$150 million term loan facility $150 million term loan facility [Member] $150 million term loan facility Statistical Measurement [Domain] Statistical Measurement [Domain] Vessels, Rigs And Equipment, Capital Upgrades Vessels, Rigs And Equipment, Capital Upgrades [Member] Vessels, Rigs And Equipment, Capital Upgrades Schedule of Capital Improvements, Newbuildings and Vessel Purchase Deposits Schedule of Capital Improvements, Newbuildings and Vessel Purchase Deposits [Table Text Block] Schedule of Capital Improvements, Newbuildings and Vessel Purchase Deposits Entity File Number Entity File Number Additional paid-in capital Additional Paid-in Capital [Member] Interest rate swaps Interest Rate Swap [Member] Debt fees paid Payments of Financing Costs Newbuilding Dual-Fuel Container Vessels Newbuilding Dual-Fuel Container Vessels [Member] Newbuilding Dual-Fuel Container Vessels OTHER FINANCIAL ITEMS Other Income and Other Expense Disclosure [Text Block] Equity in earnings of associated companies Equity in earnings of associated companies Income (Loss) from Equity Method Investments Recently Issued Accounting Standards and Recently Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] $40.5 million lease debt financing $40.5 Million Lease Debt Financing [Member] $40.5 Million Lease Debt Financing Pledged Status [Axis] Pledged Status [Axis] Schedule of carrying value and estimated fair value of financial assets and liabilities Fair Value, by Balance Sheet Grouping [Table Text Block] Realized Gain (Loss) on Disposal of Assets and Termination of Vessels Realized Gain (Loss) on Disposal of Assets and Termination of Vessels [Table Text Block] Realized Gain (Loss) on Disposal of Assets and Termination of Vessels Notes receivables from related parties, interest rate Notes Receivables From Related Parties, Interest Rate Notes Receivables From Related Parties, Interest Rate Measurement Basis [Axis] Measurement Basis [Axis] Basic earnings/(loss) per share (in USD per share) Earnings Per Share, Basic Number of tankers being upgraded Number Of Tankers Being Upgraded Number Of Tankers Being Upgraded RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Amortization of charter related deferred asset and straight-lining of operating leases Amortization of Charter Related Deferred Asset and Straight-Lining of Operating Leases Amortization of Charter Related Deferred Asset and Straight-Lining of Operating Leases Capital improvements in progress and newbuildings Capital improvements in progress and newbuildings Capital Improvements, Newbuildings And Vessel Purchase Deposits Capital Improvements, Newbuildings And Vessel Purchase Deposits Seatankers Seatankers [Member] Seatankers [Member] $72.2 million lease debt financing $72.2 Million Lease Debt Financing1 [Member] $72.2 Million Lease Debt Financing1 Other comprehensive income/(loss), net of tax Other Comprehensive Income (Loss), Net of Tax Less: Unamortized debt issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Container Vessel Container Vessel [Member] Container Vessel Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Litigation settlement, amount awarded from other party Litigation Settlement, Amount Awarded from Other Party Asset Pledged as Collateral without Right Asset Pledged as Collateral without Right [Member] Newbuildings Newbuilding Costs Newbuilding Costs Stockholders’ equity Equity starting balance Equity ending balance Equity, Attributable to Parent Vessel impairment charge Asset Impairment Charges $107.3 million term loan facility $107.3 Million Term Loan Facility [Member] $107.3 Million Term Loan Facility Common stock, shares authorized (in shares) Common Stock, Shares Authorized Hedging Designation [Domain] Hedging Designation [Domain] Shares issued (in shares) Stock Issued During Period, Shares, New Issues Current assets Assets, Current [Abstract] Total liabilities and stockholders’ equity Liabilities and Equity Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Sales price for the vessel Sales Price Of Vessel Sales Price Of Vessel LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] Debt securities Debt Securities, Held-to-Maturity, Purchase Debt Instrument [Line Items] Debt Instrument [Line Items] Treasury stock Treasury Stock, Common [Member] Other related parties Other Related Parties [Member] The aggregate of all other parties, not specifically defined elsewhere, related to the reporting entity through direct or indirect significant interests. Total debt principal Debt, Long-Term and Short-Term, Combined Amount 5.75% senior unsecured convertible notes due 2021 Senior Unsecured Convertible Bonds Due 2021 [Member] Senior Unsecured Convertible Bonds due 2021 [Member] Number of carriers being upgraded Number Of Carriers Being Upgraded Number Of Carriers Being Upgraded Income/(Loss) before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Purchase options exercised, number of leased vessels Purchase Options Exercised, Number Of Leased Vessels Purchase Options Exercised, Number Of Leased Vessels Value of authorized share capital Authorized Common Stock, Value The maximum par or stated value of common shares permitted to be issued by an entity's charter and bylaws. Other long-term liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Proceeds from debt Proceeds from Issuance of Debt Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Fair value adjustments to hedging financial instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Less: Current portion of long-term debt Long-Term Debt, Current Maturities Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Short-term debt and current portion of long-term debt Short-Term Debt And Long-Term Debt, Current Maturities Short-Term Debt And Long-Term Debt, Current Maturities Comprehensive income/(loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Disposal Group Name [Domain] Disposal Group Name [Domain] Secured Overnight Financing Rate (“SOFR”), closing rate Secured Overnight Financing Rate ("SOFR"), closing rate Secured Overnight Financing Rate ("SOFR"), closing rate Interest income – long-term loans to associated companies Interest Income Which Are Derived From Loans To Associates Interest income related parties which are derived from long-term loans to associates Document Fiscal Period Focus Document Fiscal Period Focus Senior Unsecured Convertible Bonds Due 2023 Senior Unsecured Convertible Bonds Due 2023 [Member] Senior Unsecured Convertible Bonds due 2023 [Member] Long-term debt Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Financial Assets And Liabilities [Table] Financial Assets And Liabilities [Table] Financial Assets And Liabilities [Table] Investment, Name [Domain] Investment, Name [Domain] Interest and valuation gain/(loss) on non-designated derivatives Dividend Income From Related Parties Dividend Income From Related Parties $100 million term loan facility $100 Million Term Loan Facility [Member] $100 Million Term Loan Facility Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Number of container vessels Number Of Container Vessels Number Of Container Vessels INTERIM FINANCIAL INFORMATION Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Newbuilding Dual-Fuel Car Carrier Newbuilding Dual-Fuel 7,000 CEU Car Carrier [Member] Newbuilding Dual-Fuel 7,000 CEU Car Carrier NorAm Drilling Common Stock-NorAm Drilling [Member] NorAm Drilling [Member] Dividends declared (in USD per share) Common Stock, Dividends, Per Share, Declared Vessel impairment charge Impairment, Long-Lived Asset, Held-for-Use Northern Ocean Northern Ocean Operations Ltd. [Member] Northern Ocean Operations Ltd. Investments in associated companies Equity Method Investments $226 million term loan facility $226 million term loan facility [Member] $226 million term loan facility Related Party Related Party [Member] Shares outstanding starting balance (in shares) Shares outstanding ending balance (in shares) Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding U.S. dollar denominated floating rate debt Long Term Debt- Floating Interest Rate Long Term Debt- Floating Interest Rate. Balance of long term debt from floating interest rate loans before unamortised debt issuance costs Number of leased vessels Lessor, Number of Leased Vessels Lessor, Number of Leased Vessels Capital improvements in progress Capital Improvements In Progress Capital Improvements In Progress Number of newbuild car carriers, not yet chartered Number Of Newbuild Car Carriers, Not Yet Chartered Number Of Newbuild Car Carriers, Not Yet Chartered Proceeds from issuance of senior long-term debt Proceeds from Issuance of Senior Long-Term Debt Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Retained earnings / (accumulated deficit) Retained Earnings [Member] Asian Ace Asian Ace [Member] Asian Ace Schedule of interest rate information Interest Rate Information [Table Text Block] Interest Rate Information Proceeds from sale of vessels Cash Element of Proceeds from (Payments Of) Sale Of Vessels Cash Element of Proceeds from (Payments Of) Sale Of Vessels Pledged Status [Domain] Pledged Status [Domain] Debt instrument, interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Payment Arrangement [Abstract] Other Financial Items [Abstract] Other Financial Items [Abstract] Other Financial Items [Abstract] Cash and cash equivalents at start of the period Cash and cash equivalents at end of the period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] $38.5 million lease debt financing $38.5 Million Lease Debt Financing [Member] $38.5 Million Lease Debt Financing Tax expense Income Tax Expense (Benefit) Sale of Stock [Domain] Sale of Stock [Domain] Financial instruments at fair value, long-term portion Derivative Liability, Noncurrent $37 million lease debt financing $37 million lease debt financing [Member] $37 million lease debt financing Designated as hedging instrument Designated as Hedging Instrument [Member] Unsecured fixed rate bonds, principal amounts resold Unsecured Fixed Rate Bonds, Principal Amounts Resold Unsecured Fixed Rate Bonds, Principal Amounts Resold Cost Property, Plant and Equipment, Gross $65 million lease debt financing $65 Million Lease Debt Financing1 [Member] $65 Million Lease Debt Financing1 Vessels, Rigs And Equipment, Special Periodic Survey Vessels, Rigs And Equipment, Special Periodic Survey [Member] Vessels, Rigs And Equipment, Special Periodic Survey Non-Derivatives [Abstract] Non-Derivatives [Abstract] Non-Derivatives Allowance for expected credit losses Allowance for Credit Loss, Receivable, Other, Current Derivative, notional amount Derivative, Notional Amount Other Income and Expenses [Abstract] Other Income and Expenses [Abstract] Dividends payable (in usd per share) Dividends Payable, Amount Per Share Interest costs capitalized Interest Costs Capitalized Other investments Proceeds from (Payments for) Other Investments Proceeds from (Payments for) Other Investments Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] $35 million term loan facility $35 Million Term Loan Facility [Member] $35 Million Term Loan Facility Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Number of container vessels under construction Number of Container Vessels Under Construction Number of Container Vessels Under Construction Debt instrument, term Approx. term Debt Instrument, Term Related Party Transactions [Abstract] Related Party Transactions [Abstract] Useful life Property, Plant and Equipment, Useful Life Subsequent event Subsequent Event [Member] $77.5 million lease debt financing $77.5 Million Lease Debt Financing1 [Member] $77.5 Million Lease Debt Financing1 Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Depreciation Depreciation U.S. dollar denominated fixed rate debt due 2026 U.S. Dollar Denominated Fixed Rate Debt Due 2026 [Member] U.S. Dollar Denominated Fixed Rate Debt Due 2026 Net cash flows on swaps Payments for Derivative Instrument, Financing Activities Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Impaired Long-Lived Assets Held and Used [Line Items] Impaired Long-Lived Assets Held and Used [Line Items] Number of reportable segments Number of Reportable Segments Derivatives [Abstract] Derivatives [Abstract] Derivatives Container Vessels And Car Carriers Container Vessels And Car Carriers [Member] Container Vessels And Car Carriers Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Schedule of Lease Debt Financing Facilities Outstanding Schedule of Lease Debt Financing Facilities Outstanding [Table Text Block] Schedule of Lease Debt Financing Facilities Outstanding Dividends declared Dividends, Common Stock Related Party [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current (Gain)/Loss on investments in equity securities Equity Securities, FV-NI, Gain (Loss) Derivative Instrument [Axis] Derivative Instrument [Axis] Loss on repurchase of bonds Gain (Loss) on Repurchase of Debt Instrument Cash dividends paid Payments of Ordinary Dividends, Common Stock Entity [Domain] Entity [Domain] Net cash provided by/(used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation 7.75% senior unsecured sustainability-linked bonds due 2030 7.75% Senior Unsecured Sustainability-linked Bonds Due 2030 [Member] 7.75% Senior Unsecured Sustainability-linked Bonds Due 2030 Total derivative instruments - long-term assets Interest rate/ currency swap contracts - long-term receivables Derivative Asset, Noncurrent Document Fiscal Year Focus Document Fiscal Year Focus Basis of accounting Basis of Accounting, Policy [Policy Text Block] CAPITAL IMPROVEMENTS IN PROGRESS AND NEWBUILDINGS Capital Improvements, Newbuildings, And Vessel Purchase Deposits, Text Block [Text Block] Capital Improvements, Newbuildings, And Vessel Purchase Deposits, Text Block Other items Other Items - Sundry Income Or Expense Other Items - Sundry Income Or Expense Carrying value Reported Value Measurement [Member] $60 million loan facility $60 Million Loan Facility [Member] $60 Million Loan Facility Options exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Shares cancelled (in shares) Shares cancelled (in shares) Stock Issued During Period, Shares, Cancelled Stock Issued During Period, Shares, Cancelled Installation Of Optimization Upgrades Installation Of Optimization Upgrades [Member] Installation Of Optimization Upgrades Gain/(Loss) on investments in equity securities Debt and Equity Securities, Gain (Loss) Not designated as hedging instrument Not Designated as Hedging Instrument [Member] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Commitments and Contingencies [Line Items] Other Commitments [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Schedule of movements of vessels and equipment Vessels and Equipment [Table Text Block] Tabular disclosure of the cost, accumulated depreciation and net carrying values of vessels and equipment used in the normal course of business to generate operating revenue, excluding capital lease assets. Other long-term assets Other Assets, Noncurrent Loans and long-term receivables from related parties including associates Loans to related parties - associated companies, long-term Financing Receivable, after Allowance for Credit Loss, Noncurrent Vessels, rigs and equipment, net Vessels, Rigs And Equipment, Net Vessels and equipment, net. Entity Central Index Key Entity Central Index Key Profit sharing income Profit Sharing Revenues Profit from non related parties derived from the bunker savings following Scrubber installation 60 Million Reverse Stock Loan Facility 60 Million Reverse Stock Loan Facility [Member] 60 Million Reverse Stock Loan Facility Total operating revenues Revenues Interest and valuation gain/(loss) on non-designated derivatives Total cash movement and valuation gain/(loss) on non-designated derivatives Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Basic and diluted earnings/(loss) per share: Basic Earnings (Loss) Per Share [Abstract] Basic Earnings (Loss) Per Share River Box River Box Holding Inc. ("River Box") River Box Holding Inc. [Member] River Box Holding Inc. Subsequent Event Type [Axis] Subsequent Event Type [Axis] SHARE OPTION PLAN Share-Based Payment Arrangement [Text Block] Repayments from investment in sales-type assets Proceeds from Lease Payment, Operating Activity ASSETS Assets [Abstract] Long-term debt Total long-term debt Long-Term Debt, Excluding Current Maturities $77.5 million lease debt financing $77.5 Million Lease Debt Financing2 [Member] $77.5 Million Lease Debt Financing2 Repayment of debt Repayments of short term and long term debt Repayments of short term and long term debt The cash outflow for short-term and long-term debt. Nonrelated Party Nonrelated Party [Member] Other Commitments [Axis] Other Commitments [Axis] Loans and leases receivable, related parties Loans and Leases Receivable, Related Parties Debt Instrument [Axis] Debt Instrument [Axis] Loss on repurchase of bonds Gain (Loss) on Extinguishment of Debt Stockholders’ equity Equity, Attributable to Parent [Abstract] Treasury stock at cost (0 and 1,252,657 shares, respectively) Treasury Stock, Value, Acquired, Cost Method Accumulated other comprehensive income/(loss) AOCI Attributable to Parent [Member] Investment, Name [Axis] Investment, Name [Axis] Senior unsecured interest rate (in percentage) Debt Instrument, Interest Rate, Stated Percentage Capital Upgrades Capital Upgrades [Member] Capital Upgrades Schedule of U.S .Dollar Floating Rate Debt Facilities Outstanding Floating Rate Debt New Facilities And Redemptions [Table Text Block] Floating Rate Debt New Facilities And Redemptions FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Share Capital Schedule of Stock by Class [Table Text Block] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Number of newbuild car carriers, long-term charters Number Of Newbuild Car Carriers, Long-Term Charters Number Of Newbuild Car Carriers, Long-Term Charters $65 million lease debt financing $65 Million Lease Debt Financing2 [Member] $65 Million Lease Debt Financing2 Effect of dilutive share options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Schedule of fair values of derivative instruments designated and not designated as cash flow hedges Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Frontline Shipping Frontline Charterers [Member] A party related to the reporting entity through a direct or indirect significant interest. Drilling contract revenues Drilling Contract Revenues Drilling Contract Revenues Related Party Transaction [Line Items] Related Party Transaction [Line Items] $81.6 million term loan facility $81.6 million term loan facility [Member] $81.6 million term loan facility Counterparty Name [Domain] Counterparty Name [Domain] Schedule of short-term and long-term debt Schedule of Debt [Table Text Block] Investments in debt and equity securities Investments Related Party [Axis] Related and Nonrelated Parties [Axis] Own-share lending arrangement, shares, issued (in shares) Own-share Lending Arrangement, Shares, Issued Number of rigs Number Of Rigs Number Of Rigs Sale of Stock [Axis] Sale of Stock [Axis] INTERIM FINANCIAL DATA [Abstract] INTERIM FINANCIAL DATA [Abstract] INTERIM FINANCIAL DATA [Abstract] Seadrill Seadrill [Member] A party related to the reporting entity through a direct or indirect significant interest. Norwegian Interbank Offered Rate (“NIBOR”), three-month, closing rate Three month Norwegian kroner NIBOR rate The three month Norwegian interbank offered rate (NIBOR) which is the reference rate related to existing floating rate debt denominated in Norwegian kroner. $150 million revolving credit facility $150 Million Revolving Credit Facility [Member] $150 Million Revolving Credit Facility Other, net Other Noncash Income (Expense) Aggregate contract price Long-Term Purchase Commitment, Amount U.S. dollar floating rate debt Debt Instrument, Face Amount Administrative expenses Administrative Expenses The aggregate total of expenses paid to non-related parties in connection with administering the affairs of an entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Fair value Estimate of Fair Value Measurement [Member] Purchase of vessels, capital improvements and newbuildings Purchase Of Vessels, Capital Improvements, Newbuildings and Deposits Cash outflow for acquisition of vessels, capital improvements and other additions Number of newbuild car carriers Number Of Newbuild Car Carriers Number Of Newbuild Car Carriers $144.6 million term loan facility $144.6 Million Term Loan Facility [Member] $144.6 Million Term Loan Facility Number of vessels being upgraded Number Of Vessels Being Upgraded Number Of Vessels Being Upgraded Other commitment Other Commitment Net changes in operating assets and liabilities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital Operating revenues Revenues [Abstract] Deposit assets Deposit Assets Interest income – sales-type leases Sales-type Lease, Interest Income Paratus Paratus [Member] Paratus Amortization of stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Frontline Frontline Ltd [Member] A party related to the reporting entity through a direct or indirect significant interest. $72.2 million lease debt financing $72.2 Million Lease Debt Financing2 [Member] $72.2 Million Lease Debt Financing2 Financial Instruments [Domain] Financial Instruments [Domain] INVESTMENTS IN DEBT AND EQUITY SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Drip Arrangement Drip Arrangement [Member] Drip Arrangement 8.875% senior unsecured sustainability-linked bonds due 2027 8.875% Senior Unsecured Sustainability-Linked Bonds Due 2027 [Member] 8.875% Senior Unsecured Sustainability-Linked Bonds Due 2027 Property, plant and equipment, capital upgrades Property, Plant And Equipment, Capital Upgrades Property, Plant And Equipment, Capital Upgrades Minimum Minimum [Member] Change in allowance for expected credit losses Allowance for Expected Credit Losses (Income and Loss) Allowance for Expected Credit Losses (Income and Loss) Own-share lending arrangement, shares, outstanding Own-share Lending Arrangement, Shares, Outstanding Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Dividend Reinvestment Plan (drip) Dividend Reinvestment Plan (drip) [Member] Dividend Reinvestment Plan (drip) Fair Value Measurement [Domain] Fair Value Measurement [Domain] Schedule of amounts due from and to related parties, excluding direct financing lease balances Schedule Of Related Party Transactions, Amounts Due From And Due To Related Parties [Table Text Block] A tabular disclosure of amounts owed to and due from related parties. SHORT-TERM AND LONG-TERM DEBT Debt Disclosure [Text Block] Net (loss)/income available to stockholders (diluted) Net Income (Loss) Available to Common Stockholders, Diluted Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Value of issued and fully paid share capital Common Stock, Value, Issued Other operating income Other Operating Income Northern Ocean Northern Ocean [Member] Northern Ocean COMMITMENTS AND CONTINGENT LIABILITIES Commitments and Contingencies Disclosure [Text Block] Premium on issuance Shares Issued, Premium On Issuance Shares Issued, Premium On Issuance Weighted average number of common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment Information Segment Reporting, Policy [Policy Text Block] Derivative [Table] Derivative [Table] Bond percentage, discount (as a percent) Effective Federal Funds Rate ("EEFR"), Closing Rate Effective Federal Funds Rate ("EEFR"), Closing Rate Net cash movement on non-designated derivatives and swap settlements Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss) Due To Cash Movement And Settlement, Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss) Due To Cash Movement And Settlement Purchase options exercised, aggregate amount Purchase Options Exercised, Aggregate Amount Purchase Options Exercised, Aggregate Amount Fixed Rate Debt Fixed Rate Debt [Member] Fixed Rate Debt Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Number of carriers under construction Number Of Carriers Under Construction Number Of Carriers Under Construction Diluted earnings/(loss) per share: Earnings Per Share, Diluted [Abstract] Proceeds from lines of credit Proceeds from Lines of Credit Own-share lending arrangement, shares, total issued under all share lending arrangement (in shares) Own-share Lending Arrangement, Shares, Total Issued under all Share Lending Arrangement Own-share Lending Arrangement, Shares, Total Issued under all Share Lending Arrangements Hedging Designation [Axis] Hedging Designation [Axis] Suezmax Vessels Suezmax Vessels [Member] Suezmax Vessels Interest income – other Other Interest and Dividend Income Document Type Document Type EARNINGS/(LOSS) PER SHARE Earnings Per Share [Text Block] Net Proceeds Net Sales Proceeds From Sale Of Vessels Proceeds from sale of vessels and termination of charters. Derivative Contract [Domain] Derivative Contract [Domain] Cash received/(paid) from share issuances and repurchases Proceeds from Issuance of Common Stock Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Adjustment to fair value of derivatives recognized in the statement of operations Net fair value movements of non-designated derivatives Unrealized Gain (Loss) on Derivatives Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Repurchase of shares, aggregate amount Share Repurchase Program, Authorized, Amount Weighted average interest rate Debt, Weighted Average Interest Rate Other receivables Total amount due from related parties Other Receivables, Net, Current Time charter revenues Time Charter Revenues Revenue from non-related parties derived from time charter contracts accounted for as operating leases. Number of dry bulk vessels sold Number of Dry Bulk Vessels Sold Number of Dry Bulk Vessels Sold Disposal Group Name [Axis] Disposal Group Name [Axis] Share options exercised, intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Schedule of other financial items, net Schedule of Other Financial Items, net [Table Text Block] Schedule of Other Financial Items, net [Table Text Block] Voyage charter and pool revenues Voyage Charter And Pool Revenues Voyage Charter And Pool Revenues Net (loss)/income available to stockholders (basic) Net Income (Loss) Available to Common Stockholders, Basic Other comprehensive income/(loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Current liabilities Liabilities, Current [Abstract] Derivative Instruments, Gain (Loss) Derivative Instruments, Gain (Loss) [Table Text Block] Total operating expenses Operating Expenses Gain on sale of vessels Gain on sale of vessels Gain (Loss) on Disposition of Assets Gain/(loss) on foreign currency translation Gain (Loss), Foreign Currency Transaction, before Tax Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Diluted earnings/(loss) per share (in USD per share) Earnings Per Share, Diluted Trade accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Interest income, operating Interest Income, Operating Lease debt financing Weighted average interest rate on lease debt financing Lease Debt Financing [Member] Lease Debt Financing Dividends declared Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings Number of shares issued in transaction (in shares) Sale of Stock, Number of Shares Issued in Transaction GAIN ON SALE OF VESSELS Gain on Sale of Assets and Termination of Charters [Text Block] The entire disclosure of the gains and losses related to sales of vessels during the period, including imputed sales price, book value, gain/(loss) and other details specific to each sale. Treasury stock (in shares) Treasury Stock, Common, Shares Dry Bulk Vessels Dry Bulk Vessels [Member] Dry Bulk Vessels Per share information: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Senior Debt Obligations Senior Debt Obligations [Member] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Capitalized lease debt financing interest Capitalized Lease Debt Financing Interest, Operating Activities Capitalized Lease Debt Financing Interest, Operating Activities Vessel, Type [Domain] Vessel, Type [Domain] [Domain] for Vessel, Type [Axis] Golden Ocean Golden Ocean [Member] A party related to the reporting entity through a direct or indirect significant interest. Shares repurchased (in shares) Treasury stock (in shares) Treasury Stock, Shares, Acquired 8.25% senior unsecured sustainability-linked bonds due 2028 8.25% Senior Unsecured Sustainability-linked Bonds Due 2028 [Member] 8.25% Senior Unsecured Sustainability-linked Bonds Due 2028 Shares option, weighted average exercise price (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Long-term debt, gross Long-Term Debt, Gross Initial strike price (usd per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price VESSELS, RIGS AND EQUIPMENT, NET Property, Plant and Equipment Disclosure [Text Block] SHARE CAPITAL, ADDITIONAL PAID-IN CAPITAL AND CONTRIBUTED SURPLUS Equity [Text Block] Number of dual-fuel car carriers Number Of Dual-Fuel Car Carriers Number Of Dual-Fuel Car Carriers Term of lease or charter (in years) Term Of Lease Or Charter The term, in years, from inception to expiration of a lease or charter. Investment owned, balance (in shares) Investment Owned, Balance, Shares Net income/(loss) Net income/(loss) Net income/(loss) Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Long-term liabilities Liabilities, Noncurrent [Abstract] Other Commitments [Domain] Other Commitments [Domain] Number of suezmax tankers operating in the spot market for which company pays management fee Number Of Suezmax Tankers Operating In The Spot Market For Which Company Pays Management Fee Number Of Suezmax Tankers Operating In The Spot Market For Which Company Pays Management Fee Vessel and rig operating expenses Ship And Rig Operating Expenses The aggregate direct operating costs, including management fees, of operating the vessels that are paid to non-related parties. Construction in Progress Construction in Progress [Member] Equity securities, unrealized gain (loss) Equity Securities, FV-NI, Unrealized Gain (Loss) Vesting period of options awarded to employees Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Vessels, rigs and equipment, net Property, Plant and Equipment, Net Cash received/(paid) from share issuances and repurchases Payments for Repurchase of Common Stock Car Carrier Car Carrier [Member] Car Carrier Notes receivables from related parties, term Notes Receivables From Related Parties, Term Notes Receivables From Related Parties, Term Chemical Tankers Chemical Tankers [Member] Chemical Tankers Other Income And Expenses Other Income And Expenses [Table] Other Income And Expenses Floating Rate Debt Weighted average interest rate on floating rate debt Floating Rate Debt [Member] Debt with a floating rate. Floating rate debt means it has variable coupon, equal to a money market reference rate, like LIBOR or federal funds rate, plus a spread. Derivative [Line Items] Derivative [Line Items] Operating income Operating Income (Loss) Front Ocean Front Ocean [Member] Front Ocean Capital Unit [Line Items] Capital Unit [Line Items] Cross currency interest rate swaps Cross Currency Interest Rate Contract [Member] Gain (loss) on disposition of vessels and equipment Gain (Loss) on Disposition of Property Plant Equipment Major Types of Debt and Equity Securities [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Number of options awarded (shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Repayments of debt Repayments of Debt Number Of Vessels Sold Under Finance Lease Number Of Vessels Sold Under Finance Lease Number Of Vessels Sold Under Finance Lease Amounts due from and to related parties [Abstract] Amounts due from and to related parties [Abstract] -- None. No documentation exists for this element. -- Current Fiscal Year End Date Current Fiscal Year End Date Subsequent Event Type [Domain] Subsequent Event Type [Domain] Options, expected term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term NOK750 million senior unsecured floating rate bonds due 2029 NOK750 Million Senior Unsecured Floating Rate Bonds Due 2029 [Member] NOK750 Million Senior Unsecured Floating Rate Bonds Due 2029 $79.8 million term loan facility $79.8 million term loan facility [Member] $79.8 million term loan facility Dividend income Investment Income, Dividend Vessels, Rigs And Equipment Vessels, Rigs And Equipment [Member] Vessels, Rigs And Equipment Statement [Table] Statement [Table] Other financial items, net Other financial items, net Other Nonoperating Income (Expense) Other Income And Expenses Other Income And Expenses [Line Items] Other Income And Expenses Adjustments to reconcile net income/(loss) to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 7.25% senior unsecured sustainability-linked bonds due 2026 7.25% Senior Unsecured Sustainability-Linked Bonds Due 2026 [Member] 7.25% Senior Unsecured Sustainability-Linked Bonds Due 2026 Equity Securities without Readily Determinable Fair Value [Table] Equity Securities without Readily Determinable Fair Value [Table] Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Securities without Readily Determinable Fair Value [Line Items] Equity Securities without Readily Determinable Fair Value [Line Items] Shares issued (in shares) Shares, Issued Variable Rate [Domain] Variable Rate [Domain] Equity securities Equity Securities, FV-NI, Current Other related parties Other Receivables, Gross, Current Management fee, percentage Management Fee, Percentage Management Fee, Percentage Schedule of assets pledged Schedule Of Assets Pledged [Table Text Block] Tabular disclosure of assets pledged to secure debt as of the reporting date. Long-Term Debt, Percentage Bearing Fixed Interest, Amount Long-Term Debt, Percentage Bearing Fixed Interest, Amount Amendment Flag Amendment Flag Debt securities Debt Securities, Current Other Commitments [Table] Other Commitments [Table] Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation SFL Thelon SFL Thelon [Member] SFL Thelon Foreign exchange gain/(loss) Realized Gain (Loss), Foreign Currency Transaction, before Tax $43 million lease debt financing $43 Million Lease Debt Financing [Member] $43 Million Lease Debt Financing Financial Assets And Liabilities [Line Items] Financial Assets And Liabilities [Line Items] Financial Assets And Liabilities [Line Items] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Weighted average number of common shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic SFL Yukon SFL Yukon [Member] SFL Yukon Share repurchase program, remaining authorized, amount Share Repurchase Program, Remaining Authorized, Amount Schedule of components of calculation of earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Origination of notes receivable from related parties Origination of Notes Receivable from Related Parties NorAm Drilling NorAm Drilling [Member] NorAm Drilling Subsequent Events [Abstract] Subsequent Events [Abstract] Amortization of deferred charges Amortization of Debt Issuance Costs Non-operating income/(expense) Nonoperating Income (Expense) [Abstract] No. of subsidiaries Number Of Wholly Owned Subsidiaries Of Company That Entered Into Loan Facility Agreement Number of wholly-owned subsidiaries of the Company that entered into a secured term loan facility agreement Vessel management fees Vessel Management Fees To Related Parties The aggregate direct operating costs, including management fees, of operating the vessels that are paid to related parties. Vessel, Type [Axis] Vessel, Type [Axis] Vessel, Type [Axis] Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Common Stock, Shares, Issued $235 million term loan facility $235 million term loan facility [Member] $235 million term loan facility $120 million lease debt financing $120 Million Lease Debt Financing2 [Member] $120 Million Lease Debt Financing2 Use of Estimates Use of Estimates, Policy [Policy Text Block] Other comprehensive income/(loss) Other Comprehensive Income (Loss) Net Of Tax Portion Attributable To Parent, Other This element represents Other Comprehensive Income or Loss, Net of Tax, for the period attributable to the parent entity which is not separately disclosed. $163.8 million term loan facility $163.8 million term loan facility [Member] $163.8 million term loan facility Interest expense Interest Expense, Nonoperating Lease income Operating Lease, Lease Income Number of tankers sold Number Of Tankers Sold Number Of Tankers Sold U.S. Dollar Floating Rate U.S. Dollar Floating Rate [Member] U.S. Dollar Floating Rate SUBSEQUENT EVENTS Subsequent Events [Text Block] Container Vessels Container Vessels [Member] Container Vessels Interest rate/ currency swap contracts - long-term payables Swap Contracts, Long Term Payables, Fair Value Disclosure Long term payables under interest rate swap contracts as of the balance sheet date. Total liabilities Liabilities Long-term Debt, by Current and Noncurrent [Abstract] Long-Term Debt, by Current and Noncurrent [Abstract] $100 million revolving credit facility $100 million revolving credit facility [Member] $100 million revolving credit facility Number of container vessels sold Number Of Container Vessels Sold Number Of Container Vessels Sold Operating expenses Operating Expenses [Abstract] Other current liabilities Due to related parties Other Liabilities, Current Shares issued Stock Issued During Period, Value, New Issues $120 million lease debt financing $120 Million Lease Debt Financing1 [Member] $120 Million Lease Debt Financing1 Statement [Line Items] Statement [Line Items] Equity, Capital Unit or Share [Table] Equity, Capital Unit or Share [Table] Variable Rate [Axis] Variable Rate [Axis] Cash and cash equivalents Cash and Cash Equivalent Cross currency swaps Cross Currency Contract [Member] Cross Currency Contract [Member] Long-Term Debt, Percentage Bearing Variable Interest, Amount Long-Term Debt, Percentage Bearing Variable Interest, Amount Counterparty Name [Axis] Counterparty Name [Axis] Subsequent Event [Line Items] Subsequent Event [Line Items] Share capital Common Stock [Member] $45 million lease debt financing $45 Million Lease Debt Financing [Member] $45 Million Lease Debt Financing Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Contributed surplus Other Additional Capital [Member]