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Equity - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 2 Months Ended 12 Months Ended 27 Months Ended 29 Months Ended
Jan. 01, 2023
Dec. 10, 2021
Oct. 15, 2021
Feb. 29, 2024
Feb. 23, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2023
Feb. 23, 2024
Dec. 29, 2023
Mar. 31, 2023
Aug. 31, 2022
Oct. 31, 2021
Sep. 30, 2020
Accelerated Share Repurchases [Line Items]                              
Shares repurchased (in shares)           44,994,499 78,470,547 27,988,518              
Stock repurchases           $ 1,267 $ 1,837 $ 585              
Issuances of preferred stock           0 0 2,000              
Tax receivable agreement, outstanding repurchase rights percentage 98.00%                            
Maximum allowable distribution to parent company by consolidated subsidiary without consent           6,300     $ 6,300            
Change in funded status of pension and other postretirement employee benefit liability           5 (23) (24)              
Reclassification from accumulated other comprehensive income, current period, net of tax           $ 4 0 8              
Class of warrant or right, exercise price of warrants or rights (in dollars per share)           $ 35.00     $ 35.00            
Class of warrant or right, number of securities called by each warrant or right (in shares)           0.652     0.652            
Class of warrant or right, outstanding (in shares)           9,000,000     9,000,000            
Vistra Corp. | Vistra Operations Company LLC                              
Accelerated Share Repurchases [Line Items]                              
Maximum allowable distribution to parent company by consolidated subsidiary without consent           $ 6,300     $ 6,300            
Cash dividends paid           $ 1,625 $ 1,775 $ 405              
Subsequent Event                              
Accelerated Share Repurchases [Line Items]                              
Common stock, dividends, per share, declared (in dollars per share)       $ 0.215                      
Series A Preferred Stock                              
Accelerated Share Repurchases [Line Items]                              
Preferred stock, shares issued (in shares)     1,000,000                        
Issuances of preferred stock     $ 990                        
Preferred stock, dividend rate, percentage           8.00%                  
Preferred stock, dividend rate, first reset date and thereafter, rate floor, percentage           1.07%                  
Preferred stock, dividend rate, first reset date and thereafter, basis spread on variable rate, percentage           6.93%                  
Preferred sock, liquidation preference           $ 1,000 $ 1,000   $ 1,000            
Series A Preferred Stock | Subsequent Event                              
Accelerated Share Repurchases [Line Items]                              
Preferred stock, dividends per share, declared (in dollars per share)       $ 40.00                      
Series B Preferred Stock                              
Accelerated Share Repurchases [Line Items]                              
Preferred stock, shares issued (in shares)   1,000,000                          
Issuances of preferred stock   $ 985                          
Preferred stock, dividend rate, percentage           7.00%                  
Preferred stock, dividend rate, first reset date and thereafter, rate floor, percentage           1.26%                  
Preferred stock, dividend rate, first reset date and thereafter, basis spread on variable rate, percentage           5.74%                  
Preferred sock, liquidation preference           $ 1,000 1,000   1,000            
Series C Preferred Stock                              
Accelerated Share Repurchases [Line Items]                              
Preferred stock, shares issued (in shares)                     476,081        
Preferred stock, dividend rate, percentage           8.875%                  
Preferred stock, dividend rate, first reset date and thereafter, rate floor, percentage           3.83%                  
Preferred stock, dividend rate, first reset date and thereafter, basis spread on variable rate, percentage           5.045%                  
Preferred sock, liquidation preference           $ 1,000 $ 1,000   $ 1,000            
Share Repurchase Program Approved by the Board of Directors in October 2021                              
Accelerated Share Repurchases [Line Items]                              
Stock repurchase program, authorized amount                           $ 2,000  
Incremental Share Repurchase Program Approved by the Board Of Directors in August 2022                              
Accelerated Share Repurchases [Line Items]                              
Stock repurchase program, authorized amount                         $ 1,250    
Incremental Share Repurchase Program Approved by the Board Of Directors in March 2023                              
Accelerated Share Repurchases [Line Items]                              
Stock repurchase program, authorized amount                       $ 1,000      
Incremental Share Repurchase Program Approved by the Board Of Directors in March 2023 | Subsequent Event                              
Accelerated Share Repurchases [Line Items]                              
Stock repurchase program, authorized amount       $ 1,500                      
Share Repurchase Program                              
Accelerated Share Repurchases [Line Items]                              
Stock repurchase program, authorized amount           $ 5,750     $ 5,750            
Shares repurchased (in shares)           44,994,499 78,470,547 19,330,365 142,795,411            
Stock repurchases           $ 1,255 $ 1,836 $ 409 $ 3,500            
Average price paid per share (in dollars per share)           $ 27.89 $ 23.40 $ 21.16 $ 24.51            
Share Repurchase Program | Subsequent Event                              
Accelerated Share Repurchases [Line Items]                              
Shares repurchased (in shares)         4,489,651         147,285,062          
Stock repurchases         $ 186         $ 3,686          
Average price paid per share (in dollars per share)         $ 41.39         $ 25.03          
Share Repurchase Program Approved by Board of Directors in September 2020                              
Accelerated Share Repurchases [Line Items]                              
Stock repurchase program, authorized amount                             $ 1,500
Shares repurchased (in shares)               8,658,153              
Stock repurchases               $ 175              
Average price paid per share (in dollars per share)               $ 20.21