Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Consolidated Statements of Operations
Product revenue	$ 712	$ 677	$ 1,988	$ 1,747
Service revenue	723	683	2,100	1,943
Total revenue	1,435	1,360	4,088	3,690
Cost of products	536	533	1,515	1,371
Cost of services	541	528	1,560	1,522
Selling, general and administrative expenses	217	227	619	562
Research and development expenses	52	44	155	125
Total operating expenses	1,346	1,332	3,849	3,580
Income from operations	89	28	239	110
Interest expense	(7)	(3)	(24)	(4)
Other (expense) income, net	0	(1)	(7)	4
Income from continuing operations before income taxes	82	24	208	110
Income tax expense	23	2	43	21
Income from continuing operations	59	22	165	89
(Loss) income from discontinued operations, net of tax	(1)	(7)	3	(25)
Net income	58	15	168	64
Net income (loss) attributable to noncontrolling interests	1	(1)	2	2
Net income attributable to NCR	57	16	166	62
Amounts attributable to NCR common stockholders:
Income from continuing operations	58	23	163	87
(Loss) income from discontinued operations, net of tax	(1)	(7)	3	(25)
Net income	$ 57	$ 16	$ 166	$ 62
Income per share attributable to NCR common stockholders:
Basic	$ 0.36	$ 0.15	$ 1.03	$ 0.55
Diluted	$ 0.35	$ 0.14	$ 0.99	$ 0.54
Net income per common share
Basic	$ 0.36	$ 0.10	$ 1.04	$ 0.39
Diluted	$ 0.35	$ 0.10	$ 1.01	$ 0.39
Weighted average common shares outstanding
Basic	159.6	157.4	158.9	158.1
Diluted	164.8	160.2	164.0	160.9