Postretirement Benefit Plans - Weighted Average Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
U.S. defined benefit plan
Weighted average assumptions used to determine benefit obligations:
Discount rate (in percent)	4.29%	4.62%
Long-term pay progression (in percent)	3.30%	3.30%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate (in percent)	4.40%	4.33%
Long term rate of return on plan assets (in percent)	4.60%	5.10%
Long-term pay progression (in percent)	3.30%	3.30%
U.S. retiree health care plan
Weighted average assumptions used to determine benefit obligations:
Discount rate (in percent)	4.08%	4.40%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate (in percent)	4.40%	4.15%
Long term rate of return on plan assets (in percent)	4.40%	4.70%
Non-U.S. defined benefit plan
Weighted average assumptions used to determine benefit obligations:
Discount rate (in percent)	1.76%	2.41%
Long-term pay progression (in percent)	3.11%	3.21%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate (in percent)	2.41%	2.34%
Long term rate of return on plan assets (in percent)	3.18%	3.55%
Long-term pay progression (in percent)	3.21%	3.27%