Annual report pursuant to Section 13 and 15(d)

Pension and Other Postretirement Benefit Programs - Narrative (Details)

v3.7.0.1
Pension and Other Postretirement Benefit Programs - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 01, 2016
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]    
Defined contribution plan costs   $ 7.3
Minimum    
Defined Benefit Plan Disclosure [Line Items]    
Asset class performance period   10 years
Maximum    
Defined Benefit Plan Disclosure [Line Items]    
Asset class performance period   30 years
Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Assumed defined-benefit pension plan assets $ 381.4  
Defined benefit pension obligations 385.4  
AOCL related to pension and other postretirement benefit plans 101.8  
Retiree Health and Life Insurance Plans    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit pension obligations $ 82.9  
Health care cost trend rate assumed for next fiscal year, pre-65 retiree   7.20%
Health care cost rate assumed by 2025   4.50%
Expected amortization of unrecognized net actuarial losses in 2017   $ 2.6
Retiree Health and Life Insurance Plans | Minimum    
Defined Benefit Plan Disclosure [Line Items]    
Health care cost trend rate assumed for next fiscal year, post-65 retiree   8.00%
Retiree Health and Life Insurance Plans | Maximum    
Defined Benefit Plan Disclosure [Line Items]    
Health care cost trend rate assumed for next fiscal year, post-65 retiree   9.30%
U.S. Defined Benefit Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation   $ 362.2
Expected return on plan assets (in percentage)   6.75%
Expected unrecognized prior service cost and net actuarial losses to be recognized in 2017   $ 9.2
Expected employer contributions in 2017   0.1
Canadian Defined Benefit Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation   16.7
Settlement charges   $ 0.3
Expected return on plan assets (in percentage)   5.40%
Expected unrecognized prior service cost and net actuarial losses to be recognized in 2017   $ 0.1
Expected employer contributions in 2017   0.1
U.S. postretirement benefit plans    
Defined Benefit Plan Disclosure [Line Items]    
Expected employer contributions in 2017   $ 8.2