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SAN ONOFRE NUCLEAR GENERATING STATION - NUCLEAR DECOMMISSIONING TRUSTS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | $ 686 |  | $ 686 |  | $ 678
Gross unrealized gains | 245 |  | 245 |  | 231
Gross unrealized losses | (11) |  | (11) |  | (10)
Estimated fair value | 920 |  | 920 |  | 899
Proceeds from sales |  |  | 679 | $ 580 |
SDG&E |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Proceeds from sales | 225 | $ 225 | 516 | 499 |
Gross realized gains | 11 | 21 | 20 | 31 |
Gross realized losses | 2 | $ 3 | 4 | $ 5 |
Short-term investments, primarily cash equivalents |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | 19 |  | 19 |  | 12
Gross unrealized gains | 0 |  | 0 |  | 0
Gross unrealized losses | 0 |  | 0 |  | 0
Estimated fair value | 19 |  | 19 |  | 12
Equity securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | 66 |  | 66 |  | 69
Gross unrealized gains | 239 |  | 239 |  | 221
Gross unrealized losses | (2) |  | (2) |  | (2)
Estimated fair value | 303 |  | 303 |  | 288
Total debt securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | 612 |  | 612 |  | 600
Gross unrealized gains | 6 |  | 6 |  | 10
Gross unrealized losses | (9) |  | (9) |  | (8)
Estimated fair value | 609 |  | 609 |  | 602
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | 45 |  | 45 |  | 46
Gross unrealized gains | 1 |  | 1 |  | 1
Gross unrealized losses | (1) |  | (1) |  | 0
Estimated fair value | 45 |  | 45 |  | 47
Municipal bonds |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | 301 |  | 301 |  | 301
Gross unrealized gains | 3 |  | 3 |  | 4
Gross unrealized losses | (4) |  | (4) |  | (5)
Estimated fair value | 300 |  | 300 |  | 300
Other securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | 266 |  | 266 |  | 253
Gross unrealized gains | 2 |  | 2 |  | 5
Gross unrealized losses | (4) |  | (4) |  | (3)
Estimated fair value | 264 |  | 264 |  | 255
Receivables (payables), net |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Cost | (11) |  | (11) |  | (3)
Gross unrealized gains | 0 |  | 0 |  | 0
Gross unrealized losses | 0 |  | 0 |  | 0
Estimated fair value | $ (11) |  | $ (11) |  | $ (3)

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