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Summary of Significant Accounting Policies - Net Income of Consolidated Partially-Owned Entities and Attribution of Net Income to Controlling and Non-controlling Interests (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | $ (365,796) | $ 209,846 | $ 323,309
Controlling Interest | (163,276) | (123,182) | 82,151
Net income | (529,072) | 86,664 | 405,460
Public Subsidiaries |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | (365,796) | 209,846 | 323,309
Public Subsidiaries | Non-public partially-owned subsidiaries |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 8,208 | 29,372 | 30,538
Public Subsidiaries | Distributed Earnings |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 46,786 | 72,132 | 240,453
Public Subsidiaries | Undistributed Earnings |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | (468,598) | 61,849 | 24,266
Public Subsidiaries | Preferred Unitholders |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 50,318 | 48,554 | 28,609
Teekay Offshore |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | (337,272) | 53,226 | 58,542
Controlling Interest | 340,014 | (8,751) | 31,501
Net income | 2,742 | 44,475 | 90,043
Teekay Offshore | Non-public partially-owned subsidiaries |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 8,262 | 11,858 | 13,911
Teekay Offshore | Distributed Earnings |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 16,312 | 41,688 | 119,971
Controlling Interest | 5,981 | 18,378 | 70,414
Teekay Offshore | Undistributed Earnings |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | (398,185) | (46,155) | (103,949)
Controlling Interest | 334,033 | (27,129) | (38,913)
Teekay Offshore | Preferred Unitholders |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 36,339 | 45,835 | 28,609
Teekay LNG |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 2,879 | 111,222 | 135,599
Controlling Interest | (3,968) | 46,743 | 81,911
Net income | (1,089) | 157,965 | 217,510
Teekay LNG | Non-public partially-owned subsidiaries |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | (54) | 17,514 | 16,627
Teekay LNG | Distributed Earnings |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 30,474 | 30,444 | 120,482
Controlling Interest | 15,027 | 15,026 | 82,791
Teekay LNG | Undistributed Earnings |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | (41,520) | 60,545 | (1,510)
Controlling Interest | (18,995) | 31,717 | (880)
Teekay LNG | Preferred Unitholders |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | 13,979 | 2,719 |
Teekay Tankers |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | (28,893) | 47,459 | 129,725
Controlling Interest | (30,434) | 15,396 | 47,202
Net income | (59,327) | 62,855 | 176,927
Teekay Tankers | Undistributed Earnings |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | (28,893) | 47,459 | 129,725
Controlling Interest | (30,434) | 15,396 | 47,202
Other Entities and Eliminations |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |
Net income (loss) attributable to non-controlling interests | $ (2,510) | $ (2,061) | $ (557)

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