Property, Plant, and Equipment (Schedule of Property, Plant and Equipment. Depreciation Expense) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Property, Plant and Equipment [Abstract]
Depreciation	$ 11.9	$ 10.9	$ 24.5	$ 21.6
Capitalized Computer Software, Amortization	$ 0.9	$ 0.9	$ 1.8	$ 2.0

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Name:	us-gaap_Depreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration