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Debt (Subsidiary Non-Recourse Debt in Default or Accelerated) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Debt Details [Line Items]  
Debt default amount $ 858aes_DebtDefaultAmount
Maritza  
Debt Details [Line Items]  
Net assets 581us-gaap_AssetsNet
/ aes_DebtDefaultBySubsidiaryAxis
= aes_MaritzaMember
Maritza | Covenant Violation  
Debt Details [Line Items]  
Debt default amount 690aes_DebtDefaultAmount
/ aes_DebtDefaultBySubsidiaryAxis
= aes_MaritzaMember
/ aes_TypeOfDebtDefaultAxis
= aes_CovenantViolationMember
Kavarna  
Debt Details [Line Items]  
Net assets 75us-gaap_AssetsNet
/ aes_DebtDefaultBySubsidiaryAxis
= aes_KavarnaMember
Kavarna | Covenant Violation  
Debt Details [Line Items]  
Debt default amount $ 168aes_DebtDefaultAmount
/ aes_DebtDefaultBySubsidiaryAxis
= aes_KavarnaMember
/ aes_TypeOfDebtDefaultAxis
= aes_CovenantViolationMember