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Borrowings (Interest Expense Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Interest expense incurred $ 0.4 $ 0.3 $ 1.1 $ 0.5
Long-term Debt [Member] | South Africa [Member]        
Debt Instrument [Line Items]        
Interest expense incurred 4.0 3.0 12.1 5.7
Prepaid credit facility fees $ 0.1 $ 0.2 $ 0.3 $ 0.4