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Stock Compensation Plans - Stock-Based Compensation Expense and Related Tax Benefits (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 33	$ 26	$ 52	$ 45
Less: Tax benefit	(9)	(5)	(13)	(9)
Total stock-based compensation expense, after tax	24	21	39	36
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	105		105
Equity-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	32	25	51	43
Liability-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 1	$ 1	$ 1	$ 2

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