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Summary of Significant Accounting Policies - Narrative (Detail) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 25, 2017 | Jun. 30, 2016 | Dec. 31, 2016 USD ($) ExtensionOption vote Tanker component partner $ / shares | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2017 | Nov. 30, 2013 vessel
Vessels and equipment |  |  |  |  |  |  |
Depreciation and amortization |  |  | $ 571,825 | $ 509,500 | $ 422,904 |  |
Amortization of vessels accounted for as capital leases |  |  | 12,800 | 5,400 | 21,600 |  |
Number of tankers | vessel |  |  |  |  |  |  | 5
Decrease in net income attributable to shareholders of Teekay Corporation |  |  | 123,182 | (82,151) | 54,757 |  |
Interest costs capitalized to vessels and equipment |  |  | 36,900 | 22,000 | 51,300 |  |
Asset retirement obligation |  |  |  |  |  |  |
Asset retirement obligation |  |  | 44,700 | 25,500 |  |  |
Other non-current assets |  |  | $ 190,699 | 232,776 |  |  |
Units for Maintenance and Safety [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 35 years |  |  |  |
Long Distance Towing and Offshore Installation [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 25 years |  |  |  |
Asset retirement obligation [Member] |  |  |  |  |  |  |
Asset retirement obligation |  |  |  |  |  |  |
Other non-current assets |  |  | $ 27,900 | 6,900 |  |  |
Oil Tanker [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 25 years |  |  |  |
Liquefied Natural Gas [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 35 years |  |  |  |
Liquefied Petroleum Gas [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 30 years |  |  |  |
Excluding amortization of Drydocking expenditure [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Depreciation and amortization |  |  | $ 492,000 | $ 445,200 | 341,500 |  |
Randgrid Shuttle Tanker [Member] |  |  |  |  |  |  |
Asset retirement obligation |  |  |  |  |  |  |
Operating lease arrangement period, lessor |  |  | 3 years |  |  |  |
Number of extension options | ExtensionOption |  |  | 12 |  |  |  |
Additional fixed rate time charter contract period |  |  | 1 year |  |  |  |
Maximum [Member] | FPSO [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 25 years |  |  |  |
Maximum [Member] | Dry-docking activity [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 5 years |  |  |  |
Minimum [Member] | FPSO [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 20 years |  |  |  |
Minimum [Member] | Dry-docking activity [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 2 years 6 months |  |  |  |
Service Life [Member] | Restatement Adjustment [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Decrease in net income attributable to shareholders of Teekay Corporation |  |  | $ 8,600 |  |  |  |
Earnings per share, basic and diluted (dollars per share) | $ / shares |  |  | $ 0.10 |  |  |  |
Service Life [Member] | Restatement Adjustment [Member] | Vessels [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Depreciation and amortization |  |  | $ 29,300 |  |  |  |
Shuttle Tankers [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Number of components in segment | component |  |  | 2 |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Number of components in segment | component |  |  | 2 |  |  |  |
Public Subsidiaries [Member] | Maximum [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Ownership percentage |  |  | 50.00% |  |  |  |
Teekay LNG [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Ownership percentage |  |  | 33.10% | 33.10% |  |  |
Vessels and equipment |  |  |  |  |  |  |
Decrease in net income attributable to shareholders of Teekay Corporation |  |  | $ (46,743) | $ (81,911) | (88,262) |  |
Teekay LNG [Member] | Preferred Unitholders [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Joint venture ownership percentage |  |  | 100.00% |  |  |  |
Teekay LNG [Member] | General Partner [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Interest of Company's general partner |  |  | 2.00% |  |  |  |
Teekay Offshore [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Ownership percentage |  |  | 29.00% | 37.00% |  |  |
Number of components in segment | component |  |  | 2 |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Number of components in segment | component |  |  | 2 |  |  |  |
Decrease in net income attributable to shareholders of Teekay Corporation |  |  | $ 8,751 | $ (31,501) | (10,259) |  |
Teekay Offshore [Member] | Shuttle Tankers [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Property, plant and equipment, useful life |  |  | 20 years | 25 years |  |  |
Teekay Offshore [Member] | Series D Preferred Stock [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Ownership percentage |  |  | 26.00% |  |  |  |
Preferred units dividend rate |  | 10.50% | 10.50% |  |  |  |
Joint venture ownership percentage |  |  | 74.00% |  |  |  |
Teekay Offshore [Member] | Preferred Unitholders [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Joint venture ownership percentage |  |  | 100.00% |  |  |  |
Teekay Offshore [Member] | Shuttle Tankers [Member] |  |  |  |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Number of tankers | Tanker |  |  | 8 |  |  |  |
Average age |  |  | 17 years |  |  |  |
Teekay Offshore [Member] | General Partner [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Interest of Company's general partner |  |  | 2.00% |  |  |  |
Teekay Tankers [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Ownership percentage |  |  | 25.40% | 25.90% |  |  |
Common stock number of votes per share | vote |  |  | 5 |  |  |  |
Vessels and equipment |  |  |  |  |  |  |
Decrease in net income attributable to shareholders of Teekay Corporation |  |  | $ (14,820) | $ (47,202) | $ (16,094) |  |
Teekay Tankers [Member] | Class B [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Common Stock, maximum voting power |  |  | 49.00% |  |  |  |
Gp Of Teekay Lng and Teekay Offshore [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Ownership percentage |  |  | 100.00% |  |  |  |
Teekay Offshore and Teekay Lng [Member] | General Partner [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Number of partners | partner |  |  | 1 |  |  |  |
Subsequent Events [Member] | Brookfield Business Partners L.P. [Member] | General Partner [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Percentage of ownership acquired | 49.00% |  |  |  |  |  |
Subsequent Events [Member] | Teekay Offshore [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 50.00% |
Subsequent Events [Member] | Teekay Offshore [Member] | General Partner [Member] |  |  |  |  |  |  |
Basis of presentation and Non-Controlling Interests |  |  |  |  |  |  |
Interest of Company's general partner | 100.00% |  |  |  |  |  |

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