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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, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 18	$ 11	$ 50	$ 37
Less: Tax benefit	(5)	(2)	(11)	(7)
Total stock-based compensation expense, after tax	13	9	39	30
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	90		90
Equity-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	18	12	50	37
Liability-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 0	$ (1)	$ 0	$ 0

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