CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings	$ 28	$ 239	$ 315	$ 620
Other comprehensive income:
Foreign currency translation adjustments	6	(7)	(8)	0
Changes in unamortized actuarial loss, net of tax expense of $3, $3, $9 and $7	6	9	21	23
Changes in unamortized net prior service credit, net of tax benefit of $0, $0, $0 and $1	1	0	1	1
Total other comprehensive income	13	2	14	24
Total comprehensive income	$ 41	$ 241	$ 329	$ 644