Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 80	$ 35	$ 110	$ 49
Other comprehensive income (loss):
Currency translation adjustments	(12)	(2)	(13)	9
Unrealized gain (loss) on derivatives	1	(3)	(4)	(12)
Gains (losses) arising during the period	(2)	2	(2)	2
Less income tax effect	2	0	2	2
Unrealized gain (loss) on securities	(1)	0	0	(1)
Employee benefit plans
Amortization of prior service benefit	(5)	(3)	(10)	(6)
Actuarial loss included in benefits expense	32	51	63	101
Less income tax effect	(6)	(12)	(12)	(22)
Total comprehensive income	89	68	134	122
Less comprehensive income attributable to noncontrolling interests:
Net income	0	2	1	3
Currency translation adjustments	0	0	(2)	1
Amounts attributable to noncontrolling interests	0	2	(1)	4
Comprehensive income attributable to NCR common stockholders	$ 89	$ 66	$ 135	$ 118