Nuclear Decommissioning Trust Fund (Tables)

12 Months Ended

Dec. 31, 2022

Summary of Aggregate Fair Values and Unrealized Gains And Losses (Including Other-Than-Temporary Impairments) for the Securities Held in The Nuclear Decommissioning Trust Fund

The following table summarizes the aggregate fair values and unrealized gains and losses for the securities held in the trust funds, as well as information about the contractual maturities of those securities.


	As of December 31, 2022							As of December 31, 2021
(In millions, except otherwise noted)	Fair Value		Unrealized Gains		Unrealized Losses		Weighted- average maturities (in years)	Fair Value		Unrealized Gains		Unrealized Losses		Weighted- average maturities (in years)
Cash and cash equivalents	$	15	$	—	$	—	—	$	33	$	—	$	—	—
U.S. government and federal agency obligations	86		—		5		11	112		5		1		10
Federal agency mortgage-backed securities	101		—		11		26	100		2		—		25
Commercial mortgage-backed securities	35		—		4		30	44		1		—		27
Corporate debt securities	114		—		13		12	122		7		1		14
Equity securities	486		346		3		—	593		456		—		—
Foreign government fixed income securities	1		—		—		17	4		—		—		13
Total	$	838	$	346	$	36		$	1,008	$	471	$	2

Summary of Proceeds From Sales of Available-For-Sale securities and the related realized gains and losses

The following table summarizes proceeds from sales of available-for-sale securities and the related realized gains and losses from these sales. The cost of securities sold is determined using the specific identification method.


	Year Ended December 31,
(In millions)	2022		2021		2020
Realized gains	$	14	$	47	$	34
Realized losses	(25)		(9)		(13)
Proceeds from sale of securities	448		710		439