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

Generation Capacity Mega Watts

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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

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- Definition

The period end amount of accumulated depreciation in a jointly owned electricity generation plant.

+ References

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- Definition

The proportionate share of interest (percent) in a jointly owned utility plant.

+ References

+ Details

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