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Segment Reporting - Revenue and Income from Vessel Operations by Segment - Intersegment revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ (1,815,672)	$ (1,945,391)	$ (1,728,488)
Operating Income (Loss)	314,579	204,042	164,319
Eliminations and other
Segment Reporting Information [Line Items]
Revenues	0	13,588	10,426
Operating Income (Loss)	0	0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	0	13,588	10,426
Teekay LNG Liquefied Gas Carriers, Teekay Tankers Conventional Tankers [Member] | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	0	(13,541)	(11,107)
Teekay Parent
Segment Reporting Information [Line Items]
Revenues	0	0	(345)
Operating Income (Loss)	(16,659)	(19,875)	(23,460)
Teekay LNG | Liquefied Gas Carriers | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	0	(11,562)	(9,418)
Teekay Tankers | Conventional Tankers | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 1,979	$ 1,689

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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