Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income (loss)	$ 274	$ (174)	$ 195
Currency translation adjustments
Currency translation adjustments	(57)	(50)	(76)
Derivatives
Unrealized gain (loss) on derivatives	19	10	(1)
(Gains) losses on derivatives arising during the period	(1)	(7)	4
Less income tax expense	(4)	(1)	(1)
Securities
Gains on securities arising during the period	0	0	(4)
Less income tax benefit	0	0	1
Employee benefit plans
New prior service benefit (cost)		9	(16)
Amortization of prior service benefit	(19)	(21)	(20)
Net gain arising during the period	(1)	43	8
Amortization of actuarial loss	(2)	2	0
Less income tax (expense) benefit	5	(2)	4
Other comprehensive loss	(60)	(17)	(101)
Total comprehensive income (loss)	214	(191)	94
Less comprehensive income attributable to noncontrolling interests:
Net income	4	4	4
Currency translation adjustments	(5)	(3)	(3)
Amounts attributable to noncontrolling interests	(1)	1	1
Comprehensive income (loss) attributable to NCR common stockholders	$ 215	$ (192)	$ 93