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Goodwill and Intangible Assets - Schedule of Estimated Future Amortization Expense (Details) - USD ($)
$ in Millions
Oct. 31, 2020
Oct. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]    
2021 $ 115  
2022 115  
2023 113  
2024 79  
2025 36  
Thereafter 82  
Total $ 540 $ 661