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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
	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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