Quarterly report pursuant to Section 13 or 15(d)

Pension and Other Postretirement Benefits (Details)

v3.5.0.2
Pension and Other Postretirement Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Oct. 01, 2016
Oct. 03, 2015
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]          
Defined Benefit Plan, Increase (Decrease) in pension expense due to change in assumption, asset return $ 1.4   $ 4.2    
Defined Benefit Plan, Contributions By Employer For Nonqualified Pension Plan     2.7 $ 2.7  
Defined Benefit Plan, Contributions by Employer For Qualified Pension Plans     70.0 70.0  
Pension Plans [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Interest cost 8.9 $ 11.9 26.8 35.9  
Expected return on plan assets (9.6) (13.9) (28.8) (41.7)  
Amortization of prior service credits 0.0 0.0 0.0 0.0  
Amortization of net actuarial losses 4.3 4.9 13.0 14.6  
Net pension and other benefit costs $ 3.6 2.9 $ 11.0 8.8  
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 3.58%   3.58%   4.40%
Defined Benefit Plan, Increase (Decrease) In Interest Costs For Pension and Other Postretirement Benefits Due To Change In Discount Rate Methodology $ 2.0   $ 6.0    
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets     5.25%   6.00%
Other Postretirement Benefit Plans [Member]          
Defined Benefit Plan Disclosure [Line Items]          
Interest cost 0.4 0.4 $ 1.1 1.3  
Expected return on plan assets 0.0 0.0 0.0 0.0  
Amortization of prior service credits (0.1) (0.2) (0.4) (0.5)  
Amortization of net actuarial losses 0.0 0.4 0.0 1.0  
Net pension and other benefit costs $ 0.3 $ 0.6 $ 0.7 $ 1.8  
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 3.30%   3.30%   4.23%
Defined Benefit Plan, Increase (Decrease) In Interest Costs For Pension and Other Postretirement Benefits Due To Change In Discount Rate Methodology $ 0.1   $ 0.3