Cash, Cash Equivalents and Investments (Details 1) (USD $) In Millions, unless otherwise specified	Oct. 28, 2012
Contractual maturities of investments
Due in one year or less, Cost	$ 515
Due in one year or less, Estimated Fair value	516
Due after one through five years, Cost	663
Due after one through five years, Estimated Fair Value	668
Due after five years, Cost	1
Due after five years, Estimated Fair Value	2
No single maturity date, Cost	396	[1]
No single maturity date, Estimated Fair Value	414	[1]
Investments maturities amortized cost	1,575
Investments maturities fair value	$ 1,600

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