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DEBT (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2021
Debt Disclosure [Abstract] |
Schedule of assets pledged | Assets pledged
(in thousands of $) |  |  | 2021 | 2020
Vessels and equipment, net |  |  | 3,340,562 |  | 3,306,863 |

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- Definition Tabular disclosure of assets pledged as collateral at carrying value. + References No definition available. + Details
Name: | fro_AssetsPledgedTableTextBlock
Namespace Prefix: | fro_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration