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Investments in Unconsolidated Entities - Equity Method Investments (Details) $ in Millions | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2022 USD ($) Pipeline | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Nov. 30, 2022 | Sep. 30, 2022 | Jul. 31, 2022 | Jun. 30, 2022
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Investments in unconsolidated entities | $ 3,084 | $ 2,820 | $ 3,084 | $ 3,805 |  |  |  |
Gains/(losses) on investments in unconsolidated entities, net |  | 28 | 346 | 2 |  |  |  |
Capital contributions to equity method investees excluding capitalized interest |  | 29 | 13 | $ 82 |  |  |  |
Amount by which investments in unconsolidated entities exceeded our share of the underlying equity in the net assets | 204 | $ 229 | 204 |  |  |  |  |
Advantage Pipeline Holdings LLC |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Additional interest acquired (as a percent) |  |  |  |  |  |  | 50.00% |
Cactus II Pipeline LLC |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Additional interest acquired (as a percent) |  |  |  |  | 5.00% |  |  |
BridgeTex Pipeline Company, LLC (“BridgeTex”) |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  | 20.00% |  |  |  |  |  |
Investments in unconsolidated entities | 403 | $ 363 | 403 |  |  |  |  |
Capline Pipeline Company LLC (“Capline”) |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  | 54.00% |  |  |  |  |  |
Investments in unconsolidated entities | 539 | $ 535 | 539 |  |  |  |  |
Diamond Pipeline LLC |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  | 50.00% |  |  |  |  |  |
Investments in unconsolidated entities | 460 | $ 450 | 460 |  |  |  |  |
Eagle Ford Pipeline LLC |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  | 50.00% |  |  |  |  |  |
Investments in unconsolidated entities | 371 | $ 370 | 371 |  |  |  |  |
Eagle Ford Terminals Corpus Christi LLC |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  | 50.00% |  |  |  |  |  |
Investments in unconsolidated entities | 118 | $ 116 | 118 |  |  |  |  |
OMOG JV LLC (“OMOG”) |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  |  |  |  |  | 40.00% |  |
Investments in unconsolidated entities | $ 211 |  | $ 211 |  |  |  |  |
OMOG JV LLC (“OMOG”) | Acquisition of Additional Interest in Exchange for Contribution of Pipeline Assets |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) | 57.00% |  | 57.00% |  |  |  |  |
Number of pipelines or partial pipelines contributed | Pipeline | 2 |  |  |  |  |  |  |
Gains/(losses) on investments in unconsolidated entities, net | $ (25) |  |  |  |  |  |  |
Saddlehorn Pipeline Company, LLC |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  | 30.00% |  |  |  |  |  |
Investments in unconsolidated entities | 197 | $ 192 | $ 197 |  |  |  |  |
White Cliffs Pipeline, LLC |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  | 36.00% |  |  |  |  |  |
Investments in unconsolidated entities | 150 | $ 138 | 150 |  |  |  |  |
Wink to Webster Pipeline LLC (“W2W Pipeline”) |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  | 16.00% |  |  |  |  |  |
Investments in unconsolidated entities | 357 | $ 380 | 357 |  |  |  |  |
Other investments |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Investments in unconsolidated entities | $ 278 | $ 276 | $ 278 |  |  |  |  |
Advantage Pipeline Holdings LLC |  |  |  |  |  |  |  |
Investments in Unconsolidated Entities |  |  |  |  |  |  |  |
Ownership interest in unconsolidated entity (as a percent) |  |  |  |  |  |  |  | 50.00%

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