Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Product revenue	$ 634	$ 667
Service revenue	884	743
Total revenue	1,518	1,410
Cost of products	476	503
Cost of services	626	538
Selling, general and administrative expenses	245	229
Research and development expenses	63	55
Total operating expenses	1,410	1,325
Income from operations	108	85
Interest expense	(43)	(21)
Other (expense) income, net	(7)	2
Income from continuing operations before income taxes	58	66
Income tax expense	4	2
Income from continuing operations	54	64
Loss from discontinued operations, net of tax	0	(1)
Net income	54	63
Net income	1	2
Net income (loss) attributable to NCR	53	61
Amounts attributable to NCR common stockholders:
Income from continuing operations	53	62
Loss from discontinued operations, net of tax	0	(1)
Net income (loss)	$ 53	$ 61
Income per share attributable to NCR common stockholders:
Basic (in dollars per share)	$ 0.32	$ 0.38
Diluted (in dollars per share)	$ 0.31	$ 0.37
Net income per common share
Basic (in dollars per share)	$ 0.32	$ 0.37
Diluted (in dollars per share)	$ 0.31	$ 0.36
Weighted average common shares outstanding
Basic (in shares)	167.1	163.7
Diluted (in shares)	171.0	167.5