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Earnings Per Share (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
BASIC EARNINGS PER SHARE    
Income (loss) from continuing operations attributable to The AES Corporation common stockholders (Income) $ 142us-gaap_IncomeLossFromContinuingOperations $ (47)us-gaap_IncomeLossFromContinuingOperations
Income (loss) from continuing operations attributable to The AES Corporation common stockholders (Shares) 704us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 724us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 0.20us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ (0.07)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Restricted stock units (Shares) 2us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Diluted Earnings Per Share (Income) $ 142aes_IncomeLossFromContinuingOperationsDiluted $ (47)aes_IncomeLossFromContinuingOperationsDiluted
Diluted Earnings Per Share (Shares) 706us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 724us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted Earnings Per Share $ 0.20us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ (0.07)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Income (Loss) from Continuing Operations, Per Diluted Share $ 0.20us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ (0.07)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Earnings Per Share, Diluted $ 0.20us-gaap_EarningsPerShareDiluted $ (0.08)us-gaap_EarningsPerShareDiluted
Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 4us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
5us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Restricted Stock Units (RSUs) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember
2us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember
Convertible Debt Securities [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 15us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_ConvertibleDebtSecuritiesMember
15us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_ConvertibleDebtSecuritiesMember