Cost Reduction Actions (Carrying Amount of Accrual) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019
Restructuring and Related Activities [Abstract]
Cost reduction actions		$ 25.5
Cash expenditures	$ (5.0)	(6.9)
Amount reflected in pension liability		(0.3)
Currency translation adjustment	0.3	(0.5)
Accrued balance	$ 13.1	$ 17.8