CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income/(loss)	$ 1,704	$ (3,196)	[1]	$ 4,214	$ (1,071)	[1],[2]
Other comprehensive income/(loss), before tax:
Foreign currency translation adjustments	151	143		180	799
Net changes related to available-for-sale securities:
Unrealized gains/(losses) arising during the period	0	0		(1)	(1)
Reclassification of (gains)/losses to net income	0	0		0	0
Total net changes related to available-for-sale securities	0	0		(1)	(1)
Unrealized gains/(losses) on cash flow hedges:
Unrealized gains/(losses) arising during the period	131	189		279	449
Reclassification of (gains)/losses to net income	202	(12)		51	4
Total unrealized gains/(losses) on cash flow hedges	333	178		330	453
Retirement-related benefit plans:
Prior service costs/(credits)	0	412		0	408
Net (losses)/gains arising during the period	102	53		104	63
Curtailments and settlements	2	5,913		7	5,931
Amortization of prior service (credits)/costs	(2)	3		(6)	16
Amortization of net (gains)/losses	128	388		389	1,305
Total retirement-related benefit plans	230	6,768		494	7,722
Other comprehensive income/(loss), before tax	714	7,089		1,003	8,973
Income tax (expense)/benefit related to items of other comprehensive income	(313)	(2,058)		(361)	(2,877)
Other comprehensive income/(loss), net of tax	402	5,030		642	6,096
Total comprehensive income	$ 2,105	$ 1,834		$ 4,857	$ 5,025

[1] Includes the impact of a one-time, non-cash pension settlement charge. Refer to note 18, "Retirement-Related Benefits," for additional information.

[2] ncludes immaterial cash flows from discontinued operations.