Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Net earnings	$ 1,106	$ 923
Currency translation adjustments	(23)	45
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized (loss)/gain arising during period, net of tax of $15 and ($11)	(26)	18
Reclassification adjustment for loss included in net earnings, net of tax of ($1) and $0	2
Total unrealized gain/(loss) on derivative instruments, net of tax	(24)	18
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service cost included in net periodic pension cost, net of tax of ($1) and ($3)	3	4
Net actuarial gain arising during the period, net of tax of ($16) and ($9)	30	16
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($215) and ($188)	378	326
Settlements and curtailments included in net income, net of tax of ($5) and ($2)	9	3
Pension and post retirement benefits related to our equity method investments, net of tax ($1) and $4	2	(6)
Total defined benefit pension plans & other postretirement benefits, net of tax	422	343
Other comprehensive loss, net of tax	375	406
Comprehensive income/(loss) related to non-controlling interest	2
Comprehensive income, net of tax	$ 1,483	$ 1,329