Maximum term of the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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 (a)(2)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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- Definition

Gross number of share options (or share units) granted during the period.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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- Definition

Value, before forfeiture, of shares granted under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Number, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

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Capital Stock - Share-based Compensation of Subsidiaries (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	9 Months Ended
	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)		2,646,903	1,048,916
Stock option per share value (in usd per share)		$ 3.98	$ 8.67
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares or units granted equity based compensation awards (in shares)		796,733	625,878
Vesting period		3 years
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Teekay LNG \| Phantom unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares or units granted equity based compensation awards (in shares)		80,100	62,283
Teekay LNG \| Non-management directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares or units issued related to the exercise of share based compensation during the period (in shares)		35,419	17,498
Teekay Tankers [Member] \| Restricted stock units \| Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares or units granted equity based compensation awards (in shares)		633,134	762,640
Teekay Tankers [Member] \| Non-management directors \| Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares or units issued related to the exercise of share based compensation during the period (in shares)		159,375	168,029
Teekay Tankers [Member] \| Non-management directors \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	504,097		470,765
Teekay Tankers [Member] \| Officer \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock options granted (in shares)	736,327	1,380,173
Stock option per share value (in usd per share)	$ 1.22		$ 1.00
Maximum contractual term	10 years
Teekay LNG and Teekay Tankers [Member] \| Restricted Stock And Phantom Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units aggregate value, granted		$ 1.8	$ 2.1
Teekay LNG and Teekay Tankers [Member] \| Non-management directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units aggregate value, granted		$ 0.7	$ 0.5
Teekay Offshore Teekay Lng And Teekay Tankers \| Restricted Stock And Phantom Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years