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Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Identifiable intangible assets [Abstract]
Gross Value	$ 5,899		$ 5,899		$ 5,897
Accumulated Amortization	(2,228)		(2,228)		(2,127)
Carrying Value	3,671		3,671		3,770
Amortization expense	51	$ 50	101	$ 96
Forecasted amortization expense [Abstract]
Remainder of 2024	107		107
2025	209		209
2026	203		203
2027	185		185
2028	181		181
NGL Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,202		1,202		1,201
Accumulated Amortization	(394)		(394)		(373)
Carrying Value	808		808		828
Amortization expense	11	10	21	19
NGL Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	449		449		449
Accumulated Amortization	(269)		(269)		(263)
Carrying Value	180		180		186
NGL Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	753		753		752
Accumulated Amortization	(125)		(125)		(110)
Carrying Value	628		628		642
Crude Oil Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,478		2,478		2,478
Accumulated Amortization	(856)		(856)		(805)
Carrying Value	1,622		1,622		1,673
Amortization expense	26	25	51	48
Crude Oil Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,195		2,195		2,195
Accumulated Amortization	(579)		(579)		(530)
Carrying Value	1,616		1,616		1,665
Crude Oil Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	283		283		283
Accumulated Amortization	(277)		(277)		(275)
Carrying Value	6		6		8
Natural Gas Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,993		1,993		1,992
Accumulated Amortization	(860)		(860)		(834)
Carrying Value	1,133		1,133		1,158
Amortization expense	13	13	26	25
Natural Gas Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,351		1,351		1,351
Accumulated Amortization	(644)		(644)		(625)
Carrying Value	707		707		726
Natural Gas Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	642		642		641
Accumulated Amortization	(216)		(216)		(209)
Carrying Value	426		426		432
Petrochemical & Refined Products Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	226		226		226
Accumulated Amortization	(118)		(118)		(115)
Carrying Value	108		108		111
Amortization expense	1	$ 2	3	$ 4
Petrochemical & Refined Products Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	181		181		181
Accumulated Amortization	(88)		(88)		(86)
Carrying Value	93		93		95
Petrochemical & Refined Products Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	45		45		45
Accumulated Amortization	(30)		(30)		(29)
Carrying Value	$ 15		$ 15		$ 16