v3.26.1
Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Net income attributable to Vistra $ 305 $ 327 $ 1,334 $ 59
Less cumulative dividends attributable to preferred stock (47) (47) (96) (96)
Net income (loss) attributable to Vistra common stock $ 258 $ 280 $ 1,238 $ (37)
Weighted average shares of common stock outstanding:        
Basic (in shares) 336,846,562 339,401,983 337,332,362 339,599,887
Dilutive securities: Stock-based incentive compensation plan (in shares) 2,384,414 6,103,205 3,208,814 0
Diluted (in shares) 339,230,976 345,505,188 340,541,176 339,599,887
Net income (loss) per weighted average share of common stock outstanding:        
Basic (in dollars per share) $ 0.77 $ 0.82 $ 3.67 $ (0.11)
Diluted (in dollars per share) $ 0.76 $ 0.81 $ 3.64 $ (0.11)
Series A Preferred Stock        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Less cumulative dividends attributable to preferred stock $ (20) $ (20) $ (40) $ (40)
Series B Preferred Stock        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Less cumulative dividends attributable to preferred stock (17) (17) (35) (35)
Series C Preferred Stock        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Less cumulative dividends attributable to preferred stock $ (10) $ (10) $ (21) $ (21)