Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Identifiable intangible assets [Abstract]
Gross Value	$ 5,891		$ 5,891
Accumulated Amortization	(1,972)		(1,926)
Carrying Value	3,919		3,965
Amortization expense	46	$ 41
Forecasted amortization expense [Abstract]
Remainder of 2023	154
2024	222
2025	230
2026	237
2027	235
NGL Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,198		1,198
Accumulated Amortization	(342)		(333)
Carrying Value	856		865
Amortization expense	9	8
NGL Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	449		449
Accumulated Amortization	(253)		(249)
Carrying Value	196		200
NGL Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	749		749
Accumulated Amortization	(89)		(84)
Carrying Value	660		665
Crude Oil Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,478		2,478
Accumulated Amortization	(725)		(702)
Carrying Value	1,753		1,776
Amortization expense	23	20
Crude Oil Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,195		2,195
Accumulated Amortization	(453)		(431)
Carrying Value	1,742		1,764
Crude Oil Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	283		283
Accumulated Amortization	(272)		(271)
Carrying Value	11		12
Natural Gas Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,989		1,989
Accumulated Amortization	(795)		(783)
Carrying Value	1,194		1,206
Amortization expense	12	11
Natural Gas Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,350		1,350
Accumulated Amortization	(596)		(588)
Carrying Value	754		762
Natural Gas Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	639		639
Accumulated Amortization	(199)		(195)
Carrying Value	440		444
Petrochemical & Refined Products Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	226		226
Accumulated Amortization	(110)		(108)
Carrying Value	116		118
Amortization expense	2	$ 2
Petrochemical & Refined Products Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	181		181
Accumulated Amortization	(82)		(80)
Carrying Value	99		101
Petrochemical & Refined Products Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	45		45
Accumulated Amortization	(28)		(28)
Carrying Value	$ 17		$ 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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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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