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Share-Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended 4 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended
Oct. 05, 2013
Oct. 05, 2013
Performance Based Grants [Member]
Long Term Incentive Plan LTIP [Member]
Oct. 05, 2013
Performance Based Grants [Member]
Oct. 05, 2013
Selling, General and Administrative Expenses [Member]
Oct. 06, 2012
Selling, General and Administrative Expenses [Member]
Oct. 05, 2013
Selling, General and Administrative Expenses [Member]
Oct. 06, 2012
Selling, General and Administrative Expenses [Member]
Dec. 29, 2012
N2009 Plan [Member]
Long Term Incentive Plan LTIP [Member]
Oct. 05, 2013
N2009 Plan [Member]
Oct. 05, 2013
Time Vesting Equity Units [Member]
Oct. 05, 2013
Performance Vesting Units [Member]
Oct. 05, 2013
Minimum [Member]
Oct. 05, 2013
Maximum [Member]
Share-Based Compensation (Details) [Line Items]                          
Allocated Share-based Compensation Expense       $ 0.7 $ 2.9 $ 1.9 $ 1.3            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years               3 years        
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures (in Shares)     (30,100)         101,739          
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted (in Shares)   300,099 300,600                    
Percentage Of Number Of Performance Units Granted In Shares                       0.00% 200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)                   $ 21.18 $ 20.85