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Debt (Non-recourse Debt Narrative) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Debt Instrument [Line Items] |  |
Construction line of credit facility remaining borrowing capacity | $ 2,300,000,000 aes_ConstructionLineOfCreditFacilityRemainingBorrowingCapacity |
Other line of credit remaining borrowing capacity | 2,400,000,000 aes_OtherLineOfCreditFacilityRemainingBorrowingCapacity |
Restricted cash and debt service reserves | 245,000,000 aes_RestrictedCashAndDebtServiceReserves | 492,000,000 aes_RestrictedCashAndDebtServiceReserves
Restricted net assets | 2,700,000,000 aes_RestrictedNetAssets |
Increase (Decrease) in Interest Expense, Debt | (48,000,000)aes_IncreaseDecreaseinInterestExpenseDebt | (34,000,000)aes_IncreaseDecreaseinInterestExpenseDebt
Non-Recourse Debt | Mong Duong Subsidiary | Construction Loans |  |
Debt Instrument [Line Items] |  |
Debt face amount | 364,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = us-gaap_ConstructionLoansMember / dei_LegalEntityAxis = aes_MongDuongSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Angamos |  |
Debt Instrument [Line Items] |  |
Debt face amount | 800,000,000 us-gaap_DebtInstrumentFaceAmount / dei_LegalEntityAxis = aes_AngamosMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Repayments of long-term debt | 780,000,000 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = aes_AngamosMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Gener Subsidiary |  |
Debt Instrument [Line Items] |  |
Debt face amount | 700,000,000 us-gaap_DebtInstrumentFaceAmount / dei_LegalEntityAxis = aes_GenerSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Repayments of long-term debt | 905,000,000 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = aes_GenerSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | US Generation Holdings |  |
Debt Instrument [Line Items] |  |
Debt face amount | 299,000,000 us-gaap_DebtInstrumentFaceAmount / dei_LegalEntityAxis = aes_USGenerationHoldingsMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Electropaulo |  |
Debt Instrument [Line Items] |  |
Debt face amount | 253,000,000 us-gaap_DebtInstrumentFaceAmount / dei_LegalEntityAxis = aes_ElectropauloMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Repayments of long-term debt | 110,000,000 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = aes_ElectropauloMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | DPL Subsidiary |  |
Debt Instrument [Line Items] |  |
Debt face amount | 200,000,000 us-gaap_DebtInstrumentFaceAmount / dei_LegalEntityAxis = aes_DplSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Repayments of long-term debt | 364,000,000 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = aes_DplSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Tiete Subsidiary |  |
Debt Instrument [Line Items] |  |
Debt face amount | 318,000,000 us-gaap_DebtInstrumentFaceAmount / dei_LegalEntityAxis = aes_TieteSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Repayments of long-term debt | 132,000,000 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = aes_TieteSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Cochrane Subsidiary | Construction Loans |  |
Debt Instrument [Line Items] |  |
Debt face amount | 305,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = us-gaap_ConstructionLoansMember / dei_LegalEntityAxis = aes_CochraneSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Sul Subsidiary |  |
Debt Instrument [Line Items] |  |
Debt face amount | 185,000,000 us-gaap_DebtInstrumentFaceAmount / dei_LegalEntityAxis = aes_SulSubsidiaryMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Southland |  |
Debt Instrument [Line Items] |  |
Repayments of long-term debt | 188,000,000 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = aes_SouthlandMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Chivor |  |
Debt Instrument [Line Items] |  |
Repayments of long-term debt | 165,000,000 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = aes_ChivorMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | UK Wind |  |
Debt Instrument [Line Items] |  |
Repayments of long-term debt | 114,000,000 us-gaap_RepaymentsOfLongTermDebt / dei_LegalEntityAxis = aes_UKWindNewfieldMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |
Non-Recourse Debt | Warrior Run | Construction Loans |  |
Debt Instrument [Line Items] |  |
Debt face amount | $ 109,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = us-gaap_ConstructionLoansMember / dei_LegalEntityAxis = aes_WarriorRunMember / us-gaap_LongtermDebtTypeAxis = aes_NonrecourseDebtMember |

X
- Definition Amount of borrowing capacity currently available under credit facilities at subsidiaries with facilities under construction (current borrowing capacity less the amount of borrowings outstanding) to fund construction and other related costs + References No definition available. + Details
Name: | aes_ConstructionLineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Increase (Decrease) in Interest Expense, Debt + References No definition available. + Details
Name: | aes_IncreaseDecreaseinInterestExpenseDebt
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of borrowing capacity currently available under credit facilities at subsidiaries (current borrowing capacity less the amount of borrowings outstanding) for general business use, including to support working capital, debt service reserves and other business needs excluding construction + References No definition available. + Details
Name: | aes_OtherLineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total current and noncurrent amount of restricted cash maintained under in accordance with certain covenants of existing debt agreements + References No definition available. + Details
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Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of net assets of subsidiaries restricted under various lender and governmental provisions that restrict the ability of the subsidiaries to transfer net assets to the parent company + References No definition available. + Details
Name: | aes_RestrictedNetAssets
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

X
- Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
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