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Partners' Capital and Distributions - Preferred Unit Distributions (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 14, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Partners Capital and Distribution [Line Items] |  |  |  |
Number of days after end of quarter within which distributions must be paid to unitholders |  | 45 days |  |
Cash Distribution | Series A Preferred Units |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |
Preferred unit dividends |  | $ 149 | $ 149 | $ 149
Cash Distribution | Series B Preferred Units |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |
Preferred unit dividends |  | 49 | $ 49 | $ 49
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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