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Earnings Per Share (Details) (USD $)
In Millions, except Share data
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
BASIC EARNINGS PER SHARE    
Income (loss) from continuing operations attributable to The AES Corporation common stockholders (Income)$ (119)$ 41$ 296$ 354
Income (loss) from continuing operations attributable to The AES Corporation common stockholders (Shares)778,000,000794,000,000783,000,000762,000,000
Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax$ (0.15)$ 0.05$ 0.38$ 0.46
EFFECT OF DILUTIVE SECURITIES    
Stock options (Shares)02,000,0001,000,0002,000,000
Restricted stock units (Shares)03,000,0003,000,0003,000,000
DILUTED EARNINGS PER SHARE (INCOME)$ (119)$ 41$ 296$ 354
DILUTED EARNINGS PER SHARE (SHARES)778,000,000799,000,000787,000,000767,000,000
Diluted Earnings Per Share$ (0.15)$ 0.05$ 0.38$ 0.46
Additional options outstanding that could potentially dilute EPS in the future  15,564,11816,951,804
Shares of common stock issued upon exercise of stock options115,597 589,948 
Shares of common stock issued under the Company's profit sharing plan  1,073,539