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Financing Receivables (Details) - USD ($) $ in Millions	9 Months Ended
Financing Receivables (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment [Line Items]
Financing receivable	$ 82	$ 101
Financing Receivable, before Allowance for Credit Loss	84	110
Financing Receivable, Allowance for Credit Loss	2	9
Argentina [Member]
Financing Receivable Recorded Investment [Line Items]
Financing receivable	10	39
Financing Receivable, before Allowance for Credit Loss	12	48
Financing Receivable, Allowance for Credit Loss	2	9
Chile [Member]
Financing Receivable Recorded Investment [Line Items]
Financing receivable	46	31
Financing Receivable, before Allowance for Credit Loss	46	31
Financing Receivable, Allowance for Credit Loss	0	0
Other Entity [Member]
Financing Receivable Recorded Investment [Line Items]
Financing receivable	26	31
Financing Receivable, before Allowance for Credit Loss	26	31
Financing Receivable, Allowance for Credit Loss	0	$ 0
AES Gener
Financing Receivable Recorded Investment [Line Items]
Proceeds from Sale and Collection of Receivables	$ 65

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Amount, before allowance for credit loss, of financing receivable.