v3.26.3
FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS (Schedule of Financial Instruments Measured at Fair Value on Recurring Basis) (Details) - USD ($)
Sep. 30, 2026
Dec. 31, 2025
Assets    
Restricted Cash $ 24,000,000 $ 30,000,000
Energy Derivative Contracts, Regulatory Recovery 20,000,000 28,000,000
Energy Derivative Contracts, No Regulatory Recovery 12,000,000 2,000,000
Total Assets 116,000,000 60,000,000
Liabilities    
Energy Derivative Contracts, Regulatory Recovery (22,000,000) (33,000,000)
Total Liabilities (22,000,000) (33,000,000)
Total Assets (Liabilities), Net 94,000,000 27,000,000
Recurring    
Assets    
Cash Equivalents 60,000,000  
Level 3    
Liabilities    
Total Assets (Liabilities), Net 0  
Level 1    
Assets    
Restricted Cash 24,000,000 30,000,000
Energy Derivative Contracts, Regulatory Recovery 0 0
Energy Derivative Contracts, No Regulatory Recovery 0 0
Total Assets 84,000,000 30,000,000
Liabilities    
Energy Derivative Contracts, Regulatory Recovery 0 0
Total Liabilities 0 0
Total Assets (Liabilities), Net 84,000,000 30,000,000
Level 1 | Recurring    
Assets    
Cash Equivalents 60,000,000  
Level 2    
Assets    
Restricted Cash 0 0
Energy Derivative Contracts, Regulatory Recovery 20,000,000 28,000,000
Energy Derivative Contracts, No Regulatory Recovery 12,000,000 2,000,000
Total Assets 32,000,000 30,000,000
Liabilities    
Energy Derivative Contracts, Regulatory Recovery (22,000,000) (33,000,000)
Total Liabilities (22,000,000) (33,000,000)
Total Assets (Liabilities), Net 10,000,000 $ (3,000,000)
Level 2 | Recurring    
Assets    
Cash Equivalents $ 0