Basis of Presentation and Accounting Policies - Narrative (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2022
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 15.7		$ 13.1
Allowance for certain customer returns, rebates and incentives	$ 16.3		$ 13.9
Antidilutive share-based compensation awards (in shares)	0.6	0.3
Capital expenditures in accounts payable or other current liabilities at period end	$ 32.9	$ 27.3
Outstanding purchase of common stock recorded in accounts payable	$ 0.8	$ 1.4