Borrowings (Interest Expense Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest expense incurred	$ 0.4	$ 0.3
Long-term Debt [Member] | South Africa [Member]
Debt Instrument [Line Items]
Interest expense incurred	4.1	3.0
Prepaid credit facility fees	$ 0.1	$ 0.2