Property, Plant, and Equipment (Details ARO) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligations
Asset Retirement Obligations, Noncurrent		$ 1,827	$ 1,590
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of year		1,665	1,222
Liabilities incurred (1)	[1]	77	336
Liabilities settled		(22)	(25)
Accretion		85	73
Revisions (2)	[2]	109	59
Balance at end of year		1,914	1,665
Unusual or Infrequent Item [Line Items]
Asset Retirement Obligation, Liabilities Incurred	[1]	77	336
Upstream Equipment
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Liabilities incurred (1)			307
Unusual or Infrequent Item [Line Items]
Asset Retirement Obligation, Liabilities Incurred			$ 307
Asset Retirement Obligation Costs [Member]
Unusual or Infrequent Item [Line Items]
Transco's annual funding commitment for ARO		$ 16

[1] Includes $307 million of ARO in 2021 related to acquired upstream properties.

[2] 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 2022 revisions reflect changes in removal cost estimates and increases in inflation rates, partially offset by increases in discount rates. The 2021 revisions reflect changes in removal cost estimates, increases in the estimated remaining useful life of certain assets, and increases in inflation rates.