Equity Activity: (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Other comprehensive income/(loss), before tax
Foreign currency translation adjustments, before tax	$ (936)		$ (724)		$ (1,341)		$ (337)
Net changes related to available-for-sale securities, before tax
Unrealized gains/(losses) arising during the period, before tax	0		(3)		(2)		3
Reclassification of (gains)/losses to net income, before tax	0		(2)		0		(16)
Subsequent changes in previously impaired securities arising during the period, before tax	0		9		1		27
Total net changes related to available-for-sale securities	0		4		(1)		14
Unrealized gains/(losses) on cash flow hedges, before tax
Unrealized gains/(losses) arising during the period, before tax	(10)		68		350		119
Reclassification of (gains)/losses to net income, before tax	(47)		(111)		(103)		(135)
Total unrealized gains/(losses) on cash flow hedges	(57)		(42)	[1]	247		(16)
Retirement-related benefit plans, before tax
Prior service costs/(credits), before tax	0		0		33		0
Net (losses)/gains arising during the period, before tax	210		70		195		65
Curtailments and settlements, before tax	0		0		0		0
Amortization of prior service (credits)/costs, before tax	(28)		(37)		(58)		(74)
Amortization of net (gains)/losses, before tax	864		613		1,750		1,232
Total retirement-related benefit plans	1,045	[1]	647	[1]	1,920		1,223
Other comprehensive income/(loss), before tax	53	[1]	(115)		826	[1]	884
Other comprehensive income/(loss), tax
Foreign currency translation adjustments, tax	(23)		(58)		(107)		(48)
Net changes related to available-for-sale securities, tax
Unrealized gains/(losses) arising during the period, tax	0		1		1		(1)
Subsequent changes in previously impaired securities arising during the period, tax	0		(3)		0		(10)
Total net changes related to available-for-sale securities, tax	0		(1)		1		(5)
Unrealized gains/(losses) on cash flow hedges, tax
Unrealized gains/(losses) arising during the period, tax	9		(15)		(119)		(45)
Total unrealized gains/(losses) on cash flow hedges, tax	28		21		(79)		(1)
Retirement-related benefit plans, tax
Prior service costs/(credits), tax	0		0		(11)		0
Net (losses)/gains arising during the period, tax	(71)		(26)		(67)		(23)
Curtailments and settlements, tax			0				0
Amortization of prior service (credits)/costs, tax	10		13		20		27
Amortization of net (gains)/losses, tax	(304)		(217)		(597)		(446)
Total retirement-related benefit plans, tax	(366)		(229)		(655)		(443)
Other comprehensive income/(loss), tax	(361)		(268)		(842)		(497)
Other comprehensive income/(loss), net of tax
Foreign currency translation adjustments, net of tax	(959)		(782)		(1,448)		(385)
Net changes related to available-for-sale securities, net of tax
Unrealized gains/(losses) arising during the period, net of tax	0		(2)		(2)		2
Reclassification of (gains)/losses to net income, net of tax	0		(1)		0		(10)
Subsequent changes in previously impaired securities arising during the period, net of tax	0		6		1		17
Total net changes related to available-for-sale securities, net of tax	0		2		0		9
Unrealized gains/(losses) on cash flow hedges, net of tax
Unrealized gains/(losses) arising during the period, net of tax	(1)		53		231		74
Total unrealized gains/(losses) on cash flow hedges, net of tax	(29)		(21)		168		(17)
Retirement-related benefit plans, net of tax
Prior service costs/(credits), net of tax	0		0		21		0
Net (losses)/gains arising during the period, net of tax	138		45		129		41
Curtailments and settlements, net of tax			0				0
Amortization of prior service (credits)/costs, net of tax	(18)		(24)		(38)		(47)
Amortization of net (gains)/losses, net of tax	559		397		1,153		786
Total retirement-related benefit plans, net of tax	679		418		1,265		780
Other comprehensive income/(loss)	(309)	[1]	(383)		(16)		387
Cost of sales
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	7		(12)		(3)		(16)
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to net income, tax	(2)		0		1		0
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	4		(11)		(2)		(16)
SG&A expense
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	(5)		(15)		(15)		(16)
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to net income, tax	2		4		6		4
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	(3)		(11)		(10)		(12)
Other (income) and expense
Net changes related to available-for-sale securities, before tax
Reclassification of (gains)/losses to net income, before tax	0		(2)		0		(16)
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	(48)		(86)		(85)		(106)
Net changes related to available-for-sale securities, tax
Reclassification of (gains)/losses to net income, tax	0		1		0		6
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to net income, tax	19		33		33		41
Net changes related to available-for-sale securities, net of tax
Reclassification of (gains)/losses to net income, net of tax	0		(1)		0		(10)
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	(30)		(53)		(52)		(65)
Interest expense
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	0		2		0		4
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to net income, tax	0		(1)		0		(2)
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	$ 0		$ 1		$ 0		$ 2

[1] Amounts may not add due to rounding.