Cash, Cash Equivalents and Investments (Details) - USD ($)		3 Months Ended		9 Months Ended
		Jul. 26, 2015	Jul. 27, 2014	Jul. 26, 2015	Jul. 27, 2014	Oct. 26, 2014
Schedule of Investments [Line Items]
Gross realized gains			$ 9,000,000		$ 21,000,000
Contractual maturities of investments
Due in one year or less, Cost		$ 156,000,000		$ 156,000,000
Due after one through five years, Cost		559,000,000		559,000,000
Due after five years, Cost		4,000,000		4,000,000
No single maturity date, Cost	[1]	380,000,000		380,000,000
Short-term and long-term investments, Cost		1,099,000,000		1,099,000,000		$ 1,062,000,000
Due in one year or less, Estimated Fair Value		156,000,000		156,000,000
Due after one through five years, Estimated Fair Value		559,000,000		559,000,000
Due after five years, Estimated Fair Value		4,000,000		4,000,000
No single maturity date, Estimated Fair Value	[1]	408,000,000		408,000,000
Investments maturities, Estimated Fair Value		1,127,000,000		1,127,000,000		1,095,000,000
Equity Investments In Privately Held Companies [Member]
Schedule of Investments [Line Items]
Investment impairments		1,000,000	7,000,000	9,000,000	13,000,000
Marketable securities [Member]
Schedule of Investments [Line Items]
Investment impairments		0	$ 0	0	$ 0
Contractual maturities of investments
Short-term and long-term investments, Cost		28,000,000		28,000,000		19,000,000
Investments maturities, Estimated Fair Value		$ 57,000,000		$ 57,000,000		$ 50,000,000

[1] Securities with no single maturity date include publicly-traded and privately-held equity securities, and asset-backed and mortgage-backed securities.