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Goodwill and Other Intangible Assets (Expected Amortization Expense Relating to Existing Intangible Assets) (Details)
$ in Millions
Jul. 31, 2020
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity  
2021 $ 8.0
2022 6.9
2023 6.1
2024 5.8
2025 5.6
Thereafter 34.9
Total expected amortization expense $ 67.3