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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Contingencies (Loss Contingencies) (Details) R$ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024 BRL (R$) agreement	Dec. 31, 2024 USD ($) agreement	Dec. 31, 2023 USD ($)
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 3,567
Obligations number of agreements \| agreement	137	137
Subsidiary Guarantee, Maximum Undiscounted Exposure		$ 5,300
Subsidiary Guarantee, Customary Payment Agreements		2,200
Subsidiary Guarantee, Tax Equity Financing Guarantees		388
Letters of credit outstanding		1,400
Litigation Contingencies
Surety Bonds and Other Guarentees		1,200
Environmental Remediation Contingency [Domain]
Environmental Contingencies
Liability recorded for projected environmental remediation costs		2	$ 9
Guarantee Obligations [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 3,040
Obligations number of agreements \| agreement	89	89
Litigation
Litigation Contingencies
Aggregate reserves for claims deemed both probable and reasonably estimable		$ 5	$ 17
Parent Company [Member] \| Guarantees [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 3,000
Obligations number of agreements \| agreement	89	89
Unsecured Debt [Member] \| Financial Standby Letter of Credit [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 129
Obligations number of agreements \| agreement	28	28
Secured Debt [Member] \| Financial Standby Letter of Credit [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 18
Obligations number of agreements \| agreement	9	9
Secured Debt [Member] \| Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 378
Obligations number of agreements \| agreement	9	9
Secured Debt [Member] \| Surety Bond
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 2
Obligations number of agreements \| agreement	2	2
Minimum [Member] \| Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	1.00%
Minimum [Member] \| Guarantee Obligations [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		$ 1
Minimum [Member] \| Litigation
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		39
Minimum [Member] \| AES sul \| Litigation
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	R$ 15	2
Minimum [Member] \| Unsecured Debt [Member] \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		1
Minimum [Member] \| Secured Debt [Member] \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		1
Minimum [Member] \| Secured Debt [Member] \| Surety Bond
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		1
Minimum [Member] \| Line of Credit \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		11
Maximum [Member] \| Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	3.00%
Maximum [Member] \| Guarantee Obligations [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		350
Maximum [Member] \| Litigation
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		66
Maximum [Member] \| AES sul \| Litigation
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	R$ 60	10
Maximum [Member] \| Unsecured Debt [Member] \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		50
Maximum [Member] \| Secured Debt [Member] \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		4
Maximum [Member] \| Secured Debt [Member] \| Surety Bond
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		1
Maximum [Member] \| Line of Credit \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		$ 88