Income Taxes (Unrecognized Tax Benefits) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1,	$ 110	$ 117	$ 128
Prior period positions - increases	13	5	8
Prior period positions - decreases	(18)	(12)	(8)
Current period positions - increases	0	0	2
Settlements with tax authorities	(13)	0	(3)
Expiration of statutes of limitations	(14)	0	(10)
Balance at December 31,	$ 78	$ 110	$ 117