| Disclosure Descriptive Information |
| Label: | Income Tax Expense (Benefit) Details [Text Block] |
| Name: | IncomeTaxExpenseBenefitDetails |
| Parent Topic: | IncomeTaxes |
| Documentation: | Disclosure of the components of income tax expense attributable to continuing operations. |
| Commentary: | |
| Status: | |
| US GAAP XBRL Taxonomy Text Block: | us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock |
| Human Readable Examples: | List of human readable examples |
| Machine Readable Examples: | List of machine readable examples |
| Business rules (machine readable): | XBRL Definition Relations |
| US GAAP XBRL Taxonomy Network: | http://fasb.org/us-gaap/role/disclosure/IncomeTaxes | XML | HTML |
| References to Accounting Standards Codification (ASC) |
| Item | Description | Reference |
|---|---|---|
| 1 | FASB: Topic:740 Subtopic:10 Section:50 Paragraph:9 | http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 |
| Example Disclosure |
| Prototype of Disclosure |
| Line | Label | Object Class (Data type) | Period Type | Balance | Report Element Name |
|---|---|---|---|---|---|
| 1 | Income Tax Expense / (Benefit) | Abstract | us-gaap:IncomeTaxExpenseBenefitAbstract | ||
| 2 | Current | Abstract | us-gaap:CurrentIncomeTaxExpenseBenefitAbstract | ||
| 3 | Federal | Concept (Monetary) | For Period | Debit | us-gaap:CurrentFederalTaxExpenseBenefit |
| 4 | State | Concept (Monetary) | For Period | Debit | us-gaap:CurrentStateAndLocalTaxExpenseBenefit |
| 5 | Foreign | Concept (Monetary) | For Period | Debit | us-gaap:CurrentForeignTaxExpenseBenefit |
| 6 | Current Income Tax Expense (Benefit), Total | Concept (Monetary) | For Period | Debit | us-gaap:CurrentIncomeTaxExpenseBenefit |
| 7 | Deferred | Abstract | us-gaap:DeferredIncomeTaxExpenseBenefitAbstract | ||
| 8 | Federal | Concept (Monetary) | For Period | Debit | us-gaap:DeferredFederalIncomeTaxExpenseBenefit |
| 9 | State | Concept (Monetary) | For Period | Debit | us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit |
| 10 | Foreign | Concept (Monetary) | For Period | Debit | us-gaap:DeferredForeignIncomeTaxExpenseBenefit |
| 11 | Deferred Income Tax Expense (Benefit), Total | Concept (Monetary) | For Period | Debit | us-gaap:DeferredIncomeTaxExpenseBenefit |
| 12 | Income taxes | Concept (Monetary) | For Period | Debit | us-gaap:IncomeTaxExpenseBenefit |
| Business Rules Summary |
| From | Arcrole (predicate) | To |
|---|---|---|
| disclosures:IncomeTaxExpenseBenefitDetails | rules-arcroles:disclosure-equivalentTextblock | us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock |
| disclosures:IncomeTaxExpenseBenefitDetails | rules-arcroles:disclosure-hasConceptArrangementPattern | fro:RollUp |
| disclosures:IncomeTaxExpenseBenefitDetails | rules-arcroles:disclosure-requiresConcept | us-gaap:IncomeTaxExpenseBenefit |
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