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Long-Term Debt - Additional Information - Revolvers (Detail) shares in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($) vessel term_loan shares | Dec. 31, 2016 USD ($) term_loan
Debt Instrument [Line Items] |  |
Carrying amount of long-term debt | $ 3,449,611,000 | $ 6,730,132,000
Secured debt |  |
Debt Instrument [Line Items] |  |
Carrying amount of long-term debt | $ 1,400,000,000 | 3,700,000,000
Teekay Offshore | Secured debt |  |
Debt Instrument [Line Items] |  |
Carrying amount of long-term debt |  | 2,200,000,000
Revolving Credit Facilities |  |
Debt Instrument [Line Items] |  |
Number of credit facilities | term_loan | 8 |
Credit facility, maximum borrowing capacity | $ 1,340,455,288 |
Undrawn amount of revolving credit facility | 461,400,000 |
Available capacity reduced under revolving credit facility in 2018 | 624,300,000 |
Available capacity reduced under revolving credit facility in 2019 | 52,600,000 |
Available capacity reduced under revolving credit facility in 2020 | 53,600,000 |
Available capacity reduced under revolving credit facility in 2021 | 347,300,000 |
Available capacity reduced under revolving credit facility, thereafter | $ 261,000,000 |
Number of vessels | vessel | 52 |
Carrying amount of long-term debt | $ 877,343,000 | $ 1,119,808,000
Revolving Credit Facilities | Secured debt |  |
Debt Instrument [Line Items] |  |
Credit facility, maximum borrowing capacity | $ 200,000,000 |
Revolving Credit Facilities | Teekay Offshore |  |
Debt Instrument [Line Items] |  |
Number of credit facilities | term_loan |  | 5
Carrying amount of long-term debt |  | $ 291,800,000
Revolving Credit Facilities | Teekay Offshore | Securities Pledged as Collateral | Common Stock |  |
Debt Instrument [Line Items] |  |
Number of other securities collateralized by first-priority mortgages (in shares) | shares | 38.2 |
Revolving Credit Facilities | Teekay LNG | Securities Pledged as Collateral | Common Stock |  |
Debt Instrument [Line Items] |  |
Number of other securities collateralized by first-priority mortgages (in shares) | shares | 25.2 |
Revolving Credit Facilities | Teekay Tankers | Securities Pledged as Collateral | Class A |  |
Debt Instrument [Line Items] |  |
Number of other securities collateralized by first-priority mortgages (in shares) | shares | 16.8 |
Revolving Credit Facilities | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument spread on variable rate | 0.45% | 0.45%
Revolving Credit Facilities | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument spread on variable rate | 4.00% | 4.00%

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