Condensed Consolidating Supplemental Guarantor Information Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Cash and cash equivalents	$ 424	$ 528	$ 460	$ 1,069
Restricted cash		1,114
Accounts receivable, net	1,454	1,339
Inventories	777	790
Due from affiliates	0	0
Other current assets	557	568
Total current assets	3,212	4,339
Property, plant and equipment, net	398	352
Goodwill	2,773	1,534
Intangibles, net	962	494
Prepaid pension cost	506	478
Deferred income taxes	245	441
Investments in subsidiaries	0	0
Due from affiliates	0	0
Other assets	514	470
Total assets	8,610	8,108
Short-term borrowings	85	34
Accounts payable	705	670
Payroll and benefits liabilities	203	191
Deferred service revenue and customer deposits	529	525
Due to affiliates	0	0
Other current liabilities	486	461
Total current liabilities	2,008	1,881
Long-term debt	3,660	3,320
Pension and indemnity plan liabilities	513	532
Postretirement and postemployment benefits liabilities	172	169
Income tax accruals	189	189
Environmental liabilities	48	121
Due to affiliates	0	0
Other liabilities	76	99
Total liabilities	6,666	6,311
Redeemable noncontrolling interest	12	14
Total NCR stockholders’ equity	1,918	1,769
Noncontrolling interests in subsidiaries	14	14
Total stockholders’ equity	1,932	1,783
Total liabilities and stockholders’ equity	8,610	8,108
Parent Company [Member]
Cash and cash equivalents	20	75	44	571
Restricted cash		1,114
Accounts receivable, net	427	424
Inventories	270	319
Due from affiliates	1,379	333
Other current assets	361	360
Total current assets	2,457	2,625
Property, plant and equipment, net	160	146
Goodwill	872	872
Intangibles, net	206	234
Prepaid pension cost	0	0
Deferred income taxes	303	321
Investments in subsidiaries	3,460	2,665
Due from affiliates	27	28
Other assets	353	334
Total assets	7,838	7,225
Short-term borrowings	77	28
Accounts payable	242	254
Payroll and benefits liabilities	84	78
Deferred service revenue and customer deposits	162	155
Due to affiliates	1,173	1,007
Other current liabilities	197	219
Total current liabilities	1,935	1,741
Long-term debt	3,641	3,296
Pension and indemnity plan liabilities	243	234
Postretirement and postemployment benefits liabilities	24	25
Income tax accruals	3	4
Environmental liabilities	48	121
Due to affiliates	17	17
Other liabilities	9	18
Total liabilities	5,920	5,456
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	1,918	1,769
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	1,918	1,769
Total liabilities and stockholders’ equity	7,838	7,225
Guarantor Subsidiary [Member]
Cash and cash equivalents	8	11	22	6
Restricted cash		0
Accounts receivable, net	26	14
Inventories	5	11
Due from affiliates	999	854
Other current assets	27	25
Total current assets	1,065	915
Property, plant and equipment, net	1	1
Goodwill	0	0
Intangibles, net	0	0
Prepaid pension cost	0	0
Deferred income taxes	72	68
Investments in subsidiaries	2,059	1,927
Due from affiliates	20	20
Other assets	46	40
Total assets	3,263	2,971
Short-term borrowings	0	0
Accounts payable	1	1
Payroll and benefits liabilities	0	1
Deferred service revenue and customer deposits	20	12
Due to affiliates	126	123
Other current liabilities	6	7
Total current liabilities	153	144
Long-term debt	0	0
Pension and indemnity plan liabilities	0	0
Postretirement and postemployment benefits liabilities	0	0
Income tax accruals	10	10
Environmental liabilities	0	0
Due to affiliates	44	44
Other liabilities	0	0
Total liabilities	207	198
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	3,056	2,773
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	3,056	2,773
Total liabilities and stockholders’ equity	3,263	2,971
Non-Guarantor Subsidiaries [Member]
Cash and cash equivalents	396	442	394	492
Restricted cash		0
Accounts receivable, net	1,001	901
Inventories	502	460
Due from affiliates	306	298
Other current assets	247	209
Total current assets	2,452	2,310
Property, plant and equipment, net	237	205
Goodwill	1,901	662
Intangibles, net	756	260
Prepaid pension cost	506	478
Deferred income taxes	46	52
Investments in subsidiaries	0	0
Due from affiliates	44	45
Other assets	115	96
Total assets	6,057	4,108
Short-term borrowings	8	6
Accounts payable	462	415
Payroll and benefits liabilities	119	112
Deferred service revenue and customer deposits	347	358
Due to affiliates	1,385	355
Other current liabilities	361	261
Total current liabilities	2,682	1,507
Long-term debt	19	24
Pension and indemnity plan liabilities	270	298
Postretirement and postemployment benefits liabilities	148	144
Income tax accruals	176	175
Environmental liabilities	0	0
Due to affiliates	30	32
Other liabilities	243	81
Total liabilities	3,568	2,261
Redeemable noncontrolling interest	12	14
Total NCR stockholders’ equity	2,463	1,819
Noncontrolling interests in subsidiaries	14	14
Total stockholders’ equity	2,477	1,833
Total liabilities and stockholders’ equity	6,057	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	(2,684)	(1,485)
Other current assets	(78)	(26)
Total current assets	(2,762)	(1,511)
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangibles, net	0	0
Prepaid pension cost	0	0
Deferred income taxes	(176)	0
Investments in subsidiaries	(5,519)	(4,592)
Due from affiliates	(91)	(93)
Other assets	0	0
Total assets	(8,548)	(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	(2,684)	(1,485)
Other current liabilities	(78)	(26)
Total current liabilities	(2,762)	(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	(91)	(93)
Other liabilities	(176)	0
Total liabilities	(3,029)	(1,604)
Redeemable noncontrolling interest	0	0
Total NCR stockholders’ equity	(5,519)	(4,592)
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	(5,519)	(4,592)
Total liabilities and stockholders’ equity	$ (8,548)	$ (6,196)