Property, Plant, and Equipment (Details ARO) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Asset Retirement Obligations
Asset Retirement Obligations, Noncurrent		$ 1,978	$ 1,827
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of year		1,914	1,665
Liabilities incurred		42	77
Liabilities settled		(43)	(22)
Accretion		97	85
Revisions (1)	[1]	74	109
Balance at end of year		2,084	$ 1,914
Asset Retirement Obligation Costs [Member]
Unusual or Infrequent Item [Line Items]
Transco's annual funding commitment for ARO		$ 16

[1] Several factors are considered in the annual review process, including inflation rates, current estimates for removal cost, market risk premiums, discount rates, and the estimated remaining useful life of the assets. The 2023 and 2022 revisions reflect changes in removal cost estimates and increases in inflation rates, partially offset by increases in discount rates.