Stock Compensation Plans (Estimated Fair Value Of Performance Shares Granted) (Details) (Performance Shares [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	0.40%	0.30%	1.20%
Expected life, in years	3 years	3 years	3 years
Expected volatility	19.10%	22.70%	26.90%
Dividend yield	4.60%	4.50%	4.70%
Weighted average fair value at grant date	$ 23.30	$ 26.06	$ 20.79