Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,304	$ 97
Other comprehensive income (loss), net of tax
Change in actuarial gain (loss) and other for postretirement and postemployment plans	(4)	(3)
Change in derivative hedges unrecognized gain (loss)	12	44
Reclassification of de-designated forward interest rate swaps	0	(2)
Other comprehensive income	8	39
Comprehensive income	$ 1,312	$ 136