Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net (loss) income	$ (174)	$ 195	$ 447
Currency translation adjustments
Currency translation adjustments	(50)	(76)	(53)
Derivatives
Unrealized gain (loss) on derivatives	10	(1)	2
(Gains) losses on derivatives arising during the period	(7)	4	6
Less income tax (expense) benefit	(1)	(1)	(3)
Securities
Unrealized gain on securities	0	0	3
Gains on securities arising during the period	0	(4)	0
Less income tax expense	0	1	(1)
Employee benefit plans
New prior service cost	9	(16)	(5)
Amortization of prior service benefit	(21)	(20)	(30)
Net gain arising during the period	43	8	82
Amortization of actuarial loss	2	0	8
Less income tax (expense) benefit	(2)	4	(17)
Other comprehensive loss	(17)	(101)	(8)
Total comprehensive (loss) income	(191)	94	439
Less comprehensive income attributable to noncontrolling interests:
Net income	4	4	4
Currency translation adjustments	(3)	(3)	(7)
Amounts attributable to noncontrolling interests	1	1	(3)
Comprehensive (loss) income attributable to NCR common stockholders	$ (192)	$ 93	$ 442