Income Taxes (Disposal Groups, including Discontinued Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)	$ 19.8	$ 18.0	$ 8.8
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expense from operations			(2.1)
Valuation Allowance, Deferred Tax Asset, Change in Amount			2.1
Other items			0.0
Income tax expense (benefit)			0.0
Operating Expense [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Expense from operations			(17.5)
Valuation Allowance, Deferred Tax Asset, Change in Amount			8.5
Other items			(0.2)
Income tax expense (benefit)			$ (8.8)