Cash, Cash Equivalents and Investments (Details 3) (USD $) In Millions, unless otherwise specified	Oct. 30, 2011
Gross Unrealized Losses and the Fair Market Value of Investments
In Loss Position for Less Than 12 Months, Fair Value	$ 109
In Loss Position for Less Than 12 Months, Gross Unrealized Losses	2
Total, Fair Value	109
Total, Gross Unrealized Losses	2
Commercial paper, corporate bonds and medium-term notes [Member]
Gross Unrealized Losses and the Fair Market Value of Investments
In Loss Position for Less Than 12 Months, Fair Value	32
In Loss Position for Less Than 12 Months, Gross Unrealized Losses	1
Total, Fair Value	32
Total, Gross Unrealized Losses	1
Asset-backed and mortgage-backed securities [Member]
Gross Unrealized Losses and the Fair Market Value of Investments
In Loss Position for Less Than 12 Months, Fair Value	77
In Loss Position for Less Than 12 Months, Gross Unrealized Losses	1
Total, Fair Value	77
Total, Gross Unrealized Losses	$ 1