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Employee Benefit Plans (Narrative) (Details)
$ in Millions
12 Months Ended
Oct. 25, 2020
USD ($)
Plan
Oct. 27, 2019
USD ($)
Oct. 28, 2018
USD ($)
Employee Bonus Plans      
Charges to expense under Employee bonus plans $ 471 $ 292 $ 382
Defined Benefit Pension Plans of Foreign Subsidiaries and Other Post-Retirement Benefits      
Company contributions expected for next fiscal year $ 6    
Executive Deferred Compensation Plans      
Number of unfunded plans | Plan 2    
Executive Deferred Compensation Plans      
Executive Deferred Compensation Plans      
Amounts payable under EDCP $ 151 123  
Savings and Retirement Plan      
Employee Savings and Retirement Plan      
Employer matching contribution, percent of match 100.00%    
Employer matching contribution, percent of employees' gross pay 3.00%    
Employer matching contribution, percent of match, second tier 50.00%    
Percentage vested in matching contribution account 100.00%    
401(K) Matching contributions $ 52 $ 49 $ 45
Savings and Retirement Plan | Minimum      
Employee Savings and Retirement Plan      
Employer matching contribution, percent of employees' gross pay, second tier 4.00%    
Savings and Retirement Plan | Maximum      
Employee Savings and Retirement Plan      
Employer matching contribution, percent of employees' gross pay, second tier 6.00%