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Other Income and Expense (Other Expense) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Other Income and Expenses [Abstract] |  |  |
Loss on sale and disposal of assets | $ 47 aes_LossOnSaleAndDisposalOfAssets | $ 51 aes_LossOnSaleAndDisposalOfAssets | $ 64 aes_LossOnSaleAndDisposalOfAssets
Legal settlement | 11 aes_Legalsettlement | 9 aes_Legalsettlement | 9 aes_Legalsettlement
Contract termination | 0 aes_OtherExpenseContractTermination | 7 aes_OtherExpenseContractTermination | 0 aes_OtherExpenseContractTermination
Other | 10 us-gaap_OtherCostAndExpenseOperating | 9 us-gaap_OtherCostAndExpenseOperating | 9 us-gaap_OtherCostAndExpenseOperating
Total other expense | $ 68 us-gaap_OtherExpenses | $ 76 us-gaap_OtherExpenses | $ 82 us-gaap_OtherExpenses

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- Definition Legal settlement + References No definition available. + Details
Name: | aes_Legalsettlement
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of loss on the sale or disposal of assets. + References No definition available. + Details
Name: | aes_LossOnSaleAndDisposalOfAssets
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Other Expense related to the termination of a contract associated with exit from or disposal of business activities or restructurings pursuant to a plan + References No definition available. + Details
Name: | aes_OtherExpenseContractTermination
Namespace Prefix: | aes_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Article 5 + Details
Name: | us-gaap_OtherCostAndExpenseOperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition This element represents a sum total of expenses not separately reflected on the income statement for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 7 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.7) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4,6) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_OtherExpenses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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