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Equity (Tables) | 12 Months Ended
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Dec. 31, 2021
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,
|  | 2021 |  | 2020 |  | 2019
Net income (loss) attributable to The AES Corporation |  | $ | (409) |  |  | $ | 46 |  |  | $ | 303 |
Transfers from noncontrolling interest: |  |  |  |  |  |
Increase (decrease) in The AES Corporation's paid-in capital for sale of subsidiary shares |  | (7) |  |  | 260 |  |  | (5) |
Increase (decrease) in The AES Corporation's paid-in-capital for purchase of subsidiary shares |  | (9) |  |  | (89) |  |  | — |
Net transfers (to) from noncontrolling interest |  | (16) |  |  | 171 |  |  | (5) |
Change from net income attributable to The AES Corporation and transfers (to) from noncontrolling interests |  | $ | (425) |  |  | $ | 217 |  |  | $ | 298 |
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, 2019 | $ | (1,721) |  |  | $ | (470) |  |  | $ | (38) |  |  | $ | (2,229) |
Other comprehensive loss before reclassifications | — |  |  | (309) |  |  | (12) |  |  | (321) |
Amount reclassified to earnings | 192 |  |  | 72 |  |  | — |  |  | 264 |
Other comprehensive income (loss) | 192 |  |  | (237) |  |  | (12) |  |  | (57) |
Reclassification from NCI due to share sales and repurchases | (115) |  |  | 8 |  |  | (4) |  |  | (111) |
Balance at December 31, 2020 | $ | (1,644) |  |  | $ | (699) |  |  | $ | (54) |  |  | $ | (2,397) |
Other comprehensive income (loss) before reclassifications | (86) |  |  | (7) |  |  | 23 |  |  | (70) |
Amount reclassified to earnings | 3 |  |  | 254 |  |  | 1 |  |  | 258 |
Other comprehensive income (loss) | (83) |  |  | 247 |  |  | 24 |  |  | 188 |
Reclassification from NCI due to share sales and repurchases | (7) |  |  | (4) |  |  | — |  |  | (11) |
Balance at December 31, 2021 | $ | (1,734) |  |  | $ | (456) |  |  | $ | (30) |  |  | $ | (2,220) |
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 |  | 2021 |  | 2020 |  | 2019 |  |
Foreign currency translation adjustments, net |  |  |  |  |  |
|  | Gain (loss) on disposal and sale of business interests |  | $ | (3) |  |  | $ | (192) |  |  | $ | (23) |  |  |
|  | Net income (loss) attributable to The AES Corporation |  | $ | (3) |  |  | $ | (192) |  |  | $ | (23) |  |  |
Derivative gains (losses), net |  |  |  |  |  |
|  | Non-regulated revenue |  | $ | (1) |  |  | $ | (1) |  |  | $ | (1) |  |  |
|  | Non-regulated cost of sales |  | 1 |  |  | (3) |  |  | (12) |  |  |
|  | Interest expense |  | (85) |  |  | (60) |  |  | (26) |  |  |
|  | Gain (loss) on disposal and sale of business interests |  | (362) |  |  | — |  |  | 1 |  |  |
|  | Asset impairment expense |  | (13) |  |  | (10) |  |  | — |  |  |
|  | Foreign currency transaction gains (losses) |  | (15) |  |  | (7) |  |  | (12) |  |  |
|  | Income (loss) from continuing operations before taxes and equity in earnings of affiliates |  | (475) |  |  | (81) |  |  | (50) |  |  |
|  | Income tax benefit (expense) |  | 105 |  |  | 17 |  |  | 13 |  |  |
|  | Net equity in earnings (losses) of affiliates |  | (17) |  |  | (10) |  |  | (5) |  |  |
|  | Income (loss) from continuing operations |  | (387) |  |  | (74) |  |  | (42) |  |  |
|  | Less: Net loss (income) attributable to noncontrolling interests and redeemable stock of subsidiaries |  | 133 |  |  | 2 |  |  | 6 |  |  |
|  | Net income (loss) attributable to The AES Corporation |  | $ | (254) |  |  | $ | (72) |  |  | $ | (36) |  |  |
Amortization of defined benefit pension actuarial losses, net |  |  |  |  |  |
|  | Regulated cost of sales |  | $ | — |  |  | $ | (1) |  |  | $ | — |  |  |
|  | Non-regulated cost of sales |  | (1) |  |  | 1 |  |  | — |  |  |
|  | Other expense |  | (3) |  |  | — |  |  | (2) |  |  |
|  | Gain (loss) on disposal and sale of business interests |  | — |  |  | — |  |  | (26) |  |  |
|  | Income (loss) from continuing operations before taxes and equity in earnings of affiliates |  | (4) |  |  | — |  |  | (28) |  |  |
|  | Income tax benefit (expense) |  | 3 |  |  | — |  |  | — |  |  |
|  | Income (loss) from continuing operations |  | (1) |  |  | — |  |  | (28) |  |  |
|  | Less: Income from continuing operations attributable to noncontrolling interests and redeemable stock of subsidiaries |  | — |  |  | — |  |  | 1 |  |  |
|  | Net income (loss) attributable to The AES Corporation |  | $ | (1) |  |  | $ | — |  |  | $ | (27) |  |  |
Total reclassifications for the period, net of income tax and noncontrolling interests |  | $ | (258) |  |  | $ | (264) |  |  | $ | (86) |  |  |

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