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Long-Term Debt Long-Term Debt Narrative (Details) $ / shares in Units, € in Millions, shares in Millions, kr in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2018 USD ($) | Jun. 30, 2021 USD ($) term_loan vessel subsidiary shares SecurityLoan | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) term_loan vessel subsidiary shares SecurityLoan | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) vessel | Jun. 30, 2021 NOK (kr) term_loan vessel subsidiary shares SecurityLoan | Jun. 30, 2021 EUR (€) term_loan vessel subsidiary shares SecurityLoan | Jan. 01, 2021 USD ($) | Dec. 31, 2020 NOK (kr) vessel | Dec. 31, 2020 EUR (€) vessel | May 31, 2019 USD ($) | Jan. 26, 2018 USD ($) $ / shares
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  | $ 2,091,761,000 |  | $ 2,091,761,000 |  | $ 2,087,083,000 |  |  |  |  |  |  |
Long-term Debt |  | 2,068,719,000 |  | 2,068,719,000 |  | $ 2,055,107,000 |  |  |  |  |  |  |
Foreign exchange (loss) gain (notes 9 and 10) |  | $ (3,413,000) | $ (8,922,000) | $ 2,310,000 | $ (2,276,000) |  |  |  |  |  |  |  |
Long-term Debt, Weighted Average Interest Rate, at Point in Time |  | 3.90% |  | 3.90% |  | 3.80% | 3.90% | 3.90% |  | 3.80% | 3.80% |  |
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year |  | $ 201,200,000 |  | $ 201,200,000 |  |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two |  | 429,500,000 |  | 429,500,000 |  |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Three |  | 326,300,000 |  | 326,300,000 |  |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Four |  | $ 187,400,000 |  | $ 187,400,000 |  |  |  |  |  |  |  |  |
Number Of Loan Agreements | SecurityLoan |  | 7 |  | 7 |  |  | 7 | 7 |  |  |  |  |
Interest Expense |  | $ 48,694,000 | $ 59,245,000 | $ 97,633,000 | $ 121,765,000 |  |  |  |  |  |  |  |
Long-Term Debt, Maturity, Year One |  | 477,600,000 |  | 477,600,000 |  |  |  |  |  |  |  |  |
Long-Term Debt, Maturity, after Year Four |  | $ 469,800,000 |  | $ 469,800,000 |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Undrawn Revolving Credit Facilities Time To Maturity |  |  |  | 6 months |  |  |  |  |  |  |  |  |
2020 Debt Facility Maturing in December 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt |  | 5.00% |  | 5.00% |  |  | 5.00% | 5.00% |  |  |  |  |
Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Debt Instruments | term_loan |  |  |  | 7 |  |  |  |  |  |  |  |  |
Long-term debt, gross |  | $ 892,200,000 |  | $ 892,200,000 |  | $ 938,300,000 |  |  |  |  |  |  |
Number Of Debt Instruments With Balloon Or Bullet Payments | term_loan |  | 6 |  | 6 |  |  | 6 | 6 |  |  |  |  |
Number Of Vessels Held As Collateral | vessel |  | 19 |  | 19 |  | 20 | 19 | 19 |  | 20 | 20 |  |
Secured Debt [Member] | Remaining Term Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.26% |  | 4.26% |  |  | 4.26% | 4.26% |  |  |  |  |
Secured Debt [Member] | Remaining Term Loans [Member] | Fixed Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Debt Instruments | term_loan |  |  |  | 1 |  |  |  |  |  |  |  |  |
Secured Debt [Member] | Remaining Term Loans [Member] | Three Month London Interbank Offered Rate [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 1.85% |  |  |  |  |  |  |  |  |
Secured Debt [Member] | Remaining Term Loans [Member] | Three Month London Interbank Offered Rate [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 3.25% |  |  |  |  |  |  |  |  |
Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Ratio | 85.4701 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, If-converted Value in Excess of Principal | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 11.70
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Sale of Stock, Price Per Share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 9.75
Long-term debt, gross |  | $ 112,184,000 |  | $ 112,184,000 |  | $ 112,184,000 |  |  | $ 112,200,000 |  |  |  |
Long-term Debt |  | 110,600,000 |  | 110,600,000 |  |  |  |  | 111,000,000.0 |  |  |  |
Debt Instrument, Repurchased Face Amount |  |  |  |  |  | 12,800,000 |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  |  |  | $ 10,500,000 |  |  |  |  |  |  |
Unamortized Debt Issuance Expense |  | 1,200,000 |  | 1,200,000 |  |  |  |  | 1,600,000 |  |  |  |
Interest Expense |  | 1,600,000 |  | 3,200,000 |  |  |  |  |  |  |  |  |
Interest Expense, Debt |  | 1,400,000 |  | 2,800,000 |  |  |  |  |  |  |  |  |
Amortization of Debt Issuance Costs |  | 200,000 |  | 400,000 |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Level 2 | Fair Value Asset (Liability) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  | $ 110,000,000.0 |  | $ 110,000,000.0 |  |  |  |  | $ 101,600,000 |  |  |  |
Convertible Senior Notes due 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, percentage bearing fixed interest, percentage rate |  | 5.00% |  | 5.00% |  | 5.00% | 5.00% | 5.00% |  | 5.00% | 5.00% |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, percentage bearing fixed interest, percentage rate |  | 9.25% |  | 9.25% |  | 9.25% | 9.25% | 9.25% |  | 9.25% | 9.25% | 9.25% |
Debt instrument, principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 250,000,000.0 |
Long-term debt, gross |  | $ 243,395,000 |  | $ 243,395,000 |  | $ 243,395,000 |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount |  |  |  |  |  | 6,600,000 |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  |  |  | 6,200,000 |  |  |  |  |  |  |
Senior Notes [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  | 104.625% |  |  |  |  |  |  |  |  |
Senior Notes [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  | 102.313% |  |  |  |  |  |  |  |  |
Senior Notes [Member] | Debt Instrument, Redemption, Period Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  | 100.00% |  |  |  |  |  |  |  |  |
Revolving Credit Facilities due through 2024 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Credit Facilities | term_loan |  | 4 |  | 4 |  |  | 4 | 4 |  |  |  |  |
Credit facility, maximum borrowing capacity |  | $ 883,900,000 |  | $ 883,900,000 |  |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 528,900,000 |  | 528,900,000 |  |  |  |  |  |  |  |  |
Line Of Credit Reduction Of Available Borrowing Capacity Remainder Of Fiscal Year |  | 56,500,000 |  | 56,500,000 |  |  |  |  |  |  |  |  |
Line Of Credit Reduction Of Available Borrowing Capacity In Year Two |  | 65,300,000 |  | 65,300,000 |  |  |  |  |  |  |  |  |
Line Of Credit Reduction Of Available Borrowing Capacity In Year Three |  | $ 201,300,000 |  | $ 201,300,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Collateral, Number of Vessels | vessel |  | 33 |  | 33 |  |  | 33 | 33 |  |  |  |  |
Long-term debt, gross |  | $ 355,000,000 |  | $ 355,000,000 |  | $ 285,000,000 |  |  |  |  |  |  |
Number of unguaranteed debt | vessel |  | 1 |  | 1 |  |  | 1 | 1 |  |  |  |  |
Line Of Credit Reduction Of Available Borrowing Capacity in Year One |  | $ 560,800,000 |  | $ 560,800,000 |  |  |  |  |  |  |  |  |
Revolving Credit Facilities due through 2024 | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 1.40% |  | 1.40% |  |  |  |  |  |  |
Revolving Credit Facilities due through 2024 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 4.25% |  | 4.25% |  |  |  |  |  |  |
Revolving Credit Facilities due through 2024 | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  | 150,000,000 |  | $ 150,000,000 |  |  |  |  |  |  |  |  |
Teekay LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum Level Of Free Cash Maintained Per Loan Agreements |  | 35,000,000.0 |  | 35,000,000.0 |  |  |  |  |  |  |  |  |
Teekay LNG | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] | Nibor Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, principal amount | kr |  |  |  |  |  |  | kr 3,100.0 |  |  | kr 3,100.0 |  |  |
Senior Notes |  | $ 354,500,000 |  | $ 354,500,000 |  | $ 355,500,000 |  |  |  |  |  |  |
Teekay LNG | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] | Nibor Loan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 4.60% |  | 4.60% |  |  |  |  |  |  |
Derivative, Fixed Interest Rate |  | 5.74% |  | 5.74% |  | 5.74% | 5.74% | 5.74% |  | 5.74% | 5.74% |  |
Teekay LNG | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] | Nibor Loan [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 6.00% |  | 6.00% |  |  |  |  |  |  |
Derivative, Fixed Interest Rate |  | 7.89% |  | 7.89% |  | 7.89% | 7.89% | 7.89% |  | 7.89% | 7.89% |  |
Teekay LNG | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Collateral, Number of Vessels | vessel |  | 2 |  | 2 |  |  | 2 | 2 |  |  |  |  |
Number Of Debt Instruments | term_loan |  |  |  | 2 |  |  |  |  |  |  |  |  |
Long-term Debt |  | $ 134,400,000 |  | $ 134,400,000 |  | $ 152,700,000 |  | € 113.4 |  |  | € 125.0 |  |
Number of Subsidiaries | subsidiary |  | 1 |  | 1 |  |  | 1 | 1 |  |  |  |  |
Teekay LNG | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 0.60% |  |  |  |  |  |  |  |  |
Teekay LNG | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 1.95% |  |  |  |  |  |  |  |  |
Teekay LNG | Revolving Credit Facilities due through 2024 | Common Class A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Collateral, Equity Interest in Subsidiaries, Number of Common Shares/Units | shares |  | 36.0 |  | 36.0 |  |  | 36.0 | 36.0 |  |  |  |  |
Teekay Tankers |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  | $ 29,800,000 |  | $ 29,800,000 |  | $ 32,000,000.0 |  |  |  |  |  |  |
Minimum Level Of Free Cash Maintained Per Loan Agreements |  | $ 35,000,000.0 |  | $ 35,000,000.0 |  |  |  |  |  |  |  |  |
Parent Company [Member] | Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, principal amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 125,000,000.0
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 5.00%
Proceeds from Convertible Debt | $ 104,600,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Carrying Amount of Equity Component |  |  |  |  |  |  |  |  |  |  |  |  | $ 16,100,000
Parent Company [Member] | Convertible Debt [Member] | Convertible Senior Notes due 2023 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Common Class A [Member] | Teekay Tankers | Revolving Credit Facilities due through 2024 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Collateral, Equity Interest in Subsidiaries, Number of Common Shares/Units | shares |  | 5.0 |  | 5.0 |  |  | 5.0 | 5.0 |  |  |  |  |
FPSO | Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Collateral, Number of Vessels | vessel |  | 1 |  | 1 |  |  | 1 | 1 |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  | 195.00% |  | 195.00% |  |  | 195.00% | 195.00% |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  | 135.00% |  | 135.00% |  |  | 135.00% | 135.00% |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  | 289.00% |  | 289.00% |  |  | 289.00% | 289.00% |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  | 125.00% |  | 125.00% |  |  | 125.00% | 125.00% |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt3 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  | 170.00% |  | 170.00% |  |  | 170.00% | 170.00% |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  | 125.00% |  | 125.00% |  |  | 125.00% | 125.00% |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt4 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  | 145.00% |  | 145.00% |  |  | 145.00% | 145.00% |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  | 120.00% |  | 120.00% |  |  | 120.00% | 120.00% |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt5 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  | 148.00% |  | 148.00% |  |  | 148.00% | 148.00% |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  | 120.00% |  | 120.00% |  |  | 120.00% | 120.00% |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt6 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  | 400.00% |  | 400.00% |  |  | 400.00% | 400.00% |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  | 115.00% |  | 115.00% |  |  | 115.00% | 115.00% |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt7 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  | 137.00% |  | 137.00% |  |  | 137.00% | 137.00% |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  | 110.00% |  | 110.00% |  |  | 110.00% | 110.00% |  |  |  |  |

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- Definition Debt Collateral, Equity Interest in Subsidiaries, Number of Common Shares/Units + References No definition available. + Details
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- Definition The minimum free liquidity and undrawn revolving credit line required by covenants of certain debt currently held by the Company, as a percentage of total debt. + References No definition available. + Details
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- Definition Debt Instrument, Collateral, Number of Vessels + References No definition available. + Details
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- Definition Line Of Credit Reduction Of Available Borrowing Capacity in Year One + References No definition available. + Details
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- Definition Line Of Credit Reduction Of Available Borrowing Capacity In Year Three + References No definition available. + Details
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