CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 310	$ 482	$ 1,869	$ 2,191
Other comprehensive income (loss):
Foreign currency translation adjustments	(53)	(25)	(62)	(1)
Changes in unamortized actuarial loss, net of tax expense of $11, $10, $40 and $55	32	29	122	170
Changes in unamortized net prior service credit, net of tax expense of $0, $0, $1 and $0	1	1	1	2
Total other comprehensive income (loss)	(20)	5	61	171
Total comprehensive income	$ 290	$ 487	$ 1,930	$ 2,362