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Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 29, 2020 | Sep. 30, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Divestitures |  |  |  |  |
Proceeds from sales of assets |  |  | $ 429 | $ 77 | $ 1,334
Gains/(losses) on asset sales and asset impairments, net |  |  | (719) | (28) | 114
(Gains)/losses on asset sales and asset impairments, net |  |  |  |  |
Divestitures |  |  |  |  |
Gains/(losses) on asset sales and asset impairments, net |  |  | 178 |  |
Disposed of by sale |  |  |  |  |
Divestitures |  |  |  |  |
Proceeds from sales of assets |  |  |  | 77 |
Proceeds from sale, including proceeds attributable to agreements entered into in conjunction with sale of productive assets |  |  | 451 |  |
Disposed of by sale | (Gains)/losses on asset sales and asset impairments, net |  |  |  |  |
Divestitures |  |  |  |  |
Recognized gains/(losses) related to sale of assets, net |  |  |  | 16 | 120
Recognized gains related to sale of assets |  |  |  | 31 | 146
Recognized losses related to sales of assets |  |  |  | $ 47 | $ 26
Los Angeles Basin Crude Oil Terminals | Disposed of by sale | Facilities |  |  |  |  |
Divestitures |  |  |  |  |
Proceeds from sales of assets |  |  | 200 |  |
NGL Terminals | Disposed of by sale |  |  |  |  |
Divestitures |  |  |  |  |
Proceeds attributable to multi-year supply agreement entered into in conjunction with sale of assets |  |  | 22 |  |
NGL Terminals | Disposed of by sale | Facilities |  |  |  |  |
Divestitures |  |  |  |  |
Proceeds from sale, including proceeds attributable to agreements entered into in conjunction with sale of productive assets |  |  | $ 163 |  |
Saddlehorn |  |  |  |  |
Divestitures |  |  |  |  |
Ownership percentage sold | 10.00% |  | 10.00% |  |
Proceeds from sale of equity method investments | $ 78 |  | $ 78 |  |
BridgeTex Pipeline Company, LLC (“BridgeTex”) |  |  |  |  |
Divestitures |  |  |  |  |
Ownership percentage sold |  | 30.00% |  |  | 30.00%
Proceeds from sale of equity method investments |  | $ 868 |  |  | $ 868
Gain on sale of investment in unconsolidated entities |  | $ 200 |  |  | $ 200

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