Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net earnings	$ 8,197	$ 4,895	$ 5,176
Currency translation adjustments	128	(104)	(92)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax of ($1), $1, and ($5)	1	(2)	8
Unrealized gain/(loss) on derivative instruments:
Unrealized gain/(loss) arising during period, net of tax of ($66), $4 and $77	119	(8)	(140)
Reclassification adjustment for loss included in net earnings, net of tax of ($28), ($43) and ($43)	52	78	79
Total unrealized gain/(loss) on derivative instruments, net of tax	171	70	(61)
Defined benefit pension plans & other postretirement benefits:
Net actuarial loss arising during the period, net of tax of $248, $752 and $402	(495)	(1,365)	(732)
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($272), ($288) and ($570)	542	524	1,038
Settlements and curtailments included in net income, net of tax of $0, ($7) and ($27)		14	51
Pension and postretirement (cost)/benefit related to our equity method investments, net of tax $5, ($7) and ($2)	(11)	12	3
Amortization of prior service (credits)/cost included in net periodic pension cost, net of tax of $59, $31 and ($22)	(117)	(57)	38
Prior service cost arising during the period, net of tax of ($14), ($18) and ($496)	28	33	902
Total defined benefit pension plans & other postretirement benefits, net of tax	(53)	(839)	1,300
Other comprehensive income/(loss), net of tax	247	(875)	1,155
Comprehensive loss related to noncontrolling interests	(2)	(1)	(3)
Comprehensive income, net of tax	$ 8,442	$ 4,019	$ 6,328