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Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($)
$ in Billions
12 Months Ended
Oct. 31, 2021
Oct. 25, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Time period for hedging of foreign currency transactions 24 months  
Amortization period for the loss on settlement of interest rate swap agreement 12 months  
Foreign exchange contracts    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative, notional amount $ 2.1 $ 1.6