Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 279	$ 35	$ 340	$ 96
Other comprehensive income (loss):
Foreign currency translation gain (loss), net of income taxes	(3)	(3)	(3)	0
Net unrecognized gain (loss) on postretirement obligations, net of income taxes	0	(2)	1	7
Gain from pension settlements	0	0	3	0
Other comprehensive income (loss), net of income tax	(3)	(5)	1	7
Total comprehensive income	$ 276	$ 30	$ 341	$ 103