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Schedule I - Condensed Financial Information of Parent Schedule I - Condensed Financial Information of Parent (Statement of Operations) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | $ 298 | $ 268 | $ 318
General and administrative expenses |  |  |  |  |  |  |  |  | (166) | (165) | (196)
Other expense |  |  |  |  |  |  |  |  | (60) | (53) | (80)
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  | (78) | (186) | (169)
Interest expense |  |  |  |  |  |  |  |  | (911) | (1,038) | (1,050)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (644) | (192) | (277)
Income tax benefit (expense) |  |  |  |  |  |  |  |  | 133 | (216) | (352)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION | $ (632) | $ 343 | $ 28 | $ (148) | $ 318 | $ (333) | $ (83) | $ 144 | (409) | 46 | 303
Parent Company |  |  |  |  |  |  |  |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from subsidiaries and affiliates |  |  |  |  |  |  |  |  | 28 | 29 | 30
Equity in earnings of subsidiaries and affiliates |  |  |  |  |  |  |  |  | (47) | 383 | 674
Interest income |  |  |  |  |  |  |  |  | 20 | 31 | 53
General and administrative expenses |  |  |  |  |  |  |  |  | (121) | (125) | (148)
Other income |  |  |  |  |  |  |  |  | 51 | 26 | 1
Other expense |  |  |  |  |  |  |  |  | (65) | (6) | (103)
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  | 0 | (146) | (5)
Interest expense |  |  |  |  |  |  |  |  | (74) | (163) | (197)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (208) | 29 | 305
Income tax benefit (expense) |  |  |  |  |  |  |  |  | (201) | 17 | (2)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION |  |  |  |  |  |  |  |  | $ (409) | $ 46 | $ 303

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