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The minimum free liquidity and undrawn revolving credit line required by covenants of certain debt currently held by the Company, as a percentage of total debt.

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The minimum hull coverage ratio as required by certain covenants for debts held by the Company.

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Debt Covenant Minimum Hull Coverage Ratio, Years 1, 2 and 3

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Debt Covenant Minimum Hull Coverage Ratio, Years 3 and 4

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Failed Sales Number Of Vessels

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Number of vessels under sales-type lease repurchased.

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Lessee, Sales-type lease, Purchase option price

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Number Of Sale Leaseback Transactions

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Number of Lessors

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of lessee's undiscounted obligation for lease payments for finance lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.

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Weighted average discount rate for finance lease calculated at point in time.

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Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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Amount of cash inflow before closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in financing activities.

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Obligations Related to Finance Leases - Additional Information (Detail)	1 Months Ended			12 Months Ended			36 Months Ended
	Nov. 30, 2020 USD ($)	Oct. 31, 2020 USD ($)	Sep. 30, 2019	Dec. 31, 2020 USD ($) vessel lessor lease	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 31, 2019	Mar. 10, 2021 USD ($) vessel	Nov. 13, 2020 vessel	Oct. 22, 2020 vessel
Capital Leased Assets [Line Items]
Proceeds from financing related to sale-leaseback of vessels				$ 0	$ 381,526,000	$ 611,388,000
Payments to Acquire Property, Plant, and Equipment				$ 26,507,000	109,523,000	$ 693,792,000
Finance Leased Assets, Number of Units \| vessel				22
Teekay Tankers
Capital Leased Assets [Line Items]
Approximate capital leases future minimum payments due				$ 480,900,000	601,700,000
Finance Lease, Liability, Undiscounted Excess Amount				$ 120,900,000	$ 186,900,000
Finance Lease, Weighted Average Discount Rate, Percent				7.80%	7.60%
Payments to Acquire Property, Plant, and Equipment	$ 56,700,000	$ 29,600,000
Lessee, Sales-type lease, Number of vessels repurchased \| vessel										2
Number Of Sale Leaseback Transactions \| vessel				16
Lessee, Sales-type lease, Number of purchase options exercised \| vessel									2
Teekay Tankers \| Subsequent Events
Capital Leased Assets [Line Items]
Lessee, Sales-type lease, Number of purchase options exercised \| vessel								6
Lessee, Sales-type lease, Purchase option price								$ 128,800,000
Teekay Tankers \| Finance Lease Obligations [Member]
Capital Leased Assets [Line Items]
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line				$ 35,000,000.0
Percentage of debt				5.00%
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 \| Aframax Tanker [Member] \| Subsequent Events
Capital Leased Assets [Line Items]
Lessee, Sales-type lease, Purchase option price								$ 128,800,000
May 2019 Sale Leaseback [Member] \| Teekay Tankers
Capital Leased Assets [Line Items]
Actual hull coverage ratio				81.00%	109.00%
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%
Finance Leased Assets, Number of Units \| vessel				2
November 2018 Sale-leaseback Transaction \| Teekay Tankers \| Minimum
Capital Leased Assets [Line Items]
Actual hull coverage ratio				145.00%	140.00%
November 2018 Sale-leaseback Transaction \| Teekay Tankers \| Maximum
Capital Leased Assets [Line Items]
Actual hull coverage ratio				156.00%	144.00%
September 2018 Sale Leaseback [Member] \| Teekay Tankers
Capital Leased Assets [Line Items]
Minimum hull coverage ratio, year 1				75.00%
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] \| Teekay Tankers \| Finance Lease Obligations [Member]
Capital Leased Assets [Line Items]
Number of vessels \| vessel				6
September 2018 Sale Leaseback [Member] \| Teekay Tankers \| Minimum
Capital Leased Assets [Line Items]
Actual hull coverage ratio				80.00%	106.00%
September 2018 Sale Leaseback [Member] \| Teekay Tankers \| Maximum
Capital Leased Assets [Line Items]
Actual hull coverage ratio				88.00%	123.00%
July 2017 Sale Leaseback [Member] \| Teekay Tankers
Capital Leased Assets [Line Items]
Hull coverage ratio for first three years				90.00%
July 2017 Sale Leaseback [Member] \| Teekay Tankers \| Finance Lease Obligations [Member]
Capital Leased Assets [Line Items]
Finance Leased Assets, Number of Units \| vessel				4
July 2017 Sale Leaseback [Member] \| Teekay Tankers \| Minimum
Capital Leased Assets [Line Items]
Actual hull coverage ratio				121.00%	110.00%
July 2017 Sale Leaseback [Member] \| Teekay Tankers \| Maximum
Capital Leased Assets [Line Items]
Actual hull coverage ratio				143.00%	132.00%
July 2017 Sale Leaseback [Member] \| Teekay Tankers \| Suezmax
Capital Leased Assets [Line Items]
Minimum hull coverage ratio, thereafter				100.00%
July 2017 and November 2018 Sale Leaseback \| Teekay Tankers \| Finance Lease Obligations [Member]
Capital Leased Assets [Line Items]
Number of vessels \| vessel				6
September 2018 and May 2019 Sale Leaseback \| Teekay Tankers \| Finance Lease Obligations [Member]
Capital Leased Assets [Line Items]
Number of vessels \| vessel				8
LNG Carriers \| Teekay LNG
Capital Leased Assets [Line Items]
Sale Leaseback Transaction, Imputed Interest Rate				5.10%
LNG Carriers \| Teekay LNG \| Minimum
Capital Leased Assets [Line Items]
Sale Leaseback Transaction, Lease Terms							7.5
LNG Carriers \| Teekay LNG \| Maximum
Capital Leased Assets [Line Items]
Sale Leaseback Transaction, Lease Terms							15
Sales-type lease [Member] \| Teekay Tankers
Capital Leased Assets [Line Items]
Number of Lessors \| lessor				14
Sales-type lease [Member] \| LNG Carriers \| Teekay LNG
Capital Leased Assets [Line Items]
Number of vessels \| lease				9
Number of Lessors \| lessor				9
Failed Sales Number Of Vessels				2
Approximate capital leases future minimum payments due				$ 1,700,000,000
Finance Lease, Liability, Undiscounted Excess Amount				$ 400,500,000
Variable Interest Entity, Primary Beneficiary [Member] \| Sales-type lease [Member] \| Teekay Tankers
Capital Leased Assets [Line Items]
Number of Lessors \| lessor				12
Torben Spirit [Member] \| September 2019 Transaction [Member] \| Teekay LNG
Capital Leased Assets [Line Items]
Sale Leaseback Transaction, Lease Terms			7.5
Loss on lease extinguishment				$ 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