CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 771	$ 681
Other comprehensive income (loss):
Foreign currency translation adjustments	16	9
Changes in unamortized actuarial loss, net of tax expense of $5 and $7	13	20
Changes in unamortized net prior service credit, net of tax (expense) benefit of ($1) and $1	0	1
Total other comprehensive income	29	30
Total comprehensive income	$ 800	$ 711