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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	$ 40.9fro_NewbuildingInstallmentCommitments
Britannia Steam Ship Insurance Association [Member]
Commitments & contingencies [Line Items]
Maximum Aggregate Liability in Respect to Possible Claims	0.4fro_MaximumAggregateLiabilityinRespecttoPossibleClaims / dei_LegalEntityAxis = fro_BritanniaSteamShipInsuranceAssociationMember	1.7fro_MaximumAggregateLiabilityinRespecttoPossibleClaims / dei_LegalEntityAxis = fro_BritanniaSteamShipInsuranceAssociationMember
Restricted cash	0.4us-gaap_RestrictedCashAndCashEquivalents / dei_LegalEntityAxis = fro_BritanniaSteamShipInsuranceAssociationMember	1.7us-gaap_RestrictedCashAndCashEquivalents / dei_LegalEntityAxis = fro_BritanniaSteamShipInsuranceAssociationMember
Special Purpose Entities [Member]
Commitments & contingencies [Line Items]
Number of vessels sold and leased back	4fro_NumberOfVesselsSoldAndLeasedBack / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember	4fro_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	$ 36.0fro_TotalAmountOfPotentialPaymentUnderPutOptionsWithRespectToCapitalLeases / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember	$ 36.0fro_TotalAmountOfPotentialPaymentUnderPutOptionsWithRespectToCapitalLeases / dei_LegalEntityAxis = fro_SpecialPurposeEntitiesMember
Frontline 2012 Ltd [Member]
Commitments & contingencies [Line Items]
Number of newbuilding contracts under guarantee	5fro_Numberofnewbuildingcontractsunderguarantee / dei_LegalEntityAxis = fro_Frontline2012LtdMember
Number of newbuilding contracts settled	4fro_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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The amount of newbuilding installments expected.

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Number of newbuilding contracts under guarantee

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The number of vessels that had been sold and leased back to the Company.

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The total amount that the Company might be required to pay under put options related to capital leases.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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