Segment Disclosures Recon from Segment to Consolidated - Assets and Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 54,924		$ 54,532
Current assets	2,535		2,661
Other Assets, Noncurrent	1,819		1,830
Operating Segments [Member] | Transmission And Gulf Of America [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	302	$ 2,487
Equity-method investments	271		272
Total assets	23,275		23,149
Operating Segments [Member] | Northeast G And P [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	59	64
Equity-method investments	3,367		3,346
Total assets	12,878		12,918
Operating Segments [Member] | West [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	557	91
Equity-method investments	463		476
Total assets	12,533		12,144
Operating Segments [Member] | Gas & NGL Marketing Services
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	0	0
Equity-method investments	153		0
Total assets	193		46
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	918	$ 2,642
Equity-method investments	4,254		4,094
Total assets	$ 48,879		$ 48,257