SAN ONOFRE NUCLEAR GENERATING STATION (Tables)

3 Months Ended

Mar. 31, 2021

Public Utilities, General Disclosures [Abstract]

Schedule of Nuclear Decommissioning Trusts Investments

The following table shows the fair values and gross unrealized gains and losses for the securities held in the NDT. 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
At March 31, 2021:
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies(1)	$	67	$	—	$	—	$	67
Municipal bonds(2)	310		15		(1)		324
Other securities(3)	256		10		(1)		265
Total debt securities	633		25		(2)		656
Equity securities	111		255		(2)		364
Cash and cash equivalents	8		—		—		8
(Payables) receivables, net	(15)		1		—		(14)
Total	$	737	$	281	$	(4)	$	1,014
At December 31, 2020:
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	$	64	$	1	$	—	$	65
Municipal bonds	308		18		—		326
Other securities	253		17		—		270
Total debt securities	625		36		—		661
Equity securities	112		254		(2)		364
Cash and cash equivalents	3		—		—		3
Payables, net	(9)		—		—		(9)
Total	$	731	$	290	$	(2)	$	1,019

(1)    Maturity dates are 2022-2051.

(2)    Maturity dates are 2021-2056.

(3)    Maturity dates are 2021-2072.

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 NDT
(Dollars in millions)
	Three months ended March 31,
	2021		2020
Proceeds from sales	$	288	$	552
Gross realized gains	21		92
Gross realized losses	(2)		(5)