Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Schedule Of Weighted Average Assumptions For Restricted Stock Units) (Details)

v2.4.0.8
Stock-Based Compensation (Schedule Of Weighted Average Assumptions For Restricted Stock Units) (Details) (Restricted Stock Units [Member], USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Restricted Stock Units [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period, years 3 years 6 months 21 days 3 years 25 days 3 years 10 months 3 years 11 months 5 days
Expected dividend yield 1.34% 1.44% 1.33% 1.60%
Estimated average grant date fair value per restricted stock unit (in dollars per share) $ 79.82 $ 58.67 $ 78.16 $ 51.78