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Investments In and Advances To Affiliates (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended |  |  |  |  |
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Sep. 30, 2025 | Jun. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Feb. 05, 2024 | Sep. 30, 2022 | Dec. 31, 2021 | Mar. 04, 2021
Minority Owned Affiliates [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  | $ 2,046 | $ 2,067 |  |  |  |  |
Operating income (loss) |  |  |  |  |  | 68 | 48 |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest |  |  |  |  |  | (148) | (143) |  |  |  |  |
Net Income (Loss) attributable to affiliates |  |  |  |  |  | (155) | (64) |  |  |  |  |
Noncash or Part Noncash Divestiture, Amount of Consideration Received |  |  |  |  |  | 19 | 14 |  |  |  |  |
Revenue | $ 3,351 |  | $ 3,289 |  |  | 9,132 | 9,316 |  |  |  |  |
Operating income (loss) | 735 |  | 722 |  |  | 1,629 | 1,894 |  |  |  |  |
Gain (Loss) on Disposition of Business | 1 |  | (1) |  |  | 70 | 43 |  |  |  |  |
Income (Loss) from Equity Method Investments | 1 |  | $ (9) |  |  | (55) | (21) |  |  |  |  |
Contributions and loans to equity affiliates |  |  |  |  |  | 2 | $ 71 |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) |  |  |  |  |  |  |  |  | $ 25.73 |  |  | $ 25.88
Commercial Paper | Corporate and Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Summary of Derivative Instruments Impact on Results of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Commercial Paper, Average Outstanding |  |  |  |  |  | $ 573 |  |  |  |  |  |
UNITED KINGDOM | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group Not Discontinued Operation Ownership Interest Sold |  |  |  |  |  |  |  |  |  |  | 100.00% |
Jordan (IPP1 & IPP4) | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group Not Discontinued Operation Ownership Interest Sold |  |  | 26.00% |  | 26.00% |  | 26.00% |  |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction |  |  |  |  |  | 10.00% |  |  |  |  |  |
Jordan (IPP1 & IPP4) | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  |  |  |  | $ 10 |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  |  | 45 |  |  |  |  |  |  |
Divestiture of Business, sales price |  |  |  |  | $ 58 |  |  |  |  |  |  |
Alto Maipo [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group Not Discontinued Operation Ownership Interest Sold |  |  |  |  |  |  |  |  |  | 99.00% |  |
Uplight |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  | 29.00% |  |  |  |
Equity Method Investment, Realized Gain (Loss) on Disposal (less than) |  | $ 52 |  |  |  |  |  |  |  |  |  |
Equity Method Investments | 0 |  |  |  |  | $ 0 |  |  |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction |  |  |  | 25.00% |  |  |  |  |  |  |  |
Summary of Derivative Instruments Impact on Results of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Investment Income, Investment Expense | 32 |  |  |  |  |  |  |  |  |  |  |
Uplight | Schneider [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Purchase Price Agreement |  | $ 40 |  |  |  |  |  |  |  |  |  |
Shares, Issued |  | 91 |  | 91 |  |  |  |  |  |  |  |
Jordan (IPP1 & IPP4) |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 10.00% |  |  |  | 10.00% |  |  |  |  |
Majority Owned Affiliate [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  | 0 | $ 1 |  |  |  |  |
Operating income (loss) |  |  |  |  |  | 0 | (1) |  |  |  |  |
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest |  |  |  |  |  | (2) | (1) |  |  |  |  |
Net Income (Loss) attributable to affiliates |  |  |  |  |  | (2) | $ (1) |  |  |  |  |
Barry Affiliate |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Other Long-Term Debt | $ 44 |  |  |  |  | $ 44 |  | $ 41 |  |  |  |
AES Hispanola Holdings II BV |  |  |  |  |  |  |  |  |  |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Discontinued Operation, Equity Method Investment Retained after Disposal, Ownership Interest before Disposal | 65.00% |  |  |  |  |  |  |  |  |  |  |

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