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Goodwill, Purchased Technology and Other Intangible Assets (Future Estimated Amortization Expense) (Details) - USD ($)
$ in Millions
Oct. 31, 2021
Oct. 25, 2020
Future estimated amortization expense    
2022 $ 33  
2023 20  
2024 17  
2025 15  
2026 15  
Thereafter 4  
Carrying amount $ 104 $ 153