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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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 26	$ 20	$ 45	$ 32
Less: Tax benefit	(5)	(4)	(9)	(6)
Total stock-based compensation expense, after tax	21	16	36	26
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	112		112
Equity-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	25	20	43	32
Liability-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 1	$ 0	$ 2	$ 0

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