Employee Benefits - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) - $ / shares	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Employee Benefits
Expected dividend yield	1.49%	1.83%	1.60%
Expected volatility	28.02%	27.72%	22.55%
Risk-free interest rate	1.82%	1.14%	1.55%
Weighted-average expected life (years)	10 years	10 years	10 years
Weighted-average fair value of options granted during the year	$ 16.38	$ 9.19	$ 8.81