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Long-Term Debt - Summary of Long-Term Debt (Detail) $ / shares in Units, € in Millions, shares in Millions |  | 1 Months Ended | 6 Months Ended |  |  |  |  |
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Jan. 31, 2018 USD ($) | Nov. 30, 2015 USD ($) | Jun. 30, 2020 USD ($) subsidiary shares vessel SecurityLoan term_loan | Jun. 30, 2020 NOK (kr) subsidiary shares vessel SecurityLoan term_loan | Jun. 30, 2020 EUR (€) subsidiary shares vessel SecurityLoan term_loan | Dec. 31, 2019 USD ($) vessel | Dec. 31, 2019 NOK (kr) vessel | Dec. 31, 2019 EUR (€) vessel | May 31, 2019 USD ($) | Jan. 26, 2018 USD ($) $ / shares | Jan. 27, 2010 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Weighted Average Interest Rate, at Point in Time |  |  | 3.70% | 3.70% | 3.70% | 4.60% | 4.60% | 4.60% |  |  |
Total principal |  |  | $ 2,265,986,000 |  |  | $ 2,867,120,000 |  |  |  |  |
Less unamortized discount and debt issuance costs |  |  | (40,499,000) |  |  | (39,968,000) |  |  |  |  |
Total debt |  |  | 2,225,487,000 |  |  | 2,827,152,000 |  |  |  |  |
Less current portion |  |  | (322,831,000) |  |  | (523,312,000) |  |  |  |  |
Long-term portion |  |  | 1,902,656,000 |  |  | 2,303,840,000 |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year |  |  | 83,100,000 |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two |  |  | 416,400,000 |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Three |  |  | 634,400,000 |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Four |  |  | 402,900,000 |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five |  |  | 303,400,000 |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal after Year Five |  |  | $ 425,800,000 |  |  |  |  |  |  |  |
Number Of Loan Agreements | SecurityLoan |  |  | 4 | 4 | 4 |  |  |  |  |  |
Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total principal |  |  | $ 1,000,000,000.0 |  |  | $ 1,300,000,000 |  |  |  |  |
Number Of Debt Instruments | term_loan |  |  | 6 |  |  |  |  |  |  |  |
Number Of Debt Instruments With Balloon Or Bullet Payments | term_loan |  |  | 5 | 5 | 5 |  |  |  |  |  |
Number Of Vessels Held As Collateral | vessel |  |  | 20 | 20 | 20 | 24 | 24 | 24 |  |  |
Senior Notes (8.5%) due January 15, 2020 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage Of Par At Which Notes Sold |  | 99.00% |  |  |  |  |  |  |  |  |
Long-term debt, percentage bearing fixed interest, percentage rate |  | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% | 8.50% |  |  | 8.50%
Total principal |  |  | $ 0 |  |  | $ 36,712,000 |  |  |  |  |
Debt instrument, principal amount |  | $ 200,000,000 |  |  |  |  |  |  |  |  | $ 450,000,000
Senior Notes due 2022 [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% |  |
Total principal |  |  | $ 250,000,000 |  |  | $ 250,000,000 |  |  |  |  |
Debt instrument, principal amount |  |  |  |  |  |  |  |  | $ 250,000,000.0 |  |
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% |  |  |
Total principal |  |  | $ 125,000,000 |  |  | $ 125,000,000 |  |  |  |  |
Norwegian Krone-denominated Bonds due through August 2023 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total principal |  |  | 212,985,000 |  |  | 347,163,000 |  |  |  |  |
U.S. Dollar-denominated Term Loans due through 2030 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total principal |  |  | 1,002,761,000 |  |  | 1,336,437,000 |  |  |  |  |
Euro-denominated Term Loans due through 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total principal |  |  | 153,200,000 |  |  | 165,376,000 |  |  |  |  |
Other U.S. Dollar-denominated loan |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total principal |  |  | 446,000 |  |  | 3,300,000 |  |  |  |  |
Revolving Credit Facilities |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | 950,800,000 |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  | $ 429,200,000 |  |  |  |  |  |  |  |
Number Of Credit Facilities | term_loan |  |  | 4 | 4 | 4 |  |  |  |  |  |
Line Of Credit Reduction Of Available Borrowing Capacity In Year Four |  |  | $ 65,300,000 |  |  |  |  |  |  |  |
Total principal |  |  | 521,594,000 |  |  | 603,132,000 |  |  |  |  |
Line Of Credit Reduction Of Available Borrowing Capacity Remainder Of Fiscal Year |  |  | 157,600,000 |  |  |  |  |  |  |  |
Line Of Credit Reduction Of Available Borrowing Capacity In Year Two |  |  | 115,800,000 |  |  |  |  |  |  |  |
Line Of Credit Reduction Of Available Borrowing Capacity In Year Three |  |  | $ 410,800,000 |  |  |  |  |  |  |  |
Debt Instrument, Collateral, Number of Vessels | vessel |  |  | 33 | 33 | 33 |  |  |  |  |  |
Revolving Credit Facilities | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 150,000,000 |  |  |  |  |  |  |  |
Remaining Term Loans [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.47% | 4.47% | 4.47% |  |  |  |  |  |
Term Loan One [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Minimum Level Of Free Cash Maintained Per Loan Agreements |  |  | $ 100,000,000.0 |  |  |  |  |  |  |  |
Convertible Senior Notes due 2023 [Member] | 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 |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Undrawn Revolving Credit Facilities Time To Maturity |  |  | 6 months |  |  |  |  |  |  |  |
Minimum [Member] | Revolving Credit Facilities |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 1.40% |  |  |  |  |  |  |  |
Minimum [Member] | Term Loan One [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt |  |  | 7.50% | 7.50% | 7.50% |  |  |  |  |  |
Maximum | Revolving Credit Facilities |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 3.95% |  |  |  |  |  |  |  |
Teekay LNG |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Minimum Level Of Free Cash Maintained Per Loan Agreements |  |  | $ 35,000,000.0 |  |  |  |  |  |  |  |
Teekay LNG | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  | $ 153,200,000 |  | € 136.4 | 165,400,000 |  | € 147.5 |  |  |
Debt Instrument, Collateral, Number of Vessels | vessel |  |  | 2 | 2 | 2 |  |  |  |  |  |
Number Of Debt Instruments | term_loan |  |  | 2 |  |  |  |  |  |  |  |
Number of Subsidiaries | subsidiary |  |  | 1 | 1 | 1 |  |  |  |  |  |
Teekay LNG | Common Class A [Member] | Revolving Credit Facilities |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Collateral, Equity Interest in Subsidiaries, Number of Common Shares/Units | shares |  |  | 25.2 | 25.2 | 25.2 |  |  |  |  |  |
Teekay LNG | Minimum [Member] | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 0.60% |  |  |  |  |  |  |  |
Teekay LNG | Maximum | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 1.95% |  |  |  |  |  |  |  |
Teekay Tankers [Member] | 2016 Debt Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line |  |  | $ 35,000,000.0 |  |  |  |  |  |  |  |
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt |  |  | 5.00% | 5.00% | 5.00% |  |  |  |  |  |
Teekay Tankers [Member] | Common Class A [Member] | Revolving Credit Facilities |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Collateral, Equity Interest in Subsidiaries, Number of Common Shares/Units | shares |  |  | 5.0 | 5.0 | 5.0 |  |  |  |  |  |
Teekay Tankers [Member] | Minimum [Member] | 2016 Debt Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  | 6 months |  |  |  |  |  |  |  |
Parent Company [Member] | Convertible Senior Notes due 2023 [Member] | Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Convertible Debt | $ 104,600,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, principal amount |  |  |  |  |  |  |  |  |  | $ 125,000,000.0 |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  | 5.00% |
Debt Instrument, Convertible Term | 5 years |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Carrying Amount of Equity Component |  |  |  |  |  |  |  |  |  | $ 16,100,000 |
Nibor Loan [Member] | Teekay LNG | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, principal amount | kr |  |  |  | kr 2,100,000,000 |  |  |  |  |  |  |
Unsecured Debt | kr |  |  |  | kr 2,100,000,000 |  |  | kr 3,100,000,000 |  |  |  |
Senior Notes |  |  | $ 213,000,000.0 |  |  | $ 347,200,000 |  |  |  |  |
Derivative, Notional Amount |  |  | $ 248,500,000 |  |  |  |  |  |  |  |
Nibor Loan [Member] | Teekay LNG | Minimum [Member] | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 4.60% |  |  |  |  |  |  |  |
Derivative, Fixed Interest Rate |  |  | 7.72% | 7.72% | 7.72% |  |  |  |  |  |
Nibor Loan [Member] | Teekay LNG | Maximum | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 6.00% |  |  |  |  |  |  |  |
Derivative, Fixed Interest Rate |  |  | 7.89% | 7.89% | 7.89% |  |  |  |  |  |
Fixed Rate [Member] | Remaining Term Loans [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number Of Debt Instruments | term_loan |  |  | 2 |  |  |  |  |  |  |  |
Three Month London Interbank Offered Rate [Member] | Minimum [Member] | Remaining Term Loans [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 0.30% |  |  |  |  |  |  |  |
Three Month London Interbank Offered Rate [Member] | Maximum | Remaining Term Loans [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 3.25% |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Period One [Member] | Senior Notes due 2022 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 100.00% |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Period Two [Member] | Senior Notes due 2022 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 104.625% |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Period Three [Member] | Senior Notes due 2022 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 102.313% |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Period Four [Member] | Senior Notes due 2022 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 100.00% |  |  |  |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt1 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  |  | 379.00% | 379.00% | 379.00% |  |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  |  | 125.00% | 125.00% | 125.00% |  |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt2 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  |  | 218.00% | 218.00% | 218.00% |  |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  |  | 115.00% | 115.00% | 115.00% |  |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt3 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  |  | 138.00% | 138.00% | 138.00% |  |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  |  | 120.00% | 120.00% | 120.00% |  |  |  |  |  |
Transportation Equipment [Member] | Long Term Debt4 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Vessel Market Value To Loan Ratio |  |  | 192.00% | 192.00% | 192.00% |  |  |  |  |  |
Vessel Market Value to Loan Required Ratio |  |  | 135.00% | 135.00% | 135.00% |  |  |  |  |  |

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- Definition The minimum liquidity required by covenants of certain debt currently held by the company. Liquidity is defined as cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity. + 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 Free liquidity and undrawn revolving credit line as percentage of debt. + References No definition available. + Details
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- Definition Number of debt instruments with balloon or bullet payments. + References No definition available. + Details
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