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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2021
Revenue from Contracts with Customers [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following table presents our revenue from contracts with customers and other revenue for the periods indicated (in millions):
| Three Months Ended March 31, 2021
| US and Utilities SBU |  | South America SBU |  | MCAC SBU |  | Eurasia SBU |  | Corporate, Other and Eliminations |  | Total
Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 698 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 698 |
Other regulated revenue | 9 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 9 |
Total regulated revenue | 707 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 707 |
Non-Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | 224 |  |  | 883 |  |  | 510 |  |  | 209 |  |  | (3) |  |  | 1,823 |
Other non-regulated revenue (1) | 18 |  |  | 1 |  |  | 25 |  |  | 61 |  |  | — |  |  | 105 |
Total non-regulated revenue | 242 |  |  | 884 |  |  | 535 |  |  | 270 |  |  | (3) |  |  | 1,928 |
Total revenue | $ | 949 |  |  | $ | 884 |  |  | $ | 535 |  |  | $ | 270 |  |  | $ | (3) |  |  | $ | 2,635 |
| Three Months Ended March 31, 2020
| US and Utilities SBU |  | South America SBU |  | MCAC SBU |  | Eurasia SBU |  | Corporate, Other and Eliminations |  | Total
Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 703 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 703 |
Other regulated revenue | 9 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 9 |
Total regulated revenue | 712 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 712 |
Non-Regulated Revenue |  |  |  |  |  |  |  |  |  |  |
Revenue from contracts with customers | 163 |  |  | 711 |  |  | 408 |  |  | 171 |  |  | (2) |  |  | 1,451 |
Other non-regulated revenue (1) | 96 |  |  | 1 |  |  | 24 |  |  | 54 |  |  | — |  |  | 175 |
Total non-regulated revenue | 259 |  |  | 712 |  |  | 432 |  |  | 225 |  |  | (2) |  |  | 1,626 |
Total revenue | $ | 971 |  |  | $ | 712 |  |  | $ | 432 |  |  | $ | 225 |  |  | $ | (2) |  |  | $ | 2,338 |

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- Definition Revenue from Contracts with Customers [Abstract] + References No definition available. + Details
Name: | aes_RevenuefromContractswithCustomersAbstract
Namespace Prefix: | aes_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
Name: | us-gaap_DisaggregationOfRevenueTableTextBlock
Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration