CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Millions, unless otherwise specified	Total	Total IBM Stockholders' Equity	Common Stock and Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income/(Loss)	Non-Controlling Interests
Equity - at Dec. 31, 2013	$ 22,929	$ 22,792	$ 51,594	$ 130,042	$ (137,242)	$ (21,602)	$ 137
Net income plus other comprehensive income/(loss)
Net income	2,384	2,384		2,384
Other comprehensive income/(loss)	446	446				446
Total comprehensive income/(loss)	2,830	2,830
Cash dividends paid - common stock	(990)	(990)		(990)
Common stock issued under employee plans (Shares - 2,125,560 and 3,105,227 for the three months ended March 31, 2015 and 2014, respectively	333	333	333
Purchases (Shares - 363,779 and 488,203) and sales (Shares - 187,271 and 328,673) of treasury stock under employee plans - net, for the three months ended March 31, 2015 and 2014, respectively	(51)	(51)		(5)	(46)
Other treasury shares purchased, not retired (Shares - 7,738,744 and 45,153,202 for the three months ended March 31, 2015 and 2014, respectively)	(8,324)	(8,324)			(8,324)
Changes in other equity	16	16	16
Changes in noncontrolling interests	(4)						(4)
Equity - at Mar. 31, 2014	16,740	16,607	51,943	131,431	(145,612)	(21,156)	133
Equity - at Dec. 31, 2014	12,014	11,868	52,666	137,793	(150,715)	(27,875)	146
Net income plus other comprehensive income/(loss)
Net income	2,328	2,328		2,328
Other comprehensive income/(loss)	33	33				33
Total comprehensive income/(loss)	2,361	2,361
Cash dividends paid - common stock	(1,088)	(1,088)		(1,088)
Common stock issued under employee plans (Shares - 2,125,560 and 3,105,227 for the three months ended March 31, 2015 and 2014, respectively	259	259	259
Purchases (Shares - 363,779 and 488,203) and sales (Shares - 187,271 and 328,673) of treasury stock under employee plans - net, for the three months ended March 31, 2015 and 2014, respectively	(35)	(35)		(3)	(33)
Other treasury shares purchased, not retired (Shares - 7,738,744 and 45,153,202 for the three months ended March 31, 2015 and 2014, respectively)	(1,227)	(1,227)			(1,227)
Changes in other equity	3	3	3
Changes in noncontrolling interests	3						3
Equity - at Mar. 31, 2015	$ 12,289	$ 12,141	$ 52,928	$ 139,030	$ (151,975)	$ (27,842)	$ 148