Pension and Postretirement Expense Level 4 (Details) - Weighted Average Rates used to Determine the Benefit Obligations	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.50%	3.90%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	0.00%	0.00%
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	1.90%	1.90%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	2.40%	2.40%
Other Postretirement Benefits Plan [Member] | UNITED STATES
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.20%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	0.00%	0.00%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	6.60%	6.80%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%	4.50%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2029	2029
Other Postretirement Benefits Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	5.30%	6.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	0.00%	0.00%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	5.80%	5.90%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%	4.50%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2023	2030