Segment Information and Concentrations - Revenue and Operating Income By Segments (Details) $ in Millions		3 Months Ended
		Mar. 31, 2016 USD ($) segment	Mar. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment		3
Revenue by segment		$ 1,444	$ 1,476
Operating income by segment		139	146
Other adjustments	[1]	38	51
Income from operations		101	95
Restructuring and transformation costs		4	16
Acquisition Related Amortization Costs Included in Other Adjustments		32	32
Acquisiton Related Costs Included In Other Adjustments		2	2
Legal Costs for OFAC and FCPA Investigations		0	1
Software Segment [Domain]
Segment Reporting Information [Line Items]
Revenue by segment		419	414
Operating income by segment		115	117
Services Segment [Domain]
Segment Reporting Information [Line Items]
Revenue by segment		543	523
Operating income by segment		34	36
Hardware Segment [Domain]
Segment Reporting Information [Line Items]
Revenue by segment		482	539
Operating income by segment		$ (10)	$ (7)

[1] (1) The following table presents the other adjustments for NCR:In millionsThree months ended March 312016 2015Restructuring / transformation costs$4 $16Acquisition-related amortization of intangible assets32 32Acquisition-related costs2 2OFAC and FCPA investigations— 1Total other adjustments$38 $51