Income Taxes (Reconciliation Of The Statutory U.S. Federal Rate To The Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Income Tax Disclosure [Abstract]
Statutory U.S. federal tax rate	21.00%	35.00%	35.00%
Non-U.S. taxes	(0.20%)	(0.50%)	(7.40%)
Repatriation of non-U.S. earnings, net of credits	(2.30%)	(1.60%)	(1.00%)
State and local taxes, net of federal benefit	1.40%	1.00%	3.10%
U.S. research and development tax credit	(0.70%)	(1.00%)	(3.20%)
U.S. domestic manufacturing deduction	(0.30%)	(1.60%)	(3.20%)
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Percent	(0.008)	0.238	0.000
U.S. deduction for foreign - derived intangible income	$ (0.011)	$ 0.000	$ 0.000
Global intangible low taxed income	$ 0.022	$ 0.000	$ 0.000
Other	(0.80%)	(2.00%)	1.30%
Effective tax rate	18.40%	53.10%	24.60%