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
-Sentence Column A

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Number of board members to elect per preferred share

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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.

+ References

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=6382943&loc=d3e33918-111571

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

+ References

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 210.5-02.28)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

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Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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Investments - Tanker Investments Ltd - Additional Information (Detail) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2014 shares	Dec. 31, 2016 USD ($) member shares	Dec. 31, 2015 USD ($)
Net Investment Income [Line Items]
Preferred stock, share issued (in shares)		0
Percentage of combined ownership interest		100.00%	17.62%
Teekay and Teekay Tankers [Member]
Net Investment Income [Line Items]
Combined interest of shares held in investment owned		19.55%	17.62%
Tanker Investments Limited [Member] \| Series A- One Preferred Stock [Member]
Net Investment Income [Line Items]
Preferred stock, share issued (in shares)	1
Tanker Investments Limited [Member] \| Series A- Two Preferred Stock [Member]
Net Investment Income [Line Items]
Preferred stock, share issued (in shares)	1
Tanker Investments Limited [Member] \| Warrant [Member] \| Derivatives Not Designated as a Cash Flow Hedge [Member]
Net Investment Income [Line Items]
Derivatives not designated as a cash flow hedge \| $		$ 0.6	$ 10.3
Tanker Investments Limited [Member] \| Teekay Tankers [Member]
Net Investment Income [Line Items]
Number of board members \| member		1
Tanker Investments Limited [Member] \| Teekay Tankers [Member] \| Warrant [Member]
Net Investment Income [Line Items]
Number of shares available through exercise of stock purchase warrant	1,500,000
Tanker Investments Limited [Member] \| Teekay and Teekay Tankers [Member]
Net Investment Income [Line Items]
Percentage of combined ownership interest	20.00%