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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]  
Schedule of Effective Tax Rate
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2015
 
2014
 
2015
 
2014
 
(In percentages)
Effective income tax rate
11
 
27
 
18
 
28