CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income		$ 4,065	$ 1,158	$ 201
Postretirement benefits:
Net actuarial gain	[1]	12	0	1
Amortization of prior service credit	[2]	(1)	(1)	(1)
Plan amendment	[3]	1	0	0
Total other comprehensive income		12	(1)	0
Comprehensive income		$ 4,077	$ 1,157	$ 201

[1] Net of income taxes of $3 million for the year ended December 31, 2022 and less than $1 million for the years ended December 31, 2021 and 2020.

[2] Net of income taxes of less than $1 million for each of the years ended December 31, 2022, 2021 and 2020

[3] Net of income taxes of less than $1 million for the year ended December 31, 2022