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Commitments and Contingencies - PVNGS Liability and Insurance Matters (Details) - Palo Verde Nuclear Generating Station - Nuclear plant - Public Service Company of New Mexico
$ in Millions
Mar. 31, 2025
USD ($)
Mar. 28, 2024
bond
Public Utilities, Commitments And Contingencies [Line Items]    
Maximum retrospective premium per reactor $ 165.9  
Maximum annual premium per incident 24.7  
Number of nuclear power plants owned | bond   3
Maximum potential assessment per incident 36.3  
Annual payment limitation related to incident 5.4  
Aggregate amount of all risk insurance 2,800.0  
Maximum amount under nuclear electric insurance limited 5.1  
Commercial providers    
Public Utilities, Commitments And Contingencies [Line Items]    
Liability insurance coverage 500.0  
Industry Wide Retrospective Assessment Program    
Public Utilities, Commitments And Contingencies [Line Items]    
Liability insurance coverage 15,800.0  
Maximum    
Public Utilities, Commitments And Contingencies [Line Items]    
Liability insurance coverage 16,300.0  
Liability insurance coverage sublimit $ 2,250.0