Share-Based Compensation (Assumptions For Employee Stock Purchase Plan) (Details)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.90%	1.90%
Weighted average expected life in years	5 years 9 months 18 days	5 years 10 months 24 days
Expected volatility	27.20%	36.90%
Dividend yield	2.20%	2.40%
Employee Stock Purchase Plan (ESPP)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	0.18%	0.10%
Weighted average expected life in years	1 year	1 year
Expected volatility	19.20%	21.90%
Dividend yield	2.20%	2.40%