CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 788	$ 1,028	$ 1,559	$ 1,709
Other comprehensive income (loss):
Foreign currency translation adjustments	(25)	15	(9)	24
Changes in unamortized actuarial loss, net of tax expense of $24, $38, $29 and $45	77	121	90	141
Changes in unamortized net prior service credit, net of tax expense of $0, $1, $1 and $0	0	0	0	1
Total other comprehensive income	52	136	81	166
Total comprehensive income	$ 840	$ 1,164	$ 1,640	$ 1,875