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Intangible Assets (Intangible Asset Amortization) (Details) - USD ($)
$ in Millions
Jul. 31, 2022
Oct. 31, 2021
Finite-lived intangible assets future amortization expense    
2022 (Remainder) $ 1,067  
2023 3,254  
2024 2,387  
2025 680  
2026 343  
Thereafter 414  
Finite-lived intangible assets, net book value $ 8,145 $ 11,347