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v2.4.1.9

Equity (Transactions with Noncontrolling Interests) (Details) (USD $) | 3 Months Ended | 12 Months Ended | 1 Months Ended | 0 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2014 | Jul. 15, 2014 | Jun. 30, 2014 | Dec. 15, 2014 | Jun. 25, 2014
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Net increase in The AES Corporation's paid-in capital for sale of subsidiary shares | $ 130,000,000 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest | $ 29,000,000 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest | $ 16,000,000 us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest |  |  |  |  |
Acquire addition shares through December 31, 2015 |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Investment Options, acquisition percentage |  |  |  | 2.00%aes_InvestmentOptionsacquisitionpercentage / aes_DominicanRepublicadditionalinvestmentoptionsAxis = aes_AcquireadditionsharesthroughDecember312015Member |  |  |  |
Acquire additional shares through December 31, 2016 |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Investment Options, acquisition percentage |  |  |  | 10.00%aes_InvestmentOptionsacquisitionpercentage / aes_DominicanRepublicadditionalinvestmentoptionsAxis = aes_AcquireadditionalsharesthroughDecember312016Member |  |  |  |
Dominican Republic |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 8.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = aes_DominicanRepublicMember | 8.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = aes_DominicanRepublicMember |  |  |  |  |  |
Proceeds from divestiture of business |  |  |  | 84,000,000 us-gaap_ProceedsFromDivestitureOfBusinesses / dei_LegalEntityAxis = aes_DominicanRepublicMember |  |  |  |
Gain on Disposition of Stock in Subsidiary, Recorded to APIC | 29,000,000 aes_GainonDispositionofStockinSubsidiaryRecordedtoAPIC / dei_LegalEntityAxis = aes_DominicanRepublicMember |  |  |  |  |  |  |
AES US Investment, Inc. |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Investment In Affiliate Ownership Percentage Sold | 15.00%aes_InvestmentInAffiliateOwnershipPercentageSold / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_AESUSInvestmentInc.Member | 15.00%aes_InvestmentInAffiliateOwnershipPercentageSold / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_AESUSInvestmentInc.Member |  |  |  |  |  |
Divestiture of Business, Purchase Purchase Subject Adjustment |  |  |  |  |  |  | 247,000,000 aes_DivestitureofBusinessPurchasePurchaseSubjectAdjustment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_AESUSInvestmentInc.Member |
Masinloc Subsidiary |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Proceeds from divestiture of business |  |  |  |  | 436,000,000 us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_MasinlocSubsidiaryMember |  |  |
Investment In Affiliate Ownership Percentage Sold |  |  |  |  |  |  |  | 45.00%aes_InvestmentInAffiliateOwnershipPercentageSold / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_MasinlocSubsidiaryMember
Divestiture of Business, Purchase Purchase Subject Adjustment |  |  |  |  |  |  |  | 453,000,000 aes_DivestitureofBusinessPurchasePurchaseSubjectAdjustment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_MasinlocSubsidiaryMember
Divestiture of Businesses, Portion Contingent Upon Achievement of Certain Restructuring Efficiencies |  |  |  |  | 23,000,000 aes_DivestitureofBusinessesPortionContingentUponAchievementofCertainRestructuringEfficiencies / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_MasinlocSubsidiaryMember |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  | 51.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_MasinlocSubsidiaryMember |  |  |
Masinloc Subsidiary | Electricity Generating Public Company Limited |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  | 41.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = aes_ElectricityGeneratingPublicCompanyLimitedMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_MasinlocSubsidiaryMember |  |  |
Masinloc Subsidiary | International Finance Corporation |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  | 8.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = aes_InternationalFinanceCorporationMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_MasinlocSubsidiaryMember |  |  |
IPALCO Enterprises, Inc. [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_IPALCOEnterprisesInc.Member | 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aes_IPALCOEnterprisesInc.Member |  |  |  |  |  |
Masinloc Subsidiary |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  |  |  |  |  | 283,000,000 us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_MasinlocSubsidiaryMember |  |
Acquire additional shares through 2016 |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 30.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / aes_AESUSInvestmentInc.AdditionalInvestmentOptionsAxis = aes_Acquireadditionalsharesthrough2016Member | 30.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / aes_AESUSInvestmentInc.AdditionalInvestmentOptionsAxis = aes_Acquireadditionalsharesthrough2016Member |  |  |  |  |  |
Investment Options, acquisition percentage | 17.65%aes_InvestmentOptionsacquisitionpercentage / aes_AESUSInvestmentInc.AdditionalInvestmentOptionsAxis = aes_Acquireadditionalsharesthrough2016Member |  |  |  |  |  |  |
Guacolda | Gener Subsidiary |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / invest_InvestmentAxis = aes_GuacoldaAffiliateMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = aes_GenerSubsidiaryMember | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / invest_InvestmentAxis = aes_GuacoldaAffiliateMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = aes_GenerSubsidiaryMember |  |  |  |  |  |
Acquire additional shares through 2016 | IPALCO Enterprises, Inc. [Member] |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Sale Agreement, Buyer Option To Purchase Ownership Interest, Sales Price | 349,000,000 aes_SaleAgreementBuyerOptionToPurchaseOwnershipInterestSalesPrice / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_IPALCOEnterprisesInc.Member / us-gaap_StatementScenarioAxis = aes_Acquireadditionalsharesthrough2016Member |  |  |  |  |  |  |
Acquire addition shares through December 31, 2015 | Dominican Republic |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Sale Agreement, Buyer Option To Purchase Ownership Interest, Sales Price |  |  |  | 24,000,000 aes_SaleAgreementBuyerOptionToPurchaseOwnershipInterestSalesPrice / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_DominicanRepublicMember / us-gaap_StatementScenarioAxis = aes_AcquireadditionsharesthroughDecember312015Member |  |  |  |
Acquire additional shares through December 31, 2016 | Dominican Republic |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |
Sale Agreement, Buyer Option To Purchase Ownership Interest, Sales Price |  |  |  | 125,000,000 aes_SaleAgreementBuyerOptionToPurchaseOwnershipInterestSalesPrice / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = aes_DominicanRepublicMember / us-gaap_StatementScenarioAxis = aes_AcquireadditionalsharesthroughDecember312016Member |  |  |  |

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