Income Taxes - Differences Between Statutory and Effective Tax Rates (Details)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	21.00%	21.00%	21.00%
State income taxes, net of federal deduction	3.30%	2.80%	1.40%
Foreign rate differential	(3.20%)	(4.70%)	(5.70%)
Non-deductible expenses / exempt income	0.20%	1.00%	1.20%
Employment and other tax credits	(1.40%)	(1.80%)	(2.90%)
Prior year provision / other items	(0.10%)	0.50%	3.10%
Change in valuation allowance	(0.10%)	(0.90%)	3.60%
Effective tax rate percentage	19.70%	17.90%	21.70%