Equity Activity (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other comprehensive income/(loss), before tax:
Foreign currency translation adjustments, before tax	$ (1,015)	$ (1,126)	$ (1,365)	$ (848)
Net changes related to available-for-sale securities, before tax:
Unrealized gains/(losses) arising during the period, before tax	(102)	0	(85)	1
Reclassification of (gains)/losses to other (income) and expense, before tax	0	0	0	5
Total net changes related to available-for-sale securities	(101)	0	(85)	6
Unrealized gains/(losses) on cash flow hedges, before tax:
Unrealized gains/(losses) arising during the period, before tax	36	524	467	596
Reclassification of (gains)/losses to net income, before tax	(273)	58	(843)	91
Total unrealized gains/(losses) on cash flow hedges	(237)	582	(376)	687
Retirement-related benefit plans, before tax:
Prior service costs/(credits), before tax	0	0	6	1
Net (losses)/gains arising during the period, before tax	(2)	1	14	48
Curtailments and settlements, before taxes	11	7	19	20
Amortization of prior service (credits)/costs, before tax	(25)	(29)	(76)	(88)
Amortization of net (gains)/losses, before tax	823	635	2,479	1,923
Total retirement-related benefit plans	807	615	2,441	1,905
Other comprehensive income/(loss), before tax	(547)	71	616	1,749
Other comprehensive income/(loss), tax:
Foreign currency translation adjustments, tax	(28)	(271)	(227)	(241)
Net changes related to available-for-sale securities, tax:
Unrealized gains/(losses) arising during the period, tax	39	0	33	0
Total net changes related to available-for-sale securities, tax	39	0	33	(2)
Unrealized gains/(losses) on cash flow hedges, tax:
Unrealized gains/(losses) arising during the period, tax	(9)	(182)	(166)	(213)
Total unrealized gains/(losses) on cash flow hedges, tax	88	(204)	132	(244)
Retirement-related benefit plans, tax:
Prior service costs/(credits), tax	0	0	(2)	0
Net (losses)/gains arising during the period, tax	1	0	(5)	(16)
Curtailments and settlements, tax	(4)	(2)	(6)	(7)
Amortization of prior service (credits)/costs, tax	8	10	26	29
Amortization of net (gains)/losses, tax	(281)	(212)	(846)	(644)
Total retirement-related benefit plans, tax	(275)	(205)	(833)	(638)
Other comprehensive income/(loss), tax	(176)	(680)	(895)	(1,126)
Other comprehensive income/(loss), net of tax:
Foreign currency translation adjustments, net of tax	(1,043)	(1,397)	(1,593)	(1,090)
Net changes related to available-for-sale securities, net of tax:
Unrealized gains/(losses) arising during the period, net of tax	(63)	0	(52)	1
Reclassification of (gains)/losses to other (income) and expense, net of tax	0	0	0	3
Total net changes related to available-for-sale securities, net of tax	(62)	0	(52)	4
Unrealized gains/(losses) on cash flow hedges, net of tax:
Unrealized gains/(losses) arising during the period, net of tax	27	342	301	383
Total unrealized gains/(losses) on cash flow hedges, net of tax	(149)	378	(243)	443
Retirement-related benefit plans, net of tax:
Prior service costs/(credits), net of tax	0	0	4	0
Net (losses)/gains arising during the period, net of tax	(1)	1	9	32
Curtailments and settlements, net of tax	7	5	12	14
Amortization of prior service (credits)/costs, net of tax	(16)	(19)	(50)	(58)
Amortization of net (gains)/losses, net of tax	542	423	1,633	1,279
Total retirement-related benefit plans, net of tax	531	409	1,608	1,266
Other comprehensive income/(loss)	(724)	(609)	(280)	623
Cost of sales
Unrealized gains/(losses) on cash flow hedges, before tax:
Reclassification of (gains)/losses to net income, before tax	(46)	4	(154)	53
Unrealized gains/(losses) on cash flow hedges, tax:
Reclassification of (gains)/losses to net income, tax	13	(1)	46	(18)
Unrealized gains/(losses) on cash flow hedges, net of tax:
Reclassification of (gains)/losses to net income, net of tax	(33)	3	(109)	35
SG&A expense
Unrealized gains/(losses) on cash flow hedges, before tax:
Reclassification of (gains)/losses to net income, before tax	(43)	(3)	(124)	5
Unrealized gains/(losses) on cash flow hedges, tax:
Reclassification of (gains)/losses to net income, tax	13	1	36	0
Unrealized gains/(losses) on cash flow hedges, net of tax:
Reclassification of (gains)/losses to net income, net of tax	(30)	(2)	(88)	5
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	0	0	5
Unrealized gains/(losses) on cash flow hedges, before tax:
Reclassification of (gains)/losses to net income, before tax	(185)	57	(565)	33
Net changes related to available-for-sale securities, tax:
Reclassification of (gains)/losses to other (income) and expense, tax	0	0	0	(2)
Unrealized gains/(losses) on cash flow hedges, tax:
Reclassification of (gains)/losses to net income, tax	71	(22)	217	(13)
Net changes related to available-for-sale securities, net of tax:
Reclassification of (gains)/losses to other (income) and expense, net of tax	0	0	0	3
Unrealized gains/(losses) on cash flow hedges, net of tax:
Reclassification of (gains)/losses to net income, net of tax	(114)	35	(348)	20
Interest expense
Unrealized gains/(losses) on cash flow hedges, before tax:
Reclassification of (gains)/losses to net income, before tax	0	1	0	1
Unrealized gains/(losses) on cash flow hedges, tax:
Reclassification of (gains)/losses to net income, 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	$ 0	$ 1	$ 0	$ 1