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Long-term Equity-based Compensation Plans Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) (Stock Options [Member])
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair Value Assumptions, Expected Volatility Rate, Minimum 25.76% 39.10%
Fair Value Assumptions, Expected Volatility Rate, Maximum 44.43% 48.23%
Fair Value Assumptions, Risk Free Interest Rate, Minimum 1.07% 0.62%
Fair Value Assumptions, Risk Free Interest Rate, Maximum 2.14% 1.38%
Minimum [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair Value Assumptions, Expected Dividend Yield 2.53% 2.83%
Maximum [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair Value Assumptions, Expected Dividend Yield 2.60% 3.00%
Employee [Member] | Minimum [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair Value Assumptions, Weighted-average Expected Life 4 years 4 years
Employee [Member] | Maximum [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair Value Assumptions, Weighted-average Expected Life 7 years 7 years
Director [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair Value Assumptions, Weighted-average Expected Life 6 years 6 years