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Asset Impairments and Loss on Sales of Vessels, Equipment and Other Operating Assets - Additional Information - Asset Impairments (Detail)	1 Months Ended		3 Months Ended		12 Months Ended
	Sep. 30, 2017 vessel	Aug. 31, 2017	Dec. 31, 2015 vessel	Mar. 31, 2015 vessel	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) vessel	Dec. 31, 2015 USD ($) vessel
Property, Plant and Equipment [Line Items]
Write down on vessel					$ 232,659,000	$ 45,796,000	$ 67,744,000
Total vessels and equipment					5,208,544,000	9,138,886,000
Petrojarl Foinaven FPSO
Property, Plant and Equipment [Line Items]
Number of vessels | vessel	2
Write down on vessel					113,000,000
Petrojarl Banff FPSO
Property, Plant and Equipment [Line Items]
Write down on vessel					$ 205,700,000
Petrojarl Foinaven and Banff FPSO
Property, Plant and Equipment [Line Items]
Discount rate					10.00%
Teekay LNG | Teide Spirit and Toledo Spirit
Property, Plant and Equipment [Line Items]
Write down on vessel					$ 25,500,000
Cancellation option period		13 years
Teekay Offshore
Property, Plant and Equipment [Line Items]
Discount rate					10.00%
Teekay Offshore | Offshore Logistics | Impaired Asset | 1990-built Shuttle Tankers | Cost Approach Valuation Technique | Operating Segments
Property, Plant and Equipment [Line Items]
Number of vessels | vessel			5
Teekay Offshore | Offshore Logistics | Impaired Asset | 1990-built Shuttle Tankers | Discontinued Operations, Held-for-sale | Cost Approach Valuation Technique | Operating Segments
Property, Plant and Equipment [Line Items]
Number of vessels | vessel				1			7
Teekay Offshore | Units for Maintenance and Safety
Property, Plant and Equipment [Line Items]
Write down on vessel						$ 43,700,000
Teekay Offshore | Units for Maintenance and Safety | Impaired Asset
Property, Plant and Equipment [Line Items]
Number of vessels | vessel						2
Total vessels and equipment						$ 0
Teekay Offshore | Five Shuttle Tankers | 1990-built Shuttle Tankers
Property, Plant and Equipment [Line Items]
Estimated useful life							17 years 6 months
Teekay Offshore | Seven Shuttle Tankers | 1990-built Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write down on vessel							$ 66,700,000
Teekay Offshore | Navion Marita | Offshore Logistics
Property, Plant and Equipment [Line Items]
Write down on vessel						$ 2,100,000

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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