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Investments in Unconsolidated Affiliates (Tables) | 12 Months Ended
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Dec. 31, 2025
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of Investments in Unconsolidated Affiliates | The following table presents our investments in unconsolidated affiliates by business segment at the dates indicated. We account for these investments using the equity method.
| Ownership Interest at December 31, 2025 |  | December 31,
|  | 2025 |  | 2024
NGL Pipelines & Services: |  |  |  |  |
Venice Energy Service Company, L.L.C. (“VESCO”) | 13.1% |  | $ | 24 |  |  | $ | 24 |
K/D/S Promix, L.L.C. (“Promix”) | 50% |  | 21 |  |  | 22 |
Baton Rouge Fractionators LLC (“BRF”) | 32.2% |  | 12 |  |  | 12 |
Skelly-Belvieu Pipeline Company, L.L.C. (“Skelly-Belvieu”) | 50% |  | 21 |  |  | 25 |
Texas Express Pipeline LLC (“Texas Express”) | 35% |  | 287 |  |  | 299 |
Texas Express Gathering LLC (“TEG”) | 45% |  | 32 |  |  | 33 |
Front Range Pipeline LLC (“Front Range”) | 33.3% |  | 175 |  |  | 183 |
Total NGL Pipelines & Services |  |  | 572 |  |  | 598 |
Crude Oil Pipelines & Services: |  |  |  |  |
Seaway Crude Holdings LLC (“Seaway”) | 50% |  | 1,120 |  |  | 1,147 |
Eagle Ford Pipeline LLC (“Eagle Ford Crude Oil Pipeline”) | 50% |  | 351 |  |  | 368 |
Eagle Ford Terminals Corpus Christi LLC (“Eagle Ford Corpus Christi”) | 50% |  | 110 |  |  | 113 |
Total Crude Oil Pipelines & Services |  |  | 1,581 |  |  | 1,628 |
Natural Gas Pipelines & Services: |  |  |  |  |
White River Hub, LLC (“White River Hub”) | 50% |  | 16 |  |  | 16 |
Old Ocean Pipeline, LLC (“Old Ocean”) | 50% |  | 15 |  |  | 14 |
Total Natural Gas Pipelines & Services |  |  | 31 |  |  | 30 |
Petrochemical & Refined Products Services: |  |  |  |  |
Baton Rouge Propylene Concentrator LLC (“BRPC”) | 30% |  | 1 |  |  | 1 |
Transport 4, LLC (“Transport 4”) (1) |  |  | – |  |  | 2 |
Total Petrochemical & Refined Products Services |  |  | 1 |  |  | 3 |
Total investments in unconsolidated affiliates |  |  | $ | 2,185 |  |  | $ | 2,259 |
(1)In June 2025, we sold our 25% membership interest in Transport 4 to third parties for cash proceeds of $8 million and recorded a $6 million gain. The following table presents our equity in income of unconsolidated affiliates by business segment for the years indicated:
|  |  | For the Year Ended December 31,
|  |  |  |  | 2025 |  | 2024 |  | 2023
NGL Pipelines & Services |  |  |  |  | $ | 83 |  |  | $ | 117 |  |  | $ | 133 |
Crude Oil Pipelines & Services |  |  |  |  | 271 |  |  | 285 |  |  | 320 |
Natural Gas Pipelines & Services |  |  |  |  | 5 |  |  | 5 |  |  | 6 |
Petrochemical & Refined Products Services |  |  |  |  | 2 |  |  | 1 |  |  | 3 |
Total |  |  |  |  | $ | 361 |  |  | $ | 408 |  |  | $ | 462 |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + Details
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