Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Beginning balance	$ 120	$ 133	$ 166
Additions based on tax positions taken in the current year	0	17	12
Additions based on tax positions of prior years	0	0	3
Reductions based on tax positions of prior years	(9)	(30)	(48)
Ending balance	$ 111	$ 120	$ 133