XML 68 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
Acquisitions and Dispositions (Merchant Solar Projects) (Narrative) (Detail)
$ in Millions
1 Months Ended 6 Months Ended
Dec. 31, 2017
USD ($)
MW
Nov. 30, 2017
USD ($)
MW
Oct. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
project
MW
May 31, 2017
USD ($)
project
Apr. 30, 2017
MW
Mar. 31, 2017
USD ($)
project
Feb. 28, 2017
USD ($)
Aug. 31, 2016
project
Jun. 30, 2018
USD ($)
MW
Jun. 30, 2017
USD ($)
Jan. 31, 2017
Sep. 30, 2016
Business Acquisition And Dispositions [Line Items]                            
Cost of project                     $ 51 $ 280    
Solar Frontier Americas Holding, LLC                            
Business Acquisition And Dispositions [Line Items]                            
Percentage of equity interests acquired                   100.00%        
Number of projects | project               1   2        
Cash consideration               $ 77            
Cost of project         $ 78                  
MW capacity | MW         30                  
Discontinued efforts on acquisition of additional MW capacity | MW             20              
Community Energy Solar, LLC                            
Business Acquisition And Dispositions [Line Items]                            
Percentage of equity interests acquired                           100.00%
Cash consideration                 $ 29          
Cost of project $ 205                          
MW capacity | MW 100                          
Solar Projects from Cypress Creek Renewables, LLC                            
Business Acquisition And Dispositions [Line Items]                            
Percentage of equity interests acquired                         100.00%  
Cash consideration           $ 154                
Cost of project         $ 160                  
MW capacity | MW         79                  
Solar Projects from Hecate Energy Virginia C&C LLC                            
Business Acquisition And Dispositions [Line Items]                            
Percentage of equity interests acquired           100.00%                
Number of projects | project         1 2                
Cash consideration       $ 40 $ 16 $ 56                
Cost of project   $ 57                        
MW capacity | MW                     30      
Solar Projects from Strata Solar Development, LLC and Moorings Farm 2 Holdco, LLC                            
Business Acquisition And Dispositions [Line Items]                            
Percentage of equity interests acquired         100.00%             100.00%    
Cost of project   $ 41                        
MW capacity | MW   20                        
Four Solar Projects from Strata Solar Development, LLC and Moorings Farm 2 Holdco, LLC                            
Business Acquisition And Dispositions [Line Items]                            
Number of projects | project         4                  
Cash consideration         $ 40                  
Two Solar Projects from Strata Solar Development, LLC and Moorings Farm 2 Holdco, LLC                            
Business Acquisition And Dispositions [Line Items]                            
Number of projects | project         2                  
Cash consideration     $ 20   $ 20