CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Comprehensive income:
Net earnings	$ 748	$ 582	$ 1,027
Other comprehensive income (loss):
Foreign currency translation adjustments	(54)	32	25
Changes in unamortized actuarial loss, net of tax expense (benefit) of $235 in 2018, ($2) in 2017 and ($151) in 2016	733	(132)	(269)
Changes in unamortized net prior service credit, net of tax benefit of $3 in 2018, $2 in 2017 and $0 in 2016	(7)	(5)	(4)
Unrealized gains on available-for-sale securities	0	2	1
Total comprehensive income	$ 1,420	$ 479	$ 780

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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