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Earnings Per Share And Shareholders' Equity (Narrative) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	9 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Oct. 29, 2011	Oct. 30, 2010	Nov. 30, 2010 March Repurchase Program [Member]	Oct. 29, 2011 May Repurchase Program [Member]	Mar. 31, 2011 November Repurchase Program [Member]	Oct. 29, 2011 Repurchase of Equity [Member] May Repurchase Program [Member]	Oct. 29, 2011 Repurchase of Equity [Member] November Repurchase Program [Member]
Share repurchase reflected in Accounts payable				$ 4
Stock repurchase program remaining authorized repurchase amount			53	32	31
Stock Repurchased During Period, Shares	29,661	5,714				800	600
Stock Repurchased During Period, Value	$ 1,077	$ 147				$ 32	$ 26

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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