Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 1,652	$ 1,790	$ 3,150	$ 3,096
Other comprehensive income (loss), net of tax
Other comprehensive income, net of tax	634	538	44	470
Pension and post-retirement benefit plans
Pension and post-retirement benefit plans adjustments during the period	(7)	(18)	45	1
Amortization of actuarial loss, prior service cost and transition obligation	218	104	435	208
Total pension and post-retirement benefit plans, before tax	(211)	(86)	(480)	(209)
Tax expense	(79)	(29)	(176)	(69)
Pension and Other Postretirement Benefit Plans, Net of Tax	(132)	(57)	(304)	(140)
Unrealized gain on available-for-sale securities
Unrealized holding gain (loss) arising during period	1	(44)	87	(12)
Reclassification adjustments for gain included in Other income, net	26	6	54	30
Total unrealized gain on available for-sale securities, before tax	(25)	(50)	33	(42)
Tax benefit (expense)	(11)	(21)	11	(18)
Total unrealized gain (loss) on available for-sale securities, net of tax	(14)	(29)	22	(24)
Change in unrealized cash flow hedging
Unrealized cash flow hedging gain (loss) arising during the period	62	102	(122)	22
Loss reclassified into Product Sales	(43)	(13)	(100)	(31)
Total unrealized loss on cash-flow hedging, before tax	105	115	(22)	53
Tax (expense) benefit	29	29	(7)	17
Total unrealized loss on cash-flow hedging, net of tax	76	86	(15)	36
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent [Abstract]
Foreign currency translation adjustments arising during period	439	424	(266)	315
Reclassification adjustments for loss (gain) on sale of an investment in a foreign entity recognized in Other income, net	(1)	0	1	(3)
Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent	440	424	(267)	318
Comprehensive income	2,286	2,328	3,194	3,566
Comprehensive income attributable to noncontrolling interest	110	110	142	196
Comprehensive income attributable to common shareowners	$ 2,176	$ 2,218	$ 3,052	$ 3,370