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, 2018		$ 16,796	$ 55,151	$ 159,206	$ (168,071)	$ (29,490)	$ 134	$ 16,929
Net income plus other comprehensive income/(loss):
Net income		1,591		1,591				1,591
Other comprehensive income/(loss)		308				308		308
Total comprehensive income/(loss)		1,899						1,899
Cash dividends paid - common stock		(1,397)		(1,397)				(1,397)
Common stock issued under employee plans		137	137					137
Purchases and sales of treasury stock under employee plans - net		(48)		2	(50)			(48)
Other treasury shares purchased, not retired		(900)			(900)			(900)
Changes in other equity		(5)		(5)				(5)
Changes in noncontrolling interests							(8)	(8)
Balance at the End of the Period at Mar. 31, 2019		16,481	55,287	159,396	(169,021)	(29,182)	126	16,607
Equity
Cumulative effect of change in accounting principle	[1]	(66)		(66)				(66)
Balance at the Beginning of the Period at Dec. 31, 2019		20,841	55,895	162,954	(169,413)	(28,597)	144	20,985
Net income plus other comprehensive income/(loss):
Net income		1,175		1,175				1,175
Other comprehensive income/(loss)		(686)				(686)		(686)
Total comprehensive income/(loss)		489						489
Cash dividends paid - common stock		(1,440)		(1,440)				(1,440)
Common stock issued under employee plans		197	197					197
Purchases and sales of treasury stock under employee plans - net		(21)		3	(24)			(21)
Changes in noncontrolling interests							(15)	(15)
Balance at the End of the Period at Mar. 31, 2020		$ 19,999	$ 56,092	$ 162,626	$ (169,437)	$ (29,283)	$ 129	$ 20,128

[1] *Reflects the adoption of the FASB guidance on credit losses. Refer to note 2, “Accounting Changes.”