The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
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_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(iii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(2)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=tk_RangeOfExercisePricesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=tk_RangeOfExercisePricesOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=tk_RangeOfExercisePricesTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=tk_RangeOfExercisePricesThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=tk_RangeOfExercisePricesFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=tk_RangeOfExercisePricesFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=tk_RangeOfExercisePricesSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=tk_RangeOfExercisePricesSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Capital Stock - Details Regarding Outstanding and Exercisable Stock Options (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of Outstanding Options (in shares)	5,971,000
Outstanding Options, Weighted-Average Remaining Life (Years)	7 years 3 months 12 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 10.88	$ 15.54	$ 22.96	$ 29.16
Number of Exercisable Options (in shares)	2,565,000
Exercisable Options, Weighted-Average Remaining Life (Years)	5 years 2 months 29 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 18.25	$ 21.35	$ 29.76
Range Of Exercise Prices [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (USD per share)	0
Range of Exercise Prices, upper limit (USD per share)	$ 4.99
Number of Outstanding Options (in shares)	2,496,000
Outstanding Options, Weighted-Average Remaining Life (Years)	9 years 2 months 23 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 3.98
Number of Exercisable Options (in shares)	0
Exercisable Options, Weighted-Average Remaining Life (Years)	0 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 0.00
Range Of Exercise Prices One [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (USD per share)	5.00
Range of Exercise Prices, upper limit (USD per share)	$ 9.99
Number of Outstanding Options (in shares)	1,788,000
Outstanding Options, Weighted-Average Remaining Life (Years)	7 years 3 months 23 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 9.00
Number of Exercisable Options (in shares)	1,108,000
Exercisable Options, Weighted-Average Remaining Life (Years)	6 years 8 months 31 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 9.20
Range Of Exercise Prices Two [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (USD per share)	10.00
Range of Exercise Prices, upper limit (USD per share)	$ 19.99
Number of Outstanding Options (in shares)	693,000
Outstanding Options, Weighted-Average Remaining Life (Years)	7 years 2 months 24 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 10.18
Number of Exercisable Options (in shares)	462,000
Exercisable Options, Weighted-Average Remaining Life (Years)	7 years 2 months 19 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 10.18
Range Of Exercise Prices Three [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (USD per share)	20.00
Range of Exercise Prices, upper limit (USD per share)	$ 24.99
Number of Outstanding Options (in shares)	280,000
Outstanding Options, Weighted-Average Remaining Life (Years)	2 months 7 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 24.42
Number of Exercisable Options (in shares)	280,000
Exercisable Options, Weighted-Average Remaining Life (Years)	2 months 9 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 24.42
Range Of Exercise Prices Four [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (USD per share)	25.00
Range of Exercise Prices, upper limit (USD per share)	$ 29.99
Number of Outstanding Options (in shares)	348,000
Outstanding Options, Weighted-Average Remaining Life (Years)	2 years 2 months 5 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 27.69
Number of Exercisable Options (in shares)	349,000
Exercisable Options, Weighted-Average Remaining Life (Years)	2 years 2 months 5 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 27.69
Range Of Exercise Prices Five [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (USD per share)	30.00
Range of Exercise Prices, upper limit (USD per share)	$ 34.99
Number of Outstanding Options (in shares)	94,000
Outstanding Options, Weighted-Average Remaining Life (Years)	2 years 4 months 13 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 34.42
Number of Exercisable Options (in shares)	94,000
Exercisable Options, Weighted-Average Remaining Life (Years)	2 years 4 months 13 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 34.42
Range Of Exercise Prices Six [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (USD per share)	40.00
Range of Exercise Prices, upper limit (USD per share)	$ 44.99
Number of Outstanding Options (in shares)	257,000
Outstanding Options, Weighted-Average Remaining Life (Years)	5 years 2 months 9 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 43.99
Number of Exercisable Options (in shares)	257,000
Exercisable Options, Weighted-Average Remaining Life (Years)	5 years 2 months 9 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 43.99
Range Of Exercise Prices Seven [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (USD per share)	50.00
Range of Exercise Prices, upper limit (USD per share)	$ 59.99
Number of Outstanding Options (in shares)	15,000
Outstanding Options, Weighted-Average Remaining Life (Years)	4 years 2 months 11 days
Outstanding Options, Weighted-Average Exercise Price (dollars per share)	$ 56.76
Number of Exercisable Options (in shares)	15,000
Exercisable Options, Weighted-Average Remaining Life (Years)	4 years 2 months 12 days
Exercisable Options, Weighted-Average Exercise Price (dollars per share)	$ 56.76