SAN ONOFRE NUCLEAR GENERATING STATION (Tables)

3 Months Ended

Mar. 31, 2024

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 8.

NUCLEAR DECOMMISSIONING TRUSTS
(Dollars in millions)
	Cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
	March 31, 2024
Short-term investments, primarily cash equivalents	$	28	$	—	$	—	$	28
Equity securities	89		239		(3)		325
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies(1)	59		1		(1)		59
Municipal bonds(2)	277		2		(9)		270
Other securities(3)	231		1		(10)		222
Total debt securities	567		4		(20)		551
Receivables (payables), net	(18)		—		—		(18)
Total	$	666	$	243	$	(23)	$	886
	December 31, 2023
Short-term investments, primarily cash equivalents	$	21	$	—	$	—	$	21
Equity securities	89		225		(2)		312
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	50		2		(1)		51
Municipal bonds	280		3		(8)		275
Other securities	228		3		(11)		220
Total debt securities	558		8		(20)		546
Receivables (payables), net	(7)		—		—		(7)
Total	$	661	$	233	$	(22)	$	872

(1)    Maturity dates are 2025-2054.

(2)    Maturity dates are 2024-2062.

(3)    Maturity dates are 2024-2072.

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,
	2024		2023
Proceeds from sales	$	181	$	156
Gross realized gains	14		2
Gross realized losses	(2)		(3)