Income Taxes - EEGH - Components of Net Deferred Income Tax Liability (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax assets:
Other	$ 686	$ 777
Total deferred income tax assets, net	2,995	2,974
Deferred income tax liabilities:
Property-related items	(11,814)	(10,816)
Other	(478)	(327)
Total deferred income tax liabilities	(15,933)	(14,749)
Net deferred income tax liability	(12,938)	(11,775)
EEGH
Deferred income tax assets:
Federal and state carryforwards	7	0
Employee benefits	33	30
Intangibles	150	148
Derivatives and hedges	16	18
Other	9	4
Total deferred income tax assets, net	215	200
Deferred income tax liabilities:
Property-related items	(129)	(52)
Partnership investments	(49)	(19)
Debt exchange	(60)	0
Deferred state income taxes	(16)	0
Debt issuance discount	(7)	(8)
Other	(9)	(2)
Total deferred income tax liabilities	(270)	(81)
Net deferred income tax liability	$ (55)
Net deferred income tax asset		$ 119