Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Name:	us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Segment Reporting - Narrative (Detail) $ in Thousands	1 Months Ended	3 Months Ended		4 Months Ended	6 Months Ended
Segment Reporting - Narrative (Detail) $ in Thousands	May 08, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	May 08, 2019 USD ($)	Jun. 30, 2019 USD ($) subsidiary segment	Jun. 30, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| segment					3
Number of lines of businesses, more than \| segment					1
Equity (loss) income (note 4) \| $		$ (6,284)	$ 837		$ (67,937)	$ 27,954
Teekay Offshore [Member]
Segment Reporting Information [Line Items]
Equity (loss) income (note 4) \| $	$ 0		$ (9,300)	$ (3,000)		$ (8,700)
Subsidiaries
Segment Reporting Information [Line Items]
Number of Subsidiaries \| subsidiary					2