Equity Activity: (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Other comprehensive income/(loss), before tax
Foreign currency translation adjustments, before tax	$ (1,126)		$ 382		$ (848)		$ (959)
Net changes related to available-for-sale securities, before tax
Unrealized gains/(losses) arising during the period, before tax	0		3		1		0
Reclassification of (gains)/losses to other (income) and expense, before tax	0		(5)		5		(5)
Subsequent changes in previously impaired securities arising during the period, before tax			1				3
Total net changes related to available-for-sale securities	0		(1)		6		(1)
Unrealized gains/(losses) on cash flow hedges, before tax
Unrealized gains/(losses) arising during the period, before tax	524		(409)		596		(58)
Reclassification of (gains)/losses to net income, before tax	58		(27)		91		(130)
Total unrealized gains/(losses) on cash flow hedges	582		(436)		687		(188)
Retirement-related benefit plans, before tax
Prior service costs/(credits), before tax	0		0		1		33
Net (losses)/gains arising during the period, before tax	1		105		48		300
Curtailments and settlements	7		0		20		0
Amortization of prior service (credits)/costs, before tax	(29)		(28)		(88)		(86)
Amortization of net (gains)/losses, before tax	635		872		1,923		2,623
Total retirement-related benefit plans	615		949		1,905		2,869
Other comprehensive income/(loss), before tax	71		895		1,749		1,721
Other comprehensive income/(loss), tax
Foreign currency translation adjustments, tax	(271)		86		(241)		(21)
Net changes related to available-for-sale securities, tax
Unrealized gains/(losses) arising during the period, tax	0		(1)		0		(1)
Subsequent changes in previously impaired securities arising during the period, tax			0				(1)
Total net changes related to available-for-sale securities, tax	0		0		(2)		0
Unrealized gains/(losses) on cash flow hedges, tax
Unrealized gains/(losses) arising during the period, tax	(182)		144		(213)		25
Total unrealized gains/(losses) on cash flow hedges, tax	(204)		153		(244)		74
Retirement-related benefit plans, tax
Prior service costs/(credits), tax	0	[1]	0	[1]	0	[1]	(11)	[1]
Net (losses)/gains arising during the period, tax	0	[1]	(36)	[1]	(16)	[1]	(103)	[1]
Curtailments and settlements, tax	(2)	[1]	0	[1]	(7)	[1]	0	[1]
Amortization of prior service (credits)/costs, tax	10	[1]	10	[1]	29	[1]	30	[1]
Amortization of net (gains)/losses, tax	(212)	[1]	(304)	[1]	(644)	[1]	(901)	[1]
Total retirement-related benefit plans, tax	(205)	[1]	(331)	[1]	(638)	[1]	(986)	[1]
Other comprehensive income/(loss), tax	(680)		(91)		(1,126)		(933)
Other comprehensive income/(loss), net of tax
Foreign currency translation adjustments, net of tax	(1,397)		468		(1,090)		(980)
Net changes related to available-for-sale securities, net of tax
Unrealized gains/(losses) arising during the period, net of tax	0		1		1		0
Reclassification of (gains)/losses to other (income) and expense, net of tax	0	[2]	(3)	[2]	3	[2]	(3)	[2]
Subsequent changes in previously impaired securities arising during the period, net of tax			1				2
Total net changes related to available-for-sale securities, net of tax	0		(1)		4		(1)
Unrealized gains/(losses) on cash flow hedges, net of tax
Unrealized gains/(losses) arising during the period, net of tax	342		(265)		383		(33)
Total unrealized gains/(losses) on cash flow hedges, net of tax	378		(282)		443		(114)
Retirement-related benefit plans, net of tax
Prior service costs/(credits), net of tax	0	[1]	0	[1]	0	[1]	21	[1]
Net (losses)/gains arising during the period, net of tax	1	[1]	68	[1]	32	[1]	197	[1]
Curtailments and settlements, net of tax	5	[1]	0	[1]	14	[1]	0	[1]
Amortization of prior service (credits)/costs, net of tax	(19)	[1]	(18)	[1]	(58)	[1]	(57)	[1]
Amortization of net (gains)/losses, net of tax	423	[1]	568	[1]	1,279	[1]	1,721	[1]
Total retirement-related benefit plans, net of tax	409	[1]	618	[1]	1,266	[1]	1,883	[1]
Other comprehensive income/(loss)	(609)		804		623		788
Cost of sales
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	4		17		53		15
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to other (income) and expense, tax	(1)		(7)		(18)		(6)
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	3		10		35		9
SG&A expense
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	(3)		(13)		5		(29)
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to other (income) and expense, tax	1		5		0		10
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	(2)		(9)		5		(18)
Other (income) and expense
Net changes related to available-for-sale securities, before tax
Reclassification of (gains)/losses to other (income) and expense, before tax	0		(5)		5		(5)
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	57		(30)		33		(115)
Net changes related to available-for-sale securities, tax
Reclassification of (gains)/losses to other (income) and expense, tax	0		2		(2)		2
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to other (income) and expense, tax	(22)		12		(13)		45
Net changes related to available-for-sale securities, net of tax
Reclassification of (gains)/losses to other (income) and expense, net of tax	0		(3)		3		(3)
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	35		(19)		20		(71)
Interest expense
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	1		0		1		0
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to other (income) and expense, tax	0		0		0		0
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	$ 1		$ 0		$ 1		$ 0

[1] These AOCI components are included in the computation of net periodic pension cost. (See note 8, "Retirement-Related Benefits," for additional information.)

[2] There were no writedowns for the nine months ended September 30, 2014 and 2013, respectively.