v3.26.1
Debt, Credit Facilities, and Financings - Narrative (Details)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Sep. 18, 2024
USD ($)
Jun. 30, 2026
USD ($)
megawatt
Apr. 30, 2026
USD ($)
Jan. 31, 2026
USD ($)
Oct. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Jul. 31, 2027
USD ($)
Jul. 31, 2026
USD ($)
Dec. 31, 2024
USD ($)
Debt Instrument [Line Items]                        
Facility Limit   $ 8,883         $ 8,883          
Long-term debt and lease obligation, including current maturities   19,595         19,595   $ 17,043      
Line of credit facility, borrowings outstanding   1,633         1,633          
Proceeds from lines of credit             400 $ 0        
Accounts receivable financing   $ 300         $ 300   1,225      
Accounts receivable repurchase facility, term   1 month         1 month          
Payments to acquire interest in subsidiaries and affiliates $ 3,200                      
Redeemable noncontrolling interest, payments   $ 38                    
Redeemable noncontrolling interest, principal payment   19         $ 19 $ 41        
Redeemable noncontrolling interest, interest payment   19                    
Vistra Vision                        
Debt Instrument [Line Items]                        
Subsidiary, ownership percentage, noncontrolling owner 15.00%                      
Redeemable noncontrolling interest, to be paid   $ 631         631          
Forward repurchase obligation to be paid             $ 613   $ 632      
Vistra Vision | Measurement Input, Discount Rate                        
Debt Instrument [Line Items]                        
Noncontrolling interest, discount rate   0.06         0.06   0.06      
Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Debt instrument, basis spread on variable rate             35.00%          
Line of Credit                        
Debt Instrument [Line Items]                        
Facility Limit   $ 5,500         $ 5,500          
Line of credit facility, borrowings outstanding   0         0          
Line of Credit | Vistra Operations Company LLC                        
Debt Instrument [Line Items]                        
Facility Limit   $ 5,500         $ 5,500          
Debt instrument, interest rate during period               5.22%        
Letter of Credit                        
Debt Instrument [Line Items]                        
Debt instrument, interest rate, stated percentage   2.00%         2.00%          
Letter of Credit | Vistra Operations Company LLC                        
Debt Instrument [Line Items]                        
Facility Limit   $ 5,475         $ 5,475          
Commitments of credit facility   $ 3,440         $ 3,440          
Bridge Loans                        
Debt Instrument [Line Items]                        
Debt instrument, interest rate, stated percentage   1.625%         1.625%          
Construction Loans                        
Debt Instrument [Line Items]                        
Debt instrument, interest rate, stated percentage   1.875%         1.875%          
Term Loan                        
Debt Instrument [Line Items]                        
Debt instrument, interest rate, stated percentage   2.00%         2.00%          
Debt, weighted average interest rate   5.589%         5.589%          
Term loan period (in years)             20 years          
Revenue Bonds                        
Debt Instrument [Line Items]                        
Debt instrument, face amount   $ 431         $ 431          
Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Long-term debt and lease obligation, including current maturities   17,650         $ 17,650   $ 12,700      
Senior Notes                        
Debt Instrument [Line Items]                        
Proceeds from debt, net of issuance costs     $ 3,968 $ 2,230                
Term Loan B-3 Facility | Line of Credit                        
Debt Instrument [Line Items]                        
Collateral suspension provision effective date, grace period, number of days             60 days          
Debt instrument, face amount     2,444                  
Revolving Credit Facility | Line of Credit                        
Debt Instrument [Line Items]                        
Facility Limit   5,500         $ 5,500          
Line of credit facility, borrowings outstanding   $ 0         $ 0          
Revolving Credit Facility | Line of Credit | Vistra Operations Company LLC                        
Debt Instrument [Line Items]                        
Debt instrument, basis spread on variable rate             1.75%          
Debt instrument, fee on undrawn amounts             0.275          
Debt instrument, interest rate, stated percentage   1.75%         1.75%          
Revolving Credit Facility | Line of Credit | Vistra Operations Company LLC | Minimum                        
Debt Instrument [Line Items]                        
Debt instrument, basis spread on variable rate             1.25%          
Debt instrument, fee on undrawn amounts             0.175          
Revolving Credit Facility | Line of Credit | Vistra Operations Company LLC | Maximum                        
Debt Instrument [Line Items]                        
Debt instrument, basis spread on variable rate             2.00%          
Debt instrument, fee on undrawn amounts             0.350          
Revolving Credit Facility | Letter of Credit                        
Debt Instrument [Line Items]                        
Facility Limit   $ 5,475         $ 5,475          
Vistra Operations Commodity-Linked Facility | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Facility Limit   1,750         1,750          
Line of credit facility, borrowings outstanding   0         $ 0          
Vistra Operations Commodity-Linked Facility | Revolving Credit Facility | Vistra Operations Company LLC                        
Debt Instrument [Line Items]                        
Debt instrument, basis spread on variable rate             1.75%          
Debt instrument, fee on undrawn amounts             0.275          
Line of credit facility, borrowing base capacity limit   1,452         $ 1,452          
Vistra Operations Commodity-Linked Facility | Revolving Credit Facility | Vistra Operations Company LLC | Minimum                        
Debt Instrument [Line Items]                        
Debt instrument, basis spread on variable rate             1.25%          
Debt instrument, fee on undrawn amounts             0.175          
Vistra Operations Commodity-Linked Facility | Revolving Credit Facility | Vistra Operations Company LLC | Maximum                        
Debt Instrument [Line Items]                        
Debt instrument, basis spread on variable rate             2.00%          
Debt instrument, fee on undrawn amounts             0.350          
Line of credit facility, potential borrowing capacity, subject to ability to obtain additional commitments   3,000         $ 3,000          
BCOP Credit Facility                        
Debt Instrument [Line Items]                        
Facility Limit   764         764          
Line of credit facility, borrowings outstanding   $ 764         $ 764          
BCOP Credit Facility | Line of Credit | Secured Debt                        
Debt Instrument [Line Items]                        
Debt, weighted average interest rate   5.288%         5.288%          
BCOP Credit Facility | Letter of Credit                        
Debt Instrument [Line Items]                        
Letters of credit outstanding                       $ 29
BCOP Credit Facility | Bridge Loans                        
Debt Instrument [Line Items]                        
Facility Limit   $ 261         $ 261          
Long-term debt and lease obligation, including current maturities   261         261   367     367
Line of credit facility, borrowings outstanding   261   106     261          
BCOP Credit Facility | Bridge Loans | Pulaski                        
Debt Instrument [Line Items]                        
Line of credit facility, borrowings outstanding   261         261          
Construction/Term Loan Commitments | Line of Credit | Secured Debt                        
Debt Instrument [Line Items]                        
Facility Limit                       $ 528
Pulaski | Construction Loans                        
Debt Instrument [Line Items]                        
Debt instrument, face amount   297         297          
Coffeen Term Loan | Letter of Credit                        
Debt Instrument [Line Items]                        
Debt instrument, face amount   13         13          
Coffeen Term Loan | Construction Loans                        
Debt Instrument [Line Items]                        
Debt instrument, face amount   206         206          
Oak Hill | Construction Loans                        
Debt Instrument [Line Items]                        
Debt instrument, face amount   206         206          
Baldwin Term Loan | Letter of Credit                        
Debt Instrument [Line Items]                        
Debt instrument, face amount   13         13          
Baldwin Term Loan | Construction Loans                        
Debt Instrument [Line Items]                        
Debt instrument, face amount   $ 206         $ 206          
Vistra Zero Project-Level Credit Agreement | Line of Credit | Secured Debt                        
Debt Instrument [Line Items]                        
Debt instrument, face amount           $ 700            
Debt instrument, basis spread on variable rate             2.00%          
Debt, weighted average interest rate   5.644%         5.644%          
Proceeds from lines of credit           690            
Vistra Zero Term Loan B Facility | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Facility Limit   $ 697         $ 697          
Line of credit facility, borrowings outstanding   697         697          
Texas Energy Fund (TxEF) Loan, due June 18, 2046 | Line of Credit | Secured Debt                        
Debt Instrument [Line Items]                        
Facility Limit   $ 583         $ 583          
Debt instrument, interest rate, stated percentage   3.00%         3.00%          
Natural gas-fueled megawatts | megawatt   860                    
Commitments of credit facility   $ 172         $ 172          
Texas Energy Fund (TxEF) Loan, due June 18, 2046 | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Facility Limit   172         172          
Line of credit facility, borrowings outstanding   172         172          
Secured Letter of Credit Facilities | Letter of Credit | Vistra Operations Company LLC                        
Debt Instrument [Line Items]                        
Letters of credit outstanding   1,759         1,759          
Alternate Letter Of Credit Facility | Letter of Credit                        
Debt Instrument [Line Items]                        
Facility Limit   760         760          
Letters of credit outstanding   $ 736         $ 736          
Line of credit facility, increase (decrease), net         $ 800 $ 500            
Financial Covenant One | Maximum | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Covenant net leverage ratio             5.50          
Financial Covenant Two | Maximum | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Covenant net leverage ratio             5.50          
Covenant first-lien leverage ratio             4.25          
Senior Secured Notes Due | Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount     4,000 2,250                
4.700% Senior Notes, due January 31, 2031 | Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount       $ 1,000                
Debt instrument, interest rate, stated percentage   4.70%   4.70%     4.70%          
Long-term debt and lease obligation, including current maturities   $ 1,000         $ 1,000   0      
5.350% Senior Notes, due January 31, 2036 | Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount       $ 1,250                
Debt instrument, interest rate, stated percentage   5.35%   5.35%     5.35%          
Long-term debt and lease obligation, including current maturities   $ 1,250         $ 1,250   0      
4.550% Senior Unsecured Notes Due 2028 | Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount     $ 500                  
Debt instrument, interest rate, stated percentage     4.55%                  
5.000% Senior Unsecured Notes Due 2031 | Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount     $ 1,000                  
Debt instrument, interest rate, stated percentage     5.00%                  
5.250% Senior Unsecured Notes Due 2033 | Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount     $ 1,000                  
Debt instrument, interest rate, stated percentage     5.25%                  
5.550% Senior Unsecured Notes Due 2036 | Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Debt instrument, face amount     $ 1,500                  
Debt instrument, interest rate, stated percentage     5.55%                  
5.625% Senior Notes, due February 15, 2027 | Vistra Operations Senior Notes                        
Debt Instrument [Line Items]                        
Debt instrument, interest rate, stated percentage   5.625% 5.625%       5.625%          
Long-term debt and lease obligation, including current maturities   $ 0         $ 0   1,300      
Accounts Receivable Securitization Program                        
Debt Instrument [Line Items]                        
Accounts receivable financing   300         300   1,100      
Accounts receivable securitization program, gross trade accounts receivable held by special purpose subsidiary   1,609         1,609          
Accounts Receivable Securitization Program | Minimum | Subsequent Event                        
Debt Instrument [Line Items]                        
Account receivable securitization program, total borrowing capacity                     $ 1,100  
Accounts Receivable Securitization Program | Maximum | Forecast                        
Debt Instrument [Line Items]                        
Account receivable securitization program, total borrowing capacity                   $ 1,250    
Repurchase Facility                        
Debt Instrument [Line Items]                        
Accounts receivable repurchase facility, amounts borrowed   $ 0         $ 0   $ 125      
Repurchase Facility | Subsequent Event                        
Debt Instrument [Line Items]                        
Accounts receivable repurchase facility, maximum borrowing capacity                     $ 125