v3.26.1
Debt, Credit Facilities, and Financings - Schedule of Line of Credit Facilities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Jan. 31, 2026
Debt Instrument [Line Items]    
Facility Limit $ 8,883  
Borrowings Outstanding 1,633  
Letters of Credit Outstanding 1,092  
Available Capacity 5,860  
Line of Credit    
Debt Instrument [Line Items]    
Facility Limit 5,500  
Borrowings Outstanding 0  
Letters of Credit Outstanding 1,092  
Available Capacity 4,408  
Vistra Operations debt    
Debt Instrument [Line Items]    
Facility Limit 7,250  
Borrowings Outstanding 0  
Letters of Credit Outstanding 1,092  
Available Capacity 5,860  
Project-level debt    
Debt Instrument [Line Items]    
Facility Limit 1,633  
Borrowings Outstanding 1,633  
Letters of Credit Outstanding 0  
Available Capacity 0  
Revolving Credit Facility | Line of Credit    
Debt Instrument [Line Items]    
Facility Limit 5,500  
Borrowings Outstanding 0  
Letters of Credit Outstanding 1,092  
Available Capacity 4,408  
Vistra Operations Commodity-Linked Facility | Revolving Credit Facility    
Debt Instrument [Line Items]    
Facility Limit 1,750  
Borrowings Outstanding 0  
Letters of Credit Outstanding 0  
Available Capacity 1,452  
BCOP Credit Facility    
Debt Instrument [Line Items]    
Facility Limit 764  
Borrowings Outstanding 764  
Letters of Credit Outstanding 0  
Available Capacity 0  
BCOP Credit Facility | Bridge Loans    
Debt Instrument [Line Items]    
Facility Limit 261  
Borrowings Outstanding 261 $ 106
Letters of Credit Outstanding 0  
Available Capacity 0  
BCOP Credit Facility | Construction / Term Loans    
Debt Instrument [Line Items]    
Facility Limit 503  
Borrowings Outstanding 503  
Letters of Credit Outstanding 0  
Available Capacity 0  
Vistra Zero Term Loan B Facility | Revolving Credit Facility    
Debt Instrument [Line Items]    
Facility Limit 697  
Borrowings Outstanding 697  
Letters of Credit Outstanding 0  
Available Capacity 0  
Texas Energy Fund (TxEF) Loan | Revolving Credit Facility    
Debt Instrument [Line Items]    
Facility Limit 172  
Borrowings Outstanding 172  
Letters of Credit Outstanding 0  
Available Capacity $ 0