Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation (Details)

v3.8.0.1
Share-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares Available for Grant (in Shares) 5,100,000  
Percentage of Premium Paid Out in Deferred Company Common Stock 20.00%  
Non-Vested Stock Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Performance Shares Granted (in Shares) 300,000 200,000
Share-Based Compensation Expense $ 2.4 $ 2.6
Unrecognized Compensation Cost $ 22.0  
Unrecognized Compensation Cost, Period for Recognition 1 year 8 months 12 days  
Performance Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-Based Compensation Expense $ (0.5) $ 1.4
Unrecognized Compensation Cost $ 8.6  
Unrecognized Compensation Cost, Period for Recognition 1 year 9 months 18 days  
Certain Senior Executives [Member] | Performance Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Performance Shares Granted (in Shares) 100,000 100,000
Weighted Average Price at Grant Date (in Dollars per Share) $ 61.59 $ 64.82
Risk-Free Interest Rate 2.40% 1.50%
Dividend Yield 1.30% 1.10%
Volatility Factor 38.90% 38.30%
Expected Life of Award 2 years 10 months 24 days 2 years 10 months 24 days
Certain Officers and Certain Senior Managers [Member] | Performance Shares [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Performance Shares Granted (in Shares) 24,490 26,300
Weighted Average Price at Grant Date (in Dollars per Share) $ 57.19 $ 58.77