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Investment in Unconsolidated Affiliates - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 01, 2016
Nov. 11, 2016
May 31, 2017
May 31, 2016
May 31, 2017
May 31, 2016
Nov. 30, 2016
Schedule Of Equity Method Investments [Line Items]              
Difference between partnership's investment unconsolidated affiliates and partnership's proportionate share of the equity method of investee's net assets     $ 138.5   $ 138.5   $ 83.2
Difference over the life of the assets and accretion expense     $ 1.0 $ 0.4 $ 2.0 $ 0.8  
OpCo | SG2 Holdings              
Schedule Of Equity Method Investments [Line Items]              
Percentage of ownership interest     49.00%   49.00%    
OpCo | North Star Holdings              
Schedule Of Equity Method Investments [Line Items]              
Percentage of ownership interest     49.00%   49.00%    
OpCo | Lost Hills Blackwell Holdings              
Schedule Of Equity Method Investments [Line Items]              
Percentage of ownership interest     49.00%   49.00%    
OpCo | Henrietta Holdings              
Schedule Of Equity Method Investments [Line Items]              
Percentage of ownership interest     49.00%   49.00%    
OpCo | Stateline Holdings              
Schedule Of Equity Method Investments [Line Items]              
Percentage of ownership interest   34.00%          
OpCo | Stateline              
Schedule Of Equity Method Investments [Line Items]              
Percentage of ownership interest     34.00%   34.00%    
OpCo | First Solar | Stateline              
Schedule Of Equity Method Investments [Line Items]              
Payment to acquire equity method investment   $ 329.5          
Investment after acquisition-related costs $ 329.9