Equity Activity - Reclassifications and Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Cost of sales	$ 10,536		$ 10,423	$ 20,535	$ 20,561
SG&A expense	5,349		5,179	11,361	10,541
Other (income) and expense	37		(301)	289	(444)
Interest expense	167		115	315	223
Provision for/(benefit from) income taxes	544	$ (983)	698	(439)	1,283
Net (income) loss	(2,504)		(3,449)	(4,518)	(5,777)
Other comprehensive income/(loss), Before Tax Amount	617		472	1,023	1,163
Other comprehensive income/(loss), Tax (Expense)/Benefit	(223)		(62)	(21)	(719)
Other comprehensive income/(loss)	394		411	1,002	444
Accumulated Other Comprehensive Income/(Loss)
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Unrealized gains/(losses) arising during the period, Net of Tax Amount				135	(246)
Reclassification/amortization, Net of Tax Amount				867	690
Other comprehensive income/(loss), Before Tax Amount	617		472	1,023	1,163
Other comprehensive income/(loss), Tax (Expense)/Benefit	(223)		(62)	(21)	(719)
Other comprehensive income/(loss)	394		411	1,002	444
Foreign Currency Translation Adjustments
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Unrealized gains/(losses) arising during the period, Net of Tax Amount				351	(549)
Reclassification/amortization, Net of Tax Amount				0	0
Other comprehensive income/(loss), Before Tax Amount	(248)		102	(10)	(350)
Other comprehensive income/(loss), Tax (Expense)/Benefit	95		67	361	(199)
Other comprehensive income/(loss)	(154)		169	351	(549)
Net Unrealized Gains/(Losses) on Available-For-Sale Securities
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Unrealized gains/(losses) arising during the period, Before Tax Amount	1		(15)	(35)	17
Unrealized gains/(losses) arising during the period, Tax (Expense)/Benefit	0		6	14	(6)
Unrealized gains/(losses) arising during the period, Net of Tax Amount	1		(10)	(22)	10
Reclassification/amortization, Net of Tax Amount				23	0
Other comprehensive income/(loss), Before Tax Amount	1		(15)	2	16
Other comprehensive income/(loss), Tax (Expense)/Benefit	0		6	(1)	(6)
Other comprehensive income/(loss)	1		(10)	1	10
Net Unrealized Gains/(Losses) on Available-For-Sale Securities | Reclassifications
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Other (income) and expense	0		0	37	0
Provision for/(benefit from) income taxes	0		0	(14)	0
Net (income) loss	0		0	23	0
Net Unrealized Gains/(Losses) on Cash Flow Hedges
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Unrealized gains/(losses) arising during the period, Before Tax Amount	9		(187)	(256)	432
Unrealized gains/(losses) arising during the period, Tax (Expense)/Benefit	5		60	96	(158)
Unrealized gains/(losses) arising during the period, Net of Tax Amount	13		(127)	(160)	274
Reclassification/amortization, Net of Tax Amount				4	(368)
Other comprehensive income/(loss), Before Tax Amount	111		(508)	(245)	(138)
Other comprehensive income/(loss), Tax (Expense)/Benefit	(34)		175	90	44
Other comprehensive income/(loss)	76		(333)	(156)	(94)
Net Unrealized Gains/(Losses) on Cash Flow Hedges | Reclassifications
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Cost of sales	13		(58)	10	(108)
SG&A expense	7		(42)	3	(82)
Other (income) and expense	75		(221)	(12)	(380)
Interest expense	7		0	9	0
Net Unrealized Gains/(Losses) on Cash Flow Hedges | Reclassifications | Cost of sales
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Provision for/(benefit from) income taxes	(5)		17	(5)	32
Net (income) loss	8		(41)	5	(76)
Net Unrealized Gains/(Losses) on Cash Flow Hedges | Reclassifications | SG&A expense
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Provision for/(benefit from) income taxes	(3)		12	(2)	24
Net (income) loss	4		(30)	1	(58)
Net Unrealized Gains/(Losses) on Cash Flow Hedges | Reclassifications | Other (income) and expense
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Provision for/(benefit from) income taxes	(29)		85	5	146
Net (income) loss	46		(136)	(7)	(234)
Net Unrealized Gains/(Losses) on Cash Flow Hedges | Reclassifications | Interest expense
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Provision for/(benefit from) income taxes	(3)		0	(4)	0
Net (income) loss	5		0	6	0
Net Change Retirement-Related Benefit Plans
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Unrealized gains/(losses) arising during the period, Net of Tax Amount				(34)	19
Reclassification/amortization, Net of Tax Amount				840	1,058
Other comprehensive income/(loss), Before Tax Amount	754		894	1,277	1,635
Other comprehensive income/(loss), Tax (Expense)/Benefit	(283)		(310)	(471)	(558)
Other comprehensive income/(loss)	471		585	806	1,077
Retirement-Related Benefit Plans, Prior Service Costs/(Credits)
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Unrealized gains/(losses) arising during the period, Before Tax Amount			1		6
Unrealized gains/(losses) arising during the period, Tax (Expense)/Benefit			0		(2)
Unrealized gains/(losses) arising during the period, Net of Tax Amount			1		4
Reclassification/amortization, Before Tax Amount	(27)		(25)	(53)	(51)
Reclassification/amortization, Tax (Expense)/Benefit	10		9	19	17
Reclassification/amortization, Net of Tax Amount	(17)		(16)	(33)	(33)
Retirement-Related Benefit Plans, Net Gains/(Losses)
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Unrealized gains/(losses) arising during the period, Before Tax Amount	78		93	(68)	16
Unrealized gains/(losses) arising during the period, Tax (Expense)/Benefit	(27)		(31)	25	(5)
Unrealized gains/(losses) arising during the period, Net of Tax Amount	51		62	(43)	10
Reclassification/amortization, Before Tax Amount	693		821	1,383	1,656
Reclassification/amortization, Tax (Expense)/Benefit	(263)		(285)	(510)	(565)
Reclassification/amortization, Net of Tax Amount	431		536	873	1,091
Retirement-Related Benefit Plans, Curtailments and Settlements
Reclassifications and Taxes Related to Items of Other Comprehensive Income
Unrealized gains/(losses) arising during the period, Before Tax Amount	10		3	14	7
Unrealized gains/(losses) arising during the period, Tax (Expense)/Benefit	(4)		(1)	(5)	(2)
Unrealized gains/(losses) arising during the period, Net of Tax Amount	$ 6		$ 2	$ 9	$ 5