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Fair Value (Nonrecurring Unobservable Inputs) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Ebute
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Asset fair value nonrecurring	$ 36,000,000us-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	309,000,000us-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	36,000,000us-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		111,000,000us-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	$ 273,000,000us-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

X

- Details

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X

- Definition

Cost of Equity

+ References

No definition available.

+ Details

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Namespace Prefix:	aes_
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

Name:	aes_PretaxOperatingMarginInput
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_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=aes_EbuteMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: