Stock-Based Compensation Plans (Schedule Of Weighted-Average Assumptions For Grants Made) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation [Abstract]
Dividend yield	2.95%	2.50%	2.76%
Volatility	24.97%	27.49%	35.52%
Risk-free interest rate	1.32%	1.39%	0.76%
Expected lives in years	4 years 2 months 12 days	4 years 2 months 12 days	4 years 2 months 12 days