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Equity (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2021
Changes In Equity Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Shares Issuable |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40,531,845 |  |
Preferred Stock, Convertible, Conversion Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 31.70
Sales to Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,289 | $ 869 |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  | $ 0 |  |  |  |  | $ 0 |  |  |  |  |  | $ 4 | 1 |  |  |
Treasury Stock, Common, Shares |  | 147,715,595 |  |  |  |  |  |  |  |  |  |  | 147,715,595 |  | 148,635,718 |  |
Reclassifications of Temporary to Permanent Equity |  | $ (51) |  |  |  |  | (62) |  |  |  |  |  | $ (107) | $ (732) |  |  |
AOCI Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes In Equity Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  |  |  | $ 5 |  | $ (1) |  |  | $ 0 |  |  |  |  |  |  |  |
Fair Value Adjustment |  | 0 |  | 0 | [1] |  |  |  | 0 |  | $ 0 |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings |  | 0 |  |  |  | 0 | 0 |  |  |  |  |  |  |  |  |  |
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes In Equity Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  |  |  |  |  |  |  |  |  |  |  |  | $ 4 |  |  |  |
Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes In Equity Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  |  |  | 0 | [2] | 0 |  |  | (1) |  |  |  |  |  |  |  |
Fair Value Adjustment |  | (2) |  | 0 | [1],[2] |  |  |  | 0 |  | $ 0 | [1] |  |  |  |  |
Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings | [2] | 0 |  |  |  | 0 | 0 |  |  |  |  |  |  |  |  |  |
Reclassifications of Temporary to Permanent Equity |  | 51 | [2] | $ 18 | [2] | $ 38 | $ 62 | [2] | $ 670 | [2] |  |  |  |  |  |  |
Treasury Stock, Common |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes In Equity Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value Adjustment |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury Stock, Common, Shares |  | 147,700,000 |  | 147,800,000 |  | 147,800,000 | 148,700,000 |  | 148,800,000 |  | 148,900,000 |  | 147,700,000 | 148,700,000 | 148,600,000 | 149,400,000 |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes In Equity Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Amount Issued |  |  |  |  |  |  |  |  |  |  | $ 838 |  |  |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  |  |  | $ 0 |  | $ 0 |  |  | $ 0 |  |  |  |  |  |  |  |
Fair Value Adjustment |  | $ 0 |  | $ 0 | [1] |  |  |  | 6 |  | (6) | [1] |  |  |  |  |
Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings |  | $ (126) |  |  |  | $ 0 | $ (123) |  | $ (7) |  | $ (116) |  |  |  |  |  |
[1] | Adjustment to record the redeemable stock of AES Global Insurance and a tax equity partnership at AES Clean Energy Development at redemption value.
[2] | Excludes redeemable stock of subsidiaries. See Note 11—Redeemable Stock of Subsidiaries. (2) Related to the reclassification of AES Clean Energy Development common stock, certain tax equity partnerships at AES Clean Energy, and the Pike County BESS tax equity partnership from Redeemable stock of subsidiaries to Noncontrolling interests. See Note 11—Redeemable Stock of Subsidiaries.

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