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v3.19.3.a.u2

Partners' Capital and Distributions - Preferred Unit Distributions (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Feb. 14, 2020 | Nov. 15, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Partners Capital and Distribution [Line Items] |  |  |  |  |
Number of days after end of quarter within which distributions must be paid to unitholders |  |  | 45 days |  |
Series B Preferred Units |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Dividends paid (in dollars per unit) |  | $ 5.9549 |  |  |
Cash Distribution | Series A Preferred Units |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Preferred unit dividends |  |  | $ 149 | $ 112 |
Cash Distribution | Series B Preferred Units |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Preferred unit dividends |  |  | 49 | $ 49 | $ 5
Unit Distribution | Series A Preferred Units |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Unit distributions (in units) |  |  |  | 1,393,926 | 5,307,689
Distributions paid to unitholders |  |  |  | $ 37 | $ 139
Other current liabilities | Series B Preferred Units |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Dividends payable |  |  | $ 6 |  |
Other current liabilities | Subsequent Event | Cash Distribution | Series A Preferred Units |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Preferred unit dividends | $ 37 |  |  |  |

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