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Financing Receivables (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Financing Receivable Recorded Investment [Line Items]    
Financing receivable $ 111 $ 101
Financing Receivable, before Allowance for Credit Loss 119 110
Financing Receivable, Allowance for Credit Loss 8 9
Argentina [Member]    
Financing Receivable Recorded Investment [Line Items]    
Financing receivable 37 39
Financing Receivable, before Allowance for Credit Loss 45 48
Financing Receivable, Allowance for Credit Loss 8 9
Chile [Member]    
Financing Receivable Recorded Investment [Line Items]    
Financing receivable 44 31
Financing Receivable, before Allowance for Credit Loss 44 31
Financing Receivable, Allowance for Credit Loss 0 0
Other Entity [Member]    
Financing Receivable Recorded Investment [Line Items]    
Financing receivable 30 31
Financing Receivable, before Allowance for Credit Loss 30 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