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Discontinued Operations (Effective Portion Of The Gain Or Loss On The Derivative Is Reported As A Component Of Accumulated Other Comprehensive Loss) (Details) (USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Amount of net pre-tax gain (loss) arising during the period included in accumulated other comprehensive loss $ (38)$ 2$ (116)
Effective portion, loss from discontinued operations, net of income taxes152361108
Ineffective portion, loss from discontinued operations, net of income taxes1[1] 1[1]2[1]
Total net pre-tax loss reclassified into income16[1]23[1]62[1]110[1]
Net pre-tax loss on commodity derivatives included in other comprehensive loss16(15)64(6)
Conectiv Energy [Member]
    
Amount of net pre-tax gain (loss) arising during the period included in accumulated other comprehensive loss (5) (79)
Effective portion, loss from discontinued operations, net of income taxes 28 134
Ineffective portion, loss from discontinued operations, net of income taxes [2](2)[2] [2]85[2]
Total net pre-tax loss reclassified into income 26 219
Net pre-tax loss on commodity derivatives included in other comprehensive loss 21 140
Reclassified from AOCL to income because the forecasted transactions were deemed probable not to occur $ (2) $ 86
[1]For the three and nine months ended September 30, 2011, $1 million was reclassified from AOCL to income because the forecasted hedged transactions were deemed probable not to occur. For the three and nine months ended September 30, 2010, no amounts were reclassified from AOCL to income because the forecasted hedged transactions were deemed probable not to occur.
[2]For the three and nine months ended September 30, 2010, amounts of $(2) million and $86 million, respectively, were reclassified from AOCL to income because the forecasted transactions were deemed probable not to occur.