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Equity - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 6 Months Ended
Sep. 22, 2011
Jan. 28, 2012
Jan. 29, 2011
Stockholders Equity Note [Line Items]      
Purchases of common stock, shares   1.4  
Share repurchase program authorized amount $ 100    
Purchases of common stock   37.2 26.1 [1]
Stock repurchase program remaining authorized repurchase amount $ 127.1 $ 89.9  
[1] Includes amounts attributable to a non-controlling interest of $1.4 million as of July 31, 2010 and $1.5 million as of January 29, 2011. The Company sold its interest in its majority-owned investment during the fourth quarter of Fiscal 2011, thereby eliminating the non-controlling interest.