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Stock Compensation Plans - Stock-Based Compensation Expense and Related Tax Benefits (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 17	$ 18	$ 62	$ 50
Less: Tax benefit	(3)	(5)	(12)	(11)
Total stock-based compensation expense, after tax	14	13	50	39
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	96		96
Equity-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	16	18	59	50
Liability-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 1	$ 0	$ 3	$ 0

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