XML 59 R52.htm IDEA: XBRL DOCUMENT
v3.21.2

INVESTMENTS IN DEBT AND EQUITY SECURITIES (Narrative) (Details) $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2021 USD ($) vessel | Jun. 30, 2021 USD ($) vessel shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 shares | Jun. 30, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Impairment loss |  |  | $ (4.9) |  |
Number of vessels sold | vessel |  | 0 |  |  |
ADS Maritime Holding |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Proceeds from dividends received | $ 8.8 |  |  |  |
Number of vessels sold | vessel | 2 |  |  |  |
Corporate Bond Securities Oro Negro 12% |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt instrument, redemption price (in percentage) |  |  | 12.00% |  |
Oro Negro 7.5% |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt instrument, redemption price (in percentage) |  |  | 7.50% |  |
NT Rig Holdco 12% |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt instrument, redemption price (in percentage) |  |  | 12.00% |  |
Purchase of corporate bonds |  |  | $ 1.3 |  |
NT Rig Holdco 7.5% |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt instrument, redemption price (in percentage) |  |  | 7.50% |  |
Impairment loss |  | $ (0.8) |  |  |
ADS Maritime Holding | Equity Securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Proceeds from sale of equity securities | $ 0.8 |  |  |  |
Common Stock, ADS |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Equity Securities, FV-NI, Realized Gain (Loss) | $ 0.7 |  |  |  |
Common stock - Frontline Ltd |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Investment owned, balance (in shares) | shares |  |  | 1,400,000 |  |
Number of shares repurchased in forward contract (in shares) | shares |  | 1,400,000 |  | 3,400,000 |
Principal debt amount |  | $ 15.6 | $ 15.6 |  | $ 36.8
Sale of stock (in shares) | shares |  |  | 2,000,000 |  |
Proceeds from sale and maturity of equity securities |  |  | $ 21.1 |  |
Debt and equity securities, realized gain |  |  | 2.3 |  |
Forward contract to repurchase shares |  |  | $ 16.2 |  |
Common stock - Frontline Ltd | Frontline Forward Contract |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Investment owned, balance (in shares) | shares |  | 1,400,000 |  |  |
Forward contract to repurchase shares |  | $ 16.3 |  |  |

X
- Definition Forward Contract To Repurchase Shares + References No definition available. + Details
Name: | sfl_ForwardContractToRepurchaseShares
Namespace Prefix: | sfl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Forward Contract To Repurchase Shares, Number Of Shares + References No definition available. + Details
Name: | sfl_ForwardContractToRepurchaseSharesNumberOfShares
Namespace Prefix: | sfl_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Vessels Sold + References No definition available. + Details
Name: | sfl_NumberOfVesselsSold
Namespace Prefix: | sfl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase Of Corporate Bonds + References No definition available. + Details
Name: | sfl_PurchaseOfCorporateBonds
Namespace Prefix: | sfl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of realized gain (loss) on investment in debt and equity securities. + References No definition available. + Details
Name: | us-gaap_DebtAndEquitySecuritiesRealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=120269885&loc=SL75117546-209714 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
Name: | us-gaap_EquitySecuritiesFvNiRealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Balance held at close of period in number of shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column B)) -URI http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010 + Details
Name: | us-gaap_InvestmentOwnedBalanceShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=121553693&loc=SL6284422-111562 + Details
Name: | us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Dividends received on equity and other investments during the current period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 16 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3337-108585 + Details
Name: | us-gaap_ProceedsFromDividendsReceived
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow associated with the sale, maturities, repayments and calls of securities classified as trading securities and held for investment purposes. Excludes proceeds from trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time). + References No definition available. + Details
Name: | us-gaap_ProceedsFromSaleAndMaturityOfTradingSecuritiesHeldforinvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow associated with the sale of securities classified as trading securities and held for investment purposes. Excludes proceeds from trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time). + References No definition available. + Details
Name: | us-gaap_ProceedsFromSaleOfTradingSecuritiesHeldforinvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=sfl_ADSMaritimeHoldingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sfl_CorporateBondSecuritiesOroNegro12Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sfl_CorporateBondSecuritiesOroNegro75Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sfl_CorporateBondSecuritiesNTRigHoldco12Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sfl_CorporateBondSecuritiesNTRigHoldco75Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sfl_ADSMaritimeHoldingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sfl_CommonStockADSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sfl_CommonStockFrontlineLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=sfl_FrontlineForwardContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |