Income Taxes (Reconciliation Of The Statutory U.S. Federal Rate To The Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Statutory U.S. federal tax rate	21.00%	21.00%	21.00%
Non-U.S. taxes	(3.10%)	2.60%	(0.20%)
Non-U.S. income inclusion, net of tax credits	2.30%	3.40%	(0.10%)
State and local taxes, net of federal benefit	0.50%	2.50%	1.40%
U.S. research and development tax credit	(2.30%)	(1.70%)	(0.70%)
U.S. domestic manufacturing deduction	0.00%	0.00%	(0.30%)
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent	0	0	(0.008)
U.S. deduction for foreign - derived intangible income	(0.50%)	(5.10%)	(1.10%)
Other	1.40%	(1.00%)	(0.80%)
Effective tax rate	19.30%	21.70%	18.40%