Business Segments and Related Information, Consolidated Revenues and Expenses (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Consolidated Revenues [Abstract]
Total consolidated revenues		$ 10,651	$ 16,060	$ 23,095	$ 29,068
Operating costs and expenses:
Cost of sales	[1]	7,679	12,908	17,010	23,006
Other operating costs and expenses	[2]	895	884	1,763	1,641
Depreciation, amortization and accretion		562	544	1,109	1,070
Asset impairment charges		3	5	16	19
Net losses (gains) attributable to asset sales and related matters		(2)	0	(4)	2
General and administrative costs		56	62	113	124
Total consolidated costs and expenses		9,193	14,403	20,007	25,862
NGL Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		3,689	6,380	8,618	12,134
Crude Oil Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		4,304	5,385	8,485	9,457
Natural Gas Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		775	1,661	1,990	2,810
Petrochemical & Refined Products Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		$ 1,883	$ 2,634	$ 4,002	$ 4,667

[1] Cost of sales is a component of “Operating costs and expenses” as presented on our Unaudited Condensed Statements of Consolidated Operations.  Fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.

[2] Represents the cost of operating our plants, pipelines and other fixed assets excluding: depreciation, amortization and accretion charges; asset impairment charges; and net losses (gains) attributable to asset sales and related matters.