Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 57	$ 32
Currency translation adjustments
Currency translation gains (losses)	24	(8)
Derivatives
Unrealized gain on derivatives	(4)	(2)
(Gains) losses on derivatives recognized during the period	(2)	1
Less income tax benefit	2	1
Employee benefit plans
Amortization of prior service benefit	(2)	(5)
Amortization of actuarial benefit	(1)	0
Less income tax benefit	1	1
Other comprehensive income (loss)	18	(12)
Total comprehensive income	75	20
Less comprehensive income attributable to noncontrolling interests:
Currency translation adjustments	0	(4)
Amounts attributable to noncontrolling interests	0	(4)
Comprehensive income attributable to NCR	$ 75	$ 24