v3.26.1
Summary of Significant Accounting and Reporting Policies - Narrative (Details)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 28, 2026
USD ($)
jointVenture
Jun. 30, 2026
USD ($)
jointVenture
site
Mar. 31, 2026
USD ($)
jointVenture
site
MW
Sep. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Accounting Policies [Line Items]              
Cash and Cash Equivalents, Project Level   $ 260     $ 260   $ 334
Restricted cash, current   61     61   62
Tax Credit Carryforward, Amount Sold         (50) $ (3)  
Capital Expenditures And Other Investments         266 $ 170  
Property, plant and equipment – net   15,185     15,185   15,366
Assets   18,989     18,989   19,595
Investments in equity method investees   $ 629     $ 629   $ 625
Number Of Joint Ventures | jointVenture   2 4        
Number Of Operating Sites | site   2          
Generation facility capacity (mw) | MW     500        
Forecast              
Accounting Policies [Line Items]              
Gain (Loss) on Disposition of Assets       $ 23      
XPLR OpCo | Joint Venture              
Accounting Policies [Line Items]              
Equity Method Investment, Ownership Percentage     49.00%        
NEER Subsidiary | Joint Venture              
Accounting Policies [Line Items]              
Equity Method Investment, Ownership Percentage     51.00%        
one operating site | NEER Subsidiary              
Accounting Policies [Line Items]              
Number Of Operating Sites | site     1        
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Interconnection Assets and Rights              
Accounting Policies [Line Items]              
Consideration     $ 19        
Subsequent Event              
Accounting Policies [Line Items]              
Number Of Joint Ventures | jointVenture 2            
Subsequent Event | Mammoth Plains Energy Storage Company, LLC, And Carousel Energy Storage Project Company, LLC              
Accounting Policies [Line Items]              
Investments in equity method investees $ 13            
Subsequent Event | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Assets And Rights At Project Sites              
Accounting Policies [Line Items]              
Consideration $ 26            
XPLR OpCo              
Accounting Policies [Line Items]              
Noncontrolling limited partner interest percentage   51.20%     51.20%    
Silver State [Member]              
Accounting Policies [Line Items]              
Noncontrolling limited partner interest percentage   50.00%     50.00%    
Sunlight Renewable Holdings              
Accounting Policies [Line Items]              
Noncontrolling limited partner interest percentage   33.00%     33.00%    
Star Moon Holdings, LLC              
Accounting Policies [Line Items]              
Noncontrolling limited partner interest percentage   50.00%     50.00%    
Emerald Breeze Holdings              
Accounting Policies [Line Items]              
Noncontrolling limited partner interest percentage   51.00%     51.00%