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Share-Based Compensation (Fair Value Assumptions) (Details) (Stock Options, USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stock Options
     
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Expected volatility 23.00% 26.00% 31.00%
Expected annual dividend yield 1.00% 1.00% 0.00%
Expected option term (years) 6 years 6 years 6 years
Risk-free interest rate 1.13% 1.08% 2.65%
Fair value at grant date (in dollars per share) $ 2.23 $ 3.04 $ 4.54