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Schedule I - Condensed Financial Information of Parent (Guarantees and Letters of Credit) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items] |
Obligations maximum exposure, total | 552,000,000 aes_ObligationsMaximumExposureTotal
Obligations number of agreements | 31 aes_ObligationsNumberOfAgreements
Parent Company |
Condensed Financial Statements, Captions [Line Items] |
Letter of credit, fee range minimum | 0.20%aes_LetterOfCreditFeeRangeMinimum / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Letter of credit, fee range maximum | 2.50%aes_LetterOfCreditFeeRangeMaximum / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Guarantees |
Condensed Financial Statements, Captions [Line Items] |
Obligations maximum exposure, total | 390,000,000 aes_ObligationsMaximumExposureTotal / aes_ContingentContractualObligationsByTypeAxis = us-gaap_GuaranteesMember
Obligations number of agreements | 16 aes_ObligationsNumberOfAgreements / aes_ContingentContractualObligationsByTypeAxis = us-gaap_GuaranteesMember
Guarantees | Parent Company |
Condensed Financial Statements, Captions [Line Items] |
Obligations, Minimum Individual Exposures, Less Than Stated Amount | 1,000,000 aes_ObligationsMinimumIndividualExposuresLessThanStatedAmount / aes_ContingentContractualObligationsByTypeAxis = us-gaap_GuaranteesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Obligations, individual exposures (minimum less than $1 million) | 53,000,000 aes_ObligationsMaximumIndividualExposures / aes_ContingentContractualObligationsByTypeAxis = us-gaap_GuaranteesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Guarantees and Asset Sale Related Indemnities (Combined) [Member] |
Condensed Financial Statements, Captions [Line Items] |
Obligations number of agreements | 17 aes_ObligationsNumberOfAgreements / aes_ContingentContractualObligationsByTypeAxis = aes_GuaranteesandAssetSaleRelatedIndemnitiesCombinedMember
Guarantees and Asset Sale Related Indemnities (Combined) [Member] | Parent Company |
Condensed Financial Statements, Captions [Line Items] |
Obligations maximum exposure, total | 417,000,000 aes_ObligationsMaximumExposureTotal / aes_ContingentContractualObligationsByTypeAxis = aes_GuaranteesandAssetSaleRelatedIndemnitiesCombinedMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Letter of Credit |
Condensed Financial Statements, Captions [Line Items] |
Obligations number of agreements | 5 aes_ObligationsNumberOfAgreements / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember
Letters of credit outstanding | 61,000,000 us-gaap_LettersOfCreditOutstandingAmount / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember
Letter of Credit | Parent Company |
Condensed Financial Statements, Captions [Line Items] |
Obligations, Minimum Individual Exposures, Less Than Stated Amount | 1,000,000 aes_ObligationsMinimumIndividualExposuresLessThanStatedAmount / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Obligations, individual exposures (minimum less than $1 million) | 29,000,000 aes_ObligationsMaximumIndividualExposures / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Cash Collateralized Letters Of Credit |
Condensed Financial Statements, Captions [Line Items] |
Obligations maximum exposure, total | 74,000,000 aes_ObligationsMaximumExposureTotal / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember
Obligations number of agreements | 9 aes_ObligationsNumberOfAgreements / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember
Cash Collateralized Letters Of Credit | Parent Company |
Condensed Financial Statements, Captions [Line Items] |
Obligations maximum exposure, total | 74,000,000 aes_ObligationsMaximumExposureTotal / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Obligations, Minimum Individual Exposures, Less Than Stated Amount | 1,000,000 aes_ObligationsMinimumIndividualExposuresLessThanStatedAmount / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Obligations, individual exposures (minimum less than $1 million) | 47,000,000 aes_ObligationsMaximumIndividualExposures / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

X
- Definition The maximum of the per annum range of letter of credit fees as a percent of the outstanding amount. + References No definition available. + Details
Name: | aes_LetterOfCreditFeeRangeMaximum
Namespace Prefix: | aes_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum of the per annum range of letter of credit fees as a percent of the outstanding amount. + References No definition available. + Details
Name: | aes_LetterOfCreditFeeRangeMinimum
Namespace Prefix: | aes_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total maximum potential amount of future payments (undiscounted) the Parent Company could be required to make under the obligation or each group of similar obligations before reduction for potential recoveries under recourse or collateralization provisions. + References No definition available. + Details
Name: | aes_ObligationsMaximumExposureTotal
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Obligations, Maximum Individual Exposures + References No definition available. + Details
Name: | aes_ObligationsMaximumIndividualExposures
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Obligations, Minimum Individual Exposures, Less Than Stated Amount + References No definition available. + Details
Name: | aes_ObligationsMinimumIndividualExposuresLessThanStatedAmount
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of agreements under which the Parent Company has contingent contractual obligations. + References No definition available. + Details
Name: | aes_ObligationsNumberOfAgreements
Namespace Prefix: | aes_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_CondensedFinancialStatementsCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | aes_ContingentContractualObligationsByTypeAxis=aes_CashCollateralizedLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aes_ContingentContractualObligationsByTypeAxis=aes_GuaranteesandAssetSaleRelatedIndemnitiesCombinedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aes_ContingentContractualObligationsByTypeAxis=us-gaap_GuaranteesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aes_ContingentContractualObligationsByTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |