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Stock Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 24.3   $ 24.3  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     21 months 18 days  
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Outstanding at December 27, 2014     2,192,136  
Weighted Average Exercise Price Per Share Outstanding, Beginning of Period     $ 48.95  
Granted     7,132  
Weighted Average Exercise Price Per Share Outstanding, Granted     $ 62.40  
Expired / Forfeited     (5,469)  
Weighted Average Exercise Price Per Share Outstanding, Expired/Forfeited     $ 69.04  
Exercised     (110,535)  
Weighted Average Exercise Price Per Share Outstanding, Exercised     $ 44.73  
Outstanding at June 27, 2015 2,083,264   2,083,264  
Weighted Average Exercise Price Per Share Outstanding, End of Period $ 49.15   $ 49.15  
Outstanding Shares Subject to Option, Aggregate Intrinsic Value $ 41.7   $ 41.7  
Exercisable at June 27, 2015 1,471,794   1,471,794  
Weighted Average Exercise Price Per Share Exercisable, End of Period $ 41.26   $ 41.26  
Options Exercisable at End of Period, Aggregate Intrinsic Value $ 39.7   $ 39.7  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value 0.3 $ 5.5 2.6 $ 13.9
Stock Option Expense $ 0.5 0.5 $ 1.1 0.9
Time Vested, Performance Vested and Market Vested Share Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Shares Outstanding, Beginning of Period     651,849  
Weighted Average Grant Date Fair Value, Beginning of Period     $ 59.76  
Shares Outstanding, Vested     (249,819)  
Weighted Average Grant Date Fair Value, Vested     $ 36.48  
Shares Outstanding, Forfeited     (3,551)  
Weighted Average Grant Date Fair Value, Forfeited     $ 72.13  
Shares Outstanding, End of Period 508,860   508,860  
Weighted Average Grant Date Fair Value, End of Period $ 73.11   $ 73.11  
Time, Performance and Market Vested Share Awards Expense $ 3.9 $ 3.0 $ 7.1 $ 7.6
Time Vested Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Shares Outstanding, Granted     21,287  
Weighted Average Grant Date Fair Value, Granted     $ 65.72  
Market Vested Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Shares Outstanding, Granted     23,637  
Weighted Average Grant Date Fair Value, Granted     $ 64.21  
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Shares Outstanding, Granted     62,722  
Weighted Average Grant Date Fair Value, Granted     $ 72.61  
Shares Outstanding, Performance Share Adjustments     2,735  
Weighted Average Grant Date Fair Value, Performance Share Adjustments     $ 79.42