Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net earnings	$ 12	$ 36
Other comprehensive income (loss):
Foreign currency translation gain, net of income taxes	0	1
Gain from pension settlements	0	3
Net unrecognized gain (loss) on postretirement obligations, net of income taxes	0	2
Other comprehensive income (loss), net of income tax	0	6
Total comprehensive income	$ 12	$ 42