Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed Consolidated Statements of Operations
Product revenue	$ 667	$ 570
Service revenue	743	674
Total revenue	1,410	1,244
Cost of products	503	445
Cost of services	538	484
Selling, general and administrative expenses	229	191
Research and development expenses	55	46
Total operating expenses	1,325	1,166
Income from operations	85	78
Interest expense	(21)	(9)
Other income (expense), net	2	(2)
Income from continuing operations before income taxes	66	67
Income tax expense	2	7
Loss from discontinued operations, net of tax	(1)	(9)
Net income (loss)	63	51
Net income attributable to noncontrolling interests	2	1
Net income (loss) attributable to NCR	61	50
Amounts attributable to NCR common stockholders:
Income from continuing operations	64	60
Income from continuing operations	62	59
Loss from discontinued operations, net of tax	(1)	(9)
Net income (loss)	$ 61	$ 50
Income per share attributable to NCR common stockholders:
Basic (in dolars per share)	$ 0.38	$ 0.37
Diluted (in dollars per share)	$ 0.37	$ 0.36
Net income per common share
Basic (in dollars per share)	$ 0.37	$ 0.32
Diluted (in dollars per share)	$ 0.36	$ 0.31
Weighted average common shares outstanding
Basic (in shares)	163.7	158.2
Diluted (in shares)	167.5	162.3