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Acquisitions and Dispositions (Details) $ in Millions |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 27, 2016 USD ($) | Jan. 01, 2016 USD ($) | Jul. 01, 2015 USD ($) | Mar. 31, 2015 USD ($) | Nov. 20, 2014 USD ($) | Aug. 22, 2014 USD ($) project | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) | Sep. 16, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Aug. 21, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  |  |  |  |  |  |  | $ 29 |  | $ 29 | $ 358 |
Proceeds from Divestiture of Businesses and Interests in Affiliates |  |  |  |  |  |  |  | 631 |  | 138 | 1,807 |
Income (Loss) from Continuing Operations Attributable to Parent |  |  |  |  |  |  |  | 8 |  | 331 | 705 |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Ownership Interests |  |  |  |  |  |  |  | $ 0 |  | 154 | 83 |
Ebute [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax loss of disposed businesses, Excluding gain on disposal, included in continuing operations |  |  |  |  |  |  |  |  |  |  | (27) |
UK Wind Projects |  |  |  |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Number of U.K. Wind Projects Sold | project |  |  |  |  |  | 4 |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | AES Nigeria Barge limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest sold |  |  |  |  | 95.00% |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Armenia Mountain [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  | $ 64 |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest sold |  |  |  | 100.00% |  |  |  |  |  |  |  |
Pre-tax gain on disposal |  |  | $ 22 |  |  |  |  |  |  |  |  |
Sale Agreement, Buyer Option To Purchase Ownership Interest, Sales Price |  |  |  | $ 75 |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Ebute [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Ownership Interests |  |  |  |  | $ 22 |  |  |  |  |  |  |
Pre-tax gain on disposal |  |  |  |  | $ (6) |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | AES NBO [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest sold |  |  |  |  | 100.00% |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | UK Wind Projects |  |  |  |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Ownership Interests |  |  |  |  |  | $ 158 |  |  |  |  |  |
Pre-tax gain on disposal |  |  |  |  |  | $ 78 |  |  |  |  |  |
Pre-tax loss of disposed businesses, Excluding gain on disposal, included in continuing operations |  |  |  |  |  |  |  |  |  |  | (18) |
Number of U.K. Wind Projects Sold | project |  |  |  |  |  | 4 |  |  |  |  |  |
Distributed energy [Domain] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  | $ 43 |  |  |
Armenia Mountain [Member] |  |  |  |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax income of disposed businesses, Excluding gain on disposal, included in continuing operations |  |  |  |  |  |  |  |  |  | 6 | 7 |
UK Wind Projects |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  |  |  |  |  |  | $ (20) |  |  |  |  |
DPLER [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  | $ 49 |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses and Interests in Affiliates |  |  |  |  |  |  |  |  |  | 76 |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax income of disposed businesses, Excluding gain on disposal, included in continuing operations |  |  |  |  |  |  |  |  |  | 11 | (129) |
Kelanitissa [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business | $ (5) |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses and Interests in Affiliates | $ 18 |  |  |  |  |  |  |  |  |  |  |
Dispositions and Held-for-Sales Businesses |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax income of disposed businesses, Excluding gain on disposal, included in continuing operations |  |  |  |  |  |  |  |  |  | $ (7) | $ 1 |
Investment In Affiliate Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 90.00%

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