Segment Disclosures Reconciliation of Segment Assets to Consolidated (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment assets:
Total assets		$ 46,049		$ 47,612
Property, Plant and Equipment, Additions		260	$ 263
Transmission And Gulf Of Mexico [Member]
Segment assets:
Total assets		20,698		20,394
Northeast G And P [Member]
Segment assets:
Total assets		15,145		14,939
West [Member]
Segment assets:
Total assets		10,479		10,330
Gas & NGL Marketing Services
Segment assets:
Total assets	[1]	2,258		2,127
Other [Member]
Segment assets:
Total assets		2,009		2,991
Intersegment Elimination [Member]
Segment assets:
Total assets		$ (4,540)		$ (3,169)

[1] See Note 1 – General, Description of Business, and Basis of Presentation.