SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - (Government Assistance) (Details) - USD ($)			12 Months Ended
	Jan. 11, 2024	Oct. 18, 2022	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Senate Bill 846 | Utility
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount		$ 1,100,000,000
Senate Bill 846 | Utility | Maximum
Public Utility, Property, Plant and Equipment [Line Items]
Debt instrument, face amount		1,400,000,000
Performance-Based Disbursement
Public Utility, Property, Plant and Equipment [Line Items]
Disbursement		7
Reimbursement amount					$ 56,000,000
Maximum disbursement		$ 300,000,000
Civil Nuclear Credit Program
Public Utility, Property, Plant and Equipment [Line Items]
Maximum disbursement	$ 1,100,000,000
Civil Nuclear Credit Program | Cost of Goods and Services Sold, Electricity
Public Utility, Property, Plant and Equipment [Line Items]
Reimbursement amount			$ 65,000,000	$ 265,000,000	115,000,000
Civil Nuclear Credit Program | Utilities Operating Expense, Maintenance and Operations
Public Utility, Property, Plant and Equipment [Line Items]
Reimbursement amount			69,000,000	$ 138,000,000	$ 76,000,000
Civil Nuclear Credit Program, Incurred Fuel Costs
Public Utility, Property, Plant and Equipment [Line Items]
Disbursement			$ 13,000,000