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Held-for-Sale and Dispositions Dispositions (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2022
Jun. 30, 2021
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Proceeds from Divestiture of Businesses and Interests in Affiliates       $ 1 $ 58
Gain (loss) on disposal and sale of businesses interests $ 2 $ (64)   1 $ (59)
Itabo Opco [Member]          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Disposal Group Not Discontinued Operation Ownership Interest Sold   43.00%     43.00%
Jordan (IPP1 & IPP4)          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Equity Method Investment, Ownership Percentage     10.00%    
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Itabo Opco [Member]          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Proceeds from Divestiture of Businesses and Interests in Affiliates         $ 88
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | AES Tiete Inova Solucoes          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Proceeds from Divestiture of Businesses and Interests in Affiliates         20
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax 22 $ 20   52 40
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Mong Duong Subsidiary [Member]          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax 16 15   41 30
Assets Carrying Amount Disclosure Nonrecurring     $ 552    
Disposal Group Not Discontinued Operation Ownership Interest Sold     51.00%    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Jordan (IPP1 & IPP4)          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax 6 5   11 10
Assets Carrying Amount Disclosure Nonrecurring $ 203     $ 203  
Proceeds from Divestiture of Businesses and Interests in Affiliates     $ 58    
Disposal Group Not Discontinued Operation Ownership Interest Sold     26.00%    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Mong Duong Financing SPV          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Disposal Group Not Discontinued Operation Ownership Interest Sold     51.00%    
AES Tiete Inova Solucoes | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal         (1)
Itabo Opco [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal         4
Itabo Opco [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]          
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]          
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax   $ 1     $ 5