Commitments and Contingencies - Narrative Nuclear Insurance (Details) $ in Millions	Dec. 31, 2024 USD ($)
Long-term Purchase Commitment [Line Items]
Secondary financial protection pool, maximum assessment paid per operating licensed reactor in the event of any single nuclear liability loss	$ 165.9
Secondary financial protection pool, maximum assessment paid per operating licensed reactor in the event of any single nuclear liability loss, annual	24.7
Comanche Peak Nuclear Power Plant
Long-term Purchase Commitment [Line Items]
Nuclear decontamination and property insurance, maximum coverage	2,250.0
Non-nuclear property damage insurance, maximum coverage	1,000.0
Non-nuclear property damage insurance, deductible per accident, general	5.0
Non-nuclear property damage insurance, deductible per incident, natural hazard	9.5
Accidental outage insurance, coverage for obtaining replacement energy after 12 week waiting period, maximum weekly coverage, first 52 weeks	4.5
Accidental outage insurance, coverage for obtaining replacement energy after 12 week waiting period, maximum weekly payments, remining 21 weeks non-nuclear property	2.7
Accidental outage insurance, coverage for obtaining replacement energy after 12 week waiting period, maximum weekly payments, remaining 26 weeks non-nuclear and 71 weeks nuclear property	3.6
Accidental outage insurance, coverage for obtaining replacement energy, coverage limit for non-nuclear accidents	291.0
Accidental outage insurance, coverage for obtaining replacement energy, coverage limit for nuclear accidents	490.0
Beaver Valley Nuclear Power Station, Davis-Besse Nuclear Power Station and Perry Nuclear Generating Station
Long-term Purchase Commitment [Line Items]
Non-nuclear property damage insurance, maximum coverage	1,500.0
Non-nuclear property damage insurance, deductible per incident, natural hazard	20.0
Accidental outage insurance, coverage for obtaining replacement energy after 12 week waiting period, maximum weekly coverage, first 52 weeks	2.5
Accidental outage insurance, coverage for obtaining replacement energy, coverage limit for non-nuclear accidents	208.0
Accidental outage insurance, coverage for obtaining replacement energy, coverage limit for nuclear accidents	350.0
Accidental outage insurance, coverage for obtaining replacement energy after 12 week waiting period, maximum weekly payments, remaining 52 weeks non-nuclear and 52 weeks nuclear property	1.5
Accidental outage insurance coverage, coverage for obtaining replacement energy after 12 week waiting period, maximum weekly payments, remaining 52 weeks nuclear property	$ 2.0
Accidental outage insurance, coverage for obtaining replacement energy after 12 week waiting period, maximum percent of coverage if both units out of service	80.00%
Vistra Corp.
Long-term Purchase Commitment [Line Items]
Secondary financial protection pool, maximum assessment paid in the event of any single nuclear liability loss	$ 995.4
Secondary financial protection pool, maximum assessment paid in the event of any single nuclear liability loss, annual	148.2
Section 170 (Price-Anderson) of the Atomic Energy Act
Long-term Purchase Commitment [Line Items]
Nuclear insurance, annual coverage limit	16,200.0
Secondary financial protection pool, maximum single nuclear liability loss triggering assessment	500.0
United States Nuclear Regulatory Commission
Long-term Purchase Commitment [Line Items]
Nuclear decontamination and property insurance, maximum coverage	$ 1,060.0