Financial Instruments and Risk Management (Schedule of Offsetting Assets and Liabilities) (Details) - FX contract - USD ($) $ in Millions		Dec. 31, 2019	Sep. 30, 2019
Derivative [Line Items]
Gross amounts of recognized assets	[1]	$ 1.0	$ 2.4
Gross amounts of recognized liabilities	[2]	(0.7)	(0.5)
Gross amounts offset in the balance sheet	[1]	(0.2)	0.0
Gross amounts offset in the balance sheet	[2]	0.0	0.2
Net amounts of assets presented in the balance sheet	[1]	0.8	2.4
Net amounts of liabilities presented in the balance sheet	[2]	$ (0.7)	$ (0.3)

[1] All derivative assets are presented in Other current assets or Other assets.

[2] All derivative liabilities are presented in Other current liabilities or Other liabilities.