Income Taxes (Effective Income Tax Reconciliation) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate	(21.00%)	(21.00%)	(21.00%)
Other—net	(2.00%)	(5.00%)	(2.00%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount	$ (1.27)
State taxes, net of Federal tax benefit	87.00%	(1.00%)	(6.00%)
Taxes on foreign earnings	14.00%	(42.00%)	(2.00%)
Valuation allowance	83.00%	(10.00%)	7.00%
Uncertain tax positions	0.00%	7.00%	16.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent	0.00%	0.00%	1.00%
Income Tax Expense (Benefit)	$ 261,000,000	$ 265,000,000	$ (133,000,000)
Effective tax rate	251.00%	(157.00%)	13.00%
Investment Tax Credit	$ (0.70)	$ 0	$ 0
Deconsolidation, Gain (Loss), Amount	2,074,000,000
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	41,000,000
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	41,000,000
Brazil subsidiary [Member]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)	93,000,000
AES Southland [Domain]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)	$ 27,000,000
Buffalo Gap [Member]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate	0.00%	0.00%	(3.00%)
Alto Maipo
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Taxes on foreign earnings	0.00%	0.00%	(17.00%)
Deconsolidation, Gain (Loss), Amount	$ 775,000,000
US and Utilities SBU
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)	$ 176,000,000
AES Andes
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate	(3.00%)	(127.00%)	0.00%
U.S. Subsidiaries
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate	(115.00%)	0.00%	0.00%
AES Dominicana Renewable Energy
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)	$ 28,000,000
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)	$ 19,000,000	$ 27,000,000	$ 27,000,000