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Fair Value Measurements (Details Textual) - USD ($)
Jul. 29, 2018
Oct. 29, 2017
Jul. 30, 2017
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Fair value of transfers from level one to level two $ 0   $ 0
Fair value of transfers from level two to level one 0   $ 0
Investment securities 2,223,000,000 $ 3,409,000,000  
Long-term debt, principal amount 5,400,000,000 5,400,000,000  
Recurring fair value measurements      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Investment securities 4,151,000,000 6,999,000,000  
Recurring fair value measurements | Level 2      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Investment securities 2,171,000,000 4,050,000,000  
Recurring fair value measurements | Level 3      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Investment securities 0 0  
Estimated fair value | Level 2      
Schedule of Investment Income, Reported Amounts, by Category [Line Items]      
Long-term debt fair value 5,600,000,000 5,800,000,000  
Short Term And Long Term Investments | Carrying amount | 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 82,000,000 74,000,000  
Short Term And Long Term Investments | Portion at cost | 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 65,000,000 65,000,000  
Short Term And Long Term Investments | Estimated fair value | Equity investments in privately-held companies | Nonrecurring fair value measurements | 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