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Stockholders' Equity (Share Repurchase Program) (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2022
Jul. 31, 2022
Aug. 01, 2021
May 25, 2022
Dec. 07, 2021
Accelerated Share Repurchases [Line Items]          
Payments for Repurchase of Common Stock   $ 7,000 $ 0    
December 2021 Repurchase Plan          
Accelerated Share Repurchases [Line Items]          
Payments for Repurchase of Common Stock $ 1,500 $ 7,000      
Stock Repurchased During Period, Shares 3 12      
Stock Repurchase Program, Authorized Amount         $ 10,000
May 2022 Repurchase Plan          
Accelerated Share Repurchases [Line Items]          
Stock Repurchase Program, Authorized Amount       $ 10,000