Noncontrolling Interests - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Nov. 30, 2017
Minority Interest [Line Items]
Redeemable noncontrolling interests attributable to tax equity investors	$ 17,346,000		$ 17,346,000
Noncontrolling interests attributable to tax equity investors	566,803,000		586,050,000
Income (losses) attributed to the investors	$ (3,203,000)	$ (6,181,000)
Noncontrolling interests obtained through acquisition			$ 1,736,000
First Solar
Minority Interest [Line Items]
Noncontrolling interest, ownership percentage	28.00%		36.50%
Noncontrolling interests attributable to tax equity investors	$ 222,018,000		$ 230,039,000
SunPower
Minority Interest [Line Items]
Noncontrolling interest, ownership percentage	28.00%		36.50%
Noncontrolling interests attributable to tax equity investors	$ 290,193,000		$ 300,670,000
Tax Equity Investors
Minority Interest [Line Items]
Redeemable noncontrolling interests attributable to tax equity investors	17,300,000
Noncontrolling interests attributable to tax equity investors	54,592,000		$ 55,341,000
Subsidiaries
Minority Interest [Line Items]
Income (losses) attributed to the investors	1,000,000	(8,800,000)
8point3 OpCo Holdings, LLC
Minority Interest [Line Items]
Noncontrolling interests obtained through acquisition	$ 0	$ 1,100,000