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Investments Accounted for by the Equity Method and Variable Interest Entities - PG&E Bankruptcy (Details) - USD ($)
$ in Millions
1 Months Ended
Nov. 30, 2020
Dec. 31, 2020
Investments Accounted for by the Equity Method    
Distribution received $ 50  
Agua Caliente    
Investments Accounted for by the Equity Method    
Ownership percentage 35.00% 35.00%
Ivanpah Master Holdings, LLC    
Investments Accounted for by the Equity Method    
Ownership percentage   54.50%