This work is licensed under a Creative Commons License.
| Line | From Concept | Relationship Type | To Concept |
|---|---|---|---|
| 1 | fro:Level2TextBlock | class-subClass | us-gaap:AdvertisingBarterTransactionsPolicy |
| 2 | fro:Level2TextBlock | class-subClass | us-gaap:AdvertisingCostPolicyExpensedAdvertisingCost |
| 3 | fro:Level2TextBlock | class-subClass | us-gaap:AdvertisingCostsPolicyTextBlock |
| 4 | fro:Level2TextBlock | class-subClass | us-gaap:AdvertisingCostsPolicyCapitalizedDirectResponseAdvertising |
| 5 | fro:Level2TextBlock | class-subClass | us-gaap:CooperativeInventoryPolicyPolicyTextBlock |
| 6 | fro:Level2TextBlock | class-subClass | us-gaap:AgriculturePolicyPolicyTextBlock |
| 7 | fro:Level2TextBlock | class-subClass | us-gaap:AllocationsToPolicyholdersPolicies |
| 8 | fro:Level2TextBlock | class-subClass | us-gaap:AllowanceForFundsUsedDuringConstructionPolicy |
| 9 | fro:Level2TextBlock | class-subClass | us-gaap:AnticipatedInvestmentIncomeAsComponentOfPremiumDeficiencyOnShortDurationContractsPolicy |
| 10 | fro:Level2TextBlock | class-subClass | us-gaap:AssetRetirementObligationsAndEnvironmentalCostPolicyTextBlock |
| 11 | fro:Level2TextBlock | class-subClass | us-gaap:AssetRetirementObligationsPolicy |
| 12 | fro:Level2TextBlock | class-subClass | us-gaap:InterestsContinuedToBeHeldByTransferorInFinancialAssetsThatItHasSecuritizedOrServicingAssetsOrLiabilitiesPolicy |
| 13 | fro:Level2TextBlock | class-subClass | us-gaap:BasisOfAccountingPolicyPolicyTextBlock |
| 14 | fro:Level2TextBlock | class-subClass | us-gaap:BusinessCombinationsPolicy |
| 15 | fro:Level2TextBlock | class-subClass | us-gaap:BusinessCombinationsAndOtherPurchaseOfBusinessTransactionsPolicyTextBlock |
| 16 | fro:Level2TextBlock | class-subClass | us-gaap:CapitalizationAndAmortizationOfFuelCostsPolicy |
| 17 | fro:Level2TextBlock | class-subClass | us-gaap:CapitalizationOfInternalCostsPolicy |
| 18 | fro:Level2TextBlock | class-subClass | us-gaap:CashAndCashEquivalentsPolicyTextBlock |
| 19 | fro:Level2TextBlock | class-subClass | us-gaap:CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy |
| 20 | fro:Level2TextBlock | class-subClass | us-gaap:CashAndCashEquivalentsUnrestrictedCashAndCashEquivalentsPolicy |
| 21 | fro:Level2TextBlock | class-subClass | us-gaap:CertainLoansAndDebtSecuritiesAcquiredInTransferRecognizingInterestIncomeOnImpairedLoansPolicy |
| 22 | fro:Level2TextBlock | class-subClass | us-gaap:CharityCareDisclosureTextBlock |
| 23 | fro:Level2TextBlock | class-subClass | us-gaap:ClosedBlockAccountingPolicy |
| 24 | fro:Level2TextBlock | class-subClass | us-gaap:CollaborativeArrangementAccountingPolicy |
| 25 | fro:Level2TextBlock | class-subClass | us-gaap:PurchaseTransactionPolicy |
| 26 | fro:Level2TextBlock | class-subClass | us-gaap:CommissionsExpensePolicyPolicyTextBlock |
| 27 | fro:Level2TextBlock | class-subClass | us-gaap:CommissionsPolicy |
| 28 | fro:Level2TextBlock | class-subClass | us-gaap:CommitmentsAndContingenciesPolicyTextBlock |
| 29 | fro:Level2TextBlock | class-subClass | us-gaap:ComparabilityOfPriorYearFinancialData |
| 30 | fro:Level2TextBlock | class-subClass | us-gaap:CompensatedAbsencesPolicy |
| 31 | fro:Level2TextBlock | class-subClass | us-gaap:CompensationRelatedCostsPolicyTextBlock |
| 32 | fro:Level2TextBlock | class-subClass | us-gaap:ComprehensiveIncomePolicyPolicyTextBlock |
| 33 | fro:Level2TextBlock | class-subClass | us-gaap:ConcentrationRiskCreditRisk |
| 34 | fro:Level2TextBlock | class-subClass | us-gaap:ConsolidationPolicyTextBlock |
| 35 | fro:Level2TextBlock | class-subClass | us-gaap:ConsolidationSubsidiariesOrOtherInvestmentsConsolidatedEntitiesPolicy |
| 36 | fro:Level2TextBlock | class-subClass | us-gaap:ConsolidationSubsidiaryStockIssuancesPolicy |
| 37 | fro:Level2TextBlock | class-subClass | us-gaap:ConsolidationVariableInterestEntityPolicy |
| 38 | fro:Level2TextBlock | class-subClass | us-gaap:ConstructionContractorsMethodOfReportingAffiliatedEntitiesPolicyPolicyTextBlock |
| 39 | fro:Level2TextBlock | class-subClass | us-gaap:ConstructionContractorsOperatingCyclePolicyPolicyTextBlock |
| 40 | fro:Level2TextBlock | class-subClass | us-gaap:ConstructionContractorsPolicyPolicyTextBlock |
| 41 | fro:Level2TextBlock | class-subClass | us-gaap:ContingentLiabilityReserveEstimatePolicy |
| 42 | fro:Level2TextBlock | class-subClass | us-gaap:ContinuingCareRetirementCommunitiesAdvanceFeesPolicyPolicyTextBlock |
| 43 | fro:Level2TextBlock | class-subClass | us-gaap:ContinuingCareRetirementCommunitiesObligationsPolicyPolicyTextBlock |
| 44 | fro:Level2TextBlock | class-subClass | us-gaap:ContractualAdjustmentsAndThirdPartySettlementsPolicyPolicyTextBlock |
| 45 | fro:Level2TextBlock | class-subClass | us-gaap:CooperativeAdvertisingPolicy |
| 46 | fro:Level2TextBlock | class-subClass | us-gaap:CostMethodInvestmentsPolicy |
| 47 | fro:Level2TextBlock | class-subClass | us-gaap:CostOfSalesPolicyTextBlock |
| 48 | fro:Level2TextBlock | class-subClass | us-gaap:CostOfSalesVendorAllowancesPolicy |
| 49 | fro:Level2TextBlock | class-subClass | us-gaap:CostsAssociatedWithExitOrDisposalActivitiesOrRestructuringsPolicyTextBlock |
| 50 | fro:Level2TextBlock | class-subClass | us-gaap:CostsAssociatedWithExitOrDisposalActivitiesOrRestructuringsPolicyOngoingBenefitArrangements |
| 51 | fro:Level2TextBlock | class-subClass | us-gaap:CostsIncurredPolicy |
| 52 | fro:Level2TextBlock | class-subClass | us-gaap:CreditCardOriginationCostsPolicyTextBlock |
| 53 | fro:Level2TextBlock | class-subClass | us-gaap:DebtPolicyTextBlock |
| 54 | fro:Level2TextBlock | class-subClass | us-gaap:DeferredChargesPolicyTextBlock |
| 55 | fro:Level2TextBlock | class-subClass | us-gaap:CapitalizationOfDeferredPolicyAcquisitionCostsPolicy |
| 56 | fro:Level2TextBlock | class-subClass | us-gaap:DepositContractsPolicy |
| 57 | fro:Level2TextBlock | class-subClass | us-gaap:DepreciationDepletionAndAmortizationPolicyTextBlock |
| 58 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesEmbeddedDerivatives |
| 59 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesHedgeDiscontinuances |
| 60 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesHedgeDiscontinuancesAnticipatedTransactions |
| 61 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesHedgeDiscontinuancesTerminationOfHedgingInstrumentOrHedgedItem |
| 62 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesMethodsOfAccountingNonhedgingDerivatives |
| 63 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesMethodsOfAccountingHedgeDocumentation |
| 64 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesMethodsOfAccountingHedgeEffectiveness |
| 65 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesMethodsOfAccountingHedgingDerivatives |
| 66 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesOffsettingFairValueAmountsPolicy |
| 67 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesPolicyTextBlock |
| 68 | fro:Level2TextBlock | class-subClass | us-gaap:DerivativesReportingOfDerivativeActivity |
| 69 | fro:Level2TextBlock | class-subClass | us-gaap:DeterioratedLoansTransferredInPolicy |
| 70 | fro:Level2TextBlock | class-subClass | us-gaap:DisallowedCostsForRecentlyCompletedPlantPolicy |
| 71 | fro:Level2TextBlock | class-subClass | us-gaap:DiscontinuedOperationsPolicyTextBlock |
| 72 | fro:Level2TextBlock | class-subClass | us-gaap:EarningsPerSharePolicyTextBlock |
| 73 | fro:Level2TextBlock | class-subClass | us-gaap:EmissionCreditsOrAllowancesPolicy |
| 74 | fro:Level2TextBlock | class-subClass | us-gaap:EmployeeStockOwnershipPlanESOPPolicy |
| 75 | fro:Level2TextBlock | class-subClass | us-gaap:EntertainmentEntitiesPolicyPolicyTextBlock |
| 76 | fro:Level2TextBlock | class-subClass | us-gaap:EnvironmentalCostExpensePolicy |
| 77 | fro:Level2TextBlock | class-subClass | us-gaap:EnvironmentalCostsCapitalizationPolicy |
| 78 | fro:Level2TextBlock | class-subClass | us-gaap:EnvironmentalCostsPolicy |
| 79 | fro:Level2TextBlock | class-subClass | us-gaap:EquityMethodInvestmentsIssuancesPolicy |
| 80 | fro:Level2TextBlock | class-subClass | us-gaap:EquityMethodInvestmentsPolicy |
| 81 | fro:Level2TextBlock | class-subClass | us-gaap:EquityAndCostMethodInvestmentsPolicy |
| 82 | fro:Level2TextBlock | class-subClass | us-gaap:ExchangeFeesPolicy |
| 83 | fro:Level2TextBlock | class-subClass | us-gaap:ExchangeMembershipContributedPolicy |
| 84 | fro:Level2TextBlock | class-subClass | us-gaap:ExchangeMembershipWithRightToConductBusinessPolicy |
| 85 | fro:Level2TextBlock | class-subClass | us-gaap:ExchangeMembershipWithRightsOfOwnershipAndToConductBusinessPolicy |
| 86 | fro:Level2TextBlock | class-subClass | us-gaap:ExchangeMembershipsPolicy |
| 87 | fro:Level2TextBlock | class-subClass | us-gaap:ExploitationCostsPolicyPolicyTextBlock |
| 88 | fro:Level2TextBlock | class-subClass | us-gaap:ExploratoryDrillingCostsCapitalizationAndImpairmentPolicy |
| 89 | fro:Level2TextBlock | class-subClass | us-gaap:ExtendedProductWarrantyPolicy |
| 90 | fro:Level2TextBlock | class-subClass | us-gaap:FairValueMeasurementPolicyPolicyTextBlock |
| 91 | fro:Level2TextBlock | class-subClass | us-gaap:FairValueTransferPolicyPolicyTextBlock |
| 92 | fro:Level2TextBlock | class-subClass | us-gaap:FairValueOfFinancialInstrumentsPolicy |
| 93 | fro:Level2TextBlock | class-subClass | us-gaap:FilmCostsPolicyPolicyTextBlock |
| 94 | fro:Level2TextBlock | class-subClass | us-gaap:FilmsRevenueRecognitionPolicyPolicyTextBlock |
| 95 | fro:Level2TextBlock | class-subClass | us-gaap:FinanceLoanAndLeaseReceivablesHeldForInvestmentsForeclosedAssetsPolicy |
| 96 | fro:Level2TextBlock | class-subClass | us-gaap:FinanceLoanAndLeaseReceivablesHeldForInvestmentAllowanceAndNonperformingLoansAllowancePolicy |
| 97 | fro:Level2TextBlock | class-subClass | us-gaap:FinanceLoanAndLeaseReceivablesHeldForInvestmentAllowanceAndNonperformingLoansNonperformingLoansPolicy |
| 98 | fro:Level2TextBlock | class-subClass | us-gaap:FinanceLoanAndLeaseReceivablesHeldForInvestmentAllowanceAndNonperformingLoansPolicy |
| 99 | fro:Level2TextBlock | class-subClass | us-gaap:FinanceLoanAndLeaseReceivablesHeldForInvestmentPolicy |
| 100 | fro:Level2TextBlock | class-subClass | us-gaap:FinanceLoanAndLeaseReceivablesHeldForSalePolicy |
| 101 | fro:Level2TextBlock | class-subClass | us-gaap:FinanceLoansAndLeasesReceivablePolicy |
| 102 | fro:Level2TextBlock | class-subClass | us-gaap:FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts |
| 103 | fro:Level2TextBlock | class-subClass | us-gaap:FinancingReceivableAllowanceForCreditLossesPolicyOrMethodologyChangePolicyTextBlock |
| 104 | fro:Level2TextBlock | class-subClass | us-gaap:FiscalPeriod |
| 105 | fro:Level2TextBlock | class-subClass | us-gaap:FloorBrokeragePolicy |
| 106 | fro:Level2TextBlock | class-subClass | us-gaap:ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock |
| 107 | fro:Level2TextBlock | class-subClass | us-gaap:FrequentFlierProgramPolicyPolicyTextBlock |
| 108 | fro:Level2TextBlock | class-subClass | us-gaap:FullCostMethodUsingGrossRevenueMethodPolicy |
| 109 | fro:Level2TextBlock | class-subClass | us-gaap:FullCostOrSuccessfulEffortsPolicy |
| 110 | fro:Level2TextBlock | class-subClass | us-gaap:FuturePolicyBenefitsLiabilityPolicy |
| 111 | fro:Level2TextBlock | class-subClass | us-gaap:GasBalancingArrangementsPolicy |
| 112 | fro:Level2TextBlock | class-subClass | us-gaap:GasBalancingPolicyPolicyTextBlock |
| 113 | fro:Level2TextBlock | class-subClass | us-gaap:GoodwillAndIntangibleAssetsGoodwillPolicy |
| 114 | fro:Level2TextBlock | class-subClass | us-gaap:GoodwillAndIntangibleAssetsIntangibleAssetsIndefiniteLivedPolicy |
| 115 | fro:Level2TextBlock | class-subClass | us-gaap:GoodwillAndIntangibleAssetsIntangibleAssetsPolicy |
| 116 | fro:Level2TextBlock | class-subClass | us-gaap:GoodwillAndIntangibleAssetsPolicyTextBlock |
| 117 | fro:Level2TextBlock | class-subClass | us-gaap:GovernmentContractorsCombiningAndSegmentingPolicyPolicyTextBlock |
| 118 | fro:Level2TextBlock | class-subClass | us-gaap:GovernmentContractorsCompletedContractPolicyPolicyTextBlock |
| 119 | fro:Level2TextBlock | class-subClass | us-gaap:GovernmentContractorsContractsInProgressPolicyPolicyTextBlock |
| 120 | fro:Level2TextBlock | class-subClass | us-gaap:GovernmentContractorsInventoryPolicyPolicyTextBlock |
| 121 | fro:Level2TextBlock | class-subClass | us-gaap:GovernmentContractorsPolicyPolicyTextBlock |
| 122 | fro:Level2TextBlock | class-subClass | us-gaap:GovernmentContractorsRevenueRecognitionPolicyPolicyTextBlock |
| 123 | fro:Level2TextBlock | class-subClass | us-gaap:GovernmentContractorsSubcontractAndSpecialEquipmentCostPolicyPolicyTextBlock |
| 124 | fro:Level2TextBlock | class-subClass | us-gaap:GrandfatheredESOPExpenseRecognitionPolicy |
| 125 | fro:Level2TextBlock | class-subClass | us-gaap:GuaranteesIndemnificationsAndWarrantiesPolicies |
| 126 | fro:Level2TextBlock | class-subClass | us-gaap:HealthCareCostsPolicyPolicyTextBlock |
| 127 | fro:Level2TextBlock | class-subClass | us-gaap:HealthCareEntitiesPolicyPolicyTextBlock |
| 128 | fro:Level2TextBlock | class-subClass | us-gaap:HealthCareOrganizationBadDebtsPolicyPolicyTextBlock |
| 129 | fro:Level2TextBlock | class-subClass | us-gaap:HealthCareOrganizationRevenueRecognizedPolicyPolicyTextBlock |
| 130 | fro:Level2TextBlock | class-subClass | us-gaap:ImpairedFinancingReceivablePolicyPolicyTextBlock |
| 131 | fro:Level2TextBlock | class-subClass | us-gaap:ImpairmentOrDisposalOfLongLivedAssetsIncludingIntangibleAssetsPolicyPolicyTextBlock |
| 132 | fro:Level2TextBlock | class-subClass | us-gaap:ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock |
| 133 | fro:Level2TextBlock | class-subClass | us-gaap:InProcessResearchAndDevelopmentPolicy |
| 134 | fro:Level2TextBlock | class-subClass | us-gaap:IncentiveDistributionPolicyManagingMemberOrGeneralPartnerDescription |
| 135 | fro:Level2TextBlock | class-subClass | us-gaap:IncomeTaxUncertaintiesPolicy |
| 136 | fro:Level2TextBlock | class-subClass | us-gaap:IncomeTaxPolicyTextBlock |
| 137 | fro:Level2TextBlock | class-subClass | us-gaap:IndustrySpecificPoliciesBrokerDealerTextBlock |
| 138 | fro:Level2TextBlock | class-subClass | us-gaap:IndustrySpecificPoliciesInsuranceCompaniesTextBlock |
| 139 | fro:Level2TextBlock | class-subClass | us-gaap:IndustrySpecificPoliciesOilAndGasTextBlock |
| 140 | fro:Level2TextBlock | class-subClass | us-gaap:InsurancePremiumsRevenueRecognitionPolicy |
| 141 | fro:Level2TextBlock | class-subClass | us-gaap:IntangibleAssetsArisingFromInsuranceContractsAcquiredInBusinessCombinationPolicyPolicyTextBlock |
| 142 | fro:Level2TextBlock | class-subClass | us-gaap:IntangibleAssetsFiniteLivedPolicyCostsIncurredToRenewOrExtend |
| 143 | fro:Level2TextBlock | class-subClass | us-gaap:IntangibleAssetsFiniteLivedPolicy |
| 144 | fro:Level2TextBlock | class-subClass | us-gaap:IntercompanyProfitToRegulatedAffiliatesPolicy |
| 145 | fro:Level2TextBlock | class-subClass | us-gaap:InterestCapitalizationPolicyPolicyTextBlock |
| 146 | fro:Level2TextBlock | class-subClass | us-gaap:InterestCostForPlantConstructionUsingIntermediaryPolicy |
| 147 | fro:Level2TextBlock | class-subClass | us-gaap:InterestExpenseAllocatedToDiscontinuedOperationsPolicy |
| 148 | fro:Level2TextBlock | class-subClass | us-gaap:InterestExpenseOnPrepetitionLiabilitiesPolicy |
| 149 | fro:Level2TextBlock | class-subClass | us-gaap:InterestExpensePolicyTextBlock |
| 150 | fro:Level2TextBlock | class-subClass | us-gaap:InterestInUnincorporatedJointVenturesOrPartnershipsPolicy |
| 151 | fro:Level2TextBlock | class-subClass | us-gaap:InternalReplacementsOfInsuranceContractsPolicy |
| 152 | fro:Level2TextBlock | class-subClass | us-gaap:InternalUseSoftwarePolicy |
| 153 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryInventoryConsignedToOthersPolicy |
| 154 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryCostsForContractsOrProgramsPolicy |
| 155 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryFinishedGoodsPolicy |
| 156 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryImpairmentPolicy |
| 157 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryMarkdownsPolicy |
| 158 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryRawMaterialsPolicy |
| 159 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryShrinkagePolicy |
| 160 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryStatedAboveCostPolicy |
| 161 | fro:Level2TextBlock | class-subClass | us-gaap:InventorySuppliesPolicy |
| 162 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryWorkInProcessPolicy |
| 163 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryCashFlowPolicy |
| 164 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryInterestCapitalizationPolicy |
| 165 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryMajorClassesPolicy |
| 166 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryPolicyTextBlock |
| 167 | fro:Level2TextBlock | class-subClass | us-gaap:InventoryRealEstatePolicy |
| 168 | fro:Level2TextBlock | class-subClass | us-gaap:InvestmentBankingFeesPolicy |
| 169 | fro:Level2TextBlock | class-subClass | us-gaap:InvestmentPolicyTextBlock |
| 170 | fro:Level2TextBlock | class-subClass | us-gaap:LandUnderOptionArrangementsPolicy |
| 171 | fro:Level2TextBlock | class-subClass | us-gaap:LeasePolicyTextBlock |
| 172 | fro:Level2TextBlock | class-subClass | us-gaap:LegalCostsPolicyTextBlock |
| 173 | fro:Level2TextBlock | class-subClass | us-gaap:LiabilityReserveEstimatePolicy |
| 174 | fro:Level2TextBlock | class-subClass | us-gaap:LifeSettlementContractsPolicy |
| 175 | fro:Level2TextBlock | class-subClass | us-gaap:LoanCommitmentsPolicy |
| 176 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableAllowanceForLoanLossesPolicy |
| 177 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableLeaseFinancingPolicy |
| 178 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableMortgageBankingActivitiesPolicy |
| 179 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableNonaccrualLoanAndLeaseStatusPolicy |
| 180 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableNonmortgageLoanValuationPolicy |
| 181 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy |
| 182 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableOriginationFeesDiscountsOrPremiumsAndDirectCostsToAcquireLoansPolicy |
| 183 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivablePastDueStatusPolicy |
| 184 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivablePrepaymentEstimateAssumptionsPolicy |
| 185 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy |
| 186 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableTroubledDebtRestructuringPolicy |
| 187 | fro:Level2TextBlock | class-subClass | us-gaap:LoansAndLeasesReceivableValuationPolicy |
| 188 | fro:Level2TextBlock | class-subClass | us-gaap:LongDurationContractsRevenueRecognitionPolicy |
| 189 | fro:Level2TextBlock | class-subClass | us-gaap:LongDurationContractsPolicy |
| 190 | fro:Level2TextBlock | class-subClass | us-gaap:MaintenanceCostPolicyPolicyTextBlock |
| 191 | fro:Level2TextBlock | class-subClass | us-gaap:MajorCustomersPolicyPolicyTextBlock |
| 192 | fro:Level2TextBlock | class-subClass | us-gaap:MalpracticeLossContingencyPolicy |
| 193 | fro:Level2TextBlock | class-subClass | us-gaap:ManagementAndInvestmentAdvisoryFeesPolicy |
| 194 | fro:Level2TextBlock | class-subClass | us-gaap:MarketableSecuritiesAvailableForSaleSecuritiesPolicy |
| 195 | fro:Level2TextBlock | class-subClass | us-gaap:MarketableSecuritiesHeldToMaturitySecuritiesPolicy |
| 196 | fro:Level2TextBlock | class-subClass | us-gaap:MarketableSecuritiesPolicy |
| 197 | fro:Level2TextBlock | class-subClass | us-gaap:MarketableSecuritiesTradingSecuritiesPolicy |
| 198 | fro:Level2TextBlock | class-subClass | us-gaap:MemberOfGroupFilingConsolidatedReturnPolicy |
| 199 | fro:Level2TextBlock | class-subClass | us-gaap:MinimumGuaranteesPolicy |
| 200 | fro:Level2TextBlock | class-subClass | us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock |
| 201 | fro:Level2TextBlock | class-subClass | us-gaap:OffBalanceSheetCreditExposurePolicyPolicyTextBlock |
| 202 | fro:Level2TextBlock | class-subClass | us-gaap:OilAndGasPropertiesPolicyPolicyTextBlock |
| 203 | fro:Level2TextBlock | class-subClass | us-gaap:OutageCostsPolicy |
| 204 | fro:Level2TextBlock | class-subClass | us-gaap:ParticipationCostsPolicyPolicyTextBlock |
| 205 | fro:Level2TextBlock | class-subClass | us-gaap:PensionAndOtherPostretirementPlansNonpensionBenefitsPolicy |
| 206 | fro:Level2TextBlock | class-subClass | us-gaap:PensionAndOtherPostretirementPlansPensionsPolicy |
| 207 | fro:Level2TextBlock | class-subClass | us-gaap:PensionAndOtherPostretirementPlansPolicy |
| 208 | fro:Level2TextBlock | class-subClass | us-gaap:PlantConstructionUsingIntermediaryPolicy |
| 209 | fro:Level2TextBlock | class-subClass | us-gaap:PlantRetirementAndAbandonmentPolicy |
| 210 | fro:Level2TextBlock | class-subClass | us-gaap:PolicyLoansReceivablePolicy |
| 211 | fro:Level2TextBlock | class-subClass | us-gaap:PolicyholderAccountsPolicy |
| 212 | fro:Level2TextBlock | class-subClass | us-gaap:PolicyholdersDividendPolicy |
| 213 | fro:Level2TextBlock | class-subClass | us-gaap:PostemploymentBenefitPlansPolicy |
| 214 | fro:Level2TextBlock | class-subClass | us-gaap:PrecontractCostsPolicyTextBlock |
| 215 | fro:Level2TextBlock | class-subClass | us-gaap:PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy |
| 216 | fro:Level2TextBlock | class-subClass | us-gaap:PremiumsReceivableBasisOfAccountingPolicy |
| 217 | fro:Level2TextBlock | class-subClass | us-gaap:PresentValueOfFutureInsuranceProfitsPolicy |
| 218 | fro:Level2TextBlock | class-subClass | us-gaap:PresentationOfUnusedProceedsOfPollutionControlFinancingPolicy |
| 219 | fro:Level2TextBlock | class-subClass | us-gaap:PropertyLiabilityReserveEstimatePolicy |
| 220 | fro:Level2TextBlock | class-subClass | us-gaap:PropertyPlantAndEquipmentImpairment |
| 221 | fro:Level2TextBlock | class-subClass | us-gaap:PropertyPlantAndEquipmentPlannedMajorMaintenanceActivitiesPolicy |
| 222 | fro:Level2TextBlock | class-subClass | us-gaap:PropertyPlantAndEquipmentPolicyTextBlock |
| 223 | fro:Level2TextBlock | class-subClass | us-gaap:PropertyPlantAndEquipmentPreproductionDesignAndDevelopmentCosts |
| 224 | fro:Level2TextBlock | class-subClass | us-gaap:PublicUtilitiesPolicyTextBlock |
| 225 | fro:Level2TextBlock | class-subClass | us-gaap:PushdownAccountingPolicyTextBlock |
| 226 | fro:Level2TextBlock | class-subClass | us-gaap:RealEstateHeldForDevelopmentAndSalePolicy |
| 227 | fro:Level2TextBlock | class-subClass | us-gaap:RealEstateOwnedValuationAllowancePolicy |
| 228 | fro:Level2TextBlock | class-subClass | us-gaap:RealEstatePolicyTextBlock |
| 229 | fro:Level2TextBlock | class-subClass | us-gaap:ReceivablesHeldForSaleDeterminationPolicy |
| 230 | fro:Level2TextBlock | class-subClass | us-gaap:ReceivablesHeldForSaleLowerOfCostOrFairValuePolicy |
| 231 | fro:Level2TextBlock | class-subClass | us-gaap:ReceivablesAndPortionsOfSecuritizationsThatCanBePrepaidAtPotentialLossPolicyPolicyTextBlock |
| 232 | fro:Level2TextBlock | class-subClass | us-gaap:ReceivablesPolicyTextBlock |
| 233 | fro:Level2TextBlock | class-subClass | us-gaap:PriorPeriodReclassificationAdjustmentDescription |
| 234 | fro:Level2TextBlock | class-subClass | us-gaap:RegulatoryDepreciationAndAmortizationPolicy |
| 235 | fro:Level2TextBlock | class-subClass | us-gaap:RegulatoryEnvironmentalCostsPolicy |
| 236 | fro:Level2TextBlock | class-subClass | us-gaap:RegulatoryIncomeTaxesPolicy |
| 237 | fro:Level2TextBlock | class-subClass | us-gaap:ReinsuranceAccountingPolicy |
| 238 | fro:Level2TextBlock | class-subClass | us-gaap:RepurchaseAgreementsCollateralPolicy |
| 239 | fro:Level2TextBlock | class-subClass | us-gaap:RepurchaseAgreementsValuationPolicy |
| 240 | fro:Level2TextBlock | class-subClass | us-gaap:RepurchaseAndResaleAgreementsPolicy |
| 241 | fro:Level2TextBlock | class-subClass | us-gaap:ResearchAndDevelopmentExpensePolicy |
| 242 | fro:Level2TextBlock | class-subClass | us-gaap:ResearchDevelopmentAndComputerSoftwarePolicyTextBlock |
| 243 | fro:Level2TextBlock | class-subClass | us-gaap:RetailLandSalesPolicyPolicyTextBlock |
| 244 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionAccountingPolicyGrossAndNetRevenueDisclosure |
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| 248 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionForAlternativeRevenueProgramsPolicy |
| 249 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionFromLongTermPowerSalesContractsPolicy |
| 250 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionAdvertisingBarterTransactions |
| 251 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionAllowances |
| 252 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionBillAndHoldArrangements |
| 253 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionCargoAndFreightPolicyPolicyTextBlock |
| 254 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionCompletedContractMethod |
| 255 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionCustomerAcquisitions |
| 256 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionDeferredRevenue |
| 257 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionDiscounts |
| 258 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionDividends |
| 259 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionGiftCards |
| 260 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionIncentives |
| 261 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionInterest |
| 262 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionLongTermContracts |
| 263 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionLongTermContractsIncentiveAndAwardFees |
| 264 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionLoyaltyPrograms |
| 265 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionMultipleElementArrangements |
| 266 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionPercentageOfCompletionMethod |
| 267 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionPolicyTextBlock |
| 268 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionPremiumsEarnedPolicy |
| 269 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionRealEstateTransactionsPolicy |
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| 271 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionRegionalCarriersAndPassengersPolicyPolicyTextBlock |
| 272 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionRetailLandSales |
| 273 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionRetrospectiveRateSettingSystemsPolicyPolicyTextBlock |
| 274 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionRevenueReductions |
| 275 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionSalesReturns |
| 276 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionSalesOfGoods |
| 277 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionSalesOfServices |
| 278 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionServicesCommissions |
| 279 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionServicesFranchiseFees |
| 280 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionServicesLicensingFees |
| 281 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionServicesManagementFees |
| 282 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionServicesRefundableFeesForServices |
| 283 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionServicesRoyaltyFees |
| 284 | fro:Level2TextBlock | class-subClass | us-gaap:RevenueRecognitionSoftware |
| 285 | fro:Level2TextBlock | class-subClass | us-gaap:RoyaltyTrustDistributableIncomePolicy |
| 286 | fro:Level2TextBlock | class-subClass | us-gaap:SaleLeasebackTransactionsPolicy |
| 287 | fro:Level2TextBlock | class-subClass | us-gaap:SalesInducementsToContractHoldersPolicy |
| 288 | fro:Level2TextBlock | class-subClass | us-gaap:SalesMethodOrEntitlementsMethodPolicy |
| 289 | fro:Level2TextBlock | class-subClass | us-gaap:SecuritiesBorrowedAndLoanedPolicy |
| 290 | fro:Level2TextBlock | class-subClass | us-gaap:SecuritiesOwnedNotReadilyMarketablePolicy |
| 291 | fro:Level2TextBlock | class-subClass | us-gaap:SegmentReportingPolicyPolicyTextBlock |
| 292 | fro:Level2TextBlock | class-subClass | us-gaap:SelfInsuranceReservePolicyTextBlock |
| 293 | fro:Level2TextBlock | class-subClass | us-gaap:SellingGeneralAndAdministrativeExpensesPolicyTextBlock |
| 294 | fro:Level2TextBlock | class-subClass | us-gaap:ShareBasedCompensationOptionAndIncentivePlansPolicy |
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| 297 | fro:Level2TextBlock | class-subClass | us-gaap:ShippingAndHandlingCostPolicyTextBlock |
| 298 | fro:Level2TextBlock | class-subClass | us-gaap:ShortDurationContractsRevenueRecognitionPolicy |
| 299 | fro:Level2TextBlock | class-subClass | us-gaap:ShortDurationContractsPolicy |
| 300 | fro:Level2TextBlock | class-subClass | us-gaap:SoftwareToBeSoldLeasedOrOtherwiseMarketedPolicy |
| 301 | fro:Level2TextBlock | class-subClass | us-gaap:StandardProductWarrantyPolicy |
| 302 | fro:Level2TextBlock | class-subClass | us-gaap:StartUpActivitiesCostPolicy |
| 303 | fro:Level2TextBlock | class-subClass | us-gaap:StockholdersEquityNoteRedeemablePreferredStockIssuePolicy |
| 304 | fro:Level2TextBlock | class-subClass | us-gaap:StockholdersEquityPolicyTextBlock |
| 305 | fro:Level2TextBlock | class-subClass | us-gaap:SubsequentEventsPolicyPolicyTextBlock |
| 306 | fro:Level2TextBlock | class-subClass | us-gaap:TradeAndLoanReceivablesMethodOfAccountingForReceivablesThatCanBeContractuallyPrepaidPolicyPolicyTextBlock |
| 307 | fro:Level2TextBlock | class-subClass | us-gaap:TradeAndLoanReceivablesNonmortgageLoansHeldForSalePolicyPolicyTextBlock |
| 308 | fro:Level2TextBlock | class-subClass | us-gaap:TradeAndOtherAccountsReceivablePolicy |
| 309 | fro:Level2TextBlock | class-subClass | us-gaap:TradeAndOtherAccountsReceivableUnbilledReceivablesPolicy |
| 310 | fro:Level2TextBlock | class-subClass | us-gaap:TransfersAndServicingOfFinancialAssetsPolicyTextBlock |
| 311 | fro:Level2TextBlock | class-subClass | us-gaap:TransfersAndServicingOfFinancialAssetsServicingOfFinancialAssetsPolicy |
| 312 | fro:Level2TextBlock | class-subClass | us-gaap:TransfersAndServicingOfFinancialAssetsTransfersOfFinancialAssetsAggregationPolicy |
| 313 | fro:Level2TextBlock | class-subClass | us-gaap:TransfersAndServicingOfFinancialAssetsTransfersOfFinancialAssetsFinancingsPolicy |
| 314 | fro:Level2TextBlock | class-subClass | us-gaap:TransfersAndServicingOfFinancialAssetsTransfersOfFinancialAssetsPolicy |
| 315 | fro:Level2TextBlock | class-subClass | us-gaap:TransfersAndServicingOfFinancialAssetsTransfersOfFinancialAssetsSalesPolicy |
| 316 | fro:Level2TextBlock | class-subClass | us-gaap:UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy |
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