Income Taxes (Reconciliation Of Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory income tax rate	19.00%	19.30%	34.40%
Foreign earnings subject to different tax rates	(9.70%)	18.20%	(18.50%)
Net change in unrecognized tax benefits	(0.70%)	4.30%	3.00%
Adjustments on prior year taxes	(0.70%)	(4.40%)	2.40%
Change in valuation allowance	(14.40%)	19.30%	13.10%
Deferred tax asset/liability revaluation for tax rate change	(1.70%)	1.40%	(0.80%)
U.S. transition tax	(0.80%)	17.10%	0.00%
Impairments	(16.50%)	0.00%	0.00%
Non-deductible legal provision	(3.80%)	0.00%	0.00%
Other	0.90%	5.10%	(0.90%)
Effective income tax rate	(28.40%)	80.30%	32.70%