Annual report pursuant to Section 13 and 15(d)

Pension and Other Postretirement Benefit Programs - Weighted Average Assumptions (Details)

v3.7.0.1
Pension and Other Postretirement Benefit Programs - Weighted Average Assumptions (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
U.S. Defined Benefit Pension Plans    
Weighted average assumptions used to determine benefit obligations as of December 31, 2016:    
Discount rate (in percentage) 4.30%  
Rate of compensation increase (in percentage) 3.10%  
Weighted average assumptions used to determine net periodic benefit cost for 2016:    
Discount rate (in percentage) 4.40%  
Expected return on plan assets (in percentage) 6.75%  
Rate of compensation increase (in percentage) 3.10%  
Canadian Defined Benefit Pension Plans    
Weighted average assumptions used to determine benefit obligations as of December 31, 2016:    
Discount rate (in percentage) 3.80%  
Rate of compensation increase (in percentage) 0.00%  
Weighted average assumptions used to determine net periodic benefit cost for 2016:    
Discount rate (in percentage) 3.50%  
Expected return on plan assets (in percentage) 5.40%  
Rate of compensation increase (in percentage) 0.00%  
Retiree Health and Life Insurance Plans    
Weighted average assumptions used to determine benefit obligations as of December 31, 2016:    
Discount rate (in percentage) 4.05% 4.25%
Weighted average assumptions used to determine net periodic benefit cost for 2016:    
Discount rate (in percentage) 4.25% 3.90%