Share-Based Compensation Plans - Assumptions Used to Determine Grant-Date Fair Value of Options (Detail) - Black-Scholes Model [Member]	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.51%	1.13%	1.16%
Expected life	3 years	3 years	4 years
Volatility	27.00%	25.50%	39.70%
Risk free interest rate	4.16%	4.38%	4.47%