CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income		$ 1,625	$ 4,065	$ 1,158
Postretirement benefits:
Amortization of net actuarial gain	[1]	(2)	0	0
Net actuarial gain	[2]	0	12	0
Amortization of prior service credit	[3]	0	(1)	(1)
Plan amendment	[4]	0	1	0
Total other comprehensive (loss) income		(2)	12	(1)
Comprehensive income		$ 1,623	$ 4,077	$ 1,157

[1] Net of income taxes of less than $1 million for the year ended December 31, 2023.

[2] Net of income taxes of $3 million for the year ended December 31, 2022 .

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

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