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Earnings Per Share (Details) (USD $)
In Millions, except Share data
3 Months Ended 12 Months Ended
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2009
Sep. 30, 2009
Jun. 30, 2009
Mar. 31, 2009
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Mar. 15, 2010
BASIC EARNINGS PER SHARE                        
Income (loss) from continuing operations attributable to The AES Corporation common stockholders (Income)                 $ 495 $ 729 $ 1,088  
Income (loss) from continuing operations attributable to The AES Corporation common stockholders (Shares)                 769,000,000 667,000,000 669,000,000  
Income from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 0.16 $ 0.06 $ 0.19 $ 0.24 $ 0.07 $ 0.27 $ 0.44 $ 0.31 $ 0.64 $ 1.09 $ 1.62  
EFFECT OF DILUTIVE SECURITIES                        
Convertible securities (Income)                 0 0 22  
Convertible securities (Shares)                 0 0 15,000,000  
Convertible securities (Per Share)                 $ 0 $ 0 $ (0.01)  
Stock options (Shares)                 2,000,000 1,000,000 4,000,000  
Restricted stock units (Shares)                 3,000,000 2,000,000 1,000,000  
DILUTED EARNINGS PER SHARE (INCOME)                 $ 495 $ 729 $ 1,110  
DILUTED EARNINGS PER SHARE (SHARES)                 774,000,000 670,000,000 689,000,000  
Diluted Earnings Per Share $ 0.16 $ 0.06 $ 0.19 $ 0.24 $ 0.07 $ 0.27 $ 0.44 $ 0.31 $ 0.64 $ 1.09 $ 1.61  
Shares Of Common Stock Sold Under Stock Purchase Agreement                       125,468,788
Additional options outstanding that could potentially dilute EPS in the future                 16,618,137 18,035,813 11,150,853