Condensed Consolidating Guarantor Information Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Cash and cash equivalents	$ 515	$ 528	$ 483	$ 1,069
Restricted cash		1,114
Accounts receivable, net	1,442	1,339
Inventories	820	790
Due from affiliates	0	0
Other current assets	608	568
Total current assets	3,385	4,339
Property, plant and equipment, net	390	352
Goodwill	2,789	1,534
Intangibles, net	1,024	494
Prepaid pension cost	495	478
Deferred income taxes	252	441
Investments in subsidiaries	0	0
Due from affiliates	0	0
Other assets	493	470
Total assets	8,828	8,108
Short-term borrowings	64	34
Accounts payable	695	670
Payroll and benefits liabilities	183	191
Deferred service revenue and customer deposits	587	525
Due to affiliates	0	0
Other current liabilities	479	461
Total current liabilities	2,008	1,881
Long-term debt	3,885	3,320
Pension and indemnity plan liabilities	532	532
Postretirement and postemployment benefits liabilities	170	169
Income tax accruals	182	189
Environmental liabilities	111	121
Due to affiliates	0	0
Other liabilities	92	99
Total liabilities	6,980	6,311
Redeemable noncontrolling interest	14	14
Total NCR stockholders’ equity	1,820	1,769
Noncontrolling interests in subsidiaries	14	14
Total stockholders’ equity	1,834	1,783
Total liabilities and stockholders’ equity	8,828	8,108
Parent Company [Member]
Cash and cash equivalents	48	75	38	571
Restricted cash		1,114
Accounts receivable, net	447	424
Inventories	301	319
Due from affiliates	1,374	333
Other current assets	389	360
Total current assets	2,559	2,625
Property, plant and equipment, net	152	146
Goodwill	872	872
Intangibles, net	225	234
Prepaid pension cost	0	0
Deferred income taxes	320	321
Investments in subsidiaries	3,293	2,665
Due from affiliates	28	28
Other assets	348	334
Total assets	7,797	7,225
Short-term borrowings	52	28
Accounts payable	236	254
Payroll and benefits liabilities	57	78
Deferred service revenue and customer deposits	176	155
Due to affiliates	958	1,007
Other current liabilities	227	219
Total current liabilities	1,706	1,741
Long-term debt	3,862	3,296
Pension and indemnity plan liabilities	237	234
Postretirement and postemployment benefits liabilities	24	25
Income tax accruals	3	4
Environmental liabilities	111	121
Due to affiliates	17	17
Other liabilities	17	18
Total liabilities	5,977	5,456
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	1,820	1,769
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	1,820	1,769
Total liabilities and stockholders’ equity	7,797	7,225
Guarantor Subsidiary [Member]
Cash and cash equivalents	8	11	9	6
Restricted cash		0
Accounts receivable, net	18	14
Inventories	7	11
Due from affiliates	865	854
Other current assets	25	25
Total current assets	923	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	2,000	1,927
Due from affiliates	20	20
Other assets	40	40
Total assets	3,052	2,971
Short-term borrowings	0	0
Accounts payable	1	1
Payroll and benefits liabilities	1	1
Deferred service revenue and customer deposits	15	12
Due to affiliates	119	123
Other current liabilities	7	7
Total current liabilities	143	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	45	44
Other liabilities	0	0
Total liabilities	197	198
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	2,855	2,773
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	2,855	2,773
Total liabilities and stockholders’ equity	3,052	2,971
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	459	442	436	492
Restricted cash		0
Accounts receivable, net	977	901
Inventories	512	460
Due from affiliates	234	298
Other current assets	236	209
Total current assets	2,418	2,310
Property, plant and equipment, net	237	205
Goodwill	1,917	662
Intangibles, net	799	260
Prepaid pension cost	495	478
Deferred income taxes	49	52
Investments in subsidiaries	0	0
Due from affiliates	46	45
Other assets	105	96
Total assets	6,066	4,108
Short-term borrowings	12	6
Accounts payable	458	415
Payroll and benefits liabilities	125	112
Deferred service revenue and customer deposits	396	358
Due to affiliates	1,396	355
Other current liabilities	287	261
Total current liabilities	2,674	1,507
Long-term debt	23	24
Pension and indemnity plan liabilities	295	298
Postretirement and postemployment benefits liabilities	146	144
Income tax accruals	170	175
Environmental liabilities	0	0
Due to affiliates	32	32
Other liabilities	260	81
Total liabilities	3,600	2,261
Redeemable noncontrolling interest	14	14
Total NCR stockholders’ equity	2,438	1,819
Noncontrolling interests in subsidiaries	14	14
Total stockholders’ equity	2,452	1,833
Total liabilities and stockholders’ equity	6,066	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	(2,473)	(1,485)
Other current assets	(42)	(26)
Total current assets	(2,515)	(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	(5,293)	(4,592)
Due from affiliates	(94)	(93)
Other assets	0	0
Total assets	(8,087)	(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	(2,473)	(1,485)
Other current liabilities	(42)	(26)
Total current liabilities	(2,515)	(1,511)
Long-term debt	0	0
Pension and indemnity plan liabilities	0	0
Postretirement and postemployment benefits liabilities	0	0
Income tax accruals	0	0
Environmental liabilities	0	0
Due to affiliates	(94)	(93)
Other liabilities	(185)	0
Total liabilities	(2,794)	(1,604)
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	(5,293)	(4,592)
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	(5,293)	(4,592)
Total liabilities and stockholders’ equity	$ (8,087)	$ (6,196)