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Deconsolidation of Teekay Offshore - Schedule of Deconsolidation (Details) - USD ($) $ in Thousands |  | 12 Months Ended
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Sep. 25, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Noncontrolling Interest [Line Items] |  |  |  |
Carrying value of the non-controlling interest in Altera |  |  |  | $ 881,830
Loss on deconsolidation of Altera |  | $ 0 | $ (7,070) | $ (104,788)
Teekay Offshore |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Proceeds from Divestiture of Businesses and Interests in Affiliates | $ 139,693 |  |  |
Fair value of vessel charters with Altera (notes 6 and 7) | 14,812 |  |  |
Carrying value of the non-controlling interest in Altera | 1,138,275 |  |  |
Subtotal | 1,479,508 |  |  |
Carrying value of Altera's net assets on deconsolidation | (1,584,296) |  |  |
Loss on deconsolidation of Altera | (104,788) |  |  |
Teekay Offshore | Stock Purchase Warrants |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Fair value of warrants (note 16) | 36,596 |  |  |
Teekay Offshore | General Partner |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Fair value of common units and general partner interest of Altera | $ 150,132 |  |  |

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