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Goodwill, Purchased Technology and Other Intangible Assets - Estimated Amortization Expense (Details) - USD ($)
$ in Millions
Jan. 26, 2020
Oct. 27, 2019
Future estimated amortization expense    
2020 (remaining 9 months) $ 38  
2021 39  
2022 24  
2023 11  
2024 10  
Thereafter 20  
Total $ 142 $ 156