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Share-Based Compensation (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010
Share-Based Compensation
Total share-based compensation expense	$ 14	$ 17	$ 29	$ 32
Total unrecognized share-based compensation expense for all share-based payment plans	$ 171		$ 171
Weighted average period	3.5		3.5

Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset.

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