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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2016
Income Tax Disclosure [Abstract]  
Income tax provision reconciliation
Selected information regarding Talen Energy's income tax provision for the period ended March 31 was as follows:
 
Three Months
 
2016
 
2015
Income (Loss) Before Income Taxes
$
257

 
$
149

Income Taxes
$
106

 
$
53

Effective Tax Rate
41
%
 
36
%