Generation Capacity Mega Watts

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- Definition

Goodwill Impairment Test, Number of Wind Projects

+ References

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

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-Paragraph 28

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-Topic 350

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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- Definition

Fair value portion of asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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-Publisher FASB

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended			3 Months Ended
	Sep. 29, 2014	Dec. 31, 2014 MW	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Mar. 31, 2014 MW project	Dec. 31, 2013	Sep. 30, 2013 MW
Goodwill [Line Items]
Goodwill impairment expense		$ 164,000,000us-gaap_GoodwillImpairmentLoss	$ 372,000,000us-gaap_GoodwillImpairmentLoss	$ 1,817,000,000us-gaap_GoodwillImpairmentLoss
Production Capacity (MW)		2,072aes_GenerationCapacityMegaWatts			2,072aes_GenerationCapacityMegaWatts
Goodwill		3,896,000,000us-gaap_GoodwillGross	3,954,000,000us-gaap_GoodwillGross	3,959,000,000us-gaap_GoodwillGross	3,896,000,000us-gaap_GoodwillGross		3,954,000,000us-gaap_GoodwillGross
Effective tax rate	21.00%	27.00%	33.00%	298.00%
Amortization of intangible assets		26,000,000us-gaap_AmortizationOfIntangibleAssets	29,000,000us-gaap_AmortizationOfIntangibleAssets	115,000,000us-gaap_AmortizationOfIntangibleAssets
Buffalo Gap
Goodwill [Line Items]
Goodwill impairment expense					10,000,000	18,000,000
Number of wind projects						3
Production Capacity (MW)						524
DPLER
Goodwill [Line Items]
Goodwill impairment expense						136,000,000
Goodwill						136,000,000
Goodwill, fair value						0
DP&L
Goodwill [Line Items]
Goodwill impairment expense				1,820,000,000			307,000,000
Goodwill, fair value			316,000,000				316,000,000
Effective tax rate			33.00%	298.00%
Mountain View
Goodwill [Line Items]
Goodwill impairment expense							7,000,000
Number of wind projects			2				2
Production Capacity (MW)			67				67
Ebute
Goodwill [Line Items]
Goodwill, Written off Related to Sale of Business Unit					58,000,000
Goodwill impairment expense								$ 58,000,000
Production Capacity (MW)								294