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ACQUISITIONS AND DIVESTITURES - ACQUISITION ACTIVITY (Details) - Saavi Energia
$ in Millions
1 Months Ended
Mar. 31, 2021
USD ($)
MW
Mar. 01, 2021
Feb. 28, 2021
Saavi Energia Asset Acquisition | Sempra Infrastructure      
Business Acquisition [Line Items]      
Purchase price $ 65    
Cash acquired 14    
Debt assumed 277    
Related party note payable assumed 94    
Subsequent acquisition, percentage   100.00%  
Equity interest in acquiree, fair value 34    
Assets acquired 458    
Liabilities assumed $ 345    
Power generation facility, nameplate capacity (in MW) | MW 155    
Intangible assets acquired $ 190    
Intangible assets acquired, useful life 14 years    
Second power generation facility, nameplate capacity (in MW) | MW 108    
ESJ      
Business Acquisition [Line Items]      
Ownership percentage 50.00%    
ESJ | Sempra Infrastructure      
Business Acquisition [Line Items]      
Ownership percentage     50.00%