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Summary of Significant Accounting Policies - Accounting Pronouncements (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2019 | Jan. 01, 2018 | Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Revenues | $ 1,707,758,000 | $ 1,880,332,000 | $ 2,328,569,000 |  |  |
Voyage expenses | 388,887,000 | 153,766,000 | 138,339,000 |  |  |
Vessel operating expenses | 637,474,000 | 731,150,000 | 825,024,000 |  |  |
Change in accounting policy |  |  |  |  | $ 4,657,000 |
Accounts receivable | (174,031,000) | (159,859,000) |  |  |  |
Decrease to opening equity | (2,867,028,000) | (2,879,656,000) | (4,089,293,000) |  |  | $ (3,701,074,000)
Net operating cash flow | (182,135,000) | (544,264,000) | (676,546,000) |  |  |
Accounting Standards Update 2014-09 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Voyage expenses | 292,600,000 |  |  |  |  |
Vessel operating expenses | 82,900,000 |  |  |  |  |
Change in accounting policy |  |  |  |  | 0 |
Prepaid expenses and other | 20,200,000 |  |  |  |  |
Accounts receivable | 20,200,000 |  |  |  |  |
Accounting Standards Update 2016-15 | Restatement Adjustment |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Net operating cash flow |  | 25,700,000 | 41,700,000 |  |  |
Teekay Tankers | Accounting Standards Update 2014-09 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Increase in revenue from contract with customer | 82,900,000 |  |  |  |  |
Pre-operational costs | Accounting Standards Update 2014-09 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Change in accounting policy | 5,700,000 |  |  |  | 4,100,000 |
Increase in Prepaid Expenses and Other | 3,500,000 |  |  |  |  |
Increase in Investments in and Advance to Joint Ventures | 2,200,000 |  |  |  |  |
Non-lease |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Revenues | 228,354,000 | $ 166,250,000 | $ 153,394,000 |  |  |
Non-lease | Accounting Standards Update 2014-09 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Change in accounting policy |  |  |  |  | $ 0 |
Increase in revenue from contract with customer | $ 0 |  |  |  |  |
Subsequent Events | Accounting Standards Update 2016-02 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Change in accounting policy |  |  |  | $ 3,000,000 |  |
Lease liability |  |  |  | 170,000,000 |  |
Subsequent Events | Charters-in | Accounting Standards Update 2016-02 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Right-of-use asset |  |  |  | 13,700,000 |  |
Subsequent Events | Charters-in | Accounting Standards Update 2016-02 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Right-of-use asset |  |  |  | $ 900,000 |  |

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