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Cover - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 23, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-38086    
Entity Registrant Name Vistra Corp.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 36-4833255    
Entity Address, Address Line One 6555 Sierra Drive    
Entity Address, City or Town Irving,    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 75039    
City Area Code (214)    
Local Phone Number 812-4600    
Title of 12(b) Security Common stock, par value $0.01 per share    
Trading Symbol VST    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 9,654,651,880
Entity Common Stock, Shares Outstanding   347,885,110  
Documents Incorporated by Reference
Portions of the Registrant's definitive Proxy Statement relating to its 2024 Annual Meeting of Stockholders are incorporated by reference in Part III of this annual report on Form 10-K.
    
Entity Central Index Key 0001692819    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false