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v3.20.1

Subsequent Events (Details) - Subsequent Event [Member] $ in Millions | 3 Months Ended
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Jun. 30, 2020 USD ($)
Subsequent Event [Line Items] |
Capital Contribution to Project | $ 335
Gener Subsidiary [Member] |
Subsequent Event [Line Items] |
Capital Contribution to Project | $ 500

X
- Definition Capital Contribution to Project + References No definition available. + Details
Name: | aes_CapitalContributiontoProject
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aes_GenerSubsidiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |