Summary of Significant Accounting Policies (Property, Plant and Equipment) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Depreciation	$ 62.1	$ 78.6	$ 82.0
Property, Plant and Equipment, Gross [Abstract]
Cost	829.6	915.0
Accumulated Depreciation	532.8	586.7
Land and Land Improvements [Member]
Property, Plant and Equipment, Gross [Abstract]
Cost	16.7	18.4
Accumulated Depreciation	3.9	3.7
Building and Building Improvements [Member]
Property, Plant and Equipment, Gross [Abstract]
Cost	199.7	209.0
Accumulated Depreciation	$ 91.1	89.6
Land improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	6 years
Land improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	15 years
Buildings and building equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Buildings and building equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	40 years
Machinery and equipment [Member]
Property, Plant and Equipment, Gross [Abstract]
Cost	$ 397.0	410.9
Accumulated Depreciation	$ 285.2	288.1
Machinery and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Machinery and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Equipment leased to others | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
Equipment leased to others | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Assets Leased to Others [Member]
Property, Plant and Equipment, Gross [Abstract]
Cost	$ 216.2	276.7
Accumulated Depreciation	$ 152.6	$ 205.3