Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
U.S. federal statutory rate	35.00%	35.00%	35.00%
State income tax, net of federal tax benefit	1.90%	1.80%	1.60%
International income taxes	(5.50%)	(4.80%)	(5.30%)
Shares-based compensation from settlements	(6.70%)
Domestic manufacturing exclusions	(1.10%)	(1.00%)	(1.50%)
Research and development credit	(0.90%)	(0.80%)	(1.20%)
Impact of the Tax Cuts and Jobs Act	9.40%
State income tax carryforwards	(1.40%)
Other, net	0.20%	0.80%	1.10%
Effective tax rate	30.90%	31.00%	29.70%