Employee Benefits - Summary of Weighted Average Grant-date Assumptions and Weighted Average Fair Values (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Weighted average grant date assumptions and weighted average fair value
Weighted-average fair value of grants	$ 21.43	$ 17.11	$ 13.24
Risk-free interest rates	2.95%	0.75%	0.39%
Dividend yield	2.50%	2.06%	2.30%
Expected volatility	22.89%	22.73%	22.67%
Expected option life	5 years 18 days	4 years 11 months 19 days	4 years 11 months 15 days