XML 69 R61.htm IDEA: XBRL DOCUMENT
v3.20.1

ACCOUNTING POLICIES (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 reporting_unit recycling_market lease | Jan. 31, 2019 | Jun. 30, 2018
Property, Plant and Equipment [Line Items] |  |  |
Number of leases acquired through merger | lease | 3 |  |
Ownership percentage |  | 28.90% | 20.00%
Average period over which market price of scrap per ton is calculated | 10 years |  |
Number of recycling markets | recycling_market | 3 |  |
Number of reporting units | reporting_unit | 1 |  |
Vessel |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated remaining economic useful life | 25 years |  |
Other equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated remaining economic useful life | 5 years |  |
Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Ownership percentage | 20.00% |  |
Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Ownership percentage | 50.00% |  |

X
- Definition Average period over which market price of scrap per ton is calculated up to delivery date + References No definition available. + Details
Name: | fro_AveragePeriodOverWhichMarketPriceOfScrapPerTonIsCalculated
Namespace Prefix: | fro_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Finance Leases Acquired Through Merger + References No definition available. + Details
Name: | fro_NumberOfFinanceLeasesAcquiredThroughMerger
Namespace Prefix: | fro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Recycling Markets used to calculate the market price of scrap per tonne + References No definition available. + Details
Name: | fro_NumberOfRecyclingMarkets
Namespace Prefix: | fro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References No definition available. + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=fro_VesselsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_PropertyPlantAndEquipmentOtherTypesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |