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Goodwill and Intangible Assets (Amortization Expense Expected to be Recognized) (Details)
$ in Millions
Oct. 31, 2020
USD ($)
Goodwill and Intangible Assets [Abstract]  
Remainder of fiscal 2021 $ 20
Fiscal 2022 80
Fiscal 2023 79
Fiscal 2024 54
Fiscal 2025 16
Fiscal 2026 16
Thereafter $ 56