Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Identifiable intangible assets [Abstract]
Gross Value	$ 5,897		$ 5,897
Accumulated Amortization	(2,177)		(2,127)
Carrying Value	3,720		3,770
Amortization expense	50	$ 46
Forecasted amortization expense [Abstract]
Remainder of 2024	160
2025	208
2026	203
2027	185
2028	180
NGL Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,201		1,201
Accumulated Amortization	(383)		(373)
Carrying Value	818		828
Amortization expense	10	9
NGL Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	449		449
Accumulated Amortization	(267)		(263)
Carrying Value	182		186
NGL Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	752		752
Accumulated Amortization	(116)		(110)
Carrying Value	636		642
Crude Oil Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,478		2,478
Accumulated Amortization	(830)		(805)
Carrying Value	1,648		1,673
Amortization expense	25	23
Crude Oil Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,195		2,195
Accumulated Amortization	(555)		(530)
Carrying Value	1,640		1,665
Crude Oil Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	283		283
Accumulated Amortization	(275)		(275)
Carrying Value	8		8
Natural Gas Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,992		1,992
Accumulated Amortization	(847)		(834)
Carrying Value	1,145		1,158
Amortization expense	13	12
Natural Gas Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,351		1,351
Accumulated Amortization	(634)		(625)
Carrying Value	717		726
Natural Gas Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	641		641
Accumulated Amortization	(213)		(209)
Carrying Value	428		432
Petrochemical & Refined Products Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	226		226
Accumulated Amortization	(117)		(115)
Carrying Value	109		111
Amortization expense	2	$ 2
Petrochemical & Refined Products Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	181		181
Accumulated Amortization	(87)		(86)
Carrying Value	94		95
Petrochemical & Refined Products Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	45		45
Accumulated Amortization	(30)		(29)
Carrying Value	$ 15		$ 16

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in remainder of current fiscal year.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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