Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements of Operations
Product revenue	$ 706	$ 612	$ 1,276	$ 1,070
Service revenue	703	660	1,377	1,260
Total revenue	1,409	1,272	2,653	2,330
Cost of products	533	479	979	838
Cost of services	519	514	1,019	994
Selling, general and administrative expenses	203	176	402	335
Research and development expenses	53	41	103	81
Total operating expenses	1,308	1,210	2,503	2,248
Income from operations	101	62	150	82
Interest expense	(8)	(1)	(17)	(1)
Other (expense) income, net	(5)	(1)	(7)	5
Income from continuing operations before income taxes	88	60	126	86
Income tax expense	21	13	20	19
Income from continuing operations	67	47	106	67
Income (loss) from discontinued operations, net of tax	13	(12)	4	(18)
Net income	80	35	110	49
Net income attributable to noncontrolling interests	0	2	1	3
Net income attributable to NCR	80	33	109	46
Amounts attributable to NCR common stockholders:
Income from continuing operations	67	45	105	64
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	13	(12)	4	(18)
Net income	$ 80	$ 33	$ 109	$ 46
Income per share attributable to NCR common stockholders:
Basic	$ 0.42	$ 0.29	$ 0.66	$ 0.40
Diluted	$ 0.41	$ 0.28	$ 0.64	$ 0.40
Net income per common share
Basic	$ 0.50	$ 0.21	$ 0.69	$ 0.29
Diluted	$ 0.49	$ 0.21	$ 0.67	$ 0.29
Weighted average common shares outstanding
Basic	159.0	157.8	158.6	158.5
Diluted	163.9	160.7	163.1	161.2