Income Taxes - EEGH - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of Income Tax Expense (Benefit) [Line Items]
Federal	$ (1,701)	$ (1,537)	$ (956)
State	(177)	(121)	(13)
Total current	(1,778)	(1,572)	(888)
Federal	1,037	1,438	431
State	(476)	424	(127)
Total deferred	650	1,883	296
Total	(1,132)	308	(598)
EEGH
Components of Income Tax Expense (Benefit) [Line Items]
Federal	(47)	(20)	130
State	(21)	1	17
Total current	(68)	(19)	147
Federal	129	23	(36)
State	56	(28)	(10)
Total deferred	185	(5)	(46)
Total	$ 117	$ (24)	$ 101