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Debt (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2012
--- | ---
Nonrecourse Debt Default [Line Items] |
Default | $ 1,269
Sonel [Member] |
Nonrecourse Debt Default [Line Items] |
Net Assets | 318
Kelanitissa [Member] |
Nonrecourse Debt Default [Line Items] |
Net Assets | 50
Maritza [Member] |
Nonrecourse Debt Default [Line Items] |
Net Assets | 228
Saurashtra [Member] |
Nonrecourse Debt Default [Line Items] |
Net Assets | 16
Covenant Violation [Member] | Sonel [Member] |
Nonrecourse Debt Default [Line Items] |
Default | 318
Covenant Violation [Member] | Kelanitissa [Member] |
Nonrecourse Debt Default [Line Items] |
Default | 16
Covenant Violation [Member] | Maritza [Member] |
Nonrecourse Debt Default [Line Items] |
Default | 907
Covenant Violation [Member] | Saurashtra [Member] |
Nonrecourse Debt Default [Line Items] |
Default | $ 28

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- 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

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- Details
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Namespace Prefix: | aes_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The net of assets and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Paragraph 19 -Article 6 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 225 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09.6,7) -URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606914-122999 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 2 -Subparagraph (SX 210.6-05.4) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604008-122996 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 05 -Paragraph 4 -Article 6 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant