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Goodwill and Intangible Assets (Intangible Asset Amortization) (Details) - USD ($)
$ in Millions
Jan. 31, 2021
Nov. 01, 2020
Finite-lived intangible assets future amortization expense [Table]    
2021 (Remainder) $ 4,047  
2022 4,367  
2023 3,237  
2024 2,367  
2025 656  
Thereafter 720  
Finite-lived intangible assets, net book value $ 15,394 $ 16,757