SAN ONOFRE NUCLEAR GENERATING STATION (Tables)

9 Months Ended

Sep. 30, 2020

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 September 30, 2020:
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies(1)	$	48	$	1	$	—	$	49
Municipal bonds(2)	318		18		(1)		335
Other securities(3)	258		14		(1)		271
Total debt securities	624		33		(2)		655
Equity securities	147		254		(12)		389
Cash and cash equivalents	13		—		—		13
Total	$	784	$	287	$	(14)	$	1,057
At December 31, 2019:
Debt securities:
Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies	$	57	$	—	$	—	$	57
Municipal bonds	270		12		—		282
Other securities	218		9		(1)		226
Total debt securities	545		21		(1)		565
Equity securities	176		339		(6)		509
Cash and cash equivalents	8		—		—		8
Total	$	729	$	360	$	(7)	$	1,082

(1)    Maturity dates are 2022-2050.

(2)    Maturity dates are 2020-2056.

(3)    Maturity dates are 2020-2072.

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 September 30,				Nine months ended September 30,
	2020		2019		2020		2019
Proceeds from sales	$	294	$	231	$	1,091	$	728
Gross realized gains	9		5		108		18
Gross realized losses	(2)		(1)		(13)		(4)