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Equity (Tables) | 3 Months Ended
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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

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 505 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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