Related Parties - SunPower ROFO Agreement (Details) - MW				12 Months Ended
	Aug. 11, 2017	May 15, 2017	Feb. 13, 2017	Nov. 30, 2017
Related Party Transaction [Line Items]
Power purchase agreement serving (in years)				5 years
Aggregate solar nameplate megawatts				946
Sun Power ROFO Waiver | OpCo
Related Party Transaction [Line Items]
Power purchase agreement serving (in years)			5 years
First Solar ROFO Agreement | OpCo
Related Party Transaction [Line Items]
Power purchase agreement serving (in years)				5 years
Negotiation period (in days)	45 days	45 days	45 days
El Pelicano Solar Generation Project | Sun Power ROFO Waiver
Related Party Transaction [Line Items]
Aggregate solar nameplate megawatts			100
Boulder Solar Generation Project | Sun Power ROFO Waiver
Related Party Transaction [Line Items]
Aggregate solar nameplate megawatts			100