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Acquisitions, Divestitures and Other Transactions - Partners' Capital (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2021 | Dec. 31, 2021
Business Acquisition [Line Items] |  |
Plains Oryx Permian Basin LLC joint venture formation (Note 7) |  | $ 3,256
Noncontrolling Interests |  |
Business Acquisition [Line Items] |  |
Plains Oryx Permian Basin LLC joint venture formation (Note 7) |  | 2,651
Partners’ Capital Excluding Noncontrolling Interests |  |
Business Acquisition [Line Items] |  |
Plains Oryx Permian Basin LLC joint venture formation (Note 7) |  | $ 605
Joint Venture Transaction | Plains Oryx Permian Basin LLC (Permian JV) |  |
Business Acquisition [Line Items] |  |
Members' Equity | $ 7,575 |
Plains Oryx Permian Basin LLC (Permian JV) | Joint Venture Transaction | Noncontrolling Interests | Oryx Midstream Holdings LLC |  |
Business Acquisition [Line Items] |  |
Plains Oryx Permian Basin LLC joint venture formation (Note 7) | 2,651 |
Plains Oryx Permian Basin LLC (Permian JV) | Joint Venture Transaction | Partners’ Capital Excluding Noncontrolling Interests |  |
Business Acquisition [Line Items] |  |
Plains Oryx Permian Basin LLC joint venture formation (Note 7) | 605 |
Plains Oryx Permian Basin LLC (Permian JV) | Oryx Midstream Holdings LLC | Joint Venture Transaction |  |
Business Acquisition [Line Items] |  |
Plains Oryx Permian Basin LLC joint venture formation (Note 7) | $ 3,256 |

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