Cash, Cash Equivalents and Investments (Details) (USD $)	3 Months Ended
	Jan. 25, 2015		Jan. 26, 2014
Contractual maturities of investments
Due in one year or less, Cost	$ 149,000,000
Due after one through five years, Cost	537,000,000
No single maturity date, Cost	370,000,000	[1]
Investments maturities, Cost	1,056,000,000
Due in one year or less, Estimated Fair Value	149,000,000
Due after one through five years, Estimated Fair Value	539,000,000
No single maturity date, Estimated Fair Value	400,000,000	[1]
Investments maturities, Estimated Fair Value	1,088,000,000
Gross realized gains	12,000,000
Marketable securities [Member]
Contractual maturities of investments
Investment impairments	$ 0		$ 0

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