Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,158	$ 1,032	$ 3,352	$ 2,922
Currency translation adjustments	42	36	(46)	26
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized loss/(gain) arising during period, net of tax of ($20), ($21), $31 and ($14)	35	37	(54)	25
Reclassification adjustment for (gain)/loss included in net earnings, net of tax of $5, $0, $8 and ($5)	(10)		(13)	8
Total unrealized (loss)/gain on derivative instruments, net of tax	25	37	(67)	33
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service cost included in net periodic pension cost, net of tax of ($3), ($3), ($6) and ($9)	4	4	9	12
Net actuarial gain arising during the period, net of tax of ($56), ($5), ($72) and ($29)	101	9	131	52
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($213), ($188), ($644) and ($563)	380	326	1,135	979
Settlements and curtailments included in net income, net of tax of ($30), $0, ($35) and ($3)	54		63	5
Pension and post retirement benefits related to our equity method investments, net of tax ($1), ($81), ($2) and ($75)	1	143	4	132
Total defined benefit pension plans & other postretirement benefits, net of tax	540	482	1,342	1,180
Other comprehensive income, net of tax	607	555	1,229	1,239
Comprehensive income/(loss) related to non-controlling interest	(18)	3	3	4
Comprehensive income, net of tax	$ 1,747	$ 1,590	$ 4,584	$ 4,165