Income Taxes - Components of the Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. Federal:
Current	$ 0	$ 0	$ 0
Deferred	(99)	0	(1)
U.S. Federal, Total	(99)	0	(1)
U.S. State:
Current	1	0	0
Deferred	(15)	0	0
U.S. State, Total	(14)	0	0
Foreign:
Current	8	9	7
Deferred	(5)	1	1
Foreign, Total	3	10	8
Income tax provision (benefit)	$ (110)	$ 10	$ 7