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Partners' Capital and Distributions - Noncontrolling Interests in Subsidiaries (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 30, 2022 | Oct. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2023
Plains Oryx Permian Basin LLC | Joint Venture Transaction |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Partners’ capital, excluding noncontrolling interests |  |  | $ (26) | $ 3,256 |
Plains Oryx Permian Basin LLC | Noncontrolling Interests | Joint Venture Transaction |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Partners’ capital, excluding noncontrolling interests |  |  | (16) | 2,651 |
Plains Oryx Permian Basin LLC | Noncontrolling Interests | Joint Venture Transaction | Oryx Midstream Holdings LLC |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Noncontrolling interest, increase from business combination |  | $ 2,635 |  |  |
Plains Oryx Permian Basin LLC | Partners’ Capital Excluding Noncontrolling Interests | Joint Venture Transaction |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Partners’ capital, excluding noncontrolling interests |  | 595 | (10) | $ 605 |
Cactus II Pipeline LLC |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Additional interest acquired (as a percent) | 5.00% |  |  |  |
Business combination, step acquisition, equity interest in acquiree, including subsequent acquisition (as a percent) | 70.00% |  |  |  |
Partners’ capital, excluding noncontrolling interests |  |  | 526 |  |
Cactus II Pipeline LLC | Noncontrolling Interests |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Noncontrolling interest, increase from business combination | $ 526 |  |  |  |
Partners’ capital, excluding noncontrolling interests |  |  | $ 526 |  |
Oryx Midstream Holdings LLC | Plains Oryx Permian Basin LLC | Joint Venture Transaction |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Partners’ capital, excluding noncontrolling interests |  | $ 3,230 |  |  |
Plains Oryx Permian Basin LLC |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Noncontrolling interest, ownership (as a percent) |  |  |  |  | 35.00%
Plains Oryx Permian Basin LLC | Oryx Midstream Holdings LLC | Joint Venture Transaction |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Noncontrolling interest, ownership (as a percent) |  | 35.00% |  |  |
Noncontrolling interest, ownership (as a parent) |  | 65.00% |  |  |
Cactus II Pipeline LLC |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Noncontrolling interest, ownership (as a percent) |  |  |  |  | 30.00%
Cactus II Pipeline LLC | Enbridge |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Noncontrolling interest, ownership (as a percent) | 30.00% |  |  |  |
Red River Pipeline Company LLC |  |  |  |  |
Partners Capital and Distribution [Line Items] |  |  |  |  |
Noncontrolling interest, ownership (as a percent) |  |  |  |  | 33.00%

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