CONSOLIDATED STATEMENT OF EQUITY - USD ($) $ in Millions	Total IBM Stockholders' Equity	Common Stock and Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income/(Loss)	Non-Controlling Interests	Total
Balance at the Beginning of the Period at Dec. 31, 2020	$ 20,597	$ 56,556	$ 162,717	$ (169,339)	$ (29,337)	$ 129	$ 20,727
Net income plus other comprehensive income/(loss):
Net income	2,280		2,280				2,280
Other comprehensive income/(loss)	1,685				1,685		1,685
Total comprehensive income/(loss)	3,965						3,965
Cash dividends paid - common stock	(2,924)		(2,924)				(2,924)
Common stock issued under employee plans	355	355					355
Purchases and sales of treasury stock under employee plans - net	(51)		13	(65)			(51)
Changes in noncontrolling interests						(4)	(4)
Balance at the End of the Period at Jun. 30, 2021	21,942	56,912	162,086	(169,404)	(27,652)	125	22,067
Balance at the Beginning of the Period at Mar. 31, 2021	21,389	56,788	162,218	(169,360)	(28,257)	124	21,513
Net income plus other comprehensive income/(loss):
Net income	1,325		1,325				1,325
Other comprehensive income/(loss)	605				605		605
Total comprehensive income/(loss)	1,930						1,930
Cash dividends paid - common stock	(1,467)		(1,467)				(1,467)
Common stock issued under employee plans	124	124					124
Purchases and sales of treasury stock under employee plans - net	(33)		11	(44)			(33)
Changes in noncontrolling interests						1	1
Balance at the End of the Period at Jun. 30, 2021	21,942	56,912	162,086	(169,404)	(27,652)	125	22,067
Balance at the Beginning of the Period at Dec. 31, 2021	18,901	57,319	154,209	(169,392)	(23,234)	95	18,996
Net income plus other comprehensive income/(loss):
Net income	2,125		2,125				2,125
Other comprehensive income/(loss)	1,066				1,066		1,066
Total comprehensive income/(loss)	3,191						3,191
Cash dividends paid - common stock	(2,963)		(2,963)				(2,963)
Common stock issued under employee plans	420	420					420
Purchases and sales of treasury stock under employee plans - net	(141)		(11)	(130)			(141)
Other equity	0	63	(63)				0
Changes in noncontrolling interests						(27)	(27)
Balance at the End of the Period at Jun. 30, 2022	19,409	57,802	153,298	(169,522)	(22,169)	67	19,476
Balance at the Beginning of the Period at Mar. 31, 2022	19,050	57,603	153,401	(169,422)	(22,532)	62	19,112
Net income plus other comprehensive income/(loss):
Net income	1,392		1,392				1,392
Other comprehensive income/(loss)	363				363		363
Total comprehensive income/(loss)	1,755						1,755
Cash dividends paid - common stock	(1,488)		(1,488)				(1,488)
Common stock issued under employee plans	199	199					199
Purchases and sales of treasury stock under employee plans - net	(107)		(7)	(100)			(107)
Changes in noncontrolling interests						6	6
Balance at the End of the Period at Jun. 30, 2022	$ 19,409	$ 57,802	$ 153,298	$ (169,522)	$ (22,169)	$ 67	$ 19,476