XML 106 R63.htm IDEA: XBRL DOCUMENT
v2.4.1.9

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

X
- Definition Number of Vessels on Order + References No definition available. + Details
Name: | fro_NumberofVesselsonOrder
Namespace Prefix: | fro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of vessels owned by Calpetro Group + References No definition available. + Details
Name: | fro_NumberOfVesselsOwnedByGroup
Namespace Prefix: | fro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of vessels owned through ITCL. + References No definition available. + Details
Name: | fro_NumberOfVesselsOwnedThroughItcl
Namespace Prefix: | fro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Vessels under Commercial Management + References No definition available. + Details
Name: | fro_NumberofVesselsunderCommercialManagement
Namespace Prefix: | fro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | fro_VesselsByTypeAxis=fro_AframaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fro_VesselsByTypeAxis=fro_DoubleHullSuezmaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | fro_VesselsByTypeAxis=fro_VlccVesselsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |