Discontinued Operations, Assets Held for Sale and Divestitures Schedule of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventories		$ 83.1
Other current assets		4.1
Receivables, net		54.9
Total current assets held for sale	$ 0.0	142.1
Property, plant and equipment, net		46.7
Intangible assets		51.4
Other noncurrent assets		1.8
Total noncurrent assets held for sale	0.0	99.9
Total assets held for sale		242.0
Current portion of long-term debt		0.3
Accounts payable		27.1
Other current liabilities		17.4
Total current liabilities held for sale	0.0	44.8
Long-term debt		0.4
Other noncurrent liabilities		0.4
Total noncurrent liabilities held for sale	$ 0.0	0.8
Total liabilities held for sale		45.6
Net deferred income tax liability associated with discontinued operations		$ 13.0