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Equity Based Compensation - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 29, 2012
Jun. 29, 2012
Year
Jun. 29, 2012
Restricted Stock
Jul. 01, 2011
Restricted Stock
Jun. 29, 2012
Performance stock units
Jul. 01, 2011
Performance stock units
Jun. 29, 2012
Performance stock units
Awards Granted during Twenty Eleven [Member]
Jun. 29, 2012
Minimum
Jun. 29, 2012
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Equity-based grants vesting period   3 years           1 year 4 years
Stock granted expiration (in years)   10              
Number of shares for equity-based compensation grants approved by shareholders 53,889,977 53,889,977              
Number of shares for equity-based compensation approved by shareholders available for grant 17,451,007 17,451,007              
Aggregate intrinsic value of exercised stock options $ 0.2                
Weighted average fair value of stock options granted   $ 1.29              
Fair market value of restricted stock vested     7.9            
Equity-based compensation granted, grant date weighted average fair value     $ 3.95 $ 5.37 $ 3.98 $ 5.40      
Performance stock units granted         1,962,549 1,640,832      
Shares issued for each PSU granted, maximum         2        
Percentage of performance stock units earned             50.00%    
Shares earned per performance stock unit             0.50    
Number of common shares vested and issued for performance stock units             99,420    
Unrecognized equity-based compensation cost $ 26.1 $ 26.1              
Weighted average period for equity-based compensation recognition, years   1 year 9 months 18 days