ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplementary Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash Paid for:
Interest, Net of Capitalized Amounts	$ 1,894	$ 1,838	$ 1,674
Noncash Investing and Financing Activities:
Acquisitions Under Finance Leases	44	30	49
Construction Expenditures Included in Current Liabilities as of December 31,	1,935	1,312	842
Acquisition of Nuclear Fuel Included in Current Liabilities as of December 31,	10	24	24
Noncash Increase in Noncurrent Assets from the Sale of the Competitive Contracted Renewables Portfolio	$ 0	$ 0	$ 75