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Contingencies and Commitments (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 agreement
Guarantees Letters Of Credit [Abstract] |  |
The range of expiration dates of guarantees made by the Parent Company | less than one year to more than 20 years |
Lower limit of expiration dates of guarantees (less than one year) | 1 year |
Upper limit of expiration dates of guarantees (more than 20 years) | 20 years |
Obligations made by the Parent Company associated with non-recourse debt | $ 24 aes_ContingentContractualObligationsAssociatedWithNonrecourseDebt |
Contingent Contractual Obligations [Line Items] |  |
Amount | 525 aes_ObligationsMaximumExposureTotal |
Number of Agreements | 32 aes_ObligationsNumberOfAgreements |
Guarantees and commitments |  |
Contingent Contractual Obligations [Line Items] |  |
Amount | 365 aes_ObligationsMaximumExposureTotal / aes_ContingentContractualObligationsByTypeAxis = us-gaap_GuaranteesMember |
Number of Agreements | 15 aes_ObligationsNumberOfAgreements / aes_ContingentContractualObligationsByTypeAxis = us-gaap_GuaranteesMember |
Maximum Exposure Range for Each Agreement | $1 — 53 |
Maximum exposure range, upper limit | 53 aes_GuarantorObligationsMaximumExposureRangeUpperLimit / aes_ContingentContractualObligationsByTypeAxis = us-gaap_GuaranteesMember |
Maximum Exposure range, lower limit | 1 aes_MaximumExposurerangelowerlimit / aes_ContingentContractualObligationsByTypeAxis = us-gaap_GuaranteesMember |
Asset sale related indemnities(1) |  |
Contingent Contractual Obligations [Line Items] |  |
Amount | 27 aes_ObligationsMaximumExposureTotal / aes_ContingentContractualObligationsByTypeAxis = aes_AssetSaleRelatedIndemnitiesMember | [1]
Number of Agreements | 1 aes_ObligationsNumberOfAgreements / aes_ContingentContractualObligationsByTypeAxis = aes_AssetSaleRelatedIndemnitiesMember | [1]
Maximum Exposure Range for Each Agreement | 27 | [1]
Maximum exposure range, upper limit | 27 aes_GuarantorObligationsMaximumExposureRangeUpperLimit / aes_ContingentContractualObligationsByTypeAxis = aes_AssetSaleRelatedIndemnitiesMember |
Maximum Exposure range, lower limit | 27 aes_MaximumExposurerangelowerlimit / aes_ContingentContractualObligationsByTypeAxis = aes_AssetSaleRelatedIndemnitiesMember |
Cash collateralized letters of credit |  |
Contingent Contractual Obligations [Line Items] |  |
Amount | 72 aes_ObligationsMaximumExposureTotal / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember |
Number of Agreements | 9 aes_ObligationsNumberOfAgreements / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember |
Maximum Exposure Range for Each Agreement | <$1 — 44 |
Maximum exposure range, lower limit (less than $1) | 1 aes_GuarantorObligationsMaximumExposureRangeLowerLimit / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember |
Maximum exposure range, upper limit | 44 aes_GuarantorObligationsMaximumExposureRangeUpperLimit / aes_ContingentContractualObligationsByTypeAxis = aes_CashCollateralizedLettersOfCreditMember |
Letters of credit under the senior secured credit facility |  |
Contingent Contractual Obligations [Line Items] |  |
Amount | 61 aes_ObligationsMaximumExposureTotal / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember |
Number of Agreements | 7 aes_ObligationsNumberOfAgreements / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember |
Maximum Exposure Range for Each Agreement | <$1 — 29 |
Maximum exposure range, lower limit (less than $1) | 1 aes_GuarantorObligationsMaximumExposureRangeLowerLimit / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember |
Maximum exposure range, upper limit | $ 29 aes_GuarantorObligationsMaximumExposureRangeUpperLimit / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember |
Letters of credit under the senior secured credit facility | Minimum [Member] |  |
Contingent Contractual Obligations [Line Items] |  |
Letter of credit fee percentage paid | 0.20%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Letters of credit under the senior secured credit facility | Maximum [Member] |  |
Contingent Contractual Obligations [Line Items] |  |
Letter of credit fee percentage paid | 2.50%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / aes_ContingentContractualObligationsByTypeAxis = us-gaap_LetterOfCreditMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
[1] | (1) Excludes normal and customary representations and warranties in agreements for the sale of assets (including ownership in associated legal entities) where the associated risk is considered to be nominal.

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- Definition Contingent contractual obligations made by the Parent Company for the direct benefit of the lenders associated with the non-recourse debt of subsidiary businesses. + References No definition available. + Details
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- Details
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- Details
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- Definition Guarantor Obligations, Expiration Dates, Lower Limit + References No definition available. + Details
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- Definition Guarantor Obligations, Expiration Dates, Upper Limit + References No definition available. + Details
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- Definition Guarantor Obligations, Maximum Exposure Range, Lower Limit + References No definition available. + Details
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- Definition Guarantor Obligations, Maximum Exposure Range, Upper Limit + References No definition available. + Details
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- Definition Maximum Exposure range, lower limit + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Range of maximum exposures (in millions) for the individual agreements under which the Parent Company has contingent contractual obligations. + References No definition available. + Details
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- 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
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- Definition Number of agreements under which the Parent Company has contingent contractual obligations. + References No definition available. + Details
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- Definition Describe the approximate term of the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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- Details
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