XML 76 R60.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes (Disposal Groups, including Discontinued Operations) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Income tax expense (benefit) $ 24.2 $ 24.2 $ 8.3