Cash, Cash Equivalents and Investments (Details 1) (USD $) In Millions, unless otherwise specified	Oct. 27, 2013
Contractual maturities of investments
Due in one year or less, Cost	$ 149
Due after one through five years, Cost	629
No single maturity date, Cost	371	[1]
Investments maturities amortized, Cost	1,149
Due in one year or less, Estimated Fair Value	149
Due after one through five years, Estimated Fair Value	632
No single maturity date, Estimated Fair Value	404	[1]
Investments maturities, Estimated Fair Value	$ 1,185

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