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Equity (Tables) | 12 Months Ended
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Dec. 31, 2018
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,
|  | 2018 |  | 2017 |  | 2016
Net income (loss) attributable to The AES Corporation |  | $ | 1,203 |  |  | $ | (1,161 | ) |  | $ | (1,130 | )
Transfers from noncontrolling interest: |  |  |  |  |  |
Increase (decrease) in The AES Corporation's paid-in capital for sale of subsidiary shares |  | (3 | ) |  | 13 |  |  | 84 |
Additional paid-in-capital, IPALCO shares, transferred to redeemable stock of subsidiaries (1) |  | — |  |  | — |  |  | (84 | )
Increase (decrease) in The AES Corporation's paid-in-capital for purchase of subsidiary shares |  | — |  |  | 240 |  |  | (2 | )
Net transfers (to) from noncontrolling interest |  | (3 | ) |  | 253 |  |  | (2 | )
Change from net income (loss) attributable to The AES Corporation and transfers (to) from noncontrolling interests |  | $ | 1,200 |  |  | $ | (908 | ) |  | $ | (1,132 | )
_____________________________ (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 |  | Derivative gains (losses), net |  | Unfunded pension obligations, net |  | Total
Balance at December 31, 2016 | $ | (2,147 | ) |  | $ | (323 | ) |  | $ | (286 | ) |  | $ | (2,756 | )
Other comprehensive income (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 | )
Other comprehensive income (loss) before reclassifications | $ | (214 | ) |  | $ | (64 | ) |  | $ | — |  |  | $ | (278 | )
Amount reclassified to earnings | (21 | ) |  | 78 |  |  | 7 |  |  | 64 |
Other comprehensive income (loss) | $ | (235 | ) |  | $ | 14 |  |  | $ | 7 |  |  | $ | (214 | )
Cumulative effect of a change in accounting principle | — |  |  | 19 |  |  | — |  |  | 19 |
Balance at December 31, 2018 | $ | (1,721 | ) |  | $ | (300 | ) |  | $ | (50 | ) |  | $ | (2,071 | )
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 Consolidated Statements of Operations:
Details About |  |  |  | December 31,
AOCL Components |  | Affected Line Item in the Consolidated Statements of Operations |  | 2018 |  | 2017 |  | 2016
Foreign currency translation adjustments, net |  |  |  |
|  | Gain (loss) on disposal and sale of business interests |  | $ | 19 |  |  | $ | (188 | ) |  | $ | — |
|  | Net loss from disposal and impairments of discontinued operations |  | 2 |  |  | (455 | ) |  | (992 | )
|  | Net income (loss) attributable to The AES Corporation |  | $ | 21 |  |  | $ | (643 | ) |  | $ | (992 | )
Derivative gains (losses), net |  |  |  |
|  | Non-regulated revenue |  | $ | (6 | ) |  | $ | 25 |  |  | $ | 111 |
|  | Non-regulated cost of sales |  | (3 | ) |  | (12 | ) |  | (57 | )
|  | Interest expense |  | (49 | ) |  | (79 | ) |  | (107 | )
|  | Foreign currency transaction gains |  | (59 | ) |  | 15 |  |  | 8 |
|  | Income from continuing operations before taxes and equity in earnings of affiliates |  | (117 | ) |  | (51 | ) |  | (45 | )
|  | Income tax expense |  | 24 |  |  | 1 |  |  | 8 |
|  | Income (loss) from continuing operations |  | (93 | ) |  | (50 | ) |  | (37 | )
|  | Less: (Income) loss from continuing operations attributable to noncontrolling interests |  | 15 |  |  | 13 |  |  | 9 |
|  | Net income (loss) attributable to The AES Corporation |  | $ | (78 | ) |  | $ | (37 | ) |  | $ | (28 | )
Amortization of defined benefit pension actuarial losses, net |  |  |  |
|  | Non-regulated cost of sales |  | — |  |  | 1 |  |  | — |
|  | General and administrative expenses |  | — |  |  | (1 | ) |  | (1 | )
|  | Other expense |  | (6 | ) |  | — |  |  | (1 | )
|  | Income from continuing operations before taxes and equity in earnings of affiliates |  | (6 | ) |  | — |  |  | (2 | )
|  | Income tax expense |  | 2 |  |  | — |  |  | 3 |
|  | Income from continuing operations |  | (4 | ) |  | — |  |  | 1 |
|  | Net loss from disposal and impairments of discontinued operations |  | (2 | ) |  | (266 | ) |  | (11 | )
|  | Net income (loss) |  | (6 | ) |  | (266 | ) |  | (10 | )
|  | Less: (Income) loss from continuing operations attributable to noncontrolling interests |  | (1 | ) |  | — |  |  | 9 |
|  | Add: Loss from discontinued operations attributable to noncontrolling interests |  | — |  |  | 18 |  |  | — |
|  | Net income (loss) attributable to The AES Corporation |  | $ | (7 | ) |  | $ | (248 | ) |  | $ | (1 | )
Total reclassifications for the period, net of income tax and noncontrolling interests |  | $ | (64 | ) |  | $ | (928 | ) |  | $ | (1,021 | )

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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