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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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The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence.

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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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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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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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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Related Party Tranactions Related Party Transactions (Details)			1 Months Ended			3 Months Ended		4 Months Ended	6 Months Ended
	May 08, 2019 USD ($) vessel	Jan. 01, 2018 Subsidiaries	May 31, 2019 USD ($)	May 08, 2019 USD ($)	Sep. 30, 2018	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	May 08, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Mar. 31, 2018 USD ($)
Related Party Transaction [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest	49.00%
Proceeds from sale of equity-accounted investments and related assets (note 4)									$ 100,000,000	$ 54,438,000
Loss on deconsolidation of Teekay Offshore (note 4)						$ 0	$ 0		0	(7,070,000)
Teekay Lng Marubeni Joint Venture [Member] \| Time-Charter Hire Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party						3,100,000			8,700,000
Additional Time Period For Fixed Rate Time Charters Contract					2 years
Technical Services [Member] \| Teekay Offshore [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party								$ 9,600,000
Teekay Offshore [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties				$ 2,300,000			4,500,000	7,600,000		11,100,000
Due from Related Parties											$ 83,100,000
Due to Related Parties											$ 59,300,000
Teekay Offshore [Member] \| Technical Services [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party				3,300,000			6,800,000			13,300,000
Teekay Offshore [Member] \| Time-Charter Hire Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party				6,100,000			14,000,000	20,800,000		28,000,000
LNG Carriers [Member] \| Equity Method Investee [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties						$ 16,800,000	$ 13,100,000		$ 32,600,000	$ 25,700,000
Shuttle Tankers \| Teekay Offshore [Member]
Related Party Transaction [Line Items]
Number Of Vessels \| vessel	2
FSO \| Teekay Offshore [Member]
Related Party Transaction [Line Items]
Number Of Vessels \| vessel	3
Teekay Lng Marubeni Joint Venture [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage						52.00%			52.00%
Teekay Offshore [Member]
Related Party Transaction [Line Items]
Due from Affiliate, Noncurrent	$ 25,000,000			$ 25,000,000				$ 25,000,000
Proceeds from sale of equity-accounted investments and related assets (note 4)	100,000,000		$ 100,000,000
Equity Method Investment, Other than Temporary Impairment									$ 64,900,000
Gain (Loss) on Sale of Equity Investments	$ 8,900,000
Teekay Offshore [Member] \| Brookfield Business Partners L.P. [Member]
Related Party Transaction [Line Items]
Percentage of ownership acquired		100.00%
Number of Subsidiaries \| Subsidiaries		7
Revolving Credit Facilities
Related Party Transaction [Line Items]
Credit facility, maximum borrowing capacity						$ 886,779,169			$ 886,779,169
Revolving Credit Facilities \| Teekay Offshore [Member]
Related Party Transaction [Line Items]
Credit facility, maximum borrowing capacity												$ 125,000,000
Revolving Credit Facilities \| Teekay Offshore [Member] \| Brookfield Business Partners L.P. [Member]
Related Party Transaction [Line Items]
Credit facility, maximum borrowing capacity												100,000,000
Parent Company [Member] \| Revolving Credit Facilities \| Teekay Offshore [Member]
Related Party Transaction [Line Items]
Credit facility, maximum borrowing capacity												$ 25,000,000