Organization - Narrative (Details)	9 Months Ended
	Sep. 30, 2021 investment_fund
Operating Leased Assets [Line Items]
Power purchase or lease agreement term	22 years
Number of legal structures utilized in investment funds	3
Minimum
Operating Leased Assets [Line Items]
Power purchase or lease agreement term	20 years
Maximum
Operating Leased Assets [Line Items]
Power purchase or lease agreement term	25 years