Leases (Summary of Lease Information) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2022		Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021
Leases [Abstract]
Operating lease, right-of-use asset	$ 51.0			$ 51.0		$ 57.7
Short term lease obligation	10.4			10.4		11.0
Noncurrent lease obligation	40.9			40.9		46.9
Total lease obligation	$ 51.3			$ 51.3		$ 57.9
Operating lease, weighted average remaining lease term	10 years			10 years		10 years
Operating lease, weighted average discount rate, percent	6.50%			6.50%		6.30%
Operating lease, expense	$ 3.7	[1]	$ 3.6	$ 10.5	$ 11.0
Right-of-use asset obtained in exchange for operating lease liability	1.0		1.1	3.9	18.8
Operating lease, payments	$ 3.7		$ 3.6	$ 10.7	$ 11.0

[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 excluded from this amount and is not material.