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GENERAL GENERAL 2 (Details)
 0 Months Ended 12 Months Ended
Jul. 15, 2014
vessel
Dec. 31, 2014
vessel
Number of vessels owned by group   22fro_NumberOfVesselsOwnedByGroup
Number of vessels owned through ITCL 4fro_NumberOfVesselsOwnedThroughItcl  
VLCC Vessels [Member]    
Number of vessels owned by group   14fro_NumberOfVesselsOwnedByGroup
/ fro_VesselsByTypeAxis
= fro_VlccVesselsMember
Number of Vessels under Commercial Management   9fro_NumberofVesselsunderCommercialManagement
/ fro_VesselsByTypeAxis
= fro_VlccVesselsMember
Double Hull Suezmax [Member]    
Number of vessels owned by group   8fro_NumberOfVesselsOwnedByGroup
/ fro_VesselsByTypeAxis
= fro_DoubleHullSuezmaxMember
Number of Vessels on Order   1fro_NumberofVesselsonOrder
/ fro_VesselsByTypeAxis
= fro_DoubleHullSuezmaxMember
Number of Vessels under Commercial Management   6fro_NumberofVesselsunderCommercialManagement
/ fro_VesselsByTypeAxis
= fro_DoubleHullSuezmaxMember
Aframax [Member]    
Number of Vessels under Commercial Management   1fro_NumberofVesselsunderCommercialManagement
/ fro_VesselsByTypeAxis
= fro_AframaxMember