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Subsequent Event (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 15, 2014
Feb. 20, 2015
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   $ 247aes_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     $ 400us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember