CONSOLIDATED STATEMENT OF CHANGES IN 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, 2014	$ 11,868	$ 52,666	$ 137,793	$ (150,715)	$ (27,875)	$ 146	$ 12,014
Net income plus other comprehensive income/(loss)
Net income	5,777		5,777				5,777
Other comprehensive income/(loss)	444				444		444
Total comprehensive income/(loss)	6,221						6,221
Cash dividends paid - common stock	(2,366)		(2,366)				(2,366)
Common stock issued under employee plans (Shares - 2,867,128 and 3,929,697 for the six months ended June 30, 2016 and 2015, respectively)	395	395					395
Purchases (Shares - 769,837 and 931,120) and sales (Shares - 323,578 and 475,037) of treasury stock under employee plans - net, for the six months ended June 30, 2016 and 2015, respectively	(77)		14	(91)			(77)
Other treasury shares purchased, not retired (Shares - 12,305,377 and 14,467,545 for the six months ended June 30, 2016 and 2015, respectively)	(2,356)			(2,356)			(2,356)
Changes in other equity	(2)	(2)					(2)
Changes in noncontrolling interests						8	8
Balance at the End of the Period at Jun. 30, 2015	13,684	53,059	141,218	(153,162)	(27,432)	153	13,837
Balance at the Beginning of the Period at Dec. 31, 2015	14,262	53,262	146,124	(155,518)	(29,607)	162	14,424
Net income plus other comprehensive income/(loss)
Net income	4,518		4,518				4,518
Other comprehensive income/(loss)	1,002				1,002		1,002
Total comprehensive income/(loss)	5,520						5,520
Cash dividends paid - common stock	(2,590)		(2,590)				(2,590)
Common stock issued under employee plans (Shares - 2,867,128 and 3,929,697 for the six months ended June 30, 2016 and 2015, respectively)	321	321					321
Purchases (Shares - 769,837 and 931,120) and sales (Shares - 323,578 and 475,037) of treasury stock under employee plans - net, for the six months ended June 30, 2016 and 2015, respectively	(56)		16	(71)			(56)
Other treasury shares purchased, not retired (Shares - 12,305,377 and 14,467,545 for the six months ended June 30, 2016 and 2015, respectively)	(1,709)			(1,709)			(1,709)
Changes in other equity	(16)	(18)	2				(16)
Changes in noncontrolling interests						(6)	(6)
Balance at the End of the Period at Jun. 30, 2016	$ 15,733	$ 53,565	$ 148,071	$ (157,298)	$ (28,604)	$ 156	$ 15,889