Borrowings (Interest Expense Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest expense incurred	$ 0.4	$ 0.4	$ 1.2	$ 1.1
South Africa [Member] | Short term Debt [Member]
Debt Instrument [Line Items]
Interest expense incurred	1.8	0.6	3.6	1.3
Long-term Debt [Member] | South Africa [Member]
Debt Instrument [Line Items]
Interest expense incurred	4.4	4.0	12.9	12.1
Prepaid credit facility fees	$ 0.1	$ 0.1	$ 0.2	$ 0.3