CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Net income	$ 1,130	$ 1,698	$ 3,410	$ 4,234
Other comprehensive income/(loss), before tax
Foreign currency translation adjustments	(114)	(439)	463	(1,354)
Net changes related to available-for-sale securities
Unrealized gains/(losses) arising during the period	0	(1)	0	0
Total net changes related to available-for-sale securities	0	(1)	0	0
Unrealized gains/(losses) on cash flow hedges
Unrealized gains/(losses) arising during the period	109	(32)	262	(249)
Reclassification of (gains)/losses to net income	32	(69)	282	(37)
Total unrealized gains/(losses) on cash flow hedges	141	(101)	545	(285)
Retirement-related benefit plans
Prior service costs/(credits)	0	(1)	0	(5)
Net (losses)/gains arising during the period	1	0	23	65
Curtailments and settlements	13	21	46	42
Amortization of prior service (credits)/costs	3	0	8	1
Amortization of net (gains)/losses	638	586	1,929	1,722
Total retirement-related benefit plans	656	607	2,006	1,826
Other comprehensive income/(loss), before tax	683	66	3,014	187
Income tax (expense)/benefit related to items of other comprehensive income	(333)	106	(978)	(175)
Other comprehensive income/(loss), net of tax	350	172	2,035	12
Total comprehensive income	$ 1,480	$ 1,870	$ 5,446	$ 4,247