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Retirement and Post Retirement Health Care Plans (Schedule of Net Periodic Benefit Costs and Benefit Payments Expected Future Service) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Pension Plan [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service Cost $ 8.1 $ 10.0 $ 2.5
Interest Cost 9.8 10.7 8.3
Expected Return on Plan Assets (11.9) (11.5) (9.2)
Amortization of Net Actuarial Loss 3.1 4.3 2.3
Amortization of Prior Service Cost 0.2 0.2 0.2
Net Periodic Benefit Cost 9.3 13.7 4.1
Prior Service Cost 0.1 0.1 0.1
Net Actuarial Loss 2.0 2.8 1.3
Total Recognized in OCI 2.1 2.9 $ 1.4
2017 13.6    
2018 13.2    
2019 14.0    
2020 14.6    
2021 15.7    
2022-2025 83.5    
Postretirement Health Coverage [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Service Cost 0.1 0.1  
Interest Cost 0.5 0.5  
Amortization of Net Actuarial Loss 0.2 0.0  
Net Periodic Benefit Cost 0.8 $ 0.6  
2017 1.1    
2018 1.2    
2019 1.3    
2020 1.3    
2021 1.3    
2022-2025 $ 5.5