Income Taxes (Narrative) (Details) $ in Millions	Sep. 30, 2024 USD ($) country	Sep. 30, 2023 USD ($)
Income Tax Disclosure [Abstract]
Foreign subsidiary earnings, indefinitely invested	$ 885.8
Unrecognized tax benefits that would impact effective tax rate	15.7
Unrecognized tax benefits, interest accrued	3.9	$ 4.4
Unrecognized tax benefits, deferred tax asset excluded from interest accrued	$ 0.7	$ 0.8
Number of foreign jurisdictions | country	30