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Investments in Unconsolidated Affiliates - Schedule of Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2025 | Dec. 31, 2025 | Dec. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates |  | $ 2,185 | $ 2,259
Transport 4, LLC (“Transport 4”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest | 25.00% |  |
Proceeds from sale of equity method investments | $ 8 |  |
Equity method investment, realized gain (loss) on disposal | $ 6 |  |
NGL Pipelines & Services |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates |  | $ 572 | 598
NGL Pipelines & Services | Venice Energy Service Company, L.L.C. (“VESCO”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 13.10% |
Investments in unconsolidated affiliates |  | $ 24 | 24
NGL Pipelines & Services | K/D/S Promix, L.L.C. (“Promix”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 50.00% |
Investments in unconsolidated affiliates |  | $ 21 | 22
NGL Pipelines & Services | Baton Rouge Fractionators LLC (“BRF”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 32.20% |
Investments in unconsolidated affiliates |  | $ 12 | 12
NGL Pipelines & Services | Skelly-Belvieu Pipeline Company, L.L.C. (“Skelly-Belvieu”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 50.00% |
Investments in unconsolidated affiliates |  | $ 21 | 25
NGL Pipelines & Services | Texas Express Pipeline LLC (“Texas Express”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 35.00% |
Investments in unconsolidated affiliates |  | $ 287 | 299
NGL Pipelines & Services | Texas Express Gathering LLC (“TEG”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 45.00% |
Investments in unconsolidated affiliates |  | $ 32 | 33
NGL Pipelines & Services | Front Range Pipeline LLC (“Front Range”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 33.30% |
Investments in unconsolidated affiliates |  | $ 175 | 183
Crude Oil Pipelines & Services |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates |  | $ 1,581 | 1,628
Crude Oil Pipelines & Services | Seaway Crude Holdings LLC (“Seaway”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 50.00% |
Investments in unconsolidated affiliates |  | $ 1,120 | 1,147
Crude Oil Pipelines & Services | Eagle Ford Pipeline LLC (“Eagle Ford Crude Oil Pipeline”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 50.00% |
Investments in unconsolidated affiliates |  | $ 351 | 368
Crude Oil Pipelines & Services | Eagle Ford Terminals Corpus Christi LLC (“Eagle Ford Corpus Christi”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 50.00% |
Investments in unconsolidated affiliates |  | $ 110 | 113
Natural Gas Pipelines & Services |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates |  | $ 31 | 30
Natural Gas Pipelines & Services | White River Hub, LLC (“White River Hub”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 50.00% |
Investments in unconsolidated affiliates |  | $ 16 | 16
Natural Gas Pipelines & Services | Old Ocean Pipeline, LLC (“Old Ocean”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 50.00% |
Investments in unconsolidated affiliates |  | $ 15 | 14
Petrochemical & Refined Products Services |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates |  | $ 1 | 3
Petrochemical & Refined Products Services | Baton Rouge Propylene Concentrator LLC (“BRPC”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership interest |  | 30.00% |
Investments in unconsolidated affiliates |  | $ 1 | 1
Petrochemical & Refined Products Services | Transport 4, LLC (“Transport 4”) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investments in unconsolidated affiliates |  | $ 0 | $ 2

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