Pension Benefits Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets, Percentage of Plan Assets Determined using Fair Value	100.00%
U.S. Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Weighted-Average Discount Rate	2.70%	2.70%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Weighted-Average Discount Rate	2.70%	2.70%	2.50%
Non-U.S. Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Weighted-Average Discount Rate	3.39%	2.83%
Defined Benefit Plan, Weighted-Average Rate of Increase In Compensation Levels	3.65%	3.86%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Weighted-Average Discount Rate	2.83%	3.81%	3.67%
Defined Benefit Plan, Weighted-Average Rate of Increase In Compensation Levels	3.86%	3.67%	3.65%
Defined Benefit Plan, Weighted-Average Expected Long-term Rate of Return on Plan Assets	5.84%	5.84%	6.34%
Non-U.S. Plans | United Kingdom
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Weighted-Average Expected Long-term Rate of Return on Plan Assets	5.50%
Non-U.S. Plans | Mexico
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Weighted-Average Expected Long-term Rate of Return on Plan Assets	7.50%