Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,219	$ 1,336
Currency translation adjustments	23	(88)
Unrealized (loss)/gain on certain investments, net of tax of $1 and ($1)	(2)	1
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized gain/(loss) arising during period, net of tax of ($32) and $51	58	(91)
Reclassification adjustment for gains included in net earnings, net of tax of ($12) and ($6)	23	12
Total unrealized gain/(loss) on derivative instruments, net of tax	81	(79)
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service (benefit)/cost included in net periodic pension cost, net of tax of $7 and ($5)	(14)	$ 10
Net actuarial loss arising during the period, net of tax of $181 and $0	(328)
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($72) and ($137)	131	$ 244
Settlements and curtailments included in net income, net of tax of ($6) and $0	11
Pension and postretirement benefits related to equity method investments, net of tax of ($4) and $0	8
Total defined benefit pension plans and other postretirement benefits, net of tax	(192)	$ 254
Other comprehensive (loss)/income, net of tax	(90)	88
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	1	(1)
Comprehensive income, net of tax	$ 1,130	$ 1,423