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Long-Term Debt - Additional Information - Other (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) SecurityLoan term_loan | Dec. 31, 2017 USD ($)
Debt Instrument [Line Items] |  |
Interest at a weighted-average fixed rate | 5.10% | 4.30%
Long term debt principal repayments, 2019 | $ 200,000,000 |
Long term debt principal repayments, 2020 | 1,200,000,000 |
Long term debt principal repayments, 2021 | 900,000,000 |
Long term debt principal repayments, 2022 | 200,000,000 |
Long term debt principal repayments, 2023 | 300,000,000 |
Long term debt principal repayments thereafter | $ 600,000,000 |
Number of loan agreements | SecurityLoan | 5 |
Minimum |  |
Debt Instrument [Line Items] |  |
Vessel market value to loan ratio | 131.70% |
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 | 197.80% |
Vessel market value to loan minimum required ratio | 135.00% |
Secured debt |  |
Debt Instrument [Line Items] |  |
Number of debt instruments | term_loan | 11 |
Teekay Tankers |  |
Debt Instrument [Line Items] |  |
Minimum level of free cash be maintained as per loan agreements | $ 35,000,000.0 |
Teekay Tankers | Minimum |  |
Debt Instrument [Line Items] |  |
Free liquidity and undrawn revolving credit line as percentage of debt | 5.00% |
Teekay Tankers | Long-term Debt |  |
Debt Instrument [Line Items] |  |
Debt guaranteed | $ 166,400,000 |
Teekay Tankers | Teekay Parent | Long-term Debt |  |
Debt Instrument [Line Items] |  |
Debt guaranteed | 166,400,000 | $ 252,700,000
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% |
Term Loan Two |  |
Debt Instrument [Line Items] |  |
Minimum level of free cash be maintained as per loan agreements | $ 50,000,000.0 |
Term Loan Two | Minimum |  |
Debt Instrument [Line Items] |  |
Free liquidity and undrawn revolving credit line as percentage of debt | 5.00% |
Fixed Rate | Term Loan One | Secured debt |  |
Debt Instrument [Line Items] |  |
Number of debt instruments | term_loan | 1 |
Fixed Rate | Remaining Term Loans | Secured debt |  |
Debt Instrument [Line Items] |  |
Number of debt instruments | term_loan | 2 |

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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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