Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 453	$ 817	$ 1,157	$ 3,087
Other comprehensive income (loss), net of tax
Change in actuarial gain (loss) and other for postretirement and postemployment plans	(4)	(3)	(17)	(6)
Change in derivative hedges unrecognized gain	0	7	1	23
Other	0	0	0	(1)
Other comprehensive income (loss)	(4)	4	(16)	16
Comprehensive income	$ 449	$ 821	$ 1,141	$ 3,103