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Goodwill, Intangible Assets and In-Process Revenue Contracts - Carrying Amount of Goodwill for Company's Reportable Segment (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning balance	$ 176,630
Decrease due to deconsolidation of Teekay Offshore (Note 3)	(132,940)
Goodwill, Ending balance	43,690
Conventional Tanker Segment
Goodwill [Roll Forward]
Goodwill, Beginning balance	8,059
Decrease due to deconsolidation of Teekay Offshore (Note 3)	0
Goodwill, Ending balance	8,059
Teekay Offshore
Goodwill [Roll Forward]
Goodwill, Beginning balance	132,940
Decrease due to deconsolidation of Teekay Offshore (Note 3)	(132,940)
Goodwill, Ending balance	0
Teekay LNG | Liquefied Gas Segment
Goodwill [Roll Forward]
Goodwill, Beginning balance	35,631
Decrease due to deconsolidation of Teekay Offshore (Note 3)	0
Goodwill, Ending balance	$ 35,631

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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X

- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

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X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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X

- Details

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