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SAN ONOFRE NUCLEAR GENERATING STATION (Tables)
 6 Months Ended
Jun. 30, 2026
Public Utilities, General Disclosures [Abstract]  
Schedule of Nuclear Decommissioning Trusts Investments
Nuclear Decommissioning Trusts
The following table shows the fair values and gross unrealized gains and losses for the securities held in the NDT on the Sempra and SDG&E Condensed Consolidated Balance Sheets. We provide additional fair value disclosures for the NDT in Note 9.
NUCLEAR DECOMMISSIONING TRUSTS
(Dollars in millions)
CostGross
unrealized
gains		Gross
unrealized
losses		Estimated
fair
value
June 30, 2026
Short-term investments, primarily cash equivalents$19 $— $— $19 
Equity securities66 239 (2)303 
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies(1)
45 1 (1)45 
Municipal bonds(2)
301 3 (4)300 
Other securities(3)
266 2 (4)264 
Total debt securities612 6 (9)609 
Receivables (payables), net(11)— — (11)
Total$686 $245 $(11)$920 
December 31, 2025
Short-term investments, primarily cash equivalents$12 $— $— $12 
Equity securities69 221 (2)288 
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies46 1 — 47 
Municipal bonds301 4 (5)300 
Other securities253 5 (3)255 
Total debt securities600 10 (8)602 
Receivables (payables), net(3)— — (3)
Total$678 $231 $(10)$899 
(1)    Maturity dates are 2027-2056.
(2)    Maturity dates are 2026-2065.
(3)    Maturity dates are 2026-2071.
Schedule of Sales of Securities By Nuclear Decommissioning Trusts
The following table shows the proceeds from sales of securities in the NDT and gross realized gains and losses on those sales.
SALES OF SECURITIES IN THE NUCLEAR DECOMMISSIONING TRUSTS
(Dollars in millions)
Three months ended June 30,Six months ended June 30,
2026202520262025
Proceeds from sales$225 $225 $516 $499 
Gross realized gains11 21 20 31 
Gross realized losses2 3 4 5