Retirement Plans (Schedule of Changes Recognized in Other Comprehensive Income) (Details) $ in Millions	12 Months Ended
	Sep. 30, 2025 USD ($)
Pension plan
Amounts recognized in Accumulated other comprehensive loss
Net (gain) loss arising during the year	$ (21.1)
Effect of exchange rates	(0.7)
Amortization or settlement recognition of net (loss) gain	(2.6)
Total recognized in Other comprehensive income	(24.4)
Postretirement plan
Amounts recognized in Accumulated other comprehensive loss
Net (gain) loss arising during the year	(0.1)
Effect of exchange rates	0.2
Amortization or settlement recognition of net (loss) gain	0.2
Total recognized in Other comprehensive income	$ 0.3