Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income (loss)	$ 63	$ 51
Other comprehensive income (loss):
Currency translation adjustments	(22)	(1)
Unrealized gain (loss) on derivatives	4	(5)
Less income tax expense	(1)	0
Unrealized gain on securities	3	1
Employee benefit plans
Amortization of prior service benefit	(18)	(5)
Net gain arising during the year	48	0
Actuarial loss included in benefits expense	2	4
Less income tax (expense) benefit	(12)	1
Total comprehensive income	67	46
Less comprehensive income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests	2	1
Currency translation adjustments	(1)	(2)
Amounts attributable to noncontrolling interests	1	(1)
Comprehensive income attributable to NCR common stockholders	$ 66	$ 47