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Acquisitions, Divestitures and Other Transactions - Future Amortization Expense (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Business Acquisition [Line Items]  
2022 $ 240
2023 232
2024 220
2025 207
2026 187
Customer relationships | Plains Oryx Permian Basin LLC (Permian JV) | Joint Venture Transaction  
Business Acquisition [Line Items]  
2022 142
2023 138
2024 127
2025 117
2026 $ 106