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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, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | $ 244 | $ 245 | $ 256
General and administrative expenses |  |  |  |  |  |  |  |  | (215) | (194) | (196)
Other income |  |  |  |  |  |  |  |  | 120 | 64 | 84
Other expense |  |  |  |  |  |  |  |  | (57) | (79) | (24)
Loss on extinguishment of debt |  |  |  |  |  |  |  |  | (68) | (13) | (182)
Interest expense |  |  |  |  |  |  |  |  | (1,170) | (1,134) | (1,145)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (521) | 354 | 513
Income tax benefit (expense) |  |  |  |  |  |  |  |  | (990) | (32) | (412)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION | $ (1,342) | $ 152 | $ 53 | $ (24) | $ (949) | $ 175 | $ (482) | $ 126 | (1,161) | (1,130) | 306
Parent Company |  |  |  |  |  |  |  |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue from subsidiaries and affiliates |  |  |  |  |  |  |  |  | 28 | 14 | 24
Equity in earnings of subsidiaries and affiliates |  |  |  |  |  |  |  |  | 630 | (615) | 859
Interest income |  |  |  |  |  |  |  |  | 49 | 19 | 24
General and administrative expenses |  |  |  |  |  |  |  |  | (158) | (144) | (154)
Other income |  |  |  |  |  |  |  |  | 5 | 7 | 24
Other expense |  |  |  |  |  |  |  |  | (554) | (65) | (6)
Loss on extinguishment of debt |  |  |  |  |  |  |  |  | (92) | (14) | (105)
Interest expense |  |  |  |  |  |  |  |  | (317) | (344) | (364)
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (409) | (1,142) | 302
Income tax benefit (expense) |  |  |  |  |  |  |  |  | (752) | 12 | 4
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION |  |  |  |  |  |  |  |  | $ (1,161) | $ (1,130) | $ 306

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