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Fair Value (Nonrecurring Unobservable Inputs) (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Ebute |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Asset fair value nonrecurring | $ 36,000,000 us-gaap_AssetsFairValueDisclosureNonrecurring / dei_LegalEntityAxis = aes_EbuteMember |
Discounted Cash Flow | Minimum | Long Lived Assets Held And Used | Ebute |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Annual Revenue Growth Input | 0.00%aes_AnnualRevenueGrowthInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = aes_LongLivedAssetsHeldAndUsedMember / dei_LegalEntityAxis = aes_EbuteMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Pretax Operating Margin Input | 0.00%aes_PretaxOperatingMarginInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = aes_LongLivedAssetsHeldAndUsedMember / dei_LegalEntityAxis = aes_EbuteMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Discounted Cash Flow | Minimum | Equity Method Affiliate | Silver Ridge Power |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Annual Revenue Growth Input | (57.00%)aes_AnnualRevenueGrowthInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Pretax Operating Margin Input | (115.00%)aes_PretaxOperatingMarginInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Cost of Equity | 13.00%aes_FairValueInputsCostofEquity / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Discounted Cash Flow | Maximum | Long Lived Assets Held And Used | Ebute |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Annual Revenue Growth Input | 1.00%aes_AnnualRevenueGrowthInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = aes_LongLivedAssetsHeldAndUsedMember / dei_LegalEntityAxis = aes_EbuteMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Pretax Operating Margin Input | 56.00%aes_PretaxOperatingMarginInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = aes_LongLivedAssetsHeldAndUsedMember / dei_LegalEntityAxis = aes_EbuteMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Discounted Cash Flow | Maximum | Equity Method Affiliate | Silver Ridge Power |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Annual Revenue Growth Input | 1.00%aes_AnnualRevenueGrowthInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Pretax Operating Margin Input | 50.00%aes_PretaxOperatingMarginInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Cost of Equity | 16.00%aes_FairValueInputsCostofEquity / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
Discounted Cash Flow | Weighted Average | Long Lived Assets Held And Used | Ebute |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Annual Revenue Growth Input | 1.00%aes_AnnualRevenueGrowthInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = aes_LongLivedAssetsHeldAndUsedMember / dei_LegalEntityAxis = aes_EbuteMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember |
Pretax Operating Margin Input | 25.00%aes_PretaxOperatingMarginInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = aes_LongLivedAssetsHeldAndUsedMember / dei_LegalEntityAxis = aes_EbuteMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember |
Discounted Cash Flow | Weighted Average | Equity Method Affiliate | Silver Ridge Power |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Annual Revenue Growth Input | (4.00%)aes_AnnualRevenueGrowthInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember |
Pretax Operating Margin Input | 6.00%aes_PretaxOperatingMarginInput / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember |
Cost of Equity | 14.00%aes_FairValueInputsCostofEquity / aes_FairValueAssetsMeasuredOnNonrecurringBasisUnobservableInputsAxis = aes_DiscountedCashFlowMember / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember |
Fair Value | Level 3 |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Asset fair value nonrecurring | 309,000,000 us-gaap_AssetsFairValueDisclosureNonrecurring / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember |
Fair Value | Level 3 | Long Lived Assets Held And Used | Ebute |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Asset fair value nonrecurring | 36,000,000 us-gaap_AssetsFairValueDisclosureNonrecurring / aes_FairValueByAssetTypeAxis = aes_LongLivedAssetsHeldAndUsedMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = aes_EbuteMember |
Fair Value | Level 3 | Equity Method Affiliate |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Asset fair value nonrecurring |  | 111,000,000 us-gaap_AssetsFairValueDisclosureNonrecurring / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Fair Value | Level 3 | Equity Method Affiliate | Silver Ridge Power |  |
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items] |  |
Asset fair value nonrecurring | $ 273,000,000 us-gaap_AssetsFairValueDisclosureNonrecurring / aes_FairValueByAssetTypeAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / dei_LegalEntityAxis = aes_SilverRidgePowerMember |

X
- Definition Annual revenue growth used in forecasting cash flows. + References No definition available. + Details
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Namespace Prefix: | aes_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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- Definition Cost of Equity + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Pretax operating margin used in projecting cash flows. + References No definition available. + Details
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Namespace Prefix: | aes_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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_
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- Details
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X
- Details
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