CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Net income	$ 1,591	$ 1,679
Other comprehensive income/(loss), before tax:
Foreign currency translation adjustments	171	(167)
Net changes related to available-for-sale securities:
Unrealized gains/(losses) arising during the period	(1)	(2)
Reclassification of (gains)/losses to net income		0
Total net changes related to available-for-sale securities	(1)	(3)
Unrealized gains/(losses) on cash flow hedges:
Unrealized gains/(losses) arising during the period	(352)	61
Reclassification of (gains)/losses to net income	98	(54)
Total unrealized gains/(losses) on cash flow hedges	(254)	7
Retirement-related benefit plans:
Prior service costs/(credits)		(1)
Net (losses)/gains arising during the period	(4)	2
Curtailments and settlements	1	0
Amortization of prior service (credits)/costs	(3)	(19)
Amortization of net (gains)/losses	464	753
Total retirement-related benefit plans	458	735
Other comprehensive income/(loss), before tax	375	573
Income tax (expense)/benefit related to items of other comprehensive income	(67)	(143)
Other comprehensive income/(loss), net of tax	308	430
Total comprehensive income/(loss)	$ 1,899	$ 2,109