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Redeemable Stock of Subsidiaries (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Jun. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2024 | Dec. 31, 2021
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Redeemable Preferred Stock Dividends |  |  |  | $ (61) | $ (62) | $ (64) |  |
Temporary equity carrying amount |  |  |  | 938 | 1,464 | 1,321 |  | $ 1,257
Temporary Equity, Stock Issued During Period, Value, New Issues |  |  |  | 197 | 100 | 168 |  |
Temporary Equity, Net Income |  |  |  | (86) | (59) | (87) |  |
Temporary Equity, Interest in Subsidiary Earnings |  |  |  | 105 | 163 | 67 |  |
Sale of Stock, Consideration Received on Transaction | $ 63 |  |  |  |  |  |  |
Redeemable stock of subsidiaries |  |  | $ 901 | 938 | 1,464 |  | $ 905 |
Redeemable Noncontrolling Interest, Equity, Other, Carrying Amount |  |  |  | (736) | 0 | 0 |  |
Temporary Equity, Elimination as Part of Reorganization |  |  |  | (18) | 0 | 0 |  |
Potengi |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  | 35.50% |  |  |  |  |  |
Noncontrolling Interest [Member] |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Temporary Equity, Other Changes |  |  |  | 0 | 0 | (60) |  |
IPALCO Enterprises, Inc. [Member] |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount |  |  |  | 835 | 773 |  |  |
IPL Subsidiary |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount |  |  |  |  |  | 60 |  |
AES Clean Energy |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount |  |  |  | 0 | 544 |  |  |
CDPQ |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Temporary Equity, Interest in Subsidiary Earnings |  |  |  | 68 |  | 77 |  |
AES Clean Energy Development |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount |  |  |  | 65 | 129 |  |  |
Temporary Equity, Stock Issued During Period, Value, New Issues |  |  |  | 159 | 100 | 157 |  |
Noncontrolling Interest, Increase from Subsidiary Equity Issuance |  |  |  | 159 |  |  |  |
Potengi |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount |  |  |  | 0 | 18 |  |  |
Sale of Stock, Description of Transaction |  | 24 |  |  |  |  |  |
Sale of Stock, Consideration Received on Transaction |  | $ 12 |  |  |  |  |  |
AES Indiana |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount |  |  |  | 38 | 0 |  |  |
AES Clean Energy Development |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Reclassifications of Temporary to Permanent Equity |  |  | $ 577 |  |  |  |  |
Other Comprehensive Income (Loss) [Member] |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |
Temporary Equity, Other Changes |  |  |  | $ 73 | $ 1 | $ 40 |  |

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