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Share-based Compensation Plans (Fair Value Assumptions) (Details)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Minimum
     
Fair Value Assumptions and Methodology      
Risk-free interest rate, minimum 0.10% 0.20% 0.10%
Expected dividend yield 0.40% 0.00% 0.00%
Expected life 1 year 1 year 1 year
Volatility, minimum 23.00% 24.00% 19.00%
Forfeiture rate 5.00% 5.00% 5.00%
Maximum
     
Fair Value Assumptions and Methodology      
Risk-free interest rate, maximum 0.90% 1.00% 2.50%
Expected dividend yield 0.60% 0.60% 0.50%
Expected life 4 years 4 years 5 years
Volatility, maximum 26.00% 32.00% 33.00%
Forfeiture rate 9.00% 7.00% 7.00%