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Pension and Other Postretirement Benefit Plans (Weighted-average assumptions used to determine benefit obligation at end of year and net periodic cost) (Details)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
United States Pension Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Discount rate 4.15% 4.45%  
Rate of compensation increase 4.50% 4.50%  
Discount rate used calculating net periodic benefit cost 4.45% 4.05% 4.95%
Expected long-term rate of return on plan assets 7.00% 7.00% 7.25%
Rate of compensation increase used calculating net periodic benefit cost 4.50% 4.50% 4.50%
Foreign Pension Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Discount rate 2.64% 3.40%  
Rate of compensation increase 3.08% 3.06%  
Discount rate used calculating net periodic benefit cost 3.40% 3.32% 3.89%
Expected long-term rate of return on plan assets 5.81% 5.63% 5.44%
Rate of compensation increase used calculating net periodic benefit cost 3.06% 3.23% 3.35%
Other Postretirement Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Discount rate 4.42% 4.51%  
Discount rate used calculating net periodic benefit cost 4.88% 4.74% 5.25%
Health care cost trend rate      
Initial rate 7.00% 7.00% 7.00%
Ultimate rate 5.00% 5.00% 5.00%