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Goodwill, Purchased Technology and Other Intangible Assets - Estimated Amortization Expense (Details) - USD ($)
$ in Millions
Apr. 26, 2020
Oct. 27, 2019
Future estimated amortization expense    
2020 (remaining 6 months) $ 25  
2021 40  
2022 24  
2023 12  
2024 11  
Thereafter 20  
Total $ 132 $ 156