnote if an economic entity reports member equity. Equity No commentary yet [Text Block] us-gaap:MembersEquityNotesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1239.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1239.xml 14 Member Equity Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Mergers, Acquisitions and Dispositions Disclosure [Note Level] MergersAcquisitionsAndDispositionsDisclosures Entire footnote for business combinations, including leverage buyout transactions, and divestitures. BusinessCombinations No commentary yet [Text Block] us-gaap:MergersAcquisitionsAndDispositionsDisclosuresTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/BusinessCombinations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-bc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-385.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-385.xml 19 Mergers, Acquisitions and Dispositions Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Mortgage Notes Payable Disclosure [Note Level] MortgageNotesPayableDisclosure Entire footnote for mortgage notes payable. Debt No commentary yet [Text Block] us-gaap:MortgageNotesPayableDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-189.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-189.xml 2 Mortgage Notes Payable Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Nature of Operations Disclosure [Note Level] NatureOfOperations Entire footnote of information about the nature of a reporting entities operations and nature of it business. Organization No commentary yet [Text Block] us-gaap:NatureOfOperations NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1213.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1213.xml 44 Nature of Operations Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Net Periodic Benefit Costs [Roll Up] NetBenefitCosts Disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. PostEmploymentButPreRetirementCosts No commentary yet [Roll Up] us-gaap:ScheduleOfNetBenefitCostsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcrb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-285.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-285.xml 17 Net Periodic Benefit Costs [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure New Accounting Pronouncements or Change in Accounting Principle [Note Level] NewAccountingPronouncementsOrChangeInAccountingPrinciple Entire footnote of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. NewAccountingPronouncements No commentary yet [Text Block] us-gaap:NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/AccountingChangesAndErrorCorrections http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-acec-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-38.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-38.xml 44 New Accounting Pronouncements or Change in Accounting Principle [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Noncontrolling Interest Disclosure [Note Level] NoncontrollingInterestDisclosure Entire footnote for noncontrolling interest in consolidated subsidiaries. DistinguishingLiabilitiesFromEquity No commentary yet [Text Block] us-gaap:MinorityInterestDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/MinorityInterest http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ni-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-214.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-214.xml 47 Noncontrolling Interest Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Nonmonetary Transactions [Hierarchy] NonmonetaryTransactions Disclosure of exchanges with other entities that involve principally nonmonetary assets or liabilities or relate to a transfer of nonmonetary assets for which the entity receives no assets in return. NonmonetaryTransactions No commentary yet [Hierarchy] us-gaap:DetailsOfNonmonetaryTransactionsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/NonmonetaryTransactions http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-nt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-421.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-421.xml 4 Nonmonetary Transactions [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Nonmonetary Transactions Disclosure [Note Level] NonmonetaryTransactionsDisclosure Entire footnote of nonmonetary transactions NonmonetaryTransactions No commentary yet [Text Block] us-gaap:NonmonetaryTransactionsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/NonmonetaryTransactions http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-nt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1227.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1227.xml 13 Nonmonetary Transactions Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Nontrade Receivables, Current [Roll Up] NontradeReceivablesCurrentRollUp Roll up of details of amounts currently receivable other than from customers. Receivables No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-465.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-465.xml 4 Nontrade Receivables, Current [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Operating Leases of Lessor Disclosure [Note Level] OperatingLeasesOfLessorDisclosure Entire footnote for operating leases of a lessor. LeasesOperating No commentary yet [Text Block] us-gaap:OperatingLeasesOfLessorDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-411.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-411.xml 3 Operating Leases of Lessor Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Option Indexed to Issuers Equity Disclosure [Note Level] OptionIndexedToIssuersEquityDescription Entire footnote for freestanding option contracts issued by an entity that are indexed to, and potentially settled in, an entity's own stock. DistinguishingLiabilitiesFromEquity No commentary yet [Text Block] us-gaap:OptionIndexedToIssuersEquityDescriptionTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OtherLiabilities http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-othliab-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-211.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-211.xml 11 Option Indexed to Issuers Equity Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Organization, Consolidation and Presentation of Financial Statements Disclosure [Note Level] OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosure Entire footnote for organization, consolidation and basis of presentation of financial statements disclosure. Use of this concept is discouraged. Rather, individual concepts should be used for disclosing each individual piece. Organization No commentary yet [Text Block] us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-19.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-19.xml 22 Organization, Consolidation and Presentation of Financial Statements Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Note Level] OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPolicies Entire footnote for the organization, consolidation and basis of presentation of financial statements disclosure, and significant accounting policies of the reporting entity. Organization No commentary yet [Text Block] us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-21.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-21.xml 6 Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Organization, Consolidation, Basis of Presentation, Business Description, and Accounting Policies Disclosure [Note Level] OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesDisclosure Entire footnote combining business description, consolidation, basis of presentation, and accounting policies. Use of this is discouraged, separate basis of presentation and significant accounting policies. Organization No commentary yet [Text Block] us-gaap:OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1249.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1249.xml 10 Organization, Consolidation, Basis of Presentation, Business Description, and Accounting Policies Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Assets [Roll Up] (Balance sheet classifications) OtherAssetsRollUp Roll up of details of other assets. DeferredCosts No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/DeferredCostsCapitalizedPrepaidAndOtherAssets http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dccpoa-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-528.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-528.xml 8 Other Assets [Roll Up] (Balance sheet classifications) http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Assets Disclosure [Note Level] OtherAssetsDisclosure Entire footnote for other assets. This disclosure includes other current assets and other noncurrent assets. DeferredCosts No commentary yet [Text Block] us-gaap:OtherAssetsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/DeferredCostsCapitalizedPrepaidAndOtherAssets http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dccpoa-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-110.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-110.xml 38 Other Assets Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Assets, Current [Roll Up] OtherCurrentAssetsRollUp Roll up of other current assets. DeferredCosts No commentary yet [Roll Up] us-gaap:ScheduleOfOtherCurrentAssetsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/DeferredCostsCapitalizedPrepaidAndOtherAssets http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dccpoa-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1253.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1253.xml 8 Other Assets, Current [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Assets, Current, Disclosure [Note Level] OtherCurrentAssetsDisclosure Entire footnote for other current assets. DeferredCosts No commentary yet [Text Block] us-gaap:OtherCurrentAssetsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/DeferredCostsCapitalizedPrepaidAndOtherAssets http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-dccpoa-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1240.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1240.xml 2 Other Assets, Current, Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Comprehensive Income, Noncontrolling Interest, Disclosure [Note Level] OtherComprehensiveIncomeNoncontrollingInterest Entire footnote for information relating to Other Comprehensive Income (OCI) as is applicable to noncontrolling interests. Equity No commentary yet [Text Block] us-gaap:OtherComprehensiveIncomeNoncontrollingInterestTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-222.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-222.xml 6 Other Comprehensive Income, Noncontrolling Interest, Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Income and Other Expense Disclosure [Note Level] OtherIncomeAndOtherExpenseDisclosure Entire footnote for other income or other expense items (both operating and nonoperating). OtherExpenses No commentary yet [Text Block] us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OtherExpenses http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-otherexp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-329.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-329.xml 108 Other Income and Other Expense Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Liabilities Disclosure [Note Level] OtherLiabilitiesDisclosure Entire footnote for other liabilities. DistinguishingLiabilitiesFromEquity No commentary yet [Text Block] us-gaap:OtherLiabilitiesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OtherLiabilities http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-othliab-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-206.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-206.xml 48 Other Liabilities Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Liabilities, Noncurrent [Hierarchy] OtherLiabilitiesNoncurrentHierarchy Disclosure of information about noncurrent other liabilities. DistinguishingLiabilitiesFromEquity No commentary yet [Roll Up] us-gaap:OtherNoncurrentLiabilitiesTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/OtherLiabilities http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-othliab-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-940.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-940.xml 6 Other Liabilities, Noncurrent [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Nonoperating Income (Expense) [Roll Up] OtherNonoperatingIncomeExpense Disclosure of the components of non-operating income or non-operating expense. OtherExpenses No commentary yet [Roll Up] us-gaap:ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/OtherExpenses http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-otherexp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-330.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-330.xml 10 Other Nonoperating Income (Expense) [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Nonoperating Income and Expense Disclosure [Note Level] OtherNonoperatingIncomeAndExpenseDisclosure Entire footnote for nonoperating income and expense. OtherExpenses No commentary yet [Text Block] us-gaap:OtherNonoperatingIncomeAndExpenseTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OtherExpenses http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-otherexp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1241.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1241.xml 3 Other Nonoperating Income and Expense Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Operating Income and Expense Disclosure [Note Level] OtherOperatingIncomeAndExpenseDisclosure Entire footnote for operating income and expense. OtherExpenses No commentary yet [Text Block] us-gaap:OtherOperatingIncomeAndExpenseTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OtherExpenses http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-otherexp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1242.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1242.xml 3 Other Operating Income and Expense Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Other Operating Income and Expense, Net [Roll Up] OtherOperatingIncomeAndExpenseRollUp Roll up of operating income and expense. OtherExpenses No commentary yet [Roll Up] us-gaap:ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock Detail http://fasb.org/us-gaap/role/disclosure/OtherExpenses http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-otherexp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1261.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1261.xml 16 Other Operating Income and Expense, Net [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Partners Capital Disclosure [Note Level] PartnersCapitalDisclosures Entire footnote for the formation, structure, control and ownership of the partnership. Equity No commentary yet [Text Block] us-gaap:PartnersCapitalNotesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-249.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-249.xml 4 Partners Capital Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Pension and Other Postretirement Benefits Disclosure [Note Level] PensionAndOtherPostretirementBenefitsDisclosure Entire footnote for pension and other postretirement benefits. PostEmploymentButPreRetirementCosts No commentary yet [Text Block] us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcrb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-261.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-261.xml 90 Pension and Other Postretirement Benefits Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Pension Plans or Other Employee Benefit Plans, Assumptions Used [Hierarchy] AssumptionsUsed Disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost. PostEmploymentButPreRetirementCosts No commentary yet [Hierarchy] us-gaap:ScheduleOfAssumptionsUsedTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcrb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-274.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-274.xml 29 Pension Plans or Other Employee Benefit Plans, Assumptions Used [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Postemployment Benefits Disclosure [Note Level] PostemploymentBenefits Entire footnote for postemployment benefits. PostretirementPensionCosts No commentary yet [Text Block] us-gaap:PostemploymentBenefitsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsPostemploymentBenefits http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcpb-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-288.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-288.xml 8 Postemployment Benefits Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Preferred Stock Disclosure [Note Level] PreferredStock Entire footnote for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock. Equity No commentary yet [Text Block] us-gaap:PreferredStockTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-223.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-223.xml 3 Preferred Stock Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Product Warranty Accrual, Extended [Roll Forward] ExtendedProductWarrantyAccrualMovementRollForward Roll forward (movements) in extended product warranty accrual. Contingencies No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-729.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-729.xml 5 Product Warranty Accrual, Extended [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Product Warranty Accrual, Standard [Roll Forward] StandardProductWarrantyAccrualMovementRollForward Roll forward (movements) of standard product warranty accrual Contingencies No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-731.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-731.xml 14 Product Warranty Accrual, Standard [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Product Warranty Disclosure [Note Level] ProductWarrantyDisclosure Entire footnote for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. Contingencies No commentary yet [Text Block] us-gaap:ProductWarrantyDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-177.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-177.xml 29 Product Warranty Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Property, Plant and Equipment [Roll Forward] PropertyPlantAndEquipmentRollForward Roll forward (movement) of property, plant, and equipment. PropertyPlantAndEquipment No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/PropertyPlantAndEquipment http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ppe-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-721.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-721.xml 1 Property, Plant and Equipment [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Property, Plant and Equipment and Intangible Assets Disclosure [Note Level] PropertyPlantAndEquipmentAndIntangibleAssetsDisclosure (Alternative) Entier disclosure for property, plant and equipment together with intangible assets. PropertyPlantAndEquipment No commentary yet [Text Block] us-gaap:PropertyPlantAndEquipmentAndIntangibleAssetsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/PropertyPlantAndEquipment http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ppe-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1243.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1243.xml 20 Property, Plant and Equipment and Intangible Assets Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Property, Plant and Equipment Disclosure [Note Level] PropertyPlantAndEquipmentDisclosure Entire footnote for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. PropertyPlantAndEquipment No commentary yet [Text Block] us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/PropertyPlantAndEquipment http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ppe-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-114.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-114.xml 64 Property, Plant and Equipment Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Property, Plant and Equipment Useful Lives PropertyPlantAndEquipmentUsefulLives Disclosure of the estimated useful lives of property, plant and equipment. AccountingPolicies No commentary yet [Hierarchy] us-gaap:PropertyPlantAndEquipmentPolicyTextBlock Detail http://fasb.org/us-gaap/role/disclosure/AccountingPolicies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ap-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-37.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-37.xml 112 Property, Plant and Equipment Useful Lives http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Property, Plant and Equipment, Net, by Type [Roll Up] PropertyPlantAndEquipmentNetByTypeRollUp Roll up of details of property, plant, and equpment, net, by type. Disclosure of physical assets used in the normal conduct of business and not intended for resale. PropertyPlantAndEquipment No commentary yet [Roll Up] us-gaap:PropertyPlantAndEquipmentTextBlock Detail http://fasb.org/us-gaap/role/disclosure/PropertyPlantAndEquipment http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ppe-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-536.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-536.xml 80 Property, Plant and Equipment, Net, by Type [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Purchase and Supply Commitment, Excluding Long-term Commitment, Disclosure [Note Level] PurchaseAndSupplyCommitmentExcludingLongTermCommitment Entire footnote for arrangements in which the entity has agreed to expend funds to procure goods or service from one or more suppliers, or to commit resources to supply goods or services to one or more customers. Contingencies No commentary yet [Text Block] us-gaap:SignificantPurchaseAndSupplyCommitmentExcludingLongtermCommitmentTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-178.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-178.xml 5 Purchase and Supply Commitment, Excluding Long-term Commitment, Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Quarterly Financial Information [Hierarchy] QuarterlyFinancialInformationDuplicate Disclosure of the quarterly financial data in the annual financial statements. InterimReporting No commentary yet [Hierarchy] us-gaap:ScheduleOfQuarterlyFinancialInformationTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/InterimReporting http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ir-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-359.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-359.xml 20 Quarterly Financial Information [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Quarterly Financial Information Disclosure [Note Level] QuarterlyFinancialInformation Entire footnote for the quarterly financial data in the annual financial statements. InterimReporting No commentary yet [Text Block] us-gaap:QuarterlyFinancialInformationTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/InterimReporting http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ir-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-358.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-358.xml 76 Quarterly Financial Information Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Receivables Disclosure (Loans, Notes, Trade, Other) [Note Level] LoansAndLeasesReceivableDisclosure Entire footnote of financing receivables and troubled debt restructurings. Receivables No commentary yet [Text Block] us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-69.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-69.xml 13 Receivables Disclosure (Loans, Notes, Trade, Other) [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Receivables Disclosures (Seems to be a duplicate) ReceivablesDisclosures Disclosure of numerious items which relate to receivables; claims held for amounts due a entity, excluding financing receivables. Receivables No commentary yet [Hierarchy] Detail http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-51.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-51.xml 12 Receivables Disclosures (Seems to be a duplicate) http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Reclassification Amount Disclosure [Note Level] ReclassificationAmountDisclosure Entire footnote for any adjustments made during the period to avoid double counting in comprehensive income items displayed as part of net income that also had been displayed as part of other comprehensive income in that period or earlier periods. Equity No commentary yet [Text Block] us-gaap:DisclosureOfReclassificationAmountTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-250.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-250.xml 4 Reclassification Amount Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Reclassifications Disclosure [Note Level] ReclassificationsDisclosure Entire footnote for reclassifications. Organization No commentary yet [Text Block] us-gaap:Reclassifications NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1244.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1244.xml 5 Reclassifications Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Related Party Disclosure [Note Level] RelatedPartyDisclosuresHierarchy Entire footnote of information about related party. RelatedPartyDisclosures No commentary yet [Text Block] us-gaap:RelatedPartyTransactionsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/RelatedPartyDisclosures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rpd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1155.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1155.xml 23 Related Party Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Related Party Transactions, by Related Party RelatedPartyTransactionsByRelatedParty Disclosure for related party transactions. RelatedPartyDisclosures No commentary yet [Hierarchy] us-gaap:ScheduleOfRelatedPartyTransactionsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/RelatedPartyDisclosures http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rpd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-423.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-423.xml 12 Related Party Transactions, by Related Party http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Reorganization under Chapter 11 of US Bankruptcy Code Disclosure [Note Level] ReorganizationunderChapter11OfUSBankruptcyCodeDisclosure Entire footnote for the description and amounts of reorganization under Chapter 11 of the US Bankruptcy Code. Reorganizations No commentary yet [Text Block] us-gaap:ReorganizationUnderChapter11OfUSBankruptcyCodeDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Reorganizations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-reorg-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-424.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-424.xml 28 Reorganization under Chapter 11 of US Bankruptcy Code Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Research, Development, and Computer Software Disclosure [Note Level] ResearchDevelopmentAndComputerSoftware Entire footnote for research, development, and computer software activities. ResearchAndDevelopmentCosts No commentary yet [Text Block] us-gaap:ResearchDevelopmentAndComputerSoftwareDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ResearchAndDevelopment http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rd-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-334.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-334.xml 2 Research, Development, and Computer Software Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Restricted Assets Disclosure [Note Level] RestrictedAssetsDisclosure Entire footnote for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. Receivables No commentary yet [Text Block] us-gaap:RestrictedAssetsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ReceivablesLoansNotesReceivableAndOthers http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-rlnro-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-54.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-54.xml 4 Restricted Assets Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Restrictions on Dividends, Loans, and Advances Disclosure [Note Level] RestrictionsonDividendsLoansAndAdvances Entire footnote for a banking or savings institution's compliance during the year with (a) federal and state laws and regulations relative to dividend restrictions and (b) federal laws and regulations relative to insider loans. Equity No commentary yet [Text Block] us-gaap:RestrictionsOnDividendsLoansAndAdvancesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-247.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-247.xml 3 Restrictions on Dividends, Loans, and Advances Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Restructuring and Related Activities Disclosure [Note Level] RestructuringAndRelatedActivitiesDisclosure Entire footnote for restructuring and related activities. ExitOrDisposalCostObligations No commentary yet [Text Block] us-gaap:RestructuringAndRelatedActivitiesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ExitOrDisposalCostObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-edco-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-155.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-155.xml 41 Restructuring and Related Activities Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Restructuring Charges [Roll Up] RestructuringChargesRollUp Roll up of details of restructuring charges. Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. ExitOrDisposalCostObligations No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/ExitOrDisposalCostObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-edco-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-552.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-552.xml 41 Restructuring Charges [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Restructuring Reserve [Roll Forward] RestructuringReserveRollForward Roll forward (movements) of restructuring reserve. ExitOrDisposalCostObligations No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/ExitOrDisposalCostObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-edco-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-725.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-725.xml 40 Restructuring Reserve [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Restructuring Reserve [Roll Up] RestructuringReserveRollUp Roll up of details of restructuring reserve. ExitOrDisposalCostObligations No commentary yet [Roll Up] Detail http://fasb.org/us-gaap/role/disclosure/ExitOrDisposalCostObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-edco-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-553.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-553.xml 1 Restructuring Reserve [Roll Up] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Restructuring, Impairment, and Other Activities Disclosure [Note Level] RestructuringImpairmentAndOtherActivitiesDisclosure Entire footnote for aggregate costs incurred during the period for restructuring, remediation, implementation, integration and asset impairment activities. ExitOrDisposalCostObligations No commentary yet [Text Block] us-gaap:RestructuringImpairmentAndOtherActivitiesDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ExitOrDisposalCostObligations http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-edco-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-156.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-156.xml 4 Restructuring, Impairment, and Other Activities Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Revenue Recognition Policy RevenueRecognitionPolicy Disclosure of revenue recognition policy AccountingPolicies No commentary yet [Text Block] us-gaap:RevenueRecognitionPolicyTextBlock Detail http://fasb.org/us-gaap/role/disclosure/AccountingPolicies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ap-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1217.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1217.xml 131 Revenue Recognition Policy http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Sale Leaseback Transaction Disclosure [Note Level] SaleLeasebackTransactionDisclosure Entire footnote for sale leaseback transactions. LeasesSaleAndLeaseback No commentary yet [Text Block] us-gaap:SaleLeasebackTransactionDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-419.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-419.xml 5 Sale Leaseback Transaction Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Sale Leaseback Transaction, Details by Transaction SaleLeasebackTransaction Disclosure of leases entered into in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller was accounted for as an operating or capital lease. LeasesSaleAndLeaseback No commentary yet [Hierarchy] us-gaap:ScheduleOfSaleLeasebackTransactionsTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Leases http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-lea-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-420.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-420.xml 19 Sale Leaseback Transaction, Details by Transaction http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Segment Reporting Disclosure [Note Level] SegmentReportingDisclosure Entire footnote for reporting segment information. SegmentReporting No commentary yet [Text Block] us-gaap:SegmentReportingDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/SegmentReporting http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-sr-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-368.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-368.xml 97 Segment Reporting Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Segment Reporting Information, by Segment SegmentReportingInformationBySegment Disclosure of the profit or loss and total assets for each reportable segment. SegmentReporting No commentary yet [Hierarchy] us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock Detail http://fasb.org/us-gaap/role/disclosure/SegmentReporting http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-sr-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-371.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-371.xml 24 Segment Reporting Information, by Segment http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Share-based Payment Award, Stock Options, Valuation Assumptions [Hierarchy] SharebasedPaymentAwardStockOptionsValuationAssumptions Disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. StockCompensation No commentary yet [Hierarchy] us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsStockCompensation http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcsbp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-314.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-314.xml 19 Share-based Payment Award, Stock Options, Valuation Assumptions [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Shareholders Equity and Share-based Payments Disclosure [Note Level] ShareholdersEquityAndSharebasedPayments Entire footnote for accounts comprising shareholders equity, comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income, and compensation-related costs for equity-based compensation. StockCompensation No commentary yet [Text Block] us-gaap:ShareholdersEquityAndShareBasedPaymentsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsStockCompensation http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-crcsbp-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-292.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-292.xml 4 Shareholders Equity and Share-based Payments Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Short-term Debt Disclosure [Note Level] ShortTermDebtDuplicate Entire footnote for short-term debt. Debt No commentary yet [Text Block] us-gaap:ShortTermDebtTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Debt http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-debt-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-191.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-191.xml 9 Short-term Debt Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Significant Accounting Policies [Note Level] SignificantAccountingPolicies Entire footnote for all significant accounting policies of the reporting entity. AccountingPolicies No commentary yet [Text Block] us-gaap:SignificantAccountingPoliciesTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/AccountingPolicies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ap-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-33.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-33.xml 68 Significant Accounting Policies [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Statement of Comprehensive Income StatementOfComprehensiveIncome Economic entity statement of comprehensive income. (Alternativly, could combine with income statement). ComprehensiveIncome No commentary yet [Roll Up] NoteLevel http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncome http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-stm-soc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-17.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-17.xml 19 Statement of Comprehensive Income http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Stock by Class StockByClass Disclosure of details of information related to each class of an entity's stock. Equity No commentary yet [Hierarchy] us-gaap:ScheduleOfStockByClassTextBlock Detail http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-233.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-233.xml 9 Stock by Class http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Stockholders Equity Disclosure [Note Level] StockholdersEquityNoteDisclosure Entire footnote for shareholders equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Equity No commentary yet [Text Block] us-gaap:StockholdersEquityNoteDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-231.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-231.xml 72 Stockholders Equity Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Subsequent Event Pro Forma Business Combinations Disclosure [Note Level] SubsequentEventProFormaBusinessCombinationsDisclosure Entire footnote for pro forma information for significant acquisitions or disposals that occurred or are probable to occur subsequent to balance sheet date. SubsequentEvents No commentary yet [Text Block] us-gaap:SubsequentEventProFormaBusinessCombinations NoteLevel http://fasb.org/us-gaap/role/disclosure/SubsequentEvents http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-se-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1245.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1245.xml 3 Subsequent Event Pro Forma Business Combinations Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Subsequent Events Disclosure [Note Level] SubsequentEvents Entire footnote for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. SubsequentEvents No commentary yet [Text Block] us-gaap:SubsequentEventsTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/SubsequentEvents http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-se-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-427.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-427.xml 36 Subsequent Events Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Supplemental Balance Sheet Disclosure [Note Level] SupplementalBalanceSheetDisclosures Entire footnote for supplemental balance sheet disclosures, including details and amounts for assets, liabilities, and equity. Organization No commentary yet [Text Block] us-gaap:SupplementalBalanceSheetDisclosuresTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-22.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-22.xml 42 Supplemental Balance Sheet Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Supply Commitment [Hierarchy] SupplyCommitment Disclosure of arrangements in which the entity has committed resources to supply goods or services to a customer. Commitments No commentary yet [Hierarchy] us-gaap:SupplyCommitmentTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/CommitmentAndContingencies http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-cc-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-164.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-164.xml 28 Supply Commitment [Hierarchy] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Treasury Stock Disclosure [Note Level] TreasuryStock Entire footnote for an entity's treasury stock. Equity No commentary yet [Text Block] us-gaap:TreasuryStockTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/Equity http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-equity-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-232.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-232.xml 9 Treasury Stock Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns, Reconcilation [Roll Forward] UnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward Roll forward (movements, changes) in unrecognized tax benefits excluding amounts pretaining to examined tax returns. IncomeTaxes No commentary yet [Roll Forward] us-gaap:ScheduleOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForwardTableTextBlock Detail http://fasb.org/us-gaap/role/disclosure/IncomeTaxes http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-inctax-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-746.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-746.xml 62 Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns, Reconcilation [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Unusual or Infrequent Item UnusualOrInfrequentItem Disclosure of the nature and financial statement effects of all material events or transactions that possesses a high degree of abnormality and are incidentally related to, the ordinary and typical activities of the entity. UnusualOrInfrequentItems No commentary yet [Hierarchy] us-gaap:ScheduleOfUnusualOrInfrequentItemsTextBlock Detail http://fasb.org/us-gaap/role/disclosure/ExtraordinaryAndUnusualItems http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-eui-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-429.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-429.xml 6 Unusual or Infrequent Item http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Unusual or Infrequent Items Disclosure [Note Level] UnusualOrInfrequentItemsDisclosure Entire footnote for any additional information related to the determination or classification of material events or transactions (that would not reasonably be expected to recur in the foreseeable future) that possesses a high degree of abnormality and are incidentally related to, the ordinary and typical activities of the entity. UnusualOrInfrequentItems No commentary yet [Text Block] us-gaap:UnusualOrInfrequentItemsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/ExtraordinaryAndUnusualItems http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-eui-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-430.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-430.xml 11 Unusual or Infrequent Items Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Valuation Allowances And Reserves Balance [Roll Forward] ValuationAllowancesAndReservesBalanceRollForward Disclosure of roll forward of total of allowances and reserves, the valuation and qualifying accounts. Organization No commentary yet [Roll Forward] Detail http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1267.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1267.xml 21 Valuation Allowances And Reserves Balance [Roll Forward] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Valuation And Qualifying Accounts Disclosure [Note Level] ValuationAndQualifyingAccountsDisclosure Entire footnote of information about variable interest entities. Organization No commentary yet [Text Block] us-gaap:ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock NoteLevel http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-1195.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-1195.xml 28 Valuation And Qualifying Accounts Disclosure [Note Level] http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure Variable Interest Entities VariableInterestEntities Disclosure of qualitative and quantitative information related to variable interests the entity holds, whether or not such variable interest entity is or is not included in the reporting entity's consolidated financial statements. PrinciplesOfConsolidation No commentary yet [Hierarchy] us-gaap:ScheduleOfVariableInterestEntitiesTextBlock Detail http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements http://www.xbrlsite.com/2014/us-GAAP-2014-AsReleased/us-gaap-dis-ocpfs-pre-2014-01-31_ModelStructure.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Prototypes/Prototype-23.xml http://www.xbrlsite.com/2014/US-GAAP/Disclosures/Exemplars/Disclosure-23.xml 9 Variable Interest Entities http://www.xbrlsite.com/2014/Protototype/fro/fro.xsd#fro_Disclosure