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Reversal of Cost of Goods Sold associated with previously recognized compensation to be received from the concession extension that was updated based on new regulations (ANEEL) published in December 2020

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

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Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Describe the approximate term of the guarantee or each group of similar guarantees.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of loss contingency liability.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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Amount after accumulated amortization of finite-lived and indefinite-lived intangible assets classified as other.

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Contingencies (Loss Contingencies) (Details) $ in Millions	3 Months Ended	12 Months Ended
Contingencies (Loss Contingencies) (Details) $ in Millions	Dec. 31, 2020 USD ($) agreement	Dec. 31, 2020 USD ($) agreement	Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Guarantor Obligations, Term		less than one year to no more than 15 years
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,546	$ 1,546
Number of Agreements \| agreement	112	112
Environmental Remediation Contingency [Domain]
Environmental Contingencies
Liability recorded for projected environmental remediation costs	$ 5	$ 5	$ 4
Guarantee Obligations [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,358	$ 1,358
Number of Agreements \| agreement	69	69
Litigation
Litigation Contingencies
Aggregate reserves for claims deemed both probable and reasonably estimable	$ 28	$ 28	55
Parent Company [Member]
Litigation Contingencies
Other Intangible Assets, Net	0	0	$ 1
Parent Company [Member] \| Guarantees [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,400	$ 1,400
Number of Agreements \| agreement	69	69
AES Tiete [Domain] \| Compensation from Concession Agreement
Litigation Contingencies
Deferred Compensation Arrangement with Individual, Requisite Service Period	2 years 7 months 6 days
AES Tiete
Litigation Contingencies
Reversal of Cost of Goods Sold	$ 184	$ 184
AES Tiete \| Compensation from Concession Agreement
Litigation Contingencies
Other Intangible Assets, Net	184	184
Unsecured Debt [Member] \| Financial Standby Letter of Credit [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 110	$ 110
Number of Agreements \| agreement	25	25
Secured Debt [Member] \| Financial Standby Letter of Credit [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 77	$ 77
Number of Agreements \| agreement	17	17
Secured Debt [Member] \| Surety Bond
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1	$ 1
Number of Agreements \| agreement	1	1
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	$ 0	$ 0
Minimum [Member] \| Litigation
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	245	245
Minimum [Member] \| Unsecured Debt [Member] \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	0	0
Minimum [Member] \| Secured Debt [Member] \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	0	0
Minimum [Member] \| Secured Debt [Member] \| Surety Bond
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	1	$ 1
Maximum [Member] \| Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		3.00%
Maximum [Member] \| Environmental Remediation Contingency [Domain]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	12	$ 12
Maximum [Member] \| Guarantee Obligations [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	157	157
Maximum [Member] \| Litigation
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	933	933
Maximum [Member] \| Unsecured Debt [Member] \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	56	56
Maximum [Member] \| Secured Debt [Member] \| Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	62	62
Maximum [Member] \| Secured Debt [Member] \| Surety Bond
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	$ 1	$ 1