Income Taxes (Unrecognized Tax Benefits) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1,	$ 117	$ 128	$ 167
Prior period positions - increases	5	8	48
Prior period positions - decreases	(12)	(8)	(59)
Current period positions - increases	0	2	2
Settlements with tax authorities	0	(3)	(26)
Expiration of statutes of limitations	0	(10)	(4)
Balance at December 31,	$ 110	$ 117	$ 128