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Acquisitions, Divestitures and Other Transactions - Joint Venture Transaction (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |
Amortization expense |  | $ 1,960 | $ 1,960 | $ 805
Customer relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Amortization expense |  | $ 1,935 | $ 1,935 | $ 772
Customer relationships | Minimum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated Useful Lives (in years) |  |  | 3 years |
Customer relationships | Maximum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated Useful Lives (in years) |  |  | 31 years |
Joint Venture Transaction | Plains Oryx Permian Basin LLC (Permian JV) | Customer relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated Useful Lives (in years) | 20 years |  |  |
Amortization |  |  | $ 28 |
Joint Venture Transaction | Plains Oryx Permian Basin LLC (Permian JV) | Level 3 |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identifiable assets acquired and liabilities assumed | $ 3,256 |  |  |
Joint Venture Transaction | Plains Oryx Permian Basin LLC (Permian JV) | Level 3 | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business combination, measurement input | 0.1175 |  |  |
Joint Venture Transaction | Plains Oryx Permian Basin LLC (Permian JV) | Level 3 | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow | Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business combination, measurement input | 0.16 |  |  |
Joint Venture Transaction | Plains Oryx Permian Basin LLC (Permian JV) | Level 3 | Measurement Input, Market Multiple | Valuation, Market Approach | Minimum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business combination, measurement input | 9.5 |  |  |
Joint Venture Transaction | Plains Oryx Permian Basin LLC (Permian JV) | Level 3 | Measurement Input, Market Multiple | Valuation, Market Approach | Maximum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Business combination, measurement input | 11.0 |  |  |
Plains Oryx Permian Basin LLC (Permian JV) | Joint Venture Transaction |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Consolidated subsidiary, ownership interest held by the parent (as a percent) |  | 65.00% |  |
Plains Oryx Permian Basin LLC (Permian JV) | Joint Venture Transaction | Oryx Midstream Holdings LLC |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Noncontrolling interest, ownership percentage | 35.00% |  |  |
Oryx Midstream Holdings LLC | Joint Venture Transaction | Plains Oryx Permian Basin LLC (Permian JV) |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Identifiable assets acquired and liabilities assumed | $ 3,256 |  |  |
Estimated Useful Lives (in years) | 20 years |  |  |
Transaction-related costs |  |  | $ 17 |
Purchase price | $ 3,256 |  |  |
Oryx Midstream Holdings LLC | Plains Oryx Permian Basin LLC (Permian JV) | Joint Venture Transaction |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Consolidated subsidiary, ownership interest held by the parent (as a percent) | 65.00% |  |  |
Stonepeak Infrastructure Partners | PAA | Series A Preferred Units | Stonepeak Infrastructure Partners, Affiliates |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Limited partner interest | 8.90% |  |  |
Stonepeak Infrastructure Partners | PAA | Maximum | Limited Partners | Stonepeak Infrastructure Partners, Affiliates |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Limited partner interest | 1.00% |  |  |

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