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Fair Value Measurements (Narrative) (Details) - USD ($)
12 Months Ended
Oct. 28, 2018
Oct. 29, 2017
Oct. 30, 2016
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Fair value of transfers from Level 1 to Level 2 $ 0 $ 0  
Fair value of transfers from Level 2 to Level 1 0 0  
Long-term debt principal amount 5,400,000,000 5,400,000,000  
Equity investments in privately-held companies      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Impairments of investments 5,000,000 10,000,000 $ 8,000,000
Reported Value Measurement | Short Term And Long Term Investments | Equity investments in privately-held companies      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Equity investments in privately-held companies measured on non-recurring basis 89,000,000 74,000,000  
Portion at Cost | Short Term And Long Term Investments | Equity investments in privately-held companies      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Equity investments in privately-held companies measured on non-recurring basis 72,000,000 65,000,000  
Estimate of Fair Value Measurement | Level 2      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Long-term debt fair value 5,400,000,000 5,800,000,000  
Estimate of Fair Value Measurement | Short Term And Long Term Investments | Equity investments in privately-held companies | Fair Value, Measurements, Nonrecurring | Level 3      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Equity investments in privately-held companies measured on non-recurring basis $ 17,000,000 $ 9,000,000