Segment Information - Intersegment Activity Eliminated in Arriving at Consolidated Totals was Included in "All Other" Category (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 9,643	$ 8,179	$ 5,992
Income taxes	878	620	596
Net Income (Loss)	2,741	1,992	1,859
Intersegment Activity Eliminated in Consolidated Totals [Member]
Segment Reporting Information [Line Items]
Revenues	(12)	(14)	(17)
Expenses	(2)	(2)	(3)
Income taxes	(3)	(3)	(4)
Net Income (Loss)	$ (7)	$ (9)	$ (10)