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Goodwill and Other Intangible Assets (Expected Amortization Expense Relating To Existing Intangible Assets) (Details)
$ in Millions
Jul. 31, 2018
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2019 $ 5.2
2020 4.9
2021 4.7
2022 3.6
2023 2.7
Thereafter 14.5
Total expected amortization expense $ 35.6