Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Product revenue	$ 2,744	$ 2,400	$ 2,228
Service revenue	2,699	2,410	2,371
Total revenue	5,443	4,810	4,599
Cost of products	2,209	1,923	1,808
Cost of services	2,099	1,923	1,911
Selling, general and administrative expenses	805	696	636
Research and development expenses	177	162	141
Impairment of long-lived and other assets	88	0	0
Total operating expenses	5,378	4,704	4,496
Income from operations	65	106	103
Interest expense	(13)	(2)	(10)
Other (expense) income, net	(3)	(11)	(31)
Income from continuing operations before income taxes	49	93	62
Income tax (benefit) expense	0	(26)	(3)
Income from continuing operations	49	119	65
Income (loss) from discontinued operations, net of tax	3	18	(95)
Net income (loss)	52	137	(30)
Net (loss) income attributable to noncontrolling interests	(1)	3	3
Net income (loss) attributable to NCR	53	134	(33)
Amounts attributable to NCR common stockholders:
Income from continuing operations	50	116	62
Income (loss) from discontinued operations, net of tax	3	18	(95)
Net income (loss) attributable to NCR common stockholders	$ 53	$ 134	$ (33)
Net Income per share attributable to NCR common stockholders:
Basic	$ 0.32	$ 0.73	$ 0.39
Diluted	$ 0.31	$ 0.72	$ 0.39
Net income (loss) per common share
Basic	$ 0.34	$ 0.84	$ (0.21)
Diluted	$ 0.33	$ 0.83	$ (0.21)
Weighted average common shares outstanding
Basic	158.0	159.8	158.9
Diluted	161.0	161.2	160.1