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Borrowings (Interest Expense Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Interest expense incurred | $ 2.9 | $ 1.4 | $ 1.4
South Africa [Member] | Short-term Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Interest expense incurred | 4.2 | 4.1 |
South Africa [Member] | Long-term Debt [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Interest expense incurred | 16.9 | 16.1 | 13.1
Prepaid credit facility fees | $ 0.4 | $ 0.4 | $ 0.8

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