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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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Identifiable intangible assets [Abstract]
Gross Value	$ 5,891		$ 5,891		$ 4,900
Accumulated Amortization	(1,835)		(1,835)		(1,749)
Carrying Value	4,056		4,056		3,151
Amortization expense	45	$ 38	86	$ 74
Forecasted amortization expense [Abstract]
Remainder of 2022	100		100
2023	204		204
2024	212		212
2025	211		211
2026	206		206
NGL Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,198		1,198		614
Accumulated Amortization	(314)		(314)		(297)
Carrying Value	884		884		317
Amortization expense	9	6	17	12
NGL Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	449		449		449
Accumulated Amortization	(242)		(242)		(236)
Carrying Value	207		207		213
NGL Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	749		749		165
Accumulated Amortization	(72)		(72)		(61)
Carrying Value	677		677		104
Crude Oil Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,478		2,478		2,478
Accumulated Amortization	(659)		(659)		(618)
Carrying Value	1,819		1,819		1,860
Amortization expense	21	19	41	37
Crude Oil Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,195		2,195		2,195
Accumulated Amortization	(392)		(392)		(355)
Carrying Value	1,803		1,803		1,840
Crude Oil Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	283		283		283
Accumulated Amortization	(267)		(267)		(263)
Carrying Value	16		16		20
Natural Gas Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,989		1,989		1,582
Accumulated Amortization	(758)		(758)		(733)
Carrying Value	1,231		1,231		849
Amortization expense	14	11	25	21
Natural Gas Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,350		1,350		1,350
Accumulated Amortization	(569)		(569)		(550)
Carrying Value	781		781		800
Natural Gas Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	639		639		232
Accumulated Amortization	(189)		(189)		(183)
Carrying Value	450		450		49
Petrochemical & Refined Products Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	226		226		226
Accumulated Amortization	(104)		(104)		(101)
Carrying Value	122		122		125
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	(78)		(78)		(75)
Carrying Value	103		103		106
Petrochemical & Refined Products Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	45		45		45
Accumulated Amortization	(26)		(26)		(26)
Carrying Value	$ 19		$ 19		$ 19