Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 287	$ 966	$ 704	$ 2,270
Other comprehensive income (loss), net of tax
Change in actuarial gain (loss) and other for postretirement and postemployment plans	(8)	1	(13)	(3)
Change in derivative hedges unrecognized gain	3	4	1	16
Other	0	(1)	0	(1)
Other comprehensive income (loss)	(5)	4	(12)	12
Comprehensive income	$ 282	$ 970	$ 692	$ 2,282