Loss Per Share - Schedule of Loss Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net (loss) income attributable to shareholders of Teekay Corporation	$ (54,757)us-gaap_NetIncomeLoss	$ (114,738)us-gaap_NetIncomeLoss	$ (160,180)us-gaap_NetIncomeLoss
Weighted average number of common shares	72,066,008	70,457,968	69,263,369
Dilutive effect of stock-based compensation	0	0	0
Common stock and common stock equivalents	72,066,008	70,457,968	69,263,369
(Loss) income per common share:
Basic	$ (0.76)us-gaap_EarningsPerShareBasic	$ (1.63)us-gaap_EarningsPerShareBasic	$ (2.31)us-gaap_EarningsPerShareBasic
Diluted	$ (0.76)us-gaap_EarningsPerShareDiluted	$ (1.63)us-gaap_EarningsPerShareDiluted	$ (2.31)us-gaap_EarningsPerShareDiluted

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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