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 earnings	$ 35	$ 25	$ 47	$ 61
Other comprehensive income (loss):
Foreign currency translation gain, net of income taxes	1	(1)	1	0
Gain from pension settlements	0	0	0	3
Net unrecognized gain (loss) on postretirement obligations, net of income taxes	1	(1)	1	1
Other comprehensive income (loss), net of income tax	2	(2)	2	4
Total comprehensive income	$ 37	$ 23	$ 49	$ 65