CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net earnings	$ 230	$ 788	$ 381	$ 1,559
Other comprehensive income:
Foreign currency translation adjustments	7	(25)	7	(9)
Changes in unamortized actuarial loss, net of tax expense of $2, $24, $4 and $29	7	77	14	90
Changes in unamortized net prior service credit, net of tax (expense) benefit of $1, $0, $1 and ($1)	1	0	1	0
Total other comprehensive income	15	52	22	81
Total comprehensive income	$ 245	$ 840	$ 403	$ 1,640