Business Segments and Related Information, Consolidated Revenues and Expenses (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Consolidated Revenues [Abstract]
Total consolidated revenues		$ 12,444	$ 13,008
Operating costs and expenses:
Cost of sales	[1]	9,331	10,098
Other operating costs and expenses	[2]	868	757
Depreciation, amortization and accretion		547	526
Asset impairment charges		13	14
Net losses (gains) attributable to asset sales and related matters		(2)	2
General and administrative costs		57	62
Total consolidated costs and expenses		10,814	11,459
NGL Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		4,929	5,754
Crude Oil Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		4,181	4,072
Natural Gas Pipelines & Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		1,215	1,149
Petrochemical & Refined Products Services [Member]
Consolidated Revenues [Abstract]
Total consolidated revenues		$ 2,119	$ 2,033

[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 (or gains) attributable to asset sales and related matters.