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Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Millions
Jul. 31, 2022
Oct. 31, 2021
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross $ 32,310 $ 35,893
Accumulated amortization (24,165) (24,546)
Finite-lived intangible assets, net book value 8,145 11,347
Intangible assets, gross 32,339 35,920
Intangible assets, net book value 8,174 11,374
In-process research and development    
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]    
In-process research and development 29 27
Purchased technology    
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 21,792 23,932
Accumulated amortization (17,065) (17,148)
Finite-lived intangible assets, net book value 4,727 6,784
Customer contracts and related relationships    
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 8,347 8,356
Accumulated amortization (5,510) (4,533)
Finite-lived intangible assets, net book value 2,837 3,823
Order backlog    
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 1,288 2,579
Accumulated amortization (1,152) (2,352)
Finite-lived intangible assets, net book value 136 227
Trade names    
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 700 787
Accumulated amortization (353) (386)
Finite-lived intangible assets, net book value 347 401
Other    
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 183 239
Accumulated amortization (85) (127)
Finite-lived intangible assets, net book value $ 98 $ 112