Stock-Based Compensation - Assumptions Used to Determine Fair Values of Stock Option Grants (Details) - Graded Vesting - USD ($)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	4.00%	1.90%	0.60%
Dividend yield	2.00%	1.80%	1.60%
Weighted-average volatility factor	25.80%	27.80%	27.00%
Weighted-average expected life (in years)	5 years 6 months	5 years 7 months 6 days	5 years 8 months 12 days
Weighted-average fair value (in dollars)	$ 35.43	$ 33.29	$ 30.98