Fair Value Measurements (Narrative) (Details) - USD ($)	12 Months Ended
	Oct. 30, 2016	Oct. 25, 2015	Oct. 26, 2014
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Fair value of level one and level two transfers amount	$ 0	$ 0
Equity investments in privately-held companies
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Impairments of investments	8,000,000	9,000,000	$ 15,000,000
Reported Value Measurement
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Long-term debt value	3,100,000,000	3,300,000,000
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	70,000,000	78,000,000
Portion at Other than Fair 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	62,000,000	70,000,000
Estimate of Fair Value Measurement | Level 2
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Long-term debt value	3,500,000,000	3,500,000,000
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	$ 8,000,000	$ 8,000,000