Leases (Summary of Lease Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021		Dec. 31, 2020	Sep. 30, 2021
Leases [Abstract]
Operating lease, right-of-use asset	$ 56.0			$ 57.7
Short term lease obligation	11.6			11.0
Noncurrent lease obligation	44.9			46.9
Total lease obligation	$ 56.5			$ 57.9
Operating lease, weighted average remaining lease term	10 years			10 years
Operating lease, weighted average discount rate, percent	6.40%			6.30%
Operating lease, expense	$ 3.5	[1]	$ 3.9
Right-of-use asset obtained in exchange for operating lease liability	0.5		3.9
Operating lease, payments	$ 3.6		$ 4.0

[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.