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Intangible Assets and Goodwill - Schedule of Intangible Assets by Business Segment (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	$ 6,709	$ 6,339
Accumulated Amortization	(2,550)	(2,334)
Carrying Value	4,159	4,005
Customer relationship intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Carrying Value	2,400
Contract-based intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Carrying Value	1,800
NGL Pipelines & Services
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	1,499	1,203
Accumulated Amortization	(466)	(417)
Carrying Value	1,033	786
NGL Pipelines & Services | Customer relationship intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	449	449
Accumulated Amortization	(289)	(276)
Carrying Value	160	173
NGL Pipelines & Services | Contract-based intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	1,050	754
Accumulated Amortization	(177)	(141)
Carrying Value	873	613
Crude Oil Pipelines & Services
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	2,478	2,478
Accumulated Amortization	(990)	(905)
Carrying Value	1,488	1,573
Crude Oil Pipelines & Services | Customer relationship intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	2,195	2,195
Accumulated Amortization	(710)	(627)
Carrying Value	1,485	1,568
Crude Oil Pipelines & Services | Contract-based intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	283	283
Accumulated Amortization	(280)	(278)
Carrying Value	3	5
Natural Gas Pipelines & Services
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	2,501	2,432
Accumulated Amortization	(965)	(890)
Carrying Value	1,536	1,542
Natural Gas Pipelines & Services | Customer relationship intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	1,351	1,351
Accumulated Amortization	(700)	(663)
Carrying Value	651	688
Natural Gas Pipelines & Services | Contract-based intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	1,150	1,081
Accumulated Amortization	(265)	(227)
Carrying Value	885	854
Petrochemical & Refined Products Services
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	231	226
Accumulated Amortization	(129)	(122)
Carrying Value	102	104
Petrochemical & Refined Products Services | Customer relationship intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	181	181
Accumulated Amortization	(99)	(92)
Carrying Value	82	89
Petrochemical & Refined Products Services | Contract-based intangibles
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Value	50	45
Accumulated Amortization	(30)	(30)
Carrying Value	$ 20	$ 15

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+ References

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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