Cost Reduction Actions (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019 USD ($) position	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Restructuring and Related Activities [Abstract]
Cost reduction actions | $	$ 25.5	$ 0.0	$ 25.5	$ 0.0
Total number of positions eliminated or expected to be eliminated | position	300