Leases (Summary of Lease Information) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2023		Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2022
Leases [Abstract]
Operating lease, right-of-use asset	$ 49.1			$ 49.1		$ 50.1
Short term lease obligation	8.6			8.6		8.8
Noncurrent lease obligation	41.0			41.0		41.5
Total lease obligation	$ 49.6			$ 49.6		$ 50.3
Operating lease, weighted average remaining lease term	11 years			11 years		10 years
Operating lease, weighted average discount rate, percent	7.00%			7.00%		6.60%
Operating lease, expense	$ 3.0	[1]	$ 3.7	$ 9.1	$ 10.5
Right-of-use asset obtained in exchange for operating lease liability	0.5		1.0	2.0	3.9
Operating lease, payments	$ 3.0		$ 3.7	$ 9.0	$ 10.7

[1] Lease expense is included in Cost of products sold or SG&A expense based on the nature of the lease. Short-term lease expense is not considered material and is, therefore, excluded from this amount.