CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Net income	$ 2,726	$ 2,853	$ 6,807	$ 7,371
Other comprehensive income/(loss), before tax:
Foreign currency translation adjustments	89	(99)	213	(109)
Net changes related to available-for-sale securities:
Unrealized gains/(losses) arising during the period	(1)	(1)	2	(36)
Reclassification of (gains)/losses to net income	0	(1)	1	36
Total net changes related to available-for-sale securities	(2)	(2)	2	0
Unrealized gains/(losses) on cash flow hedges:
Unrealized gains/(losses) arising during the period	(70)	35	(198)	(221)
Reclassification of (gains)/losses to net income	(73)	15	(347)	26
Total unrealized gains/(losses) on cash flow hedges	(143)	50	(545)	(195)
Retirement-related benefit plans:
Prior service costs/(credits)	0		0
Net (losses)/gains arising during the period	1	11	106	(57)
Curtailments and settlements	2	4	3	19
Amortization of prior service (credits)/costs	(22)	(28)	(66)	(81)
Amortization of net (gains)/losses	733	696	2,156	2,079
Total retirement-related benefit plans	713	683	2,200	1,960
Other comprehensive income/(loss), before tax	658	632	1,869	1,656
Income tax (expense)/benefit related to items of other comprehensive income	11	(192)	7	(213)
Other comprehensive income/(loss)	669	440	1,877	1,442
Total comprehensive income/(loss)	$ 3,394	$ 3,293	$ 8,684	$ 8,813