Intangible Assets and Goodwill, Goodwill (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in carrying amount of goodwill [Roll Forward]
Goodwill	[1]	$ 5,712	$ 5,608	$ 5,608
Goodwill related to acquisition	[2]	104
Balance at end of period	[1]	5,712
NGL Pipelines & Services [Member]
Changes in carrying amount of goodwill [Roll Forward]
Goodwill	[1]	2,840	2,811	2,811
Goodwill related to acquisition	[2]	29
Balance at end of period	[1]	2,840
Crude Oil Pipelines & Services [Member]
Changes in carrying amount of goodwill [Roll Forward]
Goodwill	[1]	1,841	1,841	1,841
Goodwill related to acquisition	[2]	0
Balance at end of period	[1]	1,841
Natural Gas Pipelines & Services [Member]
Changes in carrying amount of goodwill [Roll Forward]
Goodwill	[1]	75	0	0
Goodwill related to acquisition	[2]	75
Balance at end of period	[1]	75
Accumulated impairment charges		296
Petrochemical & Refined Products Services [Member]
Changes in carrying amount of goodwill [Roll Forward]
Goodwill	[1]	956	$ 956	$ 956
Goodwill related to acquisition	[2]	0
Balance at end of period	[1]	956
Accumulated impairment charges		$ 1

[1] Balances are presented net of historical accumulated impairment losses of $296 million for the Natural Gas Pipelines & Service segment and $1 million for the Petrochemical & Refined Products Services segment.  There have been no goodwill impairment charges recognized for the reporting units within the NGL Pipelines & Services and Crude Oil Pipelines & Services segments.

[2] This amount represents the goodwill recognized in connection with our acquisition of Pinon Midstream in October 2024.  In general, we attribute this goodwill to our ability to expand the acquired sour gas gathering and treating system as well as our ability to leverage the acquired business with our existing NGL asset base to create future business opportunities.