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Investments In and Advances To Affiliates - Summary of Financial Information of Affiliates & Subsidiaries (Details) (USD $)
12 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Apr. 11, 2014
Jul. 02, 2014
Jul. 01, 2014
Dec. 31, 2014
Oct. 13, 2014
Sep. 30, 2014
Sep. 30, 2014
Investments in and Advances to Affiliates [Line Items]                    
Gain (Loss) on Disposition of Business $ 358,000,000us-gaap_GainLossOnSaleOfBusiness $ 26,000,000us-gaap_GainLossOnSaleOfBusiness $ 219,000,000us-gaap_GainLossOnSaleOfBusiness              
Other non-operating expense 128,000,000us-gaap_OtherNonoperatingExpense 129,000,000us-gaap_OtherNonoperatingExpense 50,000,000us-gaap_OtherNonoperatingExpense              
Payments to Acquire Businesses and Interest in Affiliates 728,000,000us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates 7,000,000us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates 20,000,000us-gaap_PaymentsToAcquireBusinessesAndInterestInAffiliates              
Proceeds from the sale of businesses, net of cash sold 1,807,000,000us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates 170,000,000us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates 639,000,000us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates              
Net equity in earnings of affiliates 19,000,000us-gaap_IncomeLossFromEquityMethodInvestments 25,000,000us-gaap_IncomeLossFromEquityMethodInvestments 35,000,000us-gaap_IncomeLossFromEquityMethodInvestments              
Global Infrastructure Partners                    
Investments in and Advances to Affiliates [Line Items]                    
Proceeds from the sale of businesses, net of cash sold       730,000,000us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= aes_GlobalInfrastructurePartnersMember
           
Silver Ridge Power                    
Investments in and Advances to Affiliates [Line Items]                    
Equity Method Investment, Ownership Percentage         50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
         
Equity Method Investment, Purchase Price Agreement         179,000,000aes_EquityMethodInvestmentPurchasePriceAgreement
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
         
Investment In Affiliate Ownership Percentage 0.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
50.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
        0.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
     
Other non-operating expense 42,000,000us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
0us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
0us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
             
Equity Method Investment, Other than Temporary Impairment 42,000,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ invest_InvestmentAxis
= aes_SilverRidgePowerMember
                 
Silver Ridge - Italy                    
Investments in and Advances to Affiliates [Line Items]                    
Equity Method Investment, Ownership Percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ invest_InvestmentAxis
= aes_SilverRidgeItalyMember
          50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ invest_InvestmentAxis
= aes_SilverRidgeItalyMember
     
Equity Method Investment, Purchase Price Agreement           42,000,000aes_EquityMethodInvestmentPurchasePriceAgreement
/ invest_InvestmentAxis
= aes_SilverRidgeItalyMember
       
Silver Ridge- Italy and Spain                    
Investments in and Advances to Affiliates [Line Items]                    
Equity method Investment balance reclassed to Other noncurrent assets 64,000,000aes_EquitymethodInvestmentbalancereclassedtoOthernoncurrentassets
/ invest_InvestmentAxis
= aes_SilverRidgeItalyandSpainMember
          64,000,000aes_EquitymethodInvestmentbalancereclassedtoOthernoncurrentassets
/ invest_InvestmentAxis
= aes_SilverRidgeItalyandSpainMember
  32,000,000aes_EquitymethodInvestmentbalancereclassedtoOthernoncurrentassets
/ invest_InvestmentAxis
= aes_SilverRidgeItalyandSpainMember
32,000,000aes_EquitymethodInvestmentbalancereclassedtoOthernoncurrentassets
/ invest_InvestmentAxis
= aes_SilverRidgeItalyandSpainMember
Accumulated other comprehensive income reclassed to other noncurrent assets                 40,000,000aes_Accumulatedothercomprehensiveincomereclassedtoothernoncurrentassets
/ invest_InvestmentAxis
= aes_SilverRidgeItalyandSpainMember
40,000,000aes_Accumulatedothercomprehensiveincomereclassedtoothernoncurrentassets
/ invest_InvestmentAxis
= aes_SilverRidgeItalyandSpainMember
Barry                    
Investments in and Advances to Affiliates [Line Items]                    
Investment In Affiliate Ownership Percentage 100.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_BarryAffiliateMember
100.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_BarryAffiliateMember
        100.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_BarryAffiliateMember
     
Long Term Liabilities Associated With Debt Agreement Resulting In Loss Of Control 52,000,000aes_LongTermLiabilitiesAssociatedWithDebtAgreementResultingInLossOfControl
/ invest_InvestmentAxis
= aes_BarryAffiliateMember
55,000,000aes_LongTermLiabilitiesAssociatedWithDebtAgreementResultingInLossOfControl
/ invest_InvestmentAxis
= aes_BarryAffiliateMember
        52,000,000aes_LongTermLiabilitiesAssociatedWithDebtAgreementResultingInLossOfControl
/ invest_InvestmentAxis
= aes_BarryAffiliateMember
     
Elsta                    
Investments in and Advances to Affiliates [Line Items]                    
Equity Method Investment, Ownership Percentage               50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ invest_InvestmentAxis
= aes_ElstaMember
   
Investment In Affiliate Ownership Percentage 50.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_ElstaMember
50.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_ElstaMember
        50.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_ElstaMember
     
Impaired Long-Lived Assets Held and Used, Facts and Circumstances Leading to Impairment 82,000,000aes_ImpairmentofLongLivedAssetsRecognizedEquityAffiliateLevel
/ invest_InvestmentAxis
= aes_ElstaMember
                 
Other non-operating expense 0us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_ElstaMember
129,000,000us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_ElstaMember
0us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_ElstaMember
             
Net equity in earnings of affiliates 41,000,000us-gaap_IncomeLossFromEquityMethodInvestments
/ invest_InvestmentAxis
= aes_ElstaMember
          (41,000,000)us-gaap_IncomeLossFromEquityMethodInvestments
/ invest_InvestmentAxis
= aes_ElstaMember
     
Entek                    
Investments in and Advances to Affiliates [Line Items]                    
Equity Method Investment, Ownership Percentage               49.62%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ invest_InvestmentAxis
= aes_EntekMember
   
Equity Method Investment, Purchase Price Agreement               125,000,000aes_EquityMethodInvestmentPurchasePriceAgreement
/ invest_InvestmentAxis
= aes_EntekMember
125,000,000aes_EquityMethodInvestmentPurchasePriceAgreement
/ invest_InvestmentAxis
= aes_EntekMember
 
Investment In Affiliate Ownership Percentage 0.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_EntekMember
50.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_EntekMember
        0.00%aes_InvestmentInAffiliateOwnershipPercentage
/ invest_InvestmentAxis
= aes_EntekMember
     
Gain (Loss) on Disposition of Business             4,000,000us-gaap_GainLossOnSaleOfBusiness
/ invest_InvestmentAxis
= aes_EntekMember
     
Other non-operating expense 86,000,000us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_EntekMember
0us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_EntekMember
0us-gaap_OtherNonoperatingExpense
/ invest_InvestmentAxis
= aes_EntekMember
             
Equity Method Investment, Other than Temporary Impairment               $ 68,000,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ invest_InvestmentAxis
= aes_EntekMember
$ 86,000,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ invest_InvestmentAxis
= aes_EntekMember
$ 18,000,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ invest_InvestmentAxis
= aes_EntekMember