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Property, Plant and Equipment (Ownership of Coal-Fired Facilities) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 MW facility
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Jointly Owned Utility Plant Interests [Line Items] |
Number of Coal-Fired Generation Facilities, Jointly Owned | 5 aes_NumberofCoalFiredGenerationFacilitiesJointlyOwned
Production Capacity (MW) | 2,072 aes_GenerationCapacityMegaWatts
Conesville Unit 4 |
Jointly Owned Utility Plant Interests [Line Items] |
Construction Work In Process | 1 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ConesvilleUnit4Member
Ownership | 17.00%us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ConesvilleUnit4Member
Production Capacity (MW) | 129 aes_GenerationCapacityMegaWatts / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ConesvilleUnit4Member
Gross Plant In Service | 24 us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ConesvilleUnit4Member
Accumulated Depreciation | 2 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ConesvilleUnit4Member
Killen Station |
Jointly Owned Utility Plant Interests [Line Items] |
Construction Work In Process | 2 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress / us-gaap_JointlyOwnedUtilityPlantAxis = aes_KillenStationMember
Ownership | 67.00%us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare / us-gaap_JointlyOwnedUtilityPlantAxis = aes_KillenStationMember
Production Capacity (MW) | 402 aes_GenerationCapacityMegaWatts / us-gaap_JointlyOwnedUtilityPlantAxis = aes_KillenStationMember
Gross Plant In Service | 308 us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService / us-gaap_JointlyOwnedUtilityPlantAxis = aes_KillenStationMember
Accumulated Depreciation | 19 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation / us-gaap_JointlyOwnedUtilityPlantAxis = aes_KillenStationMember
Miami Fort Units 7 and 8 |
Jointly Owned Utility Plant Interests [Line Items] |
Construction Work In Process | 2 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress / us-gaap_JointlyOwnedUtilityPlantAxis = aes_MiamiFortUnits7And8Member
Ownership | 36.00%us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare / us-gaap_JointlyOwnedUtilityPlantAxis = aes_MiamiFortUnits7And8Member
Production Capacity (MW) | 368 aes_GenerationCapacityMegaWatts / us-gaap_JointlyOwnedUtilityPlantAxis = aes_MiamiFortUnits7And8Member
Gross Plant In Service | 214 us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService / us-gaap_JointlyOwnedUtilityPlantAxis = aes_MiamiFortUnits7And8Member
Accumulated Depreciation | 23 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation / us-gaap_JointlyOwnedUtilityPlantAxis = aes_MiamiFortUnits7And8Member
Stuart Station |
Jointly Owned Utility Plant Interests [Line Items] |
Construction Work In Process | 14 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress / us-gaap_JointlyOwnedUtilityPlantAxis = aes_StuartStationMember
Ownership | 35.00%us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare / us-gaap_JointlyOwnedUtilityPlantAxis = aes_StuartStationMember
Production Capacity (MW) | 808 aes_GenerationCapacityMegaWatts / us-gaap_JointlyOwnedUtilityPlantAxis = aes_StuartStationMember
Gross Plant In Service | 219 us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService / us-gaap_JointlyOwnedUtilityPlantAxis = aes_StuartStationMember
Accumulated Depreciation | 16 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation / us-gaap_JointlyOwnedUtilityPlantAxis = aes_StuartStationMember
Zimmer Station |
Jointly Owned Utility Plant Interests [Line Items] |
Construction Work In Process | 6 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ZimmerStationMember
Ownership | 28.00%us-gaap_JointlyOwnedUtilityPlantProportionateOwnershipShare / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ZimmerStationMember
Production Capacity (MW) | 365 aes_GenerationCapacityMegaWatts / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ZimmerStationMember
Gross Plant In Service | 182 us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ZimmerStationMember
Accumulated Depreciation | 35 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation / us-gaap_JointlyOwnedUtilityPlantAxis = aes_ZimmerStationMember
Transmission |
Jointly Owned Utility Plant Interests [Line Items] |
Construction Work In Process | 0 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress / us-gaap_JointlyOwnedUtilityPlantAxis = us-gaap_JointlyOwnedElectricityTransmissionAndDistributionSystemMember
Production Capacity (MW) | 0 aes_GenerationCapacityMegaWatts / us-gaap_JointlyOwnedUtilityPlantAxis = us-gaap_JointlyOwnedElectricityTransmissionAndDistributionSystemMember
Gross Plant In Service | 42 us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService / us-gaap_JointlyOwnedUtilityPlantAxis = us-gaap_JointlyOwnedElectricityTransmissionAndDistributionSystemMember
Accumulated Depreciation | 6 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation / us-gaap_JointlyOwnedUtilityPlantAxis = us-gaap_JointlyOwnedElectricityTransmissionAndDistributionSystemMember
Total Jointly Owned Plant |
Jointly Owned Utility Plant Interests [Line Items] |
Construction Work In Process | 25 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress / us-gaap_JointlyOwnedUtilityPlantAxis = aes_TotalJointlyOwnedPlantMember
Gross Plant In Service | 989 us-gaap_JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService / us-gaap_JointlyOwnedUtilityPlantAxis = aes_TotalJointlyOwnedPlantMember
Accumulated Depreciation | 101 us-gaap_JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation / us-gaap_JointlyOwnedUtilityPlantAxis = aes_TotalJointlyOwnedPlantMember

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- Definition Number of Coal-Fired Generation Facilities, Jointly Owned + References No definition available. + Details
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- Definition The period end amount owned by the reporting utility of a jointly owned utility plant in service. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section C + Details
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- Definition The period end amount of construction work in progress at a jointly owned electricity generation plant. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section C + Details
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- Definition The period end amount of accumulated depreciation in a jointly owned electricity generation plant. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section C + Details
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- Definition The proportionate share of interest (percent) in a jointly owned utility plant. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section C + Details
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