Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,336	$ 965
Currency translation adjustments	(88)	17
Unrealized gain on certain investments, net of tax ($1) and ($1)	1	2
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized (loss) arising during period, net of tax of $51 and $6	(91)	(11)
Reclassification adjustment for gains included in net earnings, net of tax of ($6) and ($3)	12	5
Total unrealized (loss) on derivative instruments, net of tax	(79)	(6)
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service cost included in net periodic pension cost, net of tax of ($5) and ($3)	10	6
Net actuarial gain arising during the period, net of tax of $0 and ($346)		620
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($137) and ($94)	244	169
Settlements and curtailments included in net income, net of tax of $0 and ($113)		203
Total defined benefit pension plans and other postretirement benefits, net of tax	254	998
Other comprehensive income, net of tax	88	1,011
Comprehensive (loss)/income related to noncontrolling interests	(1)	3
Comprehensive income, net of tax	$ 1,423	$ 1,979