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UNCONSOLIDATED AFFILIATES (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) unconsolidated_affiliate | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Mar. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |  |
Number of unconsolidated affiliates | unconsolidated_affiliate | 3 |  |  |
Investments in unconsolidated affiliates | $ 2,316 | $ 1,874 | $ 802 |
Equity method goodwill | 368 | 148 |  |
Equity in net earnings from investments | 439 | 202 | 148 |
Incurred expenses | 254 | 132 | 83 |
Purchases of and contributions to unconsolidated affiliates (Note O) | $ 111 | 207 | 3 |
Overland Pass |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Net ownership percentage | 50.00% |  |  |
Investments in unconsolidated affiliates | $ 400 | 402 |  |
Equity in net earnings from investments | $ 86 | 56 | 33 |
Saddlehorn |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Net ownership percentage | 40.00% |  |  | 40.00%
Investments in unconsolidated affiliates | $ 373 | 288 |  |
Equity method investment, additional ownership percentage acquired |  |  |  | 10.00%
Equity in net earnings from investments | $ 50 | 10 | 0 |
Northern Border |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Net ownership percentage | 50.00% |  |  |
Investments in unconsolidated affiliates | $ 333 | 338 |  |
Equity in net earnings from investments | $ 95 | 75 | 71 |
Purchases of and contributions to unconsolidated affiliates (Note O) |  | 91 |  |
BridgeTex |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Net ownership percentage | 30.00% |  |  |
Investments in unconsolidated affiliates | $ 250 | 193 |  |
Equity in net earnings from investments | $ 127 | (1) | 0 |
Matterhorn |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Net ownership percentage | 15.00% |  |  |
Investments in unconsolidated affiliates | $ 248 | 0 |  |
Equity in net earnings from investments | $ 8 | 0 | 0 |
MVP |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Net ownership percentage | 25.00% |  |  |
Investments in unconsolidated affiliates | $ 235 | 241 |  |
Equity in net earnings from investments | $ 14 | 4 | 0 |
Roadrunner |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Net ownership percentage | 50.00% |  |  |
Investments in unconsolidated affiliates | $ 183 | 188 |  |
Equity in net earnings from investments | 40 | 43 | 37 |
Purchases of and contributions to unconsolidated affiliates (Note O) |  | 105 |  |
Other |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Investments in unconsolidated affiliates | 294 | 224 |  |
Equity in net earnings from investments | $ 19 | $ 15 | $ 7 |

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