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Consolidated Statements of Income and Comprehensive Income (FirstEnergy Solutions Corp.) (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Tax effect of discontinued operations $ 9 $ 8 $ 8
FES
     
Tax effect of discontinued operations $ 8 $ 8 $ 5