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Equity Equity - Net Income (Loss) Attributable to The AES Corporation (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income attributable to The AES Corporation | $ (85) | $ 180 | $ 69 | $ 142 | $ 206 | $ 488 | $ 133 | $ (58) | $ 306 | $ 769 | $ 114
Transfers from the noncontrolling interest: |  |  |  |  |  |  |  |  |  |  |
Net increase in The AES Corporation's paid-in capital for sale of subsidiary shares |  |  |  |  |  |  |  |  |  |  | 0
Increase in The AES Corporation's paid-in capital for purchase of subsidiary shares |  |  |  |  |  |  |  |  | 0 | 7 | 0
Net transfers (to) from noncontrolling interest |  |  |  |  |  |  |  |  | (54) | 36 |
Change from net income attributable to The AES Corporation and transfers (to) from noncontrolling interests |  |  |  |  |  |  |  |  | 252 | 805 |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |  |
Transfers from the noncontrolling interest: |  |  |  |  |  |  |  |  |  |  |
Net increase in The AES Corporation's paid-in capital for sale of subsidiary shares |  |  |  |  |  |  |  |  | 323 | 29 | 16
Increase in The AES Corporation's paid-in capital for purchase of subsidiary shares |  |  |  |  |  |  |  |  |  | 7 | $ (6)
Retained Earnings [Member] |  |  |  |  |  |  |  |  |  |  |
Transfers from the noncontrolling interest: |  |  |  |  |  |  |  |  |  |  |
Net increase in The AES Corporation's paid-in capital for sale of subsidiary shares |  |  |  |  |  |  |  |  | (377) | 0 |
Increase in The AES Corporation's paid-in capital for purchase of subsidiary shares |  |  |  |  |  |  |  |  |  | 0 |
IPALCO Enterprises, Inc. [Member] | Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |  |
Transfers from the noncontrolling interest: |  |  |  |  |  |  |  |  |  |  |
Net increase in The AES Corporation's paid-in capital for sale of subsidiary shares |  |  |  |  |  |  |  |  | 377 |  |
IPALCO Enterprises, Inc. [Member] | Retained Earnings [Member] |  |  |  |  |  |  |  |  |  |  |
Transfers from the noncontrolling interest: |  |  |  |  |  |  |  |  |  |  |
Net increase in The AES Corporation's paid-in capital for sale of subsidiary shares |  |  |  |  |  |  |  |  | $ (377) | $ 0 |

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