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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Income Tax Disclosures [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent | 28.00% | 31.00% | (60.00%) | 34.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 21.00% |
Proceeds from Divestiture of Businesses and Interests in Affiliates |  |  | $ 41 | $ 226
Income Tax Expense (Benefit) | $ (147) | $ 130 | 55 | $ 302
AES Argentina [Member] |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation | 11 |  | 17 |
Gener Subsidiary [Member] |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Income Tax Expense (Benefit) | 0 |  | 21 |
DPL Subsidiary [Member] |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Income Tax Expense (Benefit) |  |  | 25 |
Guacolda [Member] |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Income Tax Expense (Benefit) | 28 |  | $ 20 |
AES Mexico [Member] |  |  |  |
Income Tax Disclosures [Line Items] |  |  |  |
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation | $ 11 |  |  |

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