Pension, Other Postretirement Benefits and Savings Plans - Weighted Average Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
United States | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate, benefit obligations	4.24%	3.56%
Discount rate for determining interest costs, benefit costs	3.09%	3.18%	3.23%
Expected long term return on plan assets, benefit costs	4.58%	5.08%	5.33%
United States | Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate, benefit obligations	4.16%	3.44%
Discount rate for determining interest costs, benefit costs	2.99%	3.02%	2.98%
Non-U.S. | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate, benefit obligations	2.69%	2.53%
Rate of compensation increase, benefit obligations	2.91%	2.91%
Discount rate for determining interest costs, benefit costs	2.56%	2.70%	3.37%
Expected long term return on plan assets, benefit costs	3.02%	3.12%	3.81%
Rate of compensation increase, benefit cost	2.91%	3.18%	2.63%
Non-U.S. | Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate, benefit obligations	5.03%	4.92%
Discount rate for determining interest costs, benefit costs	6.13%	5.98%	6.31%