SAN ONOFRE NUCLEAR GENERATING STATION (Tables)

12 Months Ended

Dec. 31, 2022

Regulated Operations [Abstract]

Schedule of 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 Consolidated Balance Sheets. We provide additional fair value disclosures for the NDT in Note 12.

NUCLEAR DECOMMISSIONING TRUSTS
(Dollars in millions)
	Cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
	December 31, 2022
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies(1)	$	40	$	1	$	(1)	$	40
Municipal bonds(2)	283		1		(14)		270
Other securities(3)	248		—		(21)		227
Total debt securities	571		2		(36)		537
Equity securities	111		194		(8)		297
Short-term investments, primarily cash equivalents	11		—		—		11
Receivables (payables), net	(4)		—		—		(4)
Total	$	689	$	196	$	(44)	$	841
	December 31, 2021
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	$	56	$	—	$	—	$	56
Municipal bonds	309		13		(1)		321
Other securities	255		7		(2)		260
Total debt securities	620		20		(3)		637
Equity securities	104		262		(2)		364
Short-term investments, primarily cash equivalents	3		—		—		3
Receivables (payables), net	8		—		—		8
Total	$	735	$	282	$	(5)	$	1,012

(1)    Maturity dates are 2023-2053.

(2)    Maturity dates are 2023-2056.

(3)    Maturity dates are 2023-2072.

Schedule of Securities Sold

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)
	Years ended December 31,
	2022		2021		2020
Proceeds from sales	$	639	$	961	$	1,439
Gross realized gains	18		67		156
Gross realized losses	(20)		(5)		(17)