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COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 60 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Commitments & contingencies [Line Items] |  |
Newbuilding installment Commitments | $ 40.9 fro_NewbuildingInstallmentCommitments |
Britannia Steam Ship Insurance Association [Member] |  |
Commitments & contingencies [Line Items] |  |
Maximum Aggregate Liability in Respect to Possible Claims | 0.4 fro_MaximumAggregateLiabilityinRespecttoPossibleClaims / dei_LegalEntityAxis = fro_BritanniaSteamShipInsuranceAssociationMember | 1.7 fro_MaximumAggregateLiabilityinRespecttoPossibleClaims / dei_LegalEntityAxis = fro_BritanniaSteamShipInsuranceAssociationMember
Restricted cash | 0.4 us-gaap_RestrictedCashAndCashEquivalents / dei_LegalEntityAxis = fro_BritanniaSteamShipInsuranceAssociationMember | 1.7 us-gaap_RestrictedCashAndCashEquivalents / dei_LegalEntityAxis = fro_BritanniaSteamShipInsuranceAssociationMember
Special Purpose Entities [Member] |  |
Commitments & contingencies [Line Items] |  |
Number of vessels sold and leased back | 4 fro_NumberOfVesselsSoldAndLeasedBack / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | 4 fro_NumberOfVesselsSoldAndLeasedBack / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember
Options on the lessor's side to extend the charters (upper range) | 5 years |
Total amount of potential payment under put options with respect to capital leases | $ 36.0 fro_TotalAmountOfPotentialPaymentUnderPutOptionsWithRespectToCapitalLeases / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember | $ 36.0 fro_TotalAmountOfPotentialPaymentUnderPutOptionsWithRespectToCapitalLeases / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember
Frontline 2012 Ltd [Member] |  |
Commitments & contingencies [Line Items] |  |
Number of newbuilding contracts under guarantee | 5 fro_Numberofnewbuildingcontractsunderguarantee / dei_LegalEntityAxis = fro_Frontline2012LtdMember |
Number of newbuilding contracts settled | 4 fro_Numberofnewbuildingcontractssettled / dei_LegalEntityAxis = fro_Frontline2012LtdMember |
Minimum [Member] | Special Purpose Entities [Member] |  |
Commitments & contingencies [Line Items] |  |
Sale Leaseback Transaction, Lease Term | 8 years |
Maximum [Member] | Special Purpose Entities [Member] |  |
Commitments & contingencies [Line Items] |  |
Sale Leaseback Transaction, Lease Term | 12 years 6 months |

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