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Summary of Significant Accounting Policies - Accounting Pronouncements (Details) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) vessel | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | May 08, 2019 USD ($) | Jan. 01, 2019 USD ($) | Jan. 01, 2018 USD ($) | Dec. 31, 2016 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Revenues | $ 1,945,391,000 | $ 1,728,488,000 | $ 1,880,332,000 |  |  |  |
Vessel operating expenses | 644,445,000 | 637,474,000 | 731,150,000 |  |  |  |
Direct financing lease payments received | $ 17,073,000 | 0 | 0 |  |  |  |
Finance Leased Assets, Number of Units | vessel | 22 |  |  |  |  |  |
Accounts receivable | $ (199,957,000) | (174,031,000) |  |  |  |  |
Operating Lease, Right-of-Use Asset | 159,638,000 | 0 |  |  |  |  |
Foreign exchange (loss) gain (notes 9 and 16) | (13,574,000) | 6,140,000 | (26,463,000) |  |  |  |
Decrease to opening equity | (2,571,593,000) | (2,867,028,000) | (2,879,656,000) |  |  |  | $ (4,089,293,000)
Net operating cash flow | (383,306,000) | (182,135,000) | (544,264,000) |  |  |  |
Accumulated other comprehensive loss (note 1) | (23,737,000) | (2,273,000) |  |  |  |  |
Investments in subsidiaries | 1,173,728,000 | 1,193,741,000 |  |  |  |  |
Voyage expenses | 423,677,000 | 409,617,000 | 153,766,000 |  |  |  |
Accounting Standards Update 2014-09 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Change in accounting policy |  |  |  |  |  | $ 0 |
Prepaid expenses and other |  | 20,200,000 |  |  |  |  |
Accounting Standards Update 2016-02 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Direct financing lease payments received | 17,100,000 | 10,900,000 |  |  |  |  |
Operating Lease, Right-of-Use Asset | 148,600,000 |  |  |  | $ 170,000,000 |  |
Lease liability | 148,600,000 |  |  |  | 170,000,000 |  |
Foreign exchange (loss) gain (notes 9 and 16) | 200,000 |  |  |  |  |  |
Investments in subsidiaries | 100,000 |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets | 100,000 |  |  |  | 100,000 |  |
Accounting Standards Update 2017-12 [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |  |  |  |  | 1,600,000 |  |
Teekay Offshore |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Due from Affiliate, Noncurrent |  |  |  | $ 25,000,000 |  |  |
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 |  |  |  |  |
Voyage charters |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Revenues | 917,954,000 | 710,441,000 | 169,344,000 |  |  |  |
Voyage charters | Accounting Standards Update 2014-09 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Revenues |  | 292,600,000 |  |  |  |  |
Voyage expenses |  | (292,600,000) |  |  |  |  |
Reimbursable voyage costs [Member] | Accounting Standards Update 2014-09 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Revenues |  | 20,700,000 |  |  |  |  |
Voyage expenses |  | 20,700,000 |  |  |  |  |
Vessels [Member] | Accounting Standards Update 2014-09 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Revenues |  | (82,900,000) |  |  |  |  |
Voyage expenses |  | 82,900,000 |  |  |  |  |
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 |  |  |  |  |
Time-charter [Member] | Accounting Standards Update 2016-02 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  |  | 13,700,000 |  |
Office Building [Member] | Accounting Standards Update 2016-02 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Lease liability | 13,900,000 |  |  |  |  |  |
Time-charter [Member] | Accounting Standards Update 2016-02 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  |  | 900,000 |  |
Other Noncurrent Assets [Member] | Office Building [Member] | Accounting Standards Update 2016-02 |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Operating Lease, Right-of-Use Asset | 13,700,000 |  |  |  |  |  |
AOCI Atrributable to Parent [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive loss (note 1) | $ (23,737,000) | $ (2,273,000) | $ (5,995,000) |  |  |  | $ (10,603,000)
AOCI Atrributable to Parent [Member] | Accounting Standards Update 2017-12 [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive loss (note 1) |  |  |  |  | $ 1,600,000 |  |

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