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Fair Value (Nonrecurring Measurements) (Details) (USD $) | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  |  |  |  |
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 East Bend DPL [Member] | Jun. 30, 2014 Ebute [Member] | Jun. 30, 2014 UK Wind (Newfield) [Member] | Jun. 30, 2014 DPLER [Member] | Mar. 31, 2014 DPLER [Member] | Mar. 31, 2014 Buffalo Gap [Member] | Jun. 30, 2014 Long Lived Assets Held And Used [Member] East Bend DPL [Member] | Jun. 30, 2014 Long Lived Assets Held And Used [Member] Ebute [Member] | Jun. 30, 2014 Long Lived Assets Held And Used [Member] UK Wind (Newfield) [Member] | Jun. 30, 2013 Long Lived Assets Held And Used [Member] Beaver Valley [Member] | Jun. 30, 2013 Long Lived Assets Held For Sale [Member] Wind turbines [Member] | Jun. 30, 2014 Discontinued operations and held for sale businesses [Member] Cameroon [Member] | Jun. 30, 2013 Discontinued operations and held for sale businesses [Member] Ukraine utilities [Member] | Jun. 30, 2014 Equity Method Investee [Member] Silver Ridge Power [Member] | Jun. 30, 2014 Goodwill [Member] DPLER [Member] | Jun. 30, 2014 Goodwill [Member] Buffalo Gap [Member] | Jun. 30, 2014 Carrying Amount [Member] Long Lived Assets Held And Used [Member] East Bend DPL [Member] | Jun. 30, 2014 Carrying Amount [Member] Long Lived Assets Held And Used [Member] Ebute [Member] | Jun. 30, 2014 Carrying Amount [Member] Long Lived Assets Held And Used [Member] UK Wind (Newfield) [Member] | Jun. 30, 2013 Carrying Amount [Member] Long Lived Assets Held And Used [Member] Beaver Valley [Member] | Jun. 30, 2013 Carrying Amount [Member] Long Lived Assets Held For Sale [Member] Wind turbines [Member] | Jun. 30, 2013 Carrying Amount [Member] Long Lived Assets Held For Sale [Member] Wind turbines [Member] Level 2 [Member] | Jun. 30, 2014 Carrying Amount [Member] Discontinued operations and held for sale businesses [Member] Cameroon [Member] | Jun. 30, 2013 Carrying Amount [Member] Discontinued operations and held for sale businesses [Member] Ukraine utilities [Member] | Jun. 30, 2014 Carrying Amount [Member] Equity Method Investee [Member] Silver Ridge Power [Member] | Jun. 30, 2014 Carrying Amount [Member] Goodwill [Member] DPLER [Member] | Jun. 30, 2014 Carrying Amount [Member] Goodwill [Member] Buffalo Gap [Member] | Jun. 30, 2014 Fair Value [Member] Ebute and Silver Ridge Power [Member] Level 3 [Member] | Jun. 30, 2014 Fair Value [Member] Long Lived Assets Held And Used [Member] East Bend DPL [Member] Level 2 [Member] | Jun. 30, 2014 Fair Value [Member] Long Lived Assets Held And Used [Member] Ebute [Member] Level 2 [Member] | Jun. 30, 2014 Fair Value [Member] Long Lived Assets Held And Used [Member] Ebute [Member] Level 3 [Member] | Jun. 30, 2013 Fair Value [Member] Long Lived Assets Held And Used [Member] Beaver Valley [Member] Level 1 [Member] | Jun. 30, 2013 Fair Value [Member] Long Lived Assets Held And Used [Member] Beaver Valley [Member] Level 2 [Member] | Jun. 30, 2013 Fair Value [Member] Long Lived Assets Held And Used [Member] Beaver Valley [Member] Level 3 [Member] | Jun. 30, 2013 Fair Value [Member] Long Lived Assets Held For Sale [Member] Wind turbines [Member] Level 3 [Member] | Jun. 30, 2013 Fair Value [Member] Long Lived Assets Held For Sale [Member] Ukraine utilities [Member] Level 3 [Member] | Jun. 30, 2014 Fair Value [Member] Discontinued operations and held for sale businesses [Member] Cameroon [Member] Level 2 [Member] | Jun. 30, 2013 Fair Value [Member] Discontinued operations and held for sale businesses [Member] Ukraine utilities [Member] Level 2 [Member] | Jun. 30, 2014 Fair Value [Member] Equity Method Investee [Member] Silver Ridge Power [Member] Level 3 [Member] | Jun. 30, 2014 Fair Value [Member] Goodwill [Member] Buffalo Gap [Member] Level 3 [Member] | Jun. 30, 2014 Discounted Cash Flow [Member] Long Lived Assets Held And Used [Member] Ebute [Member] | Jun. 30, 2014 Discounted Cash Flow [Member] Minimum [Member] Long Lived Assets Held And Used [Member] Ebute [Member] | Jun. 30, 2014 Discounted Cash Flow [Member] Minimum [Member] Equity Method Investee [Member] Silver Ridge Power [Member] | Jun. 30, 2014 Discounted Cash Flow [Member] Maximum [Member] Long Lived Assets Held And Used [Member] Ebute [Member] | Jun. 30, 2014 Discounted Cash Flow [Member] Maximum [Member] Equity Method Investee [Member] Silver Ridge Power [Member] | Jun. 30, 2014 Discounted Cash Flow [Member] Weighted Average [Member] Long Lived Assets Held And Used [Member] Ebute [Member] | Jun. 30, 2014 Discounted Cash Flow [Member] Weighted Average [Member] Equity Method Investee [Member] Silver Ridge Power [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value, Nonrecurring |  |  |  |  | $ 2,000,000 | $ 47,000,000 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,000,000 | [1] | $ 99,000,000 | [1] | $ 11,000,000 | [1] | $ 61,000,000 | [1] | $ 25,000,000 | [1] | $ 25,000,000 | [1] | $ 372,000,000 | [2] | $ 143,000,000 | $ 317,000,000 | $ 136,000,000 | [3] | $ 28,000,000 | [3] | $ 320,000,000 | $ 2,000,000 | [1] | $ 0 | [1] | $ 47,000,000 | $ 0 | [1] | $ 0 | [1] | $ 15,000,000 | [1] | $ 0 | [1] | $ 0 | [1] | $ 340,000,000 | [2] | $ 113,000,000 | $ 273,000,000 | [4] | $ 10,000,000 | [3] |  |  |  |  |  |  |
Total other non-operating expense | 44,000,000 | 0 | 44,000,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 44,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment expenses |  |  | 273,000,000 | 48,000,000 |  |  |  |  |  |  | 12,000,000 | [1] | 52,000,000 | [1] | 11,000,000 | [1] | 46,000,000 | [1] | 0 | [1] | 38,000,000 | [2] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment expense | $ 0 | $ 0 | $ 154,000,000 | $ 0 |  |  |  | $ 0 | $ 136,000,000 | $ 18,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 34,000,000 |  | $ 136,000,000 | [3] | $ 18,000,000 | [3] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual Revenue Growth Input |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | (57.00%) | 1.00% | 1.00% | 1.00% | (4.00%)
Pretax Operating Margin Input |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% | (115.00%) | 47.00% | 50.00% | 24.00% | 6.00%
Fair Value Inputs, Cost of Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13.00% |  | 16.00% |  | 14.00%
Weighted Average Cost Of Capital Input |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.30% |  |  |  |  |  |
[1] | See Note 15 — Asset Impairment Expense for further information.
[2] | See Note 17 — Discontinued Operations and Held-For-Sale Businesses for further information. Also, the gross loss equals the carrying amount of the disposal group less its fair value less costs to sell.
[3] | See Note 14 — Goodwill Impairments for further information.
[4] | The fair value for Silver Ridge Power was determined using a combination of the bid price (a level 2 input) obtained for the sale of AES’ interest in solar photovoltaic projects in operation and under development in Bulgaria, France, Greece, India and the United States, and a discounted cash flow model for the solar photovoltaic projects that were retained in Italy, Puerto Rico and Spain.

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