Summary of Options (Detail) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares
NUMBER OF SHARES
Options outstanding, beginning balance | shares	4,205,200
Granted | shares	898,100
Exercised | shares	(1,174,400)
Cancelled | shares	(105,600)
Options outstanding, ending balance | shares	3,823,300
Vested and expected to vest, end of period | shares	3,678,800
Exercisable, end of period | shares	1,498,400
PER SHARE EXERCISE PRICE
Options outstanding, beginning balance | $ / shares	$ 51.10	[1]
Granted | $ / shares	72.00	[1]
Exercised | $ / shares	44.08	[1]
Cancelled | $ / shares	66.09	[1]
Options outstanding, ending balance | $ / shares	57.77	[1]
Vested and expected to vest, end of period | $ / shares	57.34	[1]
Exercisable, end of period | $ / shares	$ 45.45	[1]
REMAINING CONTRACTUAL LIFE IN YEARS
Options outstanding, ending balance	6 years 7 months 20 days	[1]
Vested and expected to vest, end of period	6 years 6 months 18 days	[1]
Exercisable, end of period	4 years 3 months	[1]
AGGREGATE INTRINSIC VALUE
Options outstanding, ending balance | $	$ 152.5
Vested and expected to vest, end of period | $	148.3
Exercisable, end of period | $	$ 78.2

[1] Weighted Average