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Shareholders' Equity (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011
Share Repurchase Program [Line Items]
Shares repurchased (in shares)	8.3
Repurchase of common stock, amount	$ 414	$ 473
Remaining share repurchase capacity	696
2011 Program [Member]
Share Repurchase Program [Line Items]
Shares repurchase authorization	750
2012 Program [Member]
Share Repurchase Program [Line Items]
Shares repurchase authorization	$ 800

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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