Share Repurchase Activity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Oct. 27, 2012	Oct. 29, 2011	Oct. 27, 2012	Oct. 29, 2011
Disclosure Share Repurchase Activity [Abstract]
Number of shares repurchased	2.7	39.2	16.5	106.5
Total cost	$ 96	$ 645	$ 463	$ 2,013
Average per share cost including commissions (in dollars per share)	$ 35.73	$ 16.46	$ 28.01	$ 18.90

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the par value method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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