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Schedule I - Condensed Financial Information of Parent (Statement of Comprehensive Income) (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 | Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to The AES Corporation | $ (85) | $ 180 | $ 69 | $ 142 | $ 206 | $ 488 | $ 133 | $ (58) | $ 306 | $ 769 | $ 114 |
Foreign currency translation activity: |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments, net of income tax (expense) benefit of $1, $(7) and $10, respectively |  |  |  |  |  |  |  |  | (1,019) | (491) | (375) |
Reclassification to earnings, net of income tax (expense) benefit of $0, $0 and $0, respectively |  |  |  |  |  |  |  |  | 0 | (3) | 41 |
Total foreign currency translation adjustments |  |  |  |  |  |  |  |  | (1,019) | (494) | (334) |
Derivative activity: |  |  |  |  |  |  |  |  |  |  |  |
Change in derivative fair value, net of income tax (expense) benefit of $4, $51 and $(31), respectively |  |  |  |  |  |  |  |  | (57) | (358) | 108 |
Reclassification to earnings, net of income tax (expense) benefit of $(12), $(37) and $(32), respectively |  |  |  |  |  |  |  |  | 66 | 99 | 139 |
Total change in fair value of derivatives |  |  |  |  |  |  |  |  | 9 | (259) | 247 |
Pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost for the period, net of income tax (expense) benefit of $0, $0 and $0, respectively |  |  |  |  |  |  |  |  | 1 | 0 | 0 |
Change in pension adjustments due to net actuarial gain (loss) for the period, net of income tax (expense) benefit of $(7), $9 and $(42), respectively |  |  |  |  |  |  |  |  | 60 | (49) | 379 |
Reclassification of earnings due to amortization of net actuarial loss, net of income tax (expense) benefit of $(2), $0 and $(5), respectively |  |  |  |  |  |  |  |  | 16 | 29 | 52 |
Total pension adjustments |  |  |  |  |  |  |  |  | 77 | (20) | 431 |
OTHER COMPREHENSIVE (LOSS) INCOME |  |  |  |  |  |  |  |  | (933) | (773) | 344 |
COMPREHENSIVE (LOSS) INCOME |  |  |  |  |  |  |  |  | (171) | 374 | $ 895 |
Parent Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to The AES Corporation |  |  |  |  |  |  |  |  | 306 | 769 |  | $ 114
Foreign currency translation activity: |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustments, net of income tax (expense) benefit of $1, $(7) and $10, respectively |  |  |  |  |  |  |  |  | (674) | (366) |  | (263)
Reclassification to earnings, net of income tax (expense) benefit of $0, $0 and $0, respectively |  |  |  |  |  |  |  |  | 0 | 34 |  | 36
Total foreign currency translation adjustments |  |  |  |  |  |  |  |  | (674) | (332) |  | (227)
Derivative activity: |  |  |  |  |  |  |  |  |  |  |  |
Change in derivative fair value, net of income tax (expense) benefit of $4, $51 and $(31), respectively |  |  |  |  |  |  |  |  | (5) | (180) |  | 46
Reclassification to earnings, net of income tax (expense) benefit of $(12), $(37) and $(32), respectively |  |  |  |  |  |  |  |  | 48 | 72 |  | 128
Total change in fair value of derivatives |  |  |  |  |  |  |  |  | 43 | (108) |  | 174
Pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost for the period, net of income tax (expense) benefit of $0, $0 and $0, respectively |  |  |  |  |  |  |  |  | 1 | (1) |  | 0
Change in pension adjustments due to net actuarial gain (loss) for the period, net of income tax (expense) benefit of $(7), $9 and $(42), respectively |  |  |  |  |  |  |  |  | 18 | (13) |  | 78
Reclassification of earnings due to amortization of net actuarial loss, net of income tax (expense) benefit of $(2), $0 and $(5), respectively |  |  |  |  |  |  |  |  | 2 | 10 |  | 13
Total pension adjustments |  |  |  |  |  |  |  |  | 21 | (4) |  | 91
OTHER COMPREHENSIVE (LOSS) INCOME |  |  |  |  |  |  |  |  | (610) | (444) |  | 38
COMPREHENSIVE (LOSS) INCOME |  |  |  |  |  |  |  |  | $ (304) | $ 325 |  | $ 152

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