CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Net income	$ 1,679	$ 1,750
Other comprehensive income/(loss), before tax:
Foreign currency translation adjustments	(167)	161
Net changes related to available-for-sale securities:
Unrealized gains/(losses) arising during the period	(2)	(1)
Reclassification of (gains)/losses to net income	0	1
Total net changes related to available-for-sale securities	(3)	0
Unrealized gains/(losses) on cash flow hedges:
Unrealized gains/(losses) arising during the period	61	(33)
Reclassification of (gains)/losses to net income	(54)	(98)
Total unrealized gains/(losses) on cash flow hedges	7	(130)
Retirement-related benefit plans:
Prior service costs/(credits)	(1)	0
Net (losses)/gains arising during the period	2	61
Curtailments and settlements	0	(1)
Amortization of prior service (credits)/costs	(19)	(21)
Amortization of net (gains)/losses	753	710
Total retirement-related benefit plans	735	748
Other comprehensive income/(loss), before tax	573	779
Income tax (expense)/benefit related to items of other comprehensive income	(143)	(92)
Other comprehensive income/(loss), net of tax	430	688
Total comprehensive income/(loss)	$ 2,109	$ 2,438