v3.26.1
Property, Plant, and Equipment - Schedule of Amortization of Property, Plant, and Equipment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Property, Plant, and Equipment [Line Items]        
Total property, plant, and equipment expense $ 534 $ 621 $ 1,116 $ 1,217
Income Statement Location [Axis]: us-gaap:DepreciationDepletionAndAmortization | Power generation and structures and office and other equipment        
Property, Plant, and Equipment [Line Items]        
Total property, plant, and equipment expense 415 497 869 976
Income Statement Location [Axis]: us-gaap:DepreciationDepletionAndAmortization | Finance lease right-of-use assets        
Property, Plant, and Equipment [Line Items]        
Total property, plant, and equipment expense 3 2 5 4
Income Statement Location [Axis]: vistra:CostOfFuelPurchasedPowerAndDelivery | Nuclear fuel        
Property, Plant, and Equipment [Line Items]        
Total property, plant, and equipment expense $ 116 $ 122 $ 242 $ 237