CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 151	$ 771
Other comprehensive income:
Foreign currency translation adjustments	0	16
Changes in unamortized actuarial loss, net of tax expense of $2 and $5	7	13
Changes in unamortized net prior service credit, net of tax expense of $0 and $1	0	0
Total other comprehensive income	7	29
Total comprehensive income	$ 158	$ 800