Supplemental Balance Sheet Information - Property, Plant and Equipment by Geographic Area (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Property, Plant, and Equipment
Property, plant and equipment, net	$ 668.6	$ 559.8
Operating lease assets	248.1	226.1
United States
Property, Plant, and Equipment
Property, plant and equipment, net	647.7	550.8
Operating lease assets	229.0	208.1
Non-U.S.
Property, Plant, and Equipment
Property, plant and equipment, net	20.9	9.0
Operating lease assets	$ 19.1	$ 18.0