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Intangible Assets and Goodwill - Schedule of Intangible Assets by Business Segment (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | $ 6,700 | $ 6,339
Accumulated Amortization | (2,493) | (2,334)
Carrying Value | 4,207 | 4,005
NGL Pipelines & Services |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 1,499 | 1,203
Accumulated Amortization | (453) | (417)
Carrying Value | 1,046 | 786
NGL Pipelines & Services | Customer relationship intangibles |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 449 | 449
Accumulated Amortization | (286) | (276)
Carrying Value | 163 | 173
NGL Pipelines & Services | Contract-based intangibles |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 1,050 | 754
Accumulated Amortization | (167) | (141)
Carrying Value | 883 | 613
Crude Oil Pipelines & Services |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 2,478 | 2,478
Accumulated Amortization | (968) | (905)
Carrying Value | 1,510 | 1,573
Crude Oil Pipelines & Services | Customer relationship intangibles |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 2,195 | 2,195
Accumulated Amortization | (689) | (627)
Carrying Value | 1,506 | 1,568
Crude Oil Pipelines & Services | Contract-based intangibles |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 283 | 283
Accumulated Amortization | (279) | (278)
Carrying Value | 4 | 5
Natural Gas Pipelines & Services |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 2,497 | 2,432
Accumulated Amortization | (945) | (890)
Carrying Value | 1,552 | 1,542
Natural Gas Pipelines & Services | Customer relationship intangibles |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 1,351 | 1,351
Accumulated Amortization | (691) | (663)
Carrying Value | 660 | 688
Natural Gas Pipelines & Services | Contract-based intangibles |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 1,146 | 1,081
Accumulated Amortization | (254) | (227)
Carrying Value | 892 | 854
Petrochemical & Refined Products Services |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 226 | 226
Accumulated Amortization | (127) | (122)
Carrying Value | 99 | 104
Petrochemical & Refined Products Services | Customer relationship intangibles |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 181 | 181
Accumulated Amortization | (97) | (92)
Carrying Value | 84 | 89
Petrochemical & Refined Products Services | Contract-based intangibles |  |
Intangible Assets, Net (Excluding Goodwill) [Abstract] |  |
Gross Value | 45 | 45
Accumulated Amortization | (30) | (30)
Carrying Value | $ 15 | $ 15

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