Equity (Transactions with Noncontrolling Interests) (Details) - USD ($)	3 Months Ended						9 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 13, 2021
Noncontrolling Interest [Line Items]
Gain (Loss) on Disposition of Business									$ 134,000,000	$ (9,000,000)	$ (1,683,000,000)
Adjustments to Additional Paid in Capital, Other									13,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (1,514,000,000)	$ (1,640,000,000)							(1,514,000,000)	(1,640,000,000)	(2,220,000,000)
Sale of Stock, Consideration Received on Transaction				$ 63,000,000
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent									23,000,000
Contributions from noncontrolling interests									102,000,000	233,000,000	$ 365,000,000
Retained Earnings (Accumulated Deficit)	(1,386,000,000)	$ (1,635,000,000)							(1,386,000,000)	$ (1,635,000,000)
AES Brasil
Noncontrolling Interest [Line Items]
Equity Method Investment, Ownership Percentage		100.00%								100.00%
Chile Renovables SpA
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			51.00%				51.00%
AES Brasil
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		46.70%								46.70%	45.70%
AES Brasil | Private Placement
Noncontrolling Interest [Line Items]
Sale of Stock, Number of Shares Issued in Transaction							54,000,000
AES Brasil [Domain]
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			47.40%				47.40%
AES Andes
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		99.40%								99.40%
Ownership interest acquired in subsidiary		1.30%								1.30%
AES Southland [Domain]
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other										$ 94,000,000
Sale of Stock, Percentage of Ownership after Transaction										50.10%
Sale of Stock, Consideration Received on Transaction										$ 157,000,000
Stockholders' Equity, Period Increase (Decrease)										$ 91,000,000
Sale of Stock, Description of Transaction										14.9
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent										$ 3,000,000
Chile Renovables SpA
Noncontrolling Interest [Line Items]
Sale of Stock, Consideration Received on Transaction					$ 53,000,000
Sale of Stock, Description of Transaction					49
Indirect ownership percentage in subsidiary by parent			34.00%				34.00%
Proceeds from Issuance or Sale of Equity									275,000,000
Guaimbe Solar Complex [Member]
Noncontrolling Interest [Line Items]
Sale of Stock, Percentage of Ownership before Transaction						45.30%
Sale of Stock, Percentage of Ownership after Transaction						36.30%
Sale of Stock, Consideration Received on Transaction						$ 158,000,000
Sale of Stock, Description of Transaction						19.9
AES Andes
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other										$ 96,000,000
Sale of Stock, Percentage of Ownership before Transaction										67.10%		67.00%
Sale of Stock, Percentage of Ownership after Transaction											98.10%	67.10%
Sale of Stock, Consideration Received on Transaction		$ 172,000,000								$ 522,000,000
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent										76,000,000
Stock Issued During Period, Shares, New Issues											1,980,000,000
Common Stock, Shares Subscribed but Unissued												1,350,000,000
Investment Owned, at Cost		22,000,000								22,000,000		$ 205,000,000
Other Noncontrolling Interests											$ 629,000,000
Contributions from noncontrolling interests											94,000,000
Colon [Domain]
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other			$ 8,000,000
Stockholders' Equity, Period Increase (Decrease)			12,000,000
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent			$ 4,000,000
Redeemable noncontrolling interest, percentage acquired by parent													49.90%
AES Brasil
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other							$ 10,000,000				6,000,000
Stockholders' Equity, Period Increase (Decrease)		$ 7,000,000					98,000,000				13,000,000
Payments to Acquire Additional Interest in Subsidiaries								$ 17,000,000
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent											0.016
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent							$ 3,000,000				7,000,000
Stock Issued During Period, Shares, New Issues		93,000,000
AES Brasil | Private Placement
Noncontrolling Interest [Line Items]
Subsidiary or Equity Method Investee, Cumulative Number of Shares Issued for All Transactions		107,000,000					116,000,000
Sale of Stock, Number of Shares Issued in Transaction							53,000,000
Alto Maipo
Noncontrolling Interest [Line Items]
Stockholders' Equity, Period Increase (Decrease)	182,000,000
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent	177,000,000
Retained Earnings (Accumulated Deficit)	$ 5,000,000								5,000,000
AES Clean Energy
Noncontrolling Interest [Line Items]
Sales to noncontrolling interests									1,039,000,000	230,000,000	0
AES Renewable Holdings
Noncontrolling Interest [Line Items]
Sales to noncontrolling interests									124,000,000	88,000,000	127,000,000
Adjustments to Additional Paid in Capital, Other									34,000,000
Proceeds from Issuance or Sale of Equity									143,000,000
Noncontrolling Interest, Change in Redemption Value									45,000,000
Ventus Wind Complex [Member]
Noncontrolling Interest [Line Items]
Sale of Stock, Percentage of Ownership after Transaction				35.80%
Sale of Stock, Description of Transaction				3.5
Los Olmos
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other										12,000,000
Sale of Stock, Consideration Received on Transaction										80,000,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance										(68,000,000)
Andes Solar 2A
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other										9,000,000
Sale of Stock, Consideration Received on Transaction										37,000,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance										(28,000,000)
Campo Lindo
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other									(9,000,000)
Sale of Stock, Consideration Received on Transaction									50,000,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance									(59,000,000)
Bolero Solar Park
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other									1,000,000
Sale of Stock, Consideration Received on Transaction									58,000,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance									(57,000,000)
Andes Solar 2b
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other									11,000,000
Sale of Stock, Consideration Received on Transaction									156,000,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance									(145,000,000)
AES Dominicana Renewable Energy
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other									$ 73,000,000
Sale of Stock, Percentage of Ownership after Transaction									65.00%
Sale of Stock, Consideration Received on Transaction									$ 192,000,000
Stockholders' Equity, Period Increase (Decrease)									$ 74,000,000
Sale of Stock, Description of Transaction									20
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent									$ (1,000,000)
Colon
Noncontrolling Interest [Line Items]
Adjustments to Additional Paid in Capital, Other									$ 31,000,000
Sale of Stock, Percentage of Ownership after Transaction									65.00%
Sale of Stock, Consideration Received on Transaction									$ 146,000,000
Stockholders' Equity, Period Increase (Decrease)									$ 43,000,000
Sale of Stock, Description of Transaction									35
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent									$ (12,000,000)
IPL Subsidiary [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Change in Redemption Value									79,000,000
AES Panama
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance									$ (42,000,000)
AES Panama | Grupo Energia Gas Panama
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%								49.00%
Additional Paid-in Capital [Member]
Noncontrolling Interest [Line Items]
Sales to noncontrolling interests									$ 85,000,000	78,000,000	(7,000,000)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests									$ (24,000,000)	$ 78,000,000	$ 9,000,000