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Income Taxes - US and International Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Income Tax Disclosure [Abstract]      
Income (Loss) from Continuing Operations before Income Taxes, Domestic $ 14.5 $ (13.0) $ (23.3)
Income (Loss) from Continuing Operations before Income Taxes, Foreign 63.7 39.0 44.5
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest $ 78.2 $ 26.0 $ 21.2