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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 |

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