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Asset Impairment Expense (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Asset Impairment Expense [Line Items] |  |
Impairment of Long-Lived Assets Held-for-use | $ 8 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse | $ 12 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
East Bend DPL [Member] |  |
Asset Impairment Expense [Line Items] |  |
Impairment of Long-Lived Assets Held-for-use | 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse / dei_LegalEntityAxis = aes_EastBendDPLMember | 12 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse / dei_LegalEntityAxis = aes_EastBendDPLMember
Generation capacity mega watts |  | 186 aes_GenerationCapacityMegaWatts / dei_LegalEntityAxis = aes_EastBendDPLMember
Assets, fair value |  | 2 us-gaap_AssetsFairValueDisclosureNonrecurring / dei_LegalEntityAxis = aes_EastBendDPLMember
Other Impairment [Member] |  |
Asset Impairment Expense [Line Items] |  |
Impairment of Long-Lived Assets Held-for-use | $ 8 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse / dei_LegalEntityAxis = aes_OtherImpairmentMember | $ 0 us-gaap_ImpairmentOfLongLivedAssetsHeldForUse / dei_LegalEntityAxis = aes_OtherImpairmentMember

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- Definition Generation Capacity Mega Watts + References No definition available. + Details
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Balance Type: | na
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28367520&loc=d3e92212-112881 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Impairment -URI http://asc.fasb.org/extlink&oid=6515133 + Details
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Balance Type: | debit
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |