Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes
Balance beginning	$ 64	$ 64	$ 37
Additions based on tax positions related to the current year	6	5	22
Additions based on tax positions of prior years			18
Accrued interest	2	1	3
Settlements			(12)
Lapse of statute of limitations	(6)	(6)	(4)
Balance ending	66	$ 64	$ 64
Net unrecognized tax benefits that would impact effective tax rate	$ 54