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Debt - Non-Recourse Debt Narrative (Details) $ in Millions	3 Months Ended
Debt - Non-Recourse Debt Narrative (Details) $ in Millions	Mar. 31, 2026 USD ($) Rate	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2021 agreement
Debt Instrument [Line Items]
Proceeds From Issuance Of Nonrecourse Debt	$ 459	$ 1,293
Loss on extinguishment of debt	(8)	(8)
Restricted Net Assets	1,900
Restricted Cash And Debt Service Reserves	719		$ 531
Restricted Cash Held for Insurance	152		153
Materiality Threshold for Sub Default to Trigger Cross Default	$ 200
Number of Credit Agreements \| agreement				2
Ownership percentage in project	70.00%
Restricted Cash [Member]
Debt Instrument [Line Items]
Restricted Cash And Debt Service Reserves	$ 422		451
Debt Service Reserves [Member]
Debt Instrument [Line Items]
Restricted Cash And Debt Service Reserves	111	$ 80
Nonrecourse [Member]
Debt Instrument [Line Items]
Restricted Cash And Debt Service Reserves	533
Long-Term Debt	22,547		21,681
Consolidated Variable Interest Entities [Member]
Debt Instrument [Line Items]
Restricted Cash And Debt Service Reserves	393
Variable Rate [Domain] \| Notes Payable to Banks
Debt Instrument [Line Items]
Non-recourse debt	1,300
Notes Payable to Banks \| Variable Rate [Domain]
Debt Instrument [Line Items]
Non-recourse debt	11,500
AES Clean Energy Subsidiary \| Revolving Credit Facilities, Joint and Several
Debt Instrument [Line Items]
Credit Facility, Commitments Used	2,300
AES Clean Energy and sPower (co-issuers) \| Master Indenture Notes \| Nonrecourse [Member]
Debt Instrument [Line Items]
Long-Term Debt	3,300
AES Clean Energy Development \| Revolving Credit Facilities, Joint and Several
Debt Instrument [Line Items]
Line of Credit Facility, Increase (Decrease), Net	646
Credit Facility, Commitments Used	$ 2,500
AES Clean Energy Development \| Bellefield Financing Agreement due 2026 \| Nonrecourse [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.07%
Credit Facility, Commitments Used	$ 901
Credit facility, commitments	$ 1,700
AES Clean Energy Development \| Bellefield Financing Agreement due 2027 \| Nonrecourse [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.21%
Credit Facility, Commitments Used	$ 381
AES Clean Energy and sPower (co-borrowers) \| Revolving Credit Facilities, Joint and Several
Debt Instrument [Line Items]
Issued senior notes	4,000
AES Clean Energy and sPower (co-borrowers) \| Master Indenture Notes \| Nonrecourse [Member]
Debt Instrument [Line Items]
Long-Term Debt	2,500
AES Puerto Rico \| Nonrecourse Debt [Member] \| PR Series A Bond due 2026
Debt Instrument [Line Items]
Issued senior notes	$ 156
Debt Instrument, Interest Rate, Stated Percentage	6.625%
Preferred Shares Conversion Option	0.999
AES Puerto Rico \| Nonrecourse Debt [Member] \| PR Senior Secured Bonds due 2028
Debt Instrument [Line Items]
Issued senior notes	$ 112
Debt Instrument, Interest Rate, Stated Percentage	6.625%
AES Puerto Rico \| Nonrecourse Debt [Member] \| Preferred Shares in AES Guayama Holdings
Debt Instrument [Line Items]
Issued senior notes	$ 44
Debt Instrument, Interest Rate, Stated Percentage	3.125%
AES Andes \| Andes Senior Notes due 2032 \| Nonrecourse [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.25%
Proceeds from Issuance of Debt	$ 400
AES Andes \| Andes Senior Notes due 2079 \| Nonrecourse [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 3
Debt Instrument, Interest Rate, Stated Percentage \| Rate	6.35%
Proceeds from Issuance of Debt	$ 228
AES Puerto Rico Solar
Debt Instrument [Line Items]
Loan Guarantee from government	861
Outstanding Borrowings	880
AES Puerto Rico Solar \| Puerto Rico Solar Tax Credit Transfer Bridge Loan Agreement \| Nonrecourse [Member]
Debt Instrument [Line Items]
Issued senior notes	230
Line of Credit Facility, Remaining Borrowing Capacity	$ 209
AES Puerto Rico Solar \| Puerto Rico Solar Tax Credit Transfer Bridge Loan Agreement \| Nonrecourse [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	1.25%
AES Puerto Rico Solar \| Puerto Rico Solar Tax Credit Transfer Bridge Loan Agreement \| Nonrecourse [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	2.25%
AES Pacifico
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	$ 1,100
AES Pacifico \| Nonrecourse [Member]
Debt Instrument [Line Items]
Issued senior notes			$ 1,700