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Cash, Cash Equivalents and Investments (Summary of Cash, Cash Equivalents and Investments) (Details) - USD ($)
$ in Millions
Jul. 29, 2018
Oct. 29, 2017
Jul. 30, 2017
Oct. 30, 2016
Summary of Cash, Cash Equivalents and Investments        
Cash $ 1,364 $ 1,346    
Total Cash equivalents 2,010 3,664    
Total Cash and Cash equivalents 3,374 5,010 $ 5,278 $ 3,406
Equity investments in privately-held companies 82 74    
Cost of short-term and long-term investments 2,173 3,334    
Gross unrealized gains on short-term and long-term investments 61 79    
Gross unrealized losses on short-term and long-term investments 11 4    
Estimated fair value of short-term and long-term investments 2,223 3,409    
Cash, cash equivalents and investments, cost 5,547 8,344    
Cash, cash equivalents and investments, gross unrealized gains 61 79    
Cash, cash equivalents and investments, gross unrealized losses 11 4    
Cash, cash equivalents and investments, estimated fair value 5,597 8,419    
Total fixed income securities        
Summary of Cash, Cash Equivalents and Investments        
Cost of fixed income securities 2,071 3,238    
Gross unrealized gains on fixed income securities 0 1    
Gross unrealized losses on fixed income securities 11 3    
Estimated fair value of fixed income securities 2,060 3,236    
U.S. Treasury and agency securities        
Summary of Cash, Cash Equivalents and Investments        
Cost of fixed income securities 336 667    
Gross unrealized gains on fixed income securities 0 0    
Gross unrealized losses on fixed income securities 2 1    
Estimated fair value of fixed income securities 334 666    
Municipal securities        
Summary of Cash, Cash Equivalents and Investments        
Cost of fixed income securities 417 1,007    
Gross unrealized gains on fixed income securities 0 0    
Gross unrealized losses on fixed income securities 2 0    
Estimated fair value of fixed income securities 415 1,007    
Commercial paper, corporate bonds and medium-term notes        
Summary of Cash, Cash Equivalents and Investments        
Cost of fixed income securities 722 1,024    
Gross unrealized gains on fixed income securities 0 1    
Gross unrealized losses on fixed income securities 3 1    
Estimated fair value of fixed income securities 719 1,024    
Asset-backed and mortgage-backed securities        
Summary of Cash, Cash Equivalents and Investments        
Cost of fixed income securities 586 379    
Gross unrealized gains on fixed income securities 0 0    
Gross unrealized losses on fixed income securities 4 1    
Estimated fair value of fixed income securities 582 378    
Publicly traded equity securities        
Summary of Cash, Cash Equivalents and Investments        
Cost of publicly traded equity securities 20 22    
Gross unrealized gains on publicly traded equity securities 61 78    
Gross unrealized losses on publicly traded equity securities 0 1    
Estimated fair value of publicly traded equity securities 81 99    
Money market funds        
Summary of Cash, Cash Equivalents and Investments        
Total Cash equivalents 1,596 2,658    
U.S. Treasury and agency securities        
Summary of Cash, Cash Equivalents and Investments        
Total Cash equivalents   15    
Municipal securities        
Summary of Cash, Cash Equivalents and Investments        
Total Cash equivalents 119 341    
Commercial paper, corporate bonds and medium-term notes        
Summary of Cash, Cash Equivalents and Investments        
Total Cash equivalents 292 595    
Asset-backed and mortgage-backed securities        
Summary of Cash, Cash Equivalents and Investments        
Total Cash equivalents 1      
CANADA | Non-U.S. government securities        
Summary of Cash, Cash Equivalents and Investments        
Cost of fixed income securities 10      
Gross unrealized gains on fixed income securities 0      
Gross unrealized losses on fixed income securities 0      
Estimated fair value of fixed income securities 10      
CANADA | Non-U.S. Government Corporations and Agencies Securities        
Summary of Cash, Cash Equivalents and Investments        
Total Cash equivalents $ 2      
Canada and Germany | Non-U.S. government securities        
Summary of Cash, Cash Equivalents and Investments        
Cost of fixed income securities   161    
Gross unrealized gains on fixed income securities   0    
Gross unrealized losses on fixed income securities   0    
Estimated fair value of fixed income securities   161    
Canada and Germany | Non-U.S. Government Corporations and Agencies Securities        
Summary of Cash, Cash Equivalents and Investments        
Total Cash equivalents   $ 55