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Equity (Tables)
 3 Months Ended
Mar. 31, 2012
Equity Tables [Abstract]  
Schedule of Stockholders Equity [Table Text Block]
   Three Months Ended March 31, 2012
   The AES    
   Corporation    
   Stockholders' Noncontrolling Total
   Equity Interest Equity
           
  (in millions)
Balance at January 1, 2012 $ 5,946 $ 3,783 $ 9,729
Net income   341   174   515
Foreign currency translation adjustment, net of income tax   92   49   141
Actuarial gains and losses and amortization of prior service costs, net          
 of income tax   1   5   6
Change in derivative fair value, net of income tax   90   17   107
Capital contributions from noncontrolling interests   -   6   6
Distributions to noncontrolling interests   -   (14)   (14)
Disposition of businesses   -   (37)   (37)
Issuance and exercise of stock-based compensation          
 benefit plans, net of income tax   19   -   19
Acquisition of subsidiary shares from noncontrolling interests   -   (1)   (1)
Balance at March 31, 2012 $ 6,489 $ 3,982 $ 10,471
           
   Three Months Ended March 31, 2011
   The AES    
   Corporation    
   Stockholders' Noncontrolling Total
   Equity Interest Equity
           
  (in millions)
Balance at January 1, 2011 $ 6,473 $ 3,940 $ 10,413
Net income   224   259   483
Change in fair value of available-for-sale securities, net of income tax   (1)   -   (1)
Foreign currency translation adjustment, net of income tax   74   54   128
Actuarial gains and losses and amortization of prior service costs, net          
 of income tax   1   2   3
Change in derivative fair value, net of income tax   61   10   71
Capital contributions from noncontrolling interests   -   1   1
Distributions to noncontrolling interests   -   (16)   (16)
Acquisition of treasury stock   (63)   -   (63)
Issuance and exercise of stock-based compensation          
 benefit plans, net of income tax   23   -   23
Balance at March 31, 2011 $ 6,792 $ 4,250 $ 11,042
Components Of Accumulated Other Comprehensive Income
   March 31, December 31,
   2012 2011
        
   (in millions)
 Foreign currency translation adjustment $ 1,875 $ 1,967
 Unrealized derivative losses, net   444   534
 Unfunded pension obligation   256   257
 Accumulated other comprehensive loss $ 2,575 $ 2,758