Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income from continuing operations	$ 1,368	$ 1,468
Foreign currency translation adjustments
Foreign currency translation adjustments arising during period	409	146
Less: Reclassification adjustments for loss on sale of an investment in a foreign entity recognized in Other income, net	0	0
Tax benefit	(130)	0
Foreign currency translation adjustments	539	146
Pension and post-retirement benefit plans
Pension and post-retirement benefit plans adjustments during the period	8	1
Amortization of actuarial loss, prior service cost and transition obligation	88	131
Total pension and post-retirement benefit plans, before tax	(96)	(132)
Tax expense	(23)	(49)
Pension and Other Postretirement Benefit Plans, Net of Tax	(73)	(83)
Unrealized gain (loss) on available-for-sale securities
Unrealized holding gain (loss) arising during period	0	(32)
Reclassification adjustments for gain included in Other income, net	0	383
Other Comprehensive Income (Loss), ASU 2016-01 adoption impact on Securities Arising During Period	(5)	0
Total unrealized gain (loss) on available for-sale securities, before tax	(5)	(415)
Tax (benefit) expense	0	(158)
Total unrealized gain (loss) on available for-sale securities, net of tax	(5)	(257)
Change in unrealized cash flow hedging
Unrealized cash flow hedging (loss) gain arising during the period	45	64
Gain (Loss) reclassified into Product Sales	27	(5)
Total unrealized loss (gain) on cash-flow hedging, before tax	18	69
Tax expense	4	15
Total unrealized gain (loss) on cash-flow hedging, net of tax	14	54
Other comprehensive income (loss), net of tax	621	26
Comprehensive income	1,989	1,494
Less: Comprehensive income attributable to noncontrolling interest	104	107
Comprehensive income attributable to common shareowners	$ 1,885	$ 1,387