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Subsequent Event (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 15, 2014 | Feb. 20, 2015
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AES US Investment, Inc. |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Investment In Affiliate Ownership Percentage Sold | 15.00%aes_InvestmentInAffiliateOwnershipPercentageSold / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_AESUSInvestmentInc.Member |  |
Divestiture of Business, Purchase Purchase Subject Adjustment |  | $ 247 aes_DivestitureofBusinessPurchasePurchaseSubjectAdjustment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_AESUSInvestmentInc.Member |
Subsequent Event |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Stock Repurchase Program, Authorized Amount |  |  | $ 400 us-gaap_StockRepurchaseProgramAuthorizedAmount1 / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

X
- Definition Divestiture of Business, Purchase Purchase Adjustment + References No definition available. + Details
Name: | aes_DivestitureofBusinessPurchasePurchaseSubjectAdjustment
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The effective percentage of the affiliate's voting interest owned by the reporting entity (directly or indirectly) + References No definition available. + Details
Name: | aes_InvestmentInAffiliateOwnershipPercentageSold
Namespace Prefix: | aes_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=aes_AESUSInvestmentInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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