Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,451	$ 1,219
Currency translation adjustments	34	23
Unrealized gain/(loss) on certain investments, net of tax of ($1) and $1	1	(2)
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized gain arising during period, net of tax of ($28) and ($32)	52	58
Reclassification adjustment for losses included in net earnings, net of tax of ($9) and ($12)	16	23
Total unrealized gain on derivative instruments, net of tax	68	81
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service credits included in net periodic pension cost, net of tax of $16 and $7	(28)	(14)
Net actuarial gain/(loss) arising during the period, net of tax of ($1) and $181	3	(328)
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($72) and ($72)	(132)	(131)
Settlements and curtailments included in net income, net of tax of $0 and ($6)		(11)
Pension and postretirement (cost)/benefit related to our equity method investments, net of tax of $1 and ($4)	(2)	8
Total defined benefit pension plans and other postretirement benefits, net of tax	105	(192)
Other comprehensive income/(loss), net of tax	208	(90)
Comprehensive income related to noncontrolling interests		1
Comprehensive income, net of tax	$ 1,659	$ 1,130