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Acquisitions - Subsequent Events and Transfer of Balance of Equity Narrative (Details) - Subsequent Event - USD ($)
$ in Millions
1 Months Ended
Oct. 31, 2016
Jan. 27, 2017
Nov. 30, 2016
Azure      
Business Acquisition [Line Items]      
Additional ownership interest acquired     26.00%
Millenium Solar Power      
Business Acquisition [Line Items]      
Additional ownership interest acquired   26.00%  
Millenium Solar Power      
Business Acquisition [Line Items]      
Additional ownership interest acquired 11.00%    
Payments to acquire additional interest in subsidiaries $ 1.0    
Focal Solar Power Plant      
Business Acquisition [Line Items]      
Percentage of voting interests acquired 51.00%    
Payments to acquire businesses $ 0.5