Earnings Per Share (Details) (USD $) In Millions, except Per Share data	3 Months Ended	9 Months Ended
Oct. 28, 2011	Oct. 29, 2010	Oct. 28, 2011	Oct. 29, 2010
Earnings Per Share [Line Items]
Net income	$ 893	$ 822	$ 2,728	$ 1,708
Weighted Average Number of Shares Outstanding, Diluted
Basic	1,813	1,939	1,860	1,950
Weighted Average Number Diluted Shares Outstanding Adjustment	15	10	14	11
Diluted	1,828	1,949	1,874	1,961
Earnings Per Share
Earnings per share - basic	$ 0.49	$ 0.42	$ 1.47	$ 0.88
Earnings per share - diluted	$ 0.49	$ 0.42	$ 1.46	$ 0.87
Earnings Per Share Textuals [Abstract]
Stock-based incentive awards, shares excluded from calculation of diluted earnings per share	137	158	147	188

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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