Fair Value Measurements (Details Textual) - USD ($)	Apr. 29, 2018	Oct. 29, 2017	Apr. 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
Recurring fair value measurements
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment securities	5,018,000,000	$ 6,999,000,000
Recurring fair value measurements | Level 2
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment securities	2,850,000,000	4,050,000,000
Recurring fair value measurements | Level 3
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Investment securities	0	0
Carrying amount
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Long-term debt	5,300,000,000	5,300,000,000
Estimated fair value | Level 2
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Long-term debt	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	80,000,000	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	64,000,000	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	$ 16,000,000	$ 9,000,000