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Shareholders' Equity (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 29, 2011	Oct. 30, 2010
Share Repurchase Program [Line Items]
Shares repurchased, Shares	15.2
Repurchase of common stock, Amount	$ 693	$ 31
Remaining share repurchase capacity	468
2010 Program [Member]
Share Repurchase Program [Line Items]
Shares repurchase authorization	500
2011 Program [Member]
Share Repurchase Program [Line Items]
Shares repurchase authorization	$ 750

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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