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Stockholders' Equity (Employee Stock Purchase Plan) (Details) (USD $) In Millions, except Per Share data	3 Months Ended
	Jul. 29, 2011	Jul. 30, 2010
Stockholders' Equity
Weighted-average fair value per right granted	$ 15.88	$ 11.79
Shares issued under the ESPP	1.1	2.8
Weighted average price of shares issued	$ 39.17	$ 11.08

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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