Equity Activity: (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Other comprehensive income/(loss), before tax
Foreign currency translation adjustments, before tax	$ (61)		$ (405)
Net changes related to available-for-sale securities, before tax
Unrealized gains/(losses) arising during the period, before tax	0		(3)
Reclassification of (gains)/losses to other (income) and expense, before tax	4		1
Subsequent changes in previously impaired securities arising during the period, before tax			1
Total net changes related to available-for-sale securities	4		(1)
Unrealized gains/(losses) on cash flow hedges, before tax
Unrealized gains/(losses) arising during the period, before tax	88		360
Reclassification of (gains)/losses to net income, before tax	(1)		(56)
Total unrealized gains/(losses) on cash flow hedges	87		305
Retirement-related benefit plans, before tax
Prior service costs/(credits), before tax	1		33
Net (losses)/gains arising during the period, before tax	32		(15)
Curtailments and settlements	4
Amortization of prior service (credits)/costs, before tax	(29)		(30)
Amortization of net (gains)/losses, before tax	649		886
Total retirement-related benefit plans	656		875
Other comprehensive income/(loss), before tax	687		773
Other comprehensive income/(loss), tax
Foreign currency translation adjustments, tax	10		(84)
Net changes related to available-for-sale securities, tax
Unrealized gains/(losses) arising during the period, tax	0		1
Reclassification of (gains)/losses to other (income) and expense, tax	(2)		0
Subsequent changes in previously impaired securities arising during the period, tax			0
Total net changes related to available-for-sale securities, tax	(2)		0
Unrealized gains/(losses) on cash flow hedges, tax
Unrealized gains/(losses) arising during the period, tax	(33)		(128)
Total unrealized gains/(losses) on cash flow hedges, tax	(32)		(108)
Retirement-related benefit plans, tax
Prior service costs/(credits), tax	0	[1]	(11)	[1]
Net (losses)/gains arising during the period, tax	(11)	[1]	5	[1]
Curtailments and settlements, tax	(1)	[1]
Amortization of prior service (credits)/costs, tax	10	[1]	10	[1]
Amortization of net (gains)/losses, tax	(214)	[1]	(293)	[1]
Total retirement-related benefit plans, tax	(217)	[1]	(289)	[1]
Other comprehensive income/(loss), tax	(241)		(480)
Other comprehensive income/(loss), net of tax
Foreign currency translation adjustments, net of tax	(51)		(489)
Net changes related to available-for-sale securities, net of tax
Unrealized gains/(losses) arising during the period, net of tax	0		(2)
Reclassification of (gains)/losses to other (income) and expense, net of tax	3	[2]	0	[2]
Subsequent changes in previously impaired securities arising during the period, net of tax			1
Total net changes related to available-for-sale securities, net of tax	3		0
Unrealized gains/(losses) on cash flow hedges, net of tax
Unrealized gains/(losses) arising during the period, net of tax	54		232
Total unrealized gains/(losses) on cash flow hedges, net of tax	55		197
Retirement-related benefit plans, net of tax
Prior service costs/(credits), net of tax	0	[1]	22	[1]
Net (losses)/gains arising during the period, net of tax	21	[1]	(10)	[1]
Curtailments and settlements, net of tax	3	[1]
Amortization of prior service (credits)/costs, net of tax	(20)	[1]	(20)	[1]
Amortization of net (gains)/losses, net of tax	434	[1]	594	[1]
Total retirement-related benefit plans, net of tax	439	[1]	586	[1]
Other comprehensive income/(loss)	446		293
Cost of sales
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	26		(9)
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to other (income) and expense, tax	(10)		3
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	16		(6)
SG&A expense
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	2		(10)
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to other (income) and expense, tax	0		3
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	2		(7)
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	4		1
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	(29)		(37)
Net changes related to available-for-sale securities, tax
Reclassification of (gains)/losses to other (income) and expense, tax	(2)		0
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to other (income) and expense, tax	11		14
Net changes related to available-for-sale securities, net of tax
Reclassification of (gains)/losses to other (income) and expense, net of tax	3		0
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	(18)		(23)
Interest expense
Unrealized gains/(losses) on cash flow hedges, before tax
Reclassification of (gains)/losses to net income, before tax	0		0
Unrealized gains/(losses) on cash flow hedges, tax
Reclassification of (gains)/losses to other (income) and expense, tax	0
Unrealized gains/(losses) on cash flow hedges, net of tax
Reclassification of (gains)/losses to net income, net of tax	$ 0		$ 0

[1] (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 three months ended March 31, 2014 and 2013.