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Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Available-for-Sale Securities, tax $ (24) $ 43 $ (12)
Change in Fair Value of Derivative Instruments, tax (11) (33) (42)
Reclassification Adjustments for Net Amounts included in Net Income, tax 29 87 90
Pension/OPEB adjustment, tax 32 44 (18)
Power [Member]
     
Available-for-Sale Securities, tax (24) 45 (17)
Change in Fair Value of Derivative Instruments, tax (11) (33) (42)
Reclassification Adjustments for Net Amounts included in Net Income, tax 29 87 90
Pension/OPEB adjustment, tax 32 40 (15)
PSE&G [Member]
     
Available-for-Sale Securities, tax $ 0 $ (1) $ 3