Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,196	$ 1,749	$ 4,673	$ 3,328
Currency translation adjustments	(84)	43	(57)	77
Unrealized gain/(loss) on certain investments, net of tax of ($1), $1, ($1) and $0	1	(1)	3
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized (loss)/gain arising during period, net of tax of $26, ($11), $26 and ($39)	(91)	19	(93)	71
Reclassification adjustment for losses included in net earnings, net of tax of ($1), ($10), ($2) and ($19)	6	18	10	34
Total unrealized gain on derivative instruments, net of tax	(85)	37	(83)	105
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service credits included in net periodic pension cost, net of tax of $10, $15, $20 and $31	(35)	(29)	(71)	(57)
Net actuarial gain arising during the period, net of tax of $0, $0, $0 and $(1)	1		1	3
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($62), ($73), ($122) and ($145)	219	131	438	263
Settlements and curtailments included in net income, net of tax of ($3), $0, ($3) and $0	(6)		(6)
Pension and postretirement cost related to our equity method investments, net of tax of $0, $0, $1 and $1			(3)	(2)
Total defined benefit pension plans and other postretirement benefits, net of tax	191	102	371	207
Other comprehensive income, net of tax	23	181	234	389
Comprehensive income related to noncontrolling interests	(9)	(1)	(10)	(1)
Comprehensive income, net of tax	$ 2,210	$ 1,929	$ 4,897	$ 3,716