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Financing Receivables (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended
	Dec. 31, 2014 agreement MW	Dec. 31, 2013 agreement	Dec. 31, 2014
Schedule of Financing Receivables [Line Items]
Financing receivable	$ 293us-gaap_NotesReceivableNet	$ 184us-gaap_NotesReceivableNet	$ 293us-gaap_NotesReceivableNet
Number of Foninvemem Agreements	3aes_NumberofFoninvememAgreements
Foninvemem Agreement, collection period		10 years
Number of Foninvemem Agreements with active collections		2aes_NumberofFoninvememAgreementsWithActiveCollections
Generation Capacity Mega Watts, Commitment for Future Capacity, Mega Watts	93aes_GenerationCapacityMegaWattsCommitmentforFutureCapacityMegaWatts		93aes_GenerationCapacityMegaWattsCommitmentforFutureCapacityMegaWatts
ARGENTINA
Schedule of Financing Receivables [Line Items]
Financing receivable	278us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_AR	164us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_AR	278us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_AR
Financing Receivable, Gross		286us-gaap_NotesReceivableGross / us-gaap_StatementGeographicalAxis = country_AR
Noncurrent receivables		122us-gaap_NontradeReceivablesNoncurrent / us-gaap_StatementGeographicalAxis = country_AR
Derivative Assets, Gross	208us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset / us-gaap_StatementGeographicalAxis = country_AR	97us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset / us-gaap_StatementGeographicalAxis = country_AR	208us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset / us-gaap_StatementGeographicalAxis = country_AR
Interest Income, Other			59us-gaap_InterestIncomeOther / us-gaap_StatementGeographicalAxis = country_AR
Embedded Derivative, Gain on Embedded Derivative			106us-gaap_EmbeddedDerivativeGainOnEmbeddedDerivative / us-gaap_StatementGeographicalAxis = country_AR
Dominican Republic
Schedule of Financing Receivables [Line Items]
Financing receivable	0us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_DO	2us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_DO	0us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_DO
Brazil
Schedule of Financing Receivables [Line Items]
Financing receivable	15us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_BR	18us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_BR	15us-gaap_NotesReceivableNet / us-gaap_StatementGeographicalAxis = country_BR
Argentina
Schedule of Financing Receivables [Line Items]
Financing Receivable, Gross	$ 120us-gaap_NotesReceivableGross / aes_ContributedtoFinancingReceivablesAxis = aes_ArgentinaMember		$ 120us-gaap_NotesReceivableGross / aes_ContributedtoFinancingReceivablesAxis = aes_ArgentinaMember

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- Definition

Foninvemem Agreement, Collection Period

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Generation Capacity Mega Watts, Commitment for Future Capacity, Mega Watts

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Number of Foninvemem Agreements

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Number of Foninvemem Agreements With Active Collections

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- Definition

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

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- Definition

Increase in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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Amount of interest income earned from interest bearing assets not separately disclosed.

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The noncurrent portion of the receivable other than from customers, that is amounts expected to be collected after one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

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Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(3))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Subparagraph 3

-Article 9

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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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