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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
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-Section 55
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-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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Gross number of share options (or share units) granted during the period.

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

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Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Capital Stock - Share-based Compensation of Subsidiaries (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016
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)			100,000
Stock options granted (in shares)			731,405	916,015
Stock option per share value (in usd per share)			$ 10.18	$ 9.44
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)			343,330	238,609
Vesting period			3 years
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Teekay Offshore \| 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)	321,318	601,368
Teekay Offshore \| 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)			56,950	76,084
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)	60,809	132,582
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)			17,345	32,723
Teekay Tankers \| Restricted stock units \| Class A common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares or units granted equity based compensation awards (in shares)	382,437	279,980
Teekay Tankers \| Non-management directors \| Class A common stock
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)			0	9,358
Teekay Tankers \| Non-management directors \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	396,412
Teekay Tankers \| Officer \| Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years	3 years
Stock options granted (in shares)	486,329	216,043
Stock option per share value (in usd per share)	$ 2.23	$ 3.74
Maximum contractual term	10 years	10 years
Teekay Offshore Teekay Lng And Teekay Tankers \| Restricted stock and phantom share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units aggregate value, granted	$ 3.5	$ 4.9
Vesting period			3 years
Teekay Offshore Teekay Lng And Teekay Tankers \| Non-management directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units aggregate value, granted			$ 0.6	$ 0.7