Goodwill and Intangible Assets (Schedule of Amortizable Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Sep. 30, 2025
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross carrying amount	$ 583.9		$ 583.8
Amortizable intangible assets, accumulated amortization	333.5		327.0
Amortizable intangible assets, net	250.4		256.8
Other intangible assets, net	821.8		828.2
Intangible Assets, Gross (Excluding Goodwill)	1,155.3		1,155.2
Amortization of intangibles	6.4	$ 6.4
Amortizable intangible assets, amortization expense, remainder of 2023	18.9
Amortizable intangible assets, amortization expense, fiscal 2024	25.1
Amortizable intangible assets, amortization expense, fiscal 2025	25.0
Amortizable intangible assets, amortization expense, fiscal 2026	25.0
Amortizable intangible assets, amortization expense, fiscal 2027	25.0
Amortizable intangible assets, amortization expense, fiscal 2028	18.0
Amortizable intangible assets, amortization expense, after fiscal 2028	113.4
Indefinite-lived intangible assets	571.4		571.4
Trade names and brands
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross carrying amount	237.1		237.1
Amortizable intangible assets, accumulated amortization	80.1		77.4
Amortizable intangible assets, net	157.0		159.7
Technology and patents
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross carrying amount	80.2		80.2
Amortizable intangible assets, accumulated amortization	78.6		78.4
Amortizable intangible assets, net	1.6		1.8
Customer related and other
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross carrying amount	266.6		266.5
Amortizable intangible assets, accumulated amortization	174.8		171.2
Amortizable intangible assets, net	$ 91.8		$ 95.3