Income Taxes (Reconciliation Of The Statutory U.S. Federal Rate To The Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Statutory U.S. federal tax rate	35.00%	35.00%	35.00%
Non-U.S. taxes	(0.50%)	(7.40%)	(2.00%)
Repatriation of non-U.S. earnings, net of credits	(1.60%)	(1.00%)	(0.00%)
State and local taxes, net of federal benefit	1.00%	3.10%	1.30%
U.S. research and development tax credit	(1.00%)	(3.20%)	(0.90%)
U.S. domestic manufacturing deduction	(1.60%)	(3.20%)	(1.30%)
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Percent	0.238	0.000	0.000
Other	(2.00%)	1.30%	(0.40%)
Effective tax rate	53.10%	24.60%	31.70%