Employee Benefit Plans - Weighted average fair value of restricted stock plan issuances (Details) - $ / shares	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars per share)		$ 33.03	$ 21.66
Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars per share)	$ 245.96	206.86	138.53
Time-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars per share)	$ 214.75	$ 208.08	$ 141.52