Solar Energy Systems, Net - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Leases [Abstract]
Depreciation expense	$ 93.4	$ 70.7	$ 54.7
Amortization of deferred grants	$ 13.1	$ 14.2	$ 13.9