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Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Schedule of Net Income Attributable to Parent And Transfers To From Noncontrolling Interests [Text Block] | The following table summarizes the net income attributable to The AES Corporation and all transfers (to) from noncontrolling interests for the periods indicated (in millions):
|  | December 31,
|  | 2017 |  | 2016 |  | 2015
Net income (loss) attributable to The AES Corporation |  | $ | (1,161 | ) |  | $ | (1,130 | ) |  | $ | 306 |
Transfers from noncontrolling interest: |  |  |  |  |  |
Net increase in The AES Corporation's paid-in capital for sale of subsidiary shares |  | 13 |  |  | 84 |  |  | 323 |
Additional paid-in-capital, IPALCO shares, transferred to redeemable stock of subsidiaries (1) |  | — |  |  | (84 | ) |  | (377 | )
Increase (decrease) in The AES Corporation's paid-in-capital for purchase of subsidiary shares |  | 240 |  |  | (2 | ) |  | — |
Net transfers (to) from noncontrolling interest |  | 253 |  |  | (2 | ) |  | (54 | )
Change from net income (loss) attributable to The AES Corporation and transfers (to) from noncontrolling interests |  | $ | (908 | ) |  | $ | (1,132 | ) |  | $ | 252 |
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(1) | See Note 17—Redeemable stock of subsidiaries for further information on increase in paid-in-capital transferred to redeemable stock of subsidiaries.
Components of Accumulated Other Comprehensive Income | The changes in AOCL by component, net of tax and noncontrolling interests, for the periods indicated were as follows (in millions):
| Foreign currency translation adjustment, net |  | Unrealized derivative losses, net |  | Unfunded pension obligations, net |  | Total
Balance at December 31,2015 | $ | (3,256 | ) |  | $ | (353 | ) |  | $ | (274 | ) |  | $ | (3,883 | )
Other comprehensive income (loss) before reclassifications | 117 |  |  | 2 |  |  | (13 | ) |  | 106 |
Amount reclassified to earnings | 992 |  |  | 28 |  |  | 1 |  |  | 1,021 |
Other comprehensive income (loss) | $ | 1,109 |  |  | $ | 30 |  |  | $ | (12 | ) |  | $ | 1,127 |
Balance at December 31, 2016 | $ | (2,147 | ) |  | $ | (323 | ) |  | $ | (286 | ) |  | $ | (2,756 | )
Other comprehensive loss before reclassifications | $ | 18 |  |  | $ | (14 | ) |  | $ | (19 | ) |  | $ | (15 | )
Amount reclassified to earnings | 643 |  |  | 37 |  |  | 248 |  |  | 928 |
Other comprehensive income | $ | 661 |  |  | $ | 23 |  |  | $ | 229 |  |  | $ | 913 |
Reclassification from NCI due to Alto Maipo Restructuring | — |  |  | (33 | ) |  | — |  |  | (33 | )
Balance at December 31, 2017 | $ | (1,486 | ) |  | $ | (333 | ) |  | $ | (57 | ) |  | $ | (1,876 | )
Reclassification out of Accumulated Other Comprehensive Income | Reclassifications out of AOCL are presented in the following table. Amounts for the periods indicated are in millions and those in parenthesis indicate debits to the Condensed Consolidated Statements of Operations:
Details About |  |  |  | December 31,
AOCL Components |  | Affected Line Item in the Consolidated Statements of Operations |  | 2017 |  | 2016 |  | 2015
Foreign currency translation adjustments, net |  |  |  |
|  | Gain (loss) on disposal and sale of businesses |  | $ | (188 | ) |  | $ | — |  |  | $ | — |
|  | Net loss from disposal and impairments of discontinued operations |  | (455 | ) |  | (992 | ) |  | — |
|  | Net income (loss) attributable to The AES Corporation |  | $ | (643 | ) |  | $ | (992 | ) |  | $ | — |
Unrealized derivative gains (losses), net |  |  |  |
|  | Non-regulated revenue |  | $ | 25 |  |  | $ | 111 |  |  | $ | 43 |
|  | Non-regulated cost of sales |  | (12 | ) |  | (57 | ) |  | (14 | )
|  | Interest expense |  | (79 | ) |  | (107 | ) |  | (112 | )
|  | Gain (loss) on disposal and sale of businesses |  | — |  |  | — |  |  | (4 | )
|  | Foreign currency transaction gains |  | 15 |  |  | 8 |  |  | 12 |
|  | Income from continuing operations before taxes and equity in earnings of affiliates |  | (51 | ) |  | (45 | ) |  | (75 | )
|  | Income tax expense |  | 1 |  |  | 8 |  |  | 11 |
|  | Net equity in earnings of affiliates |  | — |  |  | — |  |  | (2 | )
|  | Income (loss) from continuing operations |  | (50 | ) |  | (37 | ) |  | (66 | )
|  | Less: (Income) from continuing operations attributable to noncontrolling interests |  | 13 |  |  | 9 |  |  | 18 |
|  | Net income (loss) attributable to The AES Corporation |  | $ | (37 | ) |  | $ | (28 | ) |  | $ | (48 | )
Amortization of defined benefit pension actuarial losses, net |  |  |  |
|  | Non-regulated cost of sales |  | 1 |  |  | — |  |  | 2 |
|  | General and administrative expenses |  | (1 | ) |  | (1 | ) |  | (2 | )
|  | Other expense |  | — |  |  | (1 | ) |  | — |
|  | Income from continuing operations before taxes and equity in earnings of affiliates |  | — |  |  | (2 | ) |  | — |
|  | Income tax expense |  | — |  |  | 3 |  |  | 9 |
|  | Income from continuing operations |  | — |  |  | 1 |  |  | 9 |
|  | Net loss from disposal and impairments of discontinued operations |  | (266 | ) |  | (11 | ) |  | (25 | )
|  | Net income (loss) |  | (266 | ) |  | (10 | ) |  | (16 | )
|  | Less: (Income) from continuing operations attributable to noncontrolling interests |  | — |  |  | 9 |  |  | 14 |
|  | Add: Loss from discontinued operations attributable to noncontrolling interests |  | 18 |  |  | — |  |  | — |
|  | Net income (loss) attributable to The AES Corporation |  | $ | (248 | ) |  | $ | (1 | ) |  | $ | (2 | )
Total reclassifications for the period, net of income tax and noncontrolling interests |  | $ | (928 | ) |  | $ | (1,021 | ) |  | $ | (50 | )

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