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Goodwill and Intangible Assets - Estimated Aggregate Amortization Expense (Details)
$ in Millions
Jul. 31, 2020
USD ($)
Estimated aggregate future amortization expense  
Expense remainder of fiscal year $ 40.9
2022 46.1
2023 38.4
2024 31.3
2025 25.7
Thereafter $ 110.7