Income Taxes - Income Tax (Provision) Benefit Attributable To Income From Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
U.S. federal	$ (807)	$ (260)	$ (1)
U.S. state	(40)	(39)	(44)
Current income tax provision	(847)	(299)	(45)
Deferred:
U.S. federal	(493)	(1,788)	(585)
U.S. state	(13)	(19)	2
Deferred income tax provision	(506)	(1,807)	(583)
Income tax provision	$ (1,353)	$ (2,106)	$ (628)