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v2.4.1.9

INCOME TAXES (Details) | 12 Months Ended
--- | ---
Dec. 31, 2014
Income Tax Disclosure [Abstract] |
Foreign tax exemption expiration date | 2035-03-31

X
- Definition The expiration date for the foreign tax exemption. + References No definition available. + Details
Name: | fro_ForeignTaxExemptionExpirationDate
Namespace Prefix: | fro_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration