Acquisitions - Terminated Acquisitions Narrative (Details)
$ in Millions
1 Months Ended
Dec. 13, 2016
USD ($)
Apr. 01, 2016
USD ($)
Jun. 30, 2015
USD ($)
power_plant
MW
shares
May 19, 2015
MW
LAP | SunEdison        
Business Acquisition [Line Items]        
Acquisition agreement, capacity of projects to be acquired | MW       72.5
GME        
Business Acquisition [Line Items]        
Acquisition agreement, number of power plants to be acquired | power_plant     4  
Capacity of power plant | MW     326.0  
Payments to acquire businesses     $ 337.9  
Interest rate on purchase price     15.00%  
GME | Subsequent event        
Business Acquisition [Line Items]        
Reimbursement of business acquisition certain expenses $ 0.4      
GME | Common stock        
Business Acquisition [Line Items]        
Common stock issued in acquisition (in shares) | shares     701,754  
GME | SunEdison        
Business Acquisition [Line Items]        
Company payments for solar power plants     $ 46.9  
ESPRA SPA | Renova | Subsequent event        
Business Acquisition [Line Items]        
Agreement termination, fee   $ 10.0