Postretirement Benefit Plans - Weighted Average Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
U.S. | Defined benefit plan
Weighted average assumptions used to determine benefit obligations:
Discount rate (in percent)	3.62%	4.37%
Long-term pay progression (in percent)	3.30%	3.30%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate (in percent)	4.35%	3.77%
Long term rate of return on plan assets (in percent)	4.90%	4.80%
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)	3.63%	4.30%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate (in percent)	4.30%	3.63%
Long term rate of return on plan assets (in percent)	4.40%	4.10%
Non-U.S. | Defined benefit plan
Weighted average assumptions used to determine benefit obligations:
Discount rate (in percent)	1.46%	1.85%
Long-term pay progression (in percent)	3.06%	2.96%
Weighted average assumptions used to determine net periodic benefit cost:
Discount rate (in percent)	1.85%	1.84%
Long term rate of return on plan assets (in percent)	3.62%	2.58%
Long-term pay progression (in percent)	3.03%	2.96%