Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 297	$ 417
Other comprehensive loss, net of tax
Change in actuarial gain and other for postretirement and postemployment plans	(4)	(5)
Change in derivative hedges unrecognized gain	2	(2)
Other comprehensive loss	(2)	(7)
Comprehensive income	$ 295	$ 410