Employee Benefit Plans (Weighted-Average Assumptions Used to Determine Benefit Obligations) (Details)	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Pension Plans [Member]
Discount rate	2.66%	2.81%
Postretirement Benefits [Member]
Discount rate	4.75%	5.33%
Domestic Plan [Member] | Defined Benefit Pension Plans [Member]
Discount rate	3.48%	3.67%
Rate of compensation increase	4.00%	4.00%
Foreign Plan [Member] | Defined Benefit Pension Plans [Member]
Discount rate	2.56%	2.69%
Rate of compensation increase	2.71%	2.79%