Income Taxes - EGTS - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax assets:
Other	$ 741	$ 686
Total deferred income tax assets, net	2,972	2,995
Deferred income tax liabilities:
Property-related items	(12,244)	(11,814)
Total deferred income tax liabilities	(15,650)	(15,933)
EGTS
Deferred income tax assets:
Federal and state carryforwards	6	0
Employee benefits	22	31
Intangibles	265	298
Derivatives and hedges	11	12
Other	4	4
Total deferred income tax assets, net	308	345
Deferred income tax liabilities:
Property-related items	(146)	(77)
Debt exchange	(53)	(60)
Employee benefits	(4)	(9)
Total deferred income tax liabilities	(203)	(146)
Net deferred income tax asset	$ 105	$ 199