Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
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Carriers Volume

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The noncurrent portion, due in greater than one year or one operating cycle, if longer, of liabilities resulting from the transfer of a business segment under contractual arrangement.

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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The minimum amount the entity agreed to spend under the long-term purchase commitment.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Investments - Teekay LNG - BG International Limited Joint Venture - Additional Information (Detail) m³ in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	Jun. 30, 2014 USD ($) vessel m³	Dec. 31, 2016 USD ($) vessel	Dec. 31, 2015 USD ($)	Nov. 30, 2013 vessel
Net Investment Income [Line Items]
Number of vessels \| vessel				5
Equity method investment, ownership interest		100.00%	17.62%
Newbuildings [Member]
Net Investment Income [Line Items]
Expected cost of project		$ 3,000.0
Teekay LNG [Member] \| Newbuildings [Member] \| Shipbuilding supervision and crew training services [Member]
Net Investment Income [Line Items]
Value of service obligation		$ 22.6	$ 29.7
Teekay LNG [Member] \| BG Joint Venture [Member] \| Newbuildings [Member]
Net Investment Income [Line Items]
Number of vessels \| vessel		4
Teekay LNG [Member] \| BG Joint Venture [Member] \| Newbuildings [Member] \| Shipbuilding supervision and crew training services [Member]
Net Investment Income [Line Items]
Number of vessels \| vessel	4	4
Volume of vessels \| m³	174
Expected cost of project	$ 1,000.0
Value of service obligation	33.3
Amounts due	20.3	$ 10.9	$ 16.5
Teekay LNG [Member] \| BG Joint Venture [Member] \| Newbuildings [Member] \| Shipbuilding supervision and crew training services [Member] \| Fair Value Asset (Liability) [Member]
Net Investment Income [Line Items]
Value of service obligation	36.9
Amounts due	$ 16.5
Teekay LNG [Member] \| BG Joint Venture [Member] \| Newbuildings [Member] \| Shipbuilding supervision and crew training services [Member] \| 30% Ownership [Member]
Net Investment Income [Line Items]
Equity method investment, ownership interest	30.00%
Teekay LNG [Member] \| BG Joint Venture [Member] \| Newbuildings [Member] \| Shipbuilding supervision and crew training services [Member] \| 20% Ownership [Member]
Net Investment Income [Line Items]
Number of vessels \| vessel	2
Equity method investment, ownership interest	20.00%