v2.4.0.6
Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended 3 Months Ended
Oct. 31, 2012
Y
employee
Oct. 27, 2012
Y
Oct. 29, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants under stock incentive plan   600,000  
Stock options, maximum period of expiration, years   10  
Total unrecognized compensation costs related to non-vested option   $ 34.5  
Weighted-average recognition period for unrecognized compensation cost related to non-vested stock awards, yeras   2.9  
Total intrinsic value of options exercised   22.0 1.7
Total fair value of options vested   10.1 7.2
Number of shares issuable per vesting of one restricted stock or unit   1  
Number of shares available for grant upon forfeiture of restricted stock or unit   3  
Number of employees affected by cancelled awards 44    
Performance period, years 3    
Portion of selling, general and administrative expenses   339.3 212.9
Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, years   four  
Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period, years   five  
Service-based Restricted Equity Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation costs related to non-vested option   29.6  
Restricted Equity Awards vesting period, years   4  
Performance-based Restricted Equity Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation costs related to non-vested option   3.9  
Restricted Equity Awards vesting period, years   3  
Awards cancelled in excahnged for new awards 554,000    
Market-based Restricted Equity Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation costs related to non-vested option   1.0  
Cash Settled LTIP Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Portion of selling, general and administrative expenses 1.7