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Goodwill and Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization expense of intangible assets $ 13.4 $ 13.1 $ 41.4 $ 38.1
Remainder of Fiscal 2016 12.3   12.3  
Fiscal 2017 47.3   47.3  
Fiscal 2018 45.8   45.8  
Fiscal 2019 44.1   44.1  
Fiscal 2020 $ 42.8   $ 42.8