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Goodwill and Other Intangible Assets (Expected Amortization Expense Relating To Existing Intangible Assets) (Details) - USD ($)
$ in Millions
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]      
2017 $ 6.0    
2018 4.8    
2019 4.5    
2020 4.2    
2021 4.0    
Thereafter 15.0    
Total expected amortization expense $ 38.5 $ 37.9 $ 36.0