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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of gain (loss) from deconsolidation of subsidiary and derecognition of group of assets constituting transfer of business or nonprofit activity, excluding conveyance of oil and gas mineral rights and transfer of good or service in contract with customer.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

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The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Deconsolidation of Teekay Offshore - Narrative (Details) shares in Millions					1 Months Ended	5 Months Ended	9 Months Ended	12 Months Ended			19 Months Ended
	May 08, 2019 USD ($)	May 08, 2019 USD ($)	Jan. 01, 2018 company	Sep. 25, 2017 USD ($)	Jul. 31, 2018 shares	Dec. 31, 2018	Sep. 24, 2017	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	May 07, 2019
Business Acquisition [Line Items]
Proceeds from sale of equity-accounted investments and related assets								$ 100,000,000	$ 81,823,000	$ 0
Equity method investment, ownership interest								100.00%
Fair Value Discounted Cash Flow Discount Rate				10.00%
Net Income (Loss) Attributable to Noncontrolling Interest								$ 161,591,000	21,490,000	(365,796,000)
Number of Entities Transferred \| company			7
Loss on deconsolidation of Altera (note 4)								0	(7,070,000)	(104,788,000)
Subsidiaries
Business Acquisition [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest								$ 161,591,000	$ 21,490,000	(365,796,000)
Teekay Offshore
Business Acquisition [Line Items]
Investment in Teekay Offshore				$ 150,100,000
Teekay Offshore
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent				50.00%
Due from Affiliate, Noncurrent	$ 25,000,000	$ 25,000,000
Common Units \| Teekay Offshore
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent						13.80%		0.00%	13.80%
Equity method investment, ownership interest				14.00%
General Partner \| Brookfield
Business Acquisition [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest						51.00%
General Partner \| Teekay
Business Acquisition [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest					2.00%	49.00%
General Partner \| Teekay Offshore
Business Acquisition [Line Items]
Interest of Company's general partner							100.00%
Equity method investment, ownership interest				51.00%
Brookfield \| General Partner
Business Acquisition [Line Items]
Percentage of ownership acquired				49.00%
Teekay \| Teekay Offshore
Business Acquisition [Line Items]
Number of warrants to be issued (in shares) \| shares					1.0
Teekay Offshore
Business Acquisition [Line Items]
Proceeds from sale of equity-accounted investments and related assets	100,000,000
Due from Affiliate, Noncurrent	$ 25,000,000	$ 25,000,000
Net Income (Loss) Attributable to Noncontrolling Interest										(337,272,000)
Loss on deconsolidation of Altera (note 4)				$ (104,788,000)
Teekay Offshore \| Deferred Gain (Loss) on Sale of Assets \| Subsidiaries
Business Acquisition [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest										$ 349,600,000
Teekay Offshore \| General Partner
Business Acquisition [Line Items]
Investment in Teekay Offshore				$ 150,132,000
Transferred Subsidiaries
Business Acquisition [Line Items]
Loss on deconsolidation of Altera (note 4)									$ 7,070,000
Disposed of by sale \| Transferred Subsidiaries \| Teekay Offshore
Business Acquisition [Line Items]
Ownership percentage			100.00%
General Partner \| Teekay Offshore
Business Acquisition [Line Items]
Interest of Company's general partner		49.00%								2.00%	49.00%