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Long-Term Debt - Additional Information - Other (Detail) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) SecurityLoan credit_facility term_loan | May 31, 2019 | Dec. 31, 2018 USD ($) | Nov. 30, 2015 | Jan. 27, 2010
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Weighted Average Interest Rate, at Point in Time | 4.60% |  | 5.10% |  |
Long term debt principal repayments, 2019 | $ 500,000,000 |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Two | 600,000,000 |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Three | 600,000,000 |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Four | 400,000,000 |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five | 300,000,000 |  |  |  |
Long term debt principal repayments thereafter | $ 400,000,000 |  |  |  |
Number of loan agreements | SecurityLoan | 5 |  |  |  |
Short-term Debt | $ 50,000,000 |  | $ 0 |  |
Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Vessel market value to loan ratio | 138.00% |  |  |  |
Vessel market value to loan minimum required ratio | 115.00% |  |  |  |
Revolving credit lines maturity period (in months) | 6 months |  |  |  |
Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Vessel market value to loan ratio | 281.00% |  |  |  |
Vessel market value to loan minimum required ratio | 135.00% |  |  |  |
Convertible Senior Notes (5%) due January 15, 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 5.00% |  | 5.00% |  |
Secured debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Number of debt instruments | term_loan | 10 |  |  |  |
Senior Notes (8.5%) due January 15, 2020 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 8.50% |  | 8.50% | 8.50% |
Discount rate for redemption feature | 0.50% |  |  |  |
Senior Notes due 2022 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 9.25% | 9.25% |  |  |
Discount rate for redemption feature | 0.50% |  |  |  |
Teekay Parent | Convertible Senior Notes (5%) due January 15, 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 5.00% |  | 5.00% |  |
Teekay Parent | Senior Notes (8.5%) due January 15, 2020 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 8.50% |  | 8.50% |  | 8.50%
Teekay Parent | Senior Notes due 2022 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 9.25% | 9.25% |  |  |
Teekay Tankers |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Guaranteed | $ 145,000,000 |  |  |  |
Short-term Debt, Weighted Average Interest Rate, at Point in Time | 5.00% |  | 0.00% |  |
Short-term Debt | $ 50,000,000 |  | $ 0 |  |
Teekay Tankers | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt | 5.00% |  |  |  |
Teekay Tankers | Teekay Parent |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Guaranteed | $ 145,000,000 |  | $ 166,400,000 |  |
Teekay LNG |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Minimum level of free cash be maintained as per loan agreements | 35,000,000.0 |  |  |  |
Term Loan One |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Minimum level of free cash be maintained as per loan agreements | $ 100,000,000.0 |  |  |  |
Term Loan One | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt | 7.50% |  |  |  |
Remaining Secured Debt | Secured debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Number of debt instruments | credit_facility | 2 |  |  |  |
Term Loan Two |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Minimum level of free cash be maintained as per loan agreements | $ 50,000,000.0 |  |  |  |
2016 Debt Facility [Member] | Teekay Tankers |  |  |  |  |
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% |  |  |  |
2016 Debt Facility [Member] | Teekay Tankers | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Term | 6 months |  |  |  |
Fixed Rate | Remaining Term Loans | Secured debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Number of debt instruments | term_loan | 2 |  |  |  |

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