Financial Instruments and Risk Management (Schedule of Offsetting Assets and Liabilities) (Details) - FX contract - USD ($) $ in Millions		Dec. 31, 2021	Sep. 30, 2021
Derivative [Line Items]
Gross amounts of recognized assets	[1]	$ 4.7	$ 3.9
Gross amounts of recognized liabilities	[2]	(0.1)	(0.2)
Gross amounts offset in the balance sheet	[1]	(0.1)	(0.1)
Gross amounts offset in the balance sheet	[2]	0.0	0.1
Net amounts of assets presented in the balance sheet	[1]	4.6	3.8
Net amounts of liabilities presented in the balance sheet	[2]	$ (0.1)	$ (0.1)

[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.