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Obligations Related to Finance Leases - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended | 36 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 USD ($) vessel | Dec. 31, 2019 USD ($) vessel | Sep. 30, 2019 vessel | May 31, 2019 USD ($) | Jan. 31, 2019 | Nov. 30, 2018 USD ($) vessel | Sep. 30, 2018 USD ($) vessel | Jul. 31, 2017 USD ($) vessel | Dec. 31, 2019 USD ($) vessel | Dec. 31, 2019 USD ($) vessel lease lessor | Dec. 31, 2018 USD ($) lease | Dec. 31, 2017 USD ($) | Jan. 31, 2019
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from financing related to sale-leaseback of vessels | $ |  |  |  |  |  |  |  |  |  | $ 381,526,000 | $ 611,388,000 | $ 809,935,000 |
Teekay Tankers |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Finance Lease, Weighted Average Discount Rate, Percent | 7.50% | 7.64% |  |  |  |  |  |  | 7.64% | 7.64% | 7.50% |  |
Teekay Tankers | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Lease Terms |  |  |  |  |  |  |  | 9 |  |  |  |  |
Teekay Tankers | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Lease Terms |  |  |  |  |  |  |  | 12 |  |  |  |  |
Teekay Tankers | Suezmax, Aframax and LR2 Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  |  |  |  | 16 |  |  |
Approximate capital leases future minimum payments due | $ | $ 557,100,000 | $ 601,700,000 |  |  |  |  |  |  | $ 601,700,000 | $ 601,700,000 | $ 557,100,000 |  |
Finance Lease, Liability, Undiscounted Excess Amount | $ | $ 181,800,000 | $ 186,900,000 |  |  |  |  |  |  | $ 186,900,000 | $ 186,900,000 | $ 181,800,000 |  |
Teekay Tankers | Aframax Tanker [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Vessels Obligated to Purchase |  | 6 |  |  |  |  |  |  | 6 | 6 |  |  |
Teekay Tankers | Suezmax |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  | 2 |  |  |  |  |  |  | 1 |  |  |  |
Number Of Vessels Obligated to Purchase |  |  | 2 |  |  |  |  |  |  |  |  |  |
Finance Lease Obligations [Member] | Teekay Tankers | Suezmax, Aframax and LR2 Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Lessors | lessor |  |  |  |  |  |  |  |  |  | 16 |  |  |
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line | $ |  | $ 35,000,000.0 |  |  |  |  |  |  | $ 35,000,000.0 | $ 35,000,000.0 |  |  |
Percentage of debt |  | 5.00% |  |  |  |  |  |  | 5.00% | 5.00% |  |  |
Finance Lease Obligations [Member] | Teekay Tankers | Suezmax, Aframax and LR2 Vessels [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  |  |  |  |  | 6 months |  |  |
LNG Carriers | Teekay LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Failed Sales Number Of Vessels |  |  |  |  |  |  |  |  |  | 2 |  |  |
May 2019 Sale Leaseback [Member] | Teekay Tankers | Suezmax |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Actual hull coverage ratio | 0.00% | 109.00% |  |  |  |  |  |  | 109.00% | 109.00% | 0.00% |  |
Minimum hull coverage ratio, year 2 |  |  |  |  |  |  |  |  |  | 78.00% |  |  |
Minimum hull coverage ratio, years 3 and 4 |  |  |  |  |  |  |  |  |  | 80.00% |  |  |
Minimum hull coverage ratio, thereafter |  |  |  |  |  |  |  |  |  | 90.00% |  |  |
Minimum hull coverage ratio |  |  |  |  |  |  |  |  |  | 75.00% |  |  |
May 2019 Sale Leaseback [Member] | Finance Lease Obligations [Member] | Teekay Tankers | Suezmax |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  |  |  |  | 2 |  |  |
November 2018 Sale-leaseback Transaction | Teekay Tankers |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from financing related to sale-leaseback of vessels | $ |  |  |  |  |  | $ 84,700,000 |  |  |  |  |  |  |
November 2018 Sale-leaseback Transaction | Teekay Tankers | Suezmax, Aframax and LR2 Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Actual hull coverage ratio | 122.00% | 158.00% |  |  |  |  |  |  | 158.00% | 158.00% | 122.00% |  |
Minimum hull coverage ratio |  |  |  |  |  |  |  |  |  | 100.00% |  |  |
November 2018 Sale-leaseback Transaction | Teekay Tankers | LR2 Tanker |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  | 1 |  |  |  |  |  |  |
November 2018 Sale-leaseback Transaction | Teekay Tankers | Aframax Tanker [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  | 2 |  |  |  |  |  |  |
November 2018 Sale-leaseback Transaction | Teekay Tankers | Suezmax |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  | 1 |  |  |  |  |  |  |
November 2018 Sale-leaseback Transaction | Finance Lease Obligations [Member] | Teekay Tankers |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  | 4 |  |  |  |  |  |  |
November 2018 Sale-leaseback Transaction | Finance Lease Obligations [Member] | Teekay Tankers | Suezmax, Aframax and LR2 Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  |  |  |  | 4 |  |  |
September 2018 Sale Leaseback [Member] | Teekay Tankers | Aframax Tanker [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  | 6 |  |  |  |  |  |
Proceeds from financing related to sale-leaseback of vessels | $ |  |  |  |  |  |  | $ 156,600,000 |  |  |  |  |  |
Actual hull coverage ratio | 91.00% | 115.00% |  |  |  |  |  |  | 115.00% | 115.00% | 91.00% |  |
Minimum hull coverage ratio, year 1 |  |  |  |  |  |  |  |  |  | 78.00% |  |  |
Minimum hull coverage ratio, year 2 |  |  |  |  |  |  |  |  |  | 78.00% |  |  |
Minimum hull coverage ratio, years 3 and 4 |  |  |  |  |  |  |  |  |  | 80.00% |  |  |
Minimum hull coverage ratio, thereafter |  |  |  |  |  |  |  |  |  | 90.00% |  |  |
September 2018 Sale Leaseback [Member] | Finance Lease Obligations [Member] | Teekay Tankers | Aframax Tanker [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  |  |  |  | 6 |  |  |
July 2017 Sale Leaseback [Member] | Teekay Tankers | Suezmax |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  |  | 4 |  |  |  |  |
Proceeds from financing related to sale-leaseback of vessels | $ |  |  |  |  |  |  |  | $ 153,000,000 |  |  |  |  |
Actual hull coverage ratio | 101.00% | 122.00% |  |  |  |  |  |  | 122.00% | 122.00% | 101.00% |  |
Minimum hull coverage ratio, thereafter |  |  |  |  |  |  |  |  |  | 100.00% |  |  |
Hull coverage ratio for first three years |  |  |  |  |  |  |  |  |  | 90.00% |  |  |
July 2017 Sale Leaseback [Member] | Finance Lease Obligations [Member] | Teekay Tankers |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Period Required to Maintain 90% Hull Coverage Ratio |  |  |  |  |  |  |  |  |  | 3 years |  |  |
July 2017 Sale Leaseback [Member] | Finance Lease Obligations [Member] | Teekay Tankers | Suezmax |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  |  |  |  | 4 |  |  |
Option to Purchase July 2020 and November 2021 to End of Term [Member] | Teekay Tankers | Suezmax, Aframax and LR2 Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  |  |  |  | 16 |  |  |
Suezmax | May 2019 Sale Leaseback [Member] | Teekay Tankers |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | $ |  |  |  | 2 |  |  |  |  |  |  |  |  |
Proceeds from financing related to sale-leaseback of vessels | $ |  |  |  | $ 63,700,000 |  |  |  |  |  |  |  |  |
LNG Carriers | Teekay LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Imputed Interest Rate |  |  |  |  |  |  |  |  |  | 5.10% |  |  |
Number of Lessors | lessor |  |  |  |  |  |  |  |  |  | 9 |  |  |
LNG Carriers | Teekay LNG | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Lease Terms |  |  |  |  |  |  |  |  |  |  |  |  | P7Y6M
LNG Carriers | Teekay LNG | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Lease Terms |  |  |  |  |  |  |  |  |  |  |  |  | P15Y
Direct Finance Lease [Member] | Suezmax | Teekay LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | 1 |  |  |  |  |  |  |  |  |  |  |  |
Approximate capital leases future minimum payments due | $ | $ 24,200,000 |  |  |  |  |  |  |  |  |  | $ 24,200,000 |  |
Finance Lease, Liability, Undiscounted Excess Amount | $ | 200,000 |  |  |  |  |  |  |  |  |  | $ 200,000 |  |
Sales-type lease [Member] | LNG Carriers | Teekay LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels | lease |  |  |  |  |  |  |  |  |  | 9 | 8 |  |
Approximate capital leases future minimum payments due | $ | 1,700,000,000 | $ 1,900,000,000 |  |  |  |  |  |  | $ 1,900,000,000 | $ 1,900,000,000 | $ 1,700,000,000 |  |
Finance Lease, Liability, Undiscounted Excess Amount | $ | $ 435,300,000 | $ 470,900,000 |  |  |  |  |  |  | $ 470,900,000 | $ 470,900,000 | $ 435,300,000 |  |
Variable Interest Entity, Primary Beneficiary [Member] | Teekay Tankers | Suezmax, Aframax and LR2 Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Lessors | lessor |  |  |  |  |  |  |  |  |  | 14 |  |  |
Yamal Spirit [Member] | January 2019 Transaction [Member] | Teekay LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Lease Terms |  |  |  |  | P15Y |  |  |  |  |  |  |  |
Lessee, Finance Lease, Option to Extend |  |  |  |  | P5Y |  |  |  |  |  |  |  |
Torben Spirit [Member] | September 2019 Transaction [Member] | Teekay LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale Leaseback Transaction, Lease Terms |  |  | P7Y6M |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Contract Termination | $ |  |  |  |  |  |  |  |  |  | $ 1,400,000 |  |  |
Variable Interest Entity, Primary Beneficiary [Member] | Sales-type lease [Member] | Teekay LNG |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Lessors | lessor |  |  |  |  |  |  |  |  |  | 7 |  |  |

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