Reversal of Cost of Goods

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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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Amount of loss contingency liability.

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- Definition

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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No definition available.

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Contingencies and Commitments - Loss Contingencies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Environmental Contingencies
Liability recorded for projected environmental remediation costs		$ 5	$ 3
AES Tiete [Domain]
Litigation Contingencies
Reversal of Cost of Goods	$ 6	184
AES Tiete [Domain] \| Compensation from Concession Agreement
Litigation Contingencies
Other Intangible Assets, Net	$ 190	$ 184
AES Tiete [Domain] \| Compensation from Concession Agreement
Litigation Contingencies
Deferred Compensation Arrangement with Individual, Requisite Service Period		2 years 8 months 12 days
Litigation [Member]
Litigation Contingencies
Aggregate reserves for claims deemed both probable and reasonably estimable		$ 28	46
Maximum [Member] \| Litigation [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss			893
Maximum [Member] \| Environmental Issue
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss			12
Minimum [Member] \| Litigation [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss			$ 256