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CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS - SPC Noncontrolling Interests and VIEs Narrative (Details)
1 Months Ended 12 Months Ended
Dec. 11, 2018
wind_farm
investor
May 22, 2018
Aug. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
wind_farm
Sep. 30, 2018
operating_facility
Dec. 31, 2019
USD ($)
Dec. 31, 2017
USD ($)
Oct. 31, 2017
Redeemable Noncontrolling Interest [Line Items]                
Equity method investments in wind and battery storage projects       $ 269,000,000   $ 391,000,000    
Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Equity method investments in wind and battery storage projects       0   28,000,000    
Number of wind facilities | operating_facility         8      
Reclassification from redeemable noncontrolling interest       $ 0   $ 0 $ 0  
SunPower Corp | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Reclassification from redeemable noncontrolling interest             (114,000,000)  
Reclassification to nonredeemable noncontrolling interest             $ 114,000,000  
SP Solar Holdings I, LP | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Sale of equity interest in limited partnership   33.00%            
Distribution made to limited partner, cash distributions paid, percentage           67.00%    
SP Solar Holdings I, LP | Global Atlantic                
Redeemable Noncontrolling Interest [Line Items]                
Distribution made to limited partner, cash distributions paid, percentage           33.00%    
SP Solar Holdings I, LP | Wholly Owned Subsidiary Of Southern Power | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Ownership interest   66.00%            
SP Wind                
Redeemable Noncontrolling Interest [Line Items]                
Number of wind facilities | wind_farm 8     8        
SP Wind | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Sale of equity interest in limited partnership 100.00%              
Distribution made to limited partner, cash distributions paid, percentage           60.00%    
Number of financial investors | investor 3              
SP Wind | Financial Investors                
Redeemable Noncontrolling Interest [Line Items]                
Distribution made to limited partner, cash distributions paid, percentage       40.00%   40.00%    
SP Wind | Wholly Owned Subsidiary Of Southern Power | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Ownership interest 100.00%              
General Partner | SP Solar Holdings I, LP | Wholly Owned Subsidiary Of Southern Power | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Ownership interest   1.00%            
Variable Interest Entity, Primary Beneficiary | SP Solar Holdings I, LP | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Assets       $ 6,300,000,000   $ 6,400,000,000    
Liabilities       113,000,000   381,000,000    
Noncontrolling interests related to other partners' interest       1,200,000,000   1,100,000,000    
Variable Interest Entity, Primary Beneficiary | SP Wind | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Assets       2,500,000,000   2,500,000,000    
Liabilities       51,000,000   128,000,000    
Noncontrolling interests related to other partners' interest       47,000,000   45,000,000    
Variable Interest Entity, Primary Beneficiary | Other Variable Interest Entities | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Assets       858,000,000   1,100,000,000    
Liabilities       80,000,000   104,000,000    
Noncontrolling interests related to other partners' interest       $ 241,000,000   $ 409,000,000    
Variable Interest Entity, Primary Beneficiary | DSGP | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Assets     $ 107,000,000          
Liabilities     51,000,000          
Noncontrolling interests related to other partners' interest     56,000,000          
Cash transferred as a result of this reconsideration event     $ 0          
Southern Power Solar Facilities | Turner Renewable Energy | Southern Power                
Redeemable Noncontrolling Interest [Line Items]                
Ownership percentage of noncontrolling interest               10.00%