Stock-Based Compensation (Stock Options Outstanding, Exercisable and Activity) (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Number of Shares
Beginning Balance	3,318,763
Granted	426,389
Exercised	(202,146)
Forfeited/Expired	(53,950)
Ending Balance	3,489,056	3,318,763
Vested or expected to vest, at end of period	3,440,538
Exercisable, at end of period	2,295,923
Weighted Average Exercise Price
Beginning Balance (in dollars per share)	$ 122.00
Granted (in dollars per share)	142.65
Exercised (in dollars per share)	106.53
Forfeited/Expired (in dollars per share)	139.19
Ending Balance (in dollars per share)	125.15	$ 122.00
Vested or expected to vest, at end of period (in dollars per share)	124.95
Exercisable, at end of period (in dollars per share)	$ 116.50
Weighted Average Remaining Contractual Life (in years)
Outstanding	5 years 3 months 18 days	5 years 8 months 12 days
Vested or expected to vest, at end of period	5 years 3 months 18 days
Exercisable, at end of period	3 years 10 months 24 days
Intrinsic Value (in millions)
Outstanding	$ 15
Vested or expected to vest, at end of period	15
Exercisable, at end of period	$ 15