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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2024 | Jun. 30, 2024
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Gross Balance |  | $ 2,346,000,000 | $ 2,691,000,000 |  |  |
Accumulated Amortization |  | (426,000,000) | (498,000,000) |  | $ 426 | $ 420
Net Balance |  | 1,920,000,000 | 2,193,000,000 |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 27,000,000 | 50,000,000 |  |  |
Indefinite- lived intangible assets, Amortization |  | 0 | 0 |  |  |
Other Intangible Assets, Net |  | 1,947,000,000 |  |  |  |
Intangible Assets, Gross |  | 2,373,000,000 | 2,741,000,000 |  |  |
Intangible Assets, Net | $ 1,841,000,000 | 1,947,000,000 | 2,243,000,000 | $ 1,841,000,000 | $ 1,928,000,000 | $ 1,879,000,000
Goodwill impairment expense |  | 0 | 12,000,000 | 777,000,000 |  |
Goodwill impairment expense |  | 0 | 12,000,000 | $ 777,000,000 |  |
Operating Segments [Member] | AES Andes |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Goodwill impairment expense | 644,000,000 |  |  |  |  |
Goodwill impairment expense | $ 644,000,000 |  |  |  |  |
Land Use Rights [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 8,000,000 | 22,000,000 |  |  |
Indefinite- lived intangible assets, Amortization |  | 0 | 0 |  |  |
Transmission Rights [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 17,000,000 | 20,000,000 |  |  |
Indefinite- lived intangible assets, Amortization |  | 0 | 0 |  |  |
Other |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | 2,000,000 | 8,000,000 |  |  |
Indefinite- lived intangible assets, Amortization |  | 0 | 0 |  |  |
Computer Software, Intangible Asset [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Gross Balance |  | 794,000,000 | 696,000,000 |  |  |
Accumulated Amortization |  | 333,000,000 | 324,000,000 |  |  |
Net Balance |  | 461,000,000 | 372,000,000 |  |  |
Emission allowances [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Gross Balance |  | 1,000,000 | 50,000,000 |  |  |
Accumulated Amortization |  | 0 | 0 |  |  |
Net Balance |  | 1,000,000 | 50,000,000 |  |  |
Project Development Rights [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Gross Balance |  | 1,328,000,000 | 1,222,000,000 |  |  |
Accumulated Amortization |  | 37,000,000 | 43,000,000 |  |  |
Net Balance |  | 1,291,000,000 | 1,179,000,000 |  |  |
Contracts |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Gross Balance |  | 68,000,000 | 337,000,000 |  |  |
Accumulated Amortization |  | 29,000,000 | 37,000,000 |  |  |
Net Balance |  | 39,000,000 | 300,000,000 |  |  |
Other |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Gross Balance |  | 28,000,000 | 45,000,000 |  |  |
Accumulated Amortization |  | 5,000,000 | 20,000,000 |  |  |
Net Balance |  | 23,000,000 | 25,000,000 |  |  |
Compensation from Concession Agreement |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Gross Balance |  | 19,000,000 | 222,000,000 |  |  |
Accumulated Amortization |  | 19,000,000 | 71,000,000 |  |  |
Net Balance |  | 0 | 151,000,000 |  |  |
Land Use Rights [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |  |  |  |  |
Gross Balance |  | 108,000,000 | 119,000,000 |  |  |
Accumulated Amortization |  | 3,000,000 | 3,000,000 |  |  |
Net Balance |  | $ 105,000,000 | $ 116,000,000 |  |  |

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