SAN ONOFRE NUCLEAR GENERATING STATION - NUCLEAR DECOMMISSIONING TRUSTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Cost	$ 678	$ 669
Gross unrealized gains	231	227
Gross unrealized losses	(10)	(21)
Estimated fair value	899	875
Proceeds from sales	974	874	$ 592
Gross realized gains	57	57	27
Gross realized losses	8	10	$ 14
Short-term investments, primarily cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cost	12	10
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	12	10
Equity securities
Debt Securities, Available-for-sale [Line Items]
Cost	69	78
Gross unrealized gains	221	223
Gross unrealized losses	(2)	(3)
Estimated fair value	288	298
Domestic government and government agencies
Debt Securities, Available-for-sale [Line Items]
Cost	46	67
Gross unrealized gains	1	1
Gross unrealized losses	0	(1)
Estimated fair value	47	67
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Cost	301	295
Gross unrealized gains	4	1
Gross unrealized losses	(5)	(9)
Estimated fair value	300	287
Other securities
Debt Securities, Available-for-sale [Line Items]
Cost	253	234
Gross unrealized gains	5	2
Gross unrealized losses	(3)	(8)
Estimated fair value	255	228
Total debt securities
Debt Securities, Available-for-sale [Line Items]
Cost	600	596
Gross unrealized gains	10	4
Gross unrealized losses	(8)	(18)
Estimated fair value	602	582
Receivables (payables), net
Debt Securities, Available-for-sale [Line Items]
Cost	(3)	(15)
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Estimated fair value	$ (3)	$ (15)