Summary of Weighted Average Grant-Date Fair Values And Weighted Average Assumptions Used to Calculate Fair Value of Options Granted (Detail) - $ / shares	1 Months Ended		3 Months Ended
	May 31, 2021	May 31, 2020	Jun. 30, 2022	Jun. 30, 2021
Valuation assumptions:
Risk-free interest rate	0.30%	0.20%
Expected option life (years)	2 years 9 months 18 days	2 years 10 months 24 days
Expected volatility	44.80%	35.50%
Stock Options
Valuation assumptions:
Weighted average grant-date fair value			$ 121.69	$ 103.03
Risk-free interest rate			3.01%	0.79%
Expected option life (years)			5 years 6 months 14 days	4 years 2 months 12 days
Expected volatility			43.51%	44.28%