Stock Incentive Plans - Weighted average assumptions used in fair value of each stock appreciation right award granted (Details) - Stock Appreciation Rights (SARs) - $ / shares	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	4.40%	3.00%	0.80%
Expected life of award	5 years 6 months	5 years 7 months 6 days	5 years 7 months 6 days
Expected dividend yield of stock	1.80%	1.80%	1.90%
Expected volatility of stock	39.00%	37.10%	35.70%
Weighted-average fair value (in USD per share)	$ 146.72	$ 97.70	$ 81.71