Share-Based Compensation (Assumption For Fair Value Of Options Granted) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	1.30%	2.60%	2.50%
Weighted average expected life in years — Stock Options	6 years 9 months 17 days	7 years 4 months 24 days	4 years 6 months
Expected volatility	39.20%	27.40%	42.10%
Dividend yield	3.60%	3.66%	3.45%
Forfeiture rate	2.90%	3.81%	3.88%