Intangible Assets and Goodwill, Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Identifiable intangible assets [Abstract]
Gross Value	$ 5,897	$ 5,891
Accumulated Amortization	(2,127)	(1,926)
Carrying Value	3,770	3,965	$ 3,151
Amortization expense	201	177	151
Forecasted amortization expense [Abstract]
2024	210
2025	208
2026	203
2027	185
2028	180
Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Carrying Value	2,700
Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Carrying Value	1,100
NGL Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,201	1,198
Accumulated Amortization	(373)	(333)
Carrying Value	828	865
Amortization expense	40	36	24
NGL Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	449	449
Accumulated Amortization	(263)	(249)
Carrying Value	186	200
NGL Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	752	749
Accumulated Amortization	(110)	(84)
Carrying Value	642	665
Crude Oil Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,478	2,478
Accumulated Amortization	(805)	(702)
Carrying Value	1,673	1,776
Amortization expense	103	84	77
Crude Oil Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,195	2,195
Accumulated Amortization	(530)	(431)
Carrying Value	1,665	1,764
Crude Oil Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	283	283
Accumulated Amortization	(275)	(271)
Carrying Value	8	12
Natural Gas Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,992	1,989
Accumulated Amortization	(834)	(783)
Carrying Value	1,158	1,206
Amortization expense	51	50	42
Natural Gas Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,351	1,350
Accumulated Amortization	(625)	(588)
Carrying Value	726	762
Natural Gas Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	641	639
Accumulated Amortization	(209)	(195)
Carrying Value	432	444
Petrochemical & Refined Products Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	226	226
Accumulated Amortization	(115)	(108)
Carrying Value	111	118
Amortization expense	7	7	$ 8
Petrochemical & Refined Products Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	181	181
Accumulated Amortization	(86)	(80)
Carrying Value	95	101
Petrochemical & Refined Products Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	45	45
Accumulated Amortization	(29)	(28)
Carrying Value	$ 16	$ 17

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 fifth 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 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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