Condensed Consolidating Supplemental Guarantor Information Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Cash and cash equivalents	$ 483	$ 528	$ 460	$ 1,069
Restricted cash		1,114
Accounts receivable, net	1,464	1,339
Inventories	816	790
Due from affiliates	0	0
Other current assets	627	568
Total current assets	3,390	4,339
Property, plant and equipment, net	402	352
Goodwill	2,791	1,534
Intangibles, net	994	494
Prepaid pension cost	520	478
Deferred income taxes	247	441
Investments in subsidiaries	0	0
Due from affiliates	0	0
Other assets	505	470
Total assets	8,849	8,108
Short-term borrowings	83	34
Accounts payable	678	670
Payroll and benefits liabilities	188	191
Deferred service revenue and customer deposits	563	525
Due to affiliates	0	0
Other current liabilities	464	461
Total current liabilities	1,976	1,881
Long-term debt	3,840	3,320
Pension and indemnity plan liabilities	529	532
Postretirement and postemployment benefits liabilities	169	169
Income tax accruals	178	189
Environmental liabilities	101	121
Due to affiliates	0	0
Other liabilities	87	99
Total liabilities	6,880	6,311
Redeemable noncontrolling interest	15	14
Total NCR stockholders’ equity	1,941	1,769
Noncontrolling interests in subsidiaries	13	14
Total stockholders’ equity	1,954	1,783
Total liabilities and stockholders’ equity	8,849	8,108
Parent Company [Member]
Cash and cash equivalents	29	75	41	571
Restricted cash		1,114
Accounts receivable, net	436	424
Inventories	292	319
Due from affiliates	1,373	333
Other current assets	416	360
Total current assets	2,546	2,625
Property, plant and equipment, net	160	146
Goodwill	872	872
Intangibles, net	215	234
Prepaid pension cost	0	0
Deferred income taxes	315	321
Investments in subsidiaries	3,477	2,665
Due from affiliates	28	28
Other assets	357	334
Total assets	7,970	7,225
Short-term borrowings	69	28
Accounts payable	237	254
Payroll and benefits liabilities	66	78
Deferred service revenue and customer deposits	160	155
Due to affiliates	1,087	1,007
Other current liabilities	194	219
Total current liabilities	1,813	1,741
Long-term debt	3,820	3,296
Pension and indemnity plan liabilities	240	234
Postretirement and postemployment benefits liabilities	24	25
Income tax accruals	4	4
Environmental liabilities	101	121
Due to affiliates	17	17
Other liabilities	10	18
Total liabilities	6,029	5,456
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	1,941	1,769
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	1,941	1,769
Total liabilities and stockholders’ equity	7,970	7,225
Guarantor Subsidiary [Member]
Cash and cash equivalents	15	11	15	6
Restricted cash		0
Accounts receivable, net	22	14
Inventories	6	11
Due from affiliates	983	854
Other current assets	26	25
Total current assets	1,052	915
Property, plant and equipment, net	1	1
Goodwill	0	0
Intangibles, net	0	0
Prepaid pension cost	0	0
Deferred income taxes	68	68
Investments in subsidiaries	2,076	1,927
Due from affiliates	20	20
Other assets	40	40
Total assets	3,257	2,971
Short-term borrowings	0	0
Accounts payable	1	1
Payroll and benefits liabilities	0	1
Deferred service revenue and customer deposits	23	12
Due to affiliates	127	123
Other current liabilities	6	7
Total current liabilities	157	144
Long-term debt	0	0
Pension and indemnity plan liabilities	0	0
Postretirement and postemployment benefits liabilities	0	0
Income tax accruals	9	10
Environmental liabilities	0	0
Due to affiliates	44	44
Other liabilities	0	0
Total liabilities	210	198
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	3,047	2,773
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	3,047	2,773
Total liabilities and stockholders’ equity	3,257	2,971
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	439	442	404	492
Restricted cash		0
Accounts receivable, net	1,006	901
Inventories	518	460
Due from affiliates	295	298
Other current assets	245	209
Total current assets	2,503	2,310
Property, plant and equipment, net	241	205
Goodwill	1,919	662
Intangibles, net	779	260
Prepaid pension cost	520	478
Deferred income taxes	49	52
Investments in subsidiaries	0	0
Due from affiliates	44	45
Other assets	109	96
Total assets	6,164	4,108
Short-term borrowings	14	6
Accounts payable	440	415
Payroll and benefits liabilities	122	112
Deferred service revenue and customer deposits	380	358
Due to affiliates	1,437	355
Other current liabilities	324	261
Total current liabilities	2,717	1,507
Long-term debt	20	24
Pension and indemnity plan liabilities	289	298
Postretirement and postemployment benefits liabilities	145	144
Income tax accruals	166	175
Environmental liabilities	0	0
Due to affiliates	31	32
Other liabilities	262	81
Total liabilities	3,630	2,261
Redeemable noncontrolling interest	15	14
Total NCR stockholders’ equity	2,506	1,819
Noncontrolling interests in subsidiaries	13	14
Total stockholders’ equity	2,519	1,833
Total liabilities and stockholders’ equity	6,164	4,108
Consolidation, Eliminations [Member]
Cash and cash equivalents	0	0	0	0
Restricted cash		0
Accounts receivable, net	0	0
Inventories	0	0
Due from affiliates	(2,651)	(1,485)
Other current assets	(60)	(26)
Total current assets	(2,711)	(1,511)
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangibles, net	0	0
Prepaid pension cost	0	0
Deferred income taxes	(185)	0
Investments in subsidiaries	(5,553)	(4,592)
Due from affiliates	(92)	(93)
Other assets	(1)	0
Total assets	(8,542)	(6,196)
Short-term borrowings	0	0
Accounts payable	0	0
Payroll and benefits liabilities	0	0
Deferred service revenue and customer deposits	0	0
Due to affiliates	(2,651)	(1,485)
Other current liabilities	(60)	(26)
Total current liabilities	(2,711)	(1,511)
Long-term debt	0	0
Pension and indemnity plan liabilities	0	0
Postretirement and postemployment benefits liabilities	0	0
Income tax accruals	(1)	0
Environmental liabilities	0	0
Due to affiliates	(92)	(93)
Other liabilities	(185)	0
Total liabilities	(2,989)	(1,604)
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	(5,553)	(4,592)
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	(5,553)	(4,592)
Total liabilities and stockholders’ equity	$ (8,542)	$ (6,196)