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Debt (Subsidiary Non-Recourse Debt in Default or Accelerated) (Details) $ in Millions	Dec. 31, 2017 USD ($)
Debt Details [Line Items]
Debt default amount	$ 1,019
Alto Maipo [Member] | Covenant Violation
Debt Details [Line Items]
Non-Recourse Debt	618
PUERTO RICO | Covenant Violation
Debt Details [Line Items]
Debt default amount	365
Non-Recourse Debt	365
AES Ilumina [Member] | Covenant Violation
Debt Details [Line Items]
Non-Recourse Debt	36
Net Assets, Segment [Member] | Alto Maipo [Member]
Debt Details [Line Items]
Non-Recourse Debt	352
Net Assets, Segment [Member] | PUERTO RICO
Debt Details [Line Items]
Non-Recourse Debt	692
Net Assets, Segment [Member] | AES Ilumina [Member]
Debt Details [Line Items]
Non-Recourse Debt	$ 54

X

- Definition

Amount of outstanding debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured.

+ References

No definition available.

+ Details

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Namespace Prefix:	aes_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

-- None. No documentation exists for this element. --

+ References

No definition available.

+ Details

Name:	aes_DebtDetailsLineItems
Namespace Prefix:	aes_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(c))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	aes_DebtDefaultBySubsidiaryAxis=aes_AltoMaipoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	aes_TypeOfDebtDefaultAxis=aes_CovenantViolationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	aes_DebtDefaultBySubsidiaryAxis=aes_AESPuertoRicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	aes_DebtDefaultBySubsidiaryAxis=aes_AESIluminaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_NetAssetsSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: