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Goodwill and Other Intangible Assets - Estimated Annual Amortization Expense (Details)
$ in Millions
Oct. 31, 2019
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated amortization expense 2020 $ 49.4
Estimated amortization expense 2021 43.8
Estimated amortization expense 2022 38.2
Estimated amortization expense 2023 33.6
Estimated amortization expense 2024 $ 29.1