Summary of Options (Detail) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
NUMBER OF SHARES
Options outstanding, beginning balance | shares	4,316,800
Granted | shares	858,000
Exercised | shares	(846,700)
Cancelled | shares	(122,900)
Options outstanding, ending balance | shares	4,205,200
Vested and expected to vest, end of period | shares	4,094,000
Exercisable, end of period | shares	1,843,200
PER SHARE EXERCISE PRICE
Options outstanding, beginning balance | $ / shares	$ 47.27	[1]
Granted | $ / shares	62.75	[1]
Exercised | $ / shares	42.31	[1]
Cancelled | $ / shares	58.15	[1]
Options outstanding, ending balance | $ / shares	51.10	[1]
Vested and expected to vest, end of period | $ / shares	50.79	[1]
Exercisable, end of period | $ / shares	$ 42.01	[1]
REMAINING CONTRACTUAL LIFE IN YEARS
Options outstanding, ending balance	6 years 4 months 13 days	[1]
Vested and expected to vest, end of period	6 years 3 months 18 days	[1]
Exercisable, end of period	4 years 1 month 17 days	[1]
AGGREGATE INTRINSIC VALUE
Options outstanding, ending balance | $	$ 62.6	[1]
Vested and expected to vest, end of period | $	62.2	[1]
Exercisable, end of period | $	$ 44.2	[1]

[1] Weighted Average