SAN ONOFRE NUCLEAR GENERATING STATION (Tables)

3 Months Ended

Mar. 31, 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)
	Cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
	March 31, 2025
Short-term investments, primarily cash equivalents	$	18	$	—	$	—	$	18
Equity securities	72		211		(3)		280
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies(1)	61		1		(1)		61
Municipal bonds(2)	296		1		(9)		288
Other securities(3)	239		3		(6)		236
Total debt securities	596		5		(16)		585
Receivables (payables), net	(18)		—		—		(18)
Total	$	668	$	216	$	(19)	$	865
	December 31, 2024
Short-term investments, primarily cash equivalents	$	10	$	—	$	—	$	10
Equity securities	78		223		(3)		298
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	67		1		(1)		67
Municipal bonds	295		1		(9)		287
Other securities	234		2		(8)		228
Total debt securities	596		4		(18)		582
Receivables (payables), net	(15)		—		—		(15)
Total	$	669	$	227	$	(21)	$	875

(1)    Maturity dates are 2025-2055.

(2)    Maturity dates are 2025-2058.

(3)    Maturity dates are 2025-2069.

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 March 31,
	2025		2024
Proceeds from sales	$	274	$	181
Gross realized gains	10		14
Gross realized losses	2		2