Black-Scholes Option-Pricing Model Assumptions (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Payment Arrangement [Abstract]
Estimated option life	5 years 7 months 9 days	5 years 3 months 21 days	5 years 4 months 9 days
Risk free interest rate (range), minimum	1.17%	0.30%	0.22%
Risk free interest rate (range), maximum	4.36%	1.55%	1.94%
Expected volatility (range), minimum	24.93%	24.46%	18.78%
Expected volatility (range), maximum	30.89%	30.80%	32.48%
Expected dividend rate	0.00%	0.00%	0.00%
Weighted average grant-date fair value per share of options granted	$ 1,437.93	$ 1,235.91	$ 737.19