Employee Benefit Plans Measurement Assumptions (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	4.40%	3.70%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	3.70%	4.20%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.75%	5.75%
Domestic Plan | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	4.40%	3.80%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	3.80%	4.40%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.75%	7.25%
Foreign Plan | Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	2.90%	2.50%
Rate of Compensation Increase Assumptions Used Calculating Benefit Obligation	3.70%	3.70%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	2.50%	2.70%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	3.90%	3.90%
Rate of Compensation Increase Assumptions Used Calculating Net Periodic Benefit Cost	3.70%	3.80%