Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 32	$ 42
Currency translation adjustments
Currency translation adjustments	(8)	(28)
Derivatives
Unrealized gain (loss) on derivatives	(2)	9
(Gains) losses on derivatives arising during the period	1	(1)
Less income tax benefit expense	1	(2)
Employee benefit plans
Amortization of prior service benefit	(5)	(6)
Amortization of actuarial loss	0	1
Less income tax benefit	1	2
Other comprehensive loss	(12)	(25)
Total comprehensive income (loss)	20	17
Less comprehensive income attributable to noncontrolling interests:
Net income	0	2
Currency translation adjustments	(4)	(3)
Amounts attributable to noncontrolling interests	(4)	(1)
Comprehensive (loss) income attributable to NCR common stockholders	$ 24	$ 18