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Stock-Based Compensation (Details) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Dec. 25, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 4.0 $ 3.5 $ 2.9
Related tax benefit to stock based compensation 2.6 0.9 0.7
Restricted Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards outstanding (in shares) 285 229  
Granted (in shares) 142    
Vested (in shares) 68    
Forfeited (in shares) 13    
Aggregate intrinsic value 14.1    
Compensation for stock awards not yet recognized 8.1    
Compensation recognition period 4 years    
Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period 5 years    
Number of years vesting starts after the grant date 1 year    
Stock options expirations 10 years    
Weighted average grant-date fair value of options granted (in dollars per share) $ 14.89 $ 12.53 $ 7.63
Estimated forfeiture rate (in hundredths) 16.50% 17.00% 17.00%
Weighted average key assumptions [Abstract]      
Expected term (in years) 6 years 6 months 6 years 3 months 18 days 6 years 3 months 18 days
Expected price volatility (in hundredths) 37.50% 35.80% 35.30%
Risk-free interest rate (in hundredths) 0.70% 1.70% 2.40%
Dividend yield (in hundredths) 0.90% 1.10% 1.60%
Options outstanding [Roll Forward]      
Beginning balance (in shares) 1,232 1,665 1,604
Granted (in shares) 46 31 233
Exercised (in shares) (575) (464) (148)
Cancelled (in shares) (9)    
Expired (in shares)     (24)
Ending balance (in shares) 694 1,232 1,665
Weighted average exercise price [Roll Forward]      
Beginning balance (in dollars per share) $ 28.07 $ 27.85 $ 27.56
Granted (in dollars per share) $ 43.58 $ 37.54 $ 24.70
Exercised (in dollars per share) $ 28.29 $ 27.91 $ 19.26
Cancelled (in dollars per share) $ 27.01    
Expired (in dollars per share)     $ 30.78
Ending balance (in dollars per share) $ 28.93 $ 28.07 $ 27.85
Aggregate intrinsic value of all outstanding options 14.4    
Weighted average remaining contractual term of all outstanding options (in years) 5 years 9 months 18 days    
Outstanding options, exercisable (in shares) 379    
Aggregate intrinsic value of current exercisable shares 7.3    
Weighted average exercise price (in dollars per share) $ 30.50    
Weighted average remaining contractual term 4 years 8 months 12 days    
Total intrinsic value of options exercised 12.1 6.6 1.3
Stock option compensation not yet recognized 10.0    
Average stock option expense recognition period 3 years 4 months 24 days    
Options available for future issuance (in shares) 329    
Separation Agreement Modification [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 2.1