Basis of Presentation and Major Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2021
Discontinued Operations [Line Items]
Sales	$ 2,945.1	$ 2,502.0	$ 5,939.3	$ 4,877.2
Russia
Discontinued Operations [Line Items]
Assets held for sale	54.1		54.1
Sales					$ 25.0
Ukraine
Discontinued Operations [Line Items]
Sales					$ 5.0
Suspended asset under construction	$ 45.0		$ 45.0