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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Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Identifiable intangible assets [Abstract]
Gross Value	$ 5,895		$ 5,895		$ 5,891
Accumulated Amortization	(2,074)		(2,074)		(1,926)
Carrying Value	3,821		3,821		3,965
Amortization expense	52	$ 46	148	$ 132
Forecasted amortization expense [Abstract]
Remainder of 2023	55		55
2024	222		222
2025	231		231
2026	237		237
2027	236		236
NGL Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,201		1,201		1,198
Accumulated Amortization	(362)		(362)		(333)
Carrying Value	839		839		865
Amortization expense	10	10	29	27
NGL Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	449		449		449
Accumulated Amortization	(260)		(260)		(249)
Carrying Value	189		189		200
NGL Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	752		752		749
Accumulated Amortization	(102)		(102)		(84)
Carrying Value	650		650		665
Crude Oil Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,478		2,478		2,478
Accumulated Amortization	(778)		(778)		(702)
Carrying Value	1,700		1,700		1,776
Amortization expense	28	21	76	62
Crude Oil Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,195		2,195		2,195
Accumulated Amortization	(504)		(504)		(431)
Carrying Value	1,691		1,691		1,764
Crude Oil Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	283		283		283
Accumulated Amortization	(274)		(274)		(271)
Carrying Value	9		9		12
Natural Gas Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,990		1,990		1,989
Accumulated Amortization	(820)		(820)		(783)
Carrying Value	1,170		1,170		1,206
Amortization expense	12	13	37	38
Natural Gas Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,350		1,350		1,350
Accumulated Amortization	(615)		(615)		(588)
Carrying Value	735		735		762
Natural Gas Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	640		640		639
Accumulated Amortization	(205)		(205)		(195)
Carrying Value	435		435		444
Petrochemical & Refined Products Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	226		226		226
Accumulated Amortization	(114)		(114)		(108)
Carrying Value	112		112		118
Amortization expense	2	$ 2	6	$ 5
Petrochemical & Refined Products Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	181		181		181
Accumulated Amortization	(85)		(85)		(80)
Carrying Value	96		96		101
Petrochemical & Refined Products Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	45		45		45
Accumulated Amortization	(29)		(29)		(28)
Carrying Value	$ 16		$ 16		$ 17