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Income Taxes (Effective Income Tax Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Jun. 30, 2024	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate					21.00%	21.00%	21.00%
Effective Income Tax Rate Reconciliation, Disposition of Asset, Percent					(41.00%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent					(5.00%)	0.00%	0.00%
Other—net					(2.00%)	(2.00%)	(5.00%)
State taxes, net of Federal tax benefit					(2.00%)	87.00%	(1.00%)
Taxes on foreign earnings					(10.00%)	14.00%	(42.00%)
Valuation allowance					52.00%	83.00%	(10.00%)
Uncertain tax positions					0.00%	0.00%	7.00%
Investment Tax Credit					31.00%	70.00%	0.00%
Income Tax Expense (Benefit)	$ 103	$ (35)	$ (51)	$ 52	$ 59	$ 261	$ 265
Effective tax rate					7.00%	251.00%	(157.00%)
Deferred Tax Assets, Valuation Allowance					$ 913	$ 672
Valuation allowance offset					304
Valuation allowance offset, federal					$ 74
AES Southland [Domain]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)							$ 27
Sale of Stock, Description of Transaction						14.9	14.9
AES Andes
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate					0.00%	3.00%	127.00%
U.S. Subsidiaries
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate					25.00%	115.00%	0.00%
AES Dominicana Renewable Energy
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)					$ 28
Sale of Stock, Description of Transaction					20
Ventanas
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)					$ 42
Colon
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Sale of Stock, Description of Transaction					35
UNITED STATES
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate					21.00%
Effective tax rate					35.00%
Non-US [Member]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)					$ 28	$ 19	$ 27

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