Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,363	$ 1,810	$ 7,036	$ 5,138
Currency translation adjustments	2	44	(55)	121
Unrealized gain/(loss) on certain investments, net of tax of $0, $0, ($1) and $0			3
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized (loss)/gain arising during period, net of tax of $1, ($22), $27 and ($61)	(4)	40	(97)	111
Reclassification adjustment for losses included in net earnings, net of tax of ($3), ($5), ($5) and ($24)	9	10	19	44
Total unrealized (loss)/gain on derivative instruments, net of tax	5	50	(78)	155
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service credits included in net periodic pension cost, net of tax of $10, $16, $30 and $47	(35)	(27)	(106)	(84)
Net actuarial gain arising during the period, net of tax of $0, $0, $0 and $(1)			1	3
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($60), ($72), ($182) and ($217)	219	131	657	394
Settlements and curtailments included in net income, net of tax of $0, $0, ($3) and $0			6
Pension and postretirement cost related to our equity method investments, net of tax of $0, $0, $1 and $1	(1)		(4)	(2)
Total defined benefit pension plans and other postretirement benefits, net of tax	183	104	554	311
Other comprehensive income, net of tax	190	198	424	587
Comprehensive income related to noncontrolling interests	(2)		(12)	(1)
Comprehensive income, net of tax	$ 2,551	$ 2,008	$ 7,448	$ 5,724