v3.25.2
SAN ONOFRE NUCLEAR GENERATING STATION (Tables)
 6 Months Ended
Jun. 30, 2025
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, 2025
Short-term investments, primarily cash equivalents$16 $— $— $16 
Equity securities69 218 (2)285 
Debt securities:    
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies(1)
48 2 (1)49 
Municipal bonds(2)
302 1 (9)294 
Other securities(3)
246 4 (4)246 
Total debt securities596 7 (14)589 
Receivables (payables), net(12)— — (12)
Total$669 $225 $(16)$878 
December 31, 2024
Short-term investments, primarily cash equivalents$10 $— $— $10 
Equity securities78 223 (3)298 
Debt securities:    
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies67 1 (1)67 
Municipal bonds295 1 (9)287 
Other securities234 2 (8)228 
Total debt securities596 4 (18)582 
Receivables (payables), net(15)— — (15)
Total$669 $227 $(21)$875 
(1)    Maturity dates are 2025-2055.
(2)    Maturity dates are 2025-2065.
(3)    Maturity dates are 2025-2070.
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,
 2025202420252024
Proceeds from sales$225 $199 $499 $380 
Gross realized gains21 10 31 24 
Gross realized losses3 3 5 5