CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net earnings	$ 255	$ 130	$ 841	$ 311
Other comprehensive income (loss):
Foreign currency translation adjustments	15	24	(16)	35
Changes in unamortized actuarial loss, net of tax of $12, $12, $94, and $62	38	18	291	90
Changes in unamortized net prior service credit, net of tax of $0, $0, $1, and $1	(2)	(1)	(3)	(5)
Unrealized gains on available-for-sale securities	0	1	0	2
Total other comprehensive income	51	42	272	122
Total comprehensive income	$ 306	$ 172	$ 1,113	$ 433