Pension Benefit Plans (Weighted Average Assumptions Used To Determine Net Periodic Pension Cost) (Details) - Pension Benefit Plans	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.80%	2.60%
Expected long-term return on plan assets	3.90%	4.10%
Rate of compensation increase	2.90%	2.90%
United States | Domestic Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.10%	4.40%
Expected long-term return on plan assets	7.00%	7.00%	7.50%
Rate of compensation increase	4.00%	4.00%