Name:	tk_NumberOfDebtInstrumentsWithBalloonOrBulletPayments
Namespace Prefix:	tk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Subsidiaries As Debt Guarantor

+ References

No definition available.

+ Details

Name:	tk_NumberOfSubsidiariesAsDebtGuarantor
Namespace Prefix:	tk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Vessels

+ References

No definition available.

+ Details

Name:	tk_NumberOfVessels
Namespace Prefix:	tk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Long Term Time Charter Contracts

+ References

No definition available.

+ Details

Name:	tk_NumberofLongTermTimeCharterContracts
Namespace Prefix:	tk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30700-110894

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894

+ Details

Name:	us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=tk_EuroDenominatedTermLoansDueThroughTwoThousandTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=tk_TeekayLngMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=tk_EuroDenominatedTermLoansDueThroughTwoThousandTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=tk_EuroInterbankOfferedRateEuriborMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=tk_USDollarDenominatedTermLoansDueThroughTwoThousandThirtyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_USD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=tk_RemainingTermLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=tk_FixedRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=tk_TermLoanOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt - Additional Information - Term Loans (Detail) € in Thousands, $ in Thousands		12 Months Ended
	Feb. 05, 2021 USD ($)	Dec. 31, 2020 USD ($) term_loan vessel credit_facility contract	Dec. 31, 2019 USD ($) vessel	Dec. 31, 2018 USD ($)	Feb. 08, 2021 credit_facility	Dec. 31, 2020 EUR (€) vessel term_loan credit_facility	Dec. 31, 2019 EUR (€) vessel
Debt Instrument [Line Items]
Carrying amount of long-term debt		$ 2,087,083	$ 2,867,120
Unrealized foreign exchange gain (loss)		(20,718)	(13,574)	$ 6,140
Long-term Debt, Excluding Current Maturities		1,793,741	2,303,840
Current portion of long-term debt (note 8)		261,366	523,312
Euro-denominated Term Loans due through 2024
Debt Instrument [Line Items]
Carrying amount of long-term debt		$ 152,710	165,376
Euro-denominated Term Loans due through 2024 \| Teekay LNG
Debt Instrument [Line Items]
Number of debt instruments \| term_loan		2
Carrying amount of long-term debt		$ 152,700	165,400			€ 125,000	€ 147,500
Number of long term time charter contracts \| contract		2
Euro-denominated Term Loans due through 2024 \| Teekay LNG
Debt Instrument [Line Items]
Number of vessels \| vessel		2				2
Number of Subsidiaries As Debt Guarantor \| credit_facility		1				1
Euro-denominated Term Loans due through 2024 \| Euro Interbank Offered Rate Euribor [Member] \| Minimum \| Teekay LNG
Debt Instrument [Line Items]
Debt instrument spread on variable rate		0.60%
Euro-denominated Term Loans due through 2024 \| Euro Interbank Offered Rate Euribor [Member] \| Maximum \| Teekay LNG
Debt Instrument [Line Items]
Debt instrument spread on variable rate		1.95%
U.S. Dollar-denominated Term Loans due through 2030
Debt Instrument [Line Items]
Number of debt instruments \| term_loan		6
Carrying amount of long-term debt		$ 938,280	$ 1,336,437
Number of term loans which have balloon or bullet repayments \| term_loan		5				5
Number of vessels \| vessel		20	24			20	24
U.S. Dollar-denominated Term Loans due through 2030 \| United States of America, Dollars
Debt Instrument [Line Items]
Carrying amount of long-term debt		$ 938,300	$ 1,300,000
U.S. Dollar-denominated Term Loans due through 2030 \| Subsequent Events
Debt Instrument [Line Items]
Number of credit facilities \| credit_facility					1
Long-term Debt, Refinanced, Amount	$ 177,000
U.S. Dollar-denominated Term Loans due through 2030 \| Remaining Term Loans \| Fixed Rate
Debt Instrument [Line Items]
Number of debt instruments \| term_loan		1
U.S. Dollar-denominated Term Loans due through 2030 \| Remaining Term Loans \| LIBOR \| Minimum
Debt Instrument [Line Items]
Debt instrument spread on variable rate		0.30%
U.S. Dollar-denominated Term Loans due through 2030 \| Remaining Term Loans \| LIBOR \| Maximum
Debt Instrument [Line Items]
Debt instrument spread on variable rate		3.25%
U.S. Dollar-denominated Term Loans due through 2030 \| Term Loan One
Debt Instrument [Line Items]
Debt interest rate		4.26%				4.26%