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Long-Term Debt - Additional Information - Revolvers (Detail) - Revolving Credit Facilities shares in Millions | 12 Months Ended |
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Dec. 31, 2018 USD ($) term_loan vessel shares | Dec. 31, 2017 | Mar. 31, 2018 USD ($)
Debt Instrument [Line Items] |  |  |
Number of credit facilities | term_loan | 5 |  |
Credit facility, maximum borrowing capacity | $ 900,000,000 |  |
Undrawn amount of revolving credit facility | 300,000,000 |  |
Available capacity reduced under revolving credit facility in 2019 | 39,200,000 |  |
Available capacity reduced under revolving credit facility in 2020 | 378,400,000 |  |
Available capacity reduced under revolving credit facility in 2021 | 333,900,000 |  |
Available capacity reduced under revolving credit facility in 2022 | $ 192,000,000 |  |
Number of vessels | vessel | 38 |  |
Secured debt |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility, maximum borrowing capacity | $ 150,000,000 |  |
Teekay Offshore |  |  |
Debt Instrument [Line Items] |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 100,000,000.0
Teekay Offshore | Class A |  |  |
Debt Instrument [Line Items] |  |  |
Number of other securities collateralized by first-priority mortgages (in shares) | shares | 56.6 |  |
Teekay LNG | Class A |  |  |
Debt Instrument [Line Items] |  |  |
Number of other securities collateralized by first-priority mortgages (in shares) | shares | 25.2 |  |
Teekay Tankers | Class A |  |  |
Debt Instrument [Line Items] |  |  |
Number of other securities collateralized by first-priority mortgages (in shares) | shares | 40.3 |  |
Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument spread on variable rate | 1.40% | 0.45% |
Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument spread on variable rate | 3.95% | 4.00% |

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