v2.4.0.6
Stockholders' Equity (Schedule Of Employee Stock Purchase Plan (ESPP) Disclosures) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Jan. 27, 2012
Jan. 28, 2011
Jan. 27, 2012
Jan. 28, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares issued under the ESPP 1.5 3.2 2.6 6.0
Weighted-average price per share issued $ 31.03 $ 11.87 $ 34.53 $ 11.50
Employee Stock Purchase Plan [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average fair value per right granted $ 12.93 $ 16.54 $ 13.34 $ 15.35