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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Identifiable intangible assets [Abstract]
Gross Value	$ 5,893		$ 5,893		$ 5,891
Accumulated Amortization	(2,022)		(2,022)		(1,926)
Carrying Value	3,871		3,871		3,965
Amortization expense	50	$ 45	96	$ 86
Forecasted amortization expense [Abstract]
Remainder of 2023	107		107
2024	222		222
2025	230		230
2026	237		237
2027	235		235
NGL Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,200		1,200		1,198
Accumulated Amortization	(352)		(352)		(333)
Carrying Value	848		848		865
Amortization expense	10	9	19	17
NGL Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	449		449		449
Accumulated Amortization	(257)		(257)		(249)
Carrying Value	192		192		200
NGL Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	751		751		749
Accumulated Amortization	(95)		(95)		(84)
Carrying Value	656		656		665
Crude Oil Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,478		2,478		2,478
Accumulated Amortization	(750)		(750)		(702)
Carrying Value	1,728		1,728		1,776
Amortization expense	25	21	48	41
Crude Oil Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	2,195		2,195		2,195
Accumulated Amortization	(477)		(477)		(431)
Carrying Value	1,718		1,718		1,764
Crude Oil Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	283		283		283
Accumulated Amortization	(273)		(273)		(271)
Carrying Value	10		10		12
Natural Gas Pipelines & Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,989		1,989		1,989
Accumulated Amortization	(808)		(808)		(783)
Carrying Value	1,181		1,181		1,206
Amortization expense	13	14	25	25
Natural Gas Pipelines & Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	1,350		1,350		1,350
Accumulated Amortization	(607)		(607)		(588)
Carrying Value	743		743		762
Natural Gas Pipelines & Services [Member] \| Contract-based intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	639		639		639
Accumulated Amortization	(201)		(201)		(195)
Carrying Value	438		438		444
Petrochemical & Refined Products Services [Member]
Identifiable intangible assets [Abstract]
Gross Value	226		226		226
Accumulated Amortization	(112)		(112)		(108)
Carrying Value	114		114		118
Amortization expense	2	$ 1	4	$ 3
Petrochemical & Refined Products Services [Member] \| Customer relationship intangibles [Member]
Identifiable intangible assets [Abstract]
Gross Value	181		181		181
Accumulated Amortization	(83)		(83)		(80)
Carrying Value	98		98		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