| Document and Entity Information | Feb. 11, 2020 |
| Document and Entity Information | |
| Document Type | 8-K |
| Document Period End Date | Feb. 11, 2020 |
| Entity Registrant Name | NCR CORP |
| Entity File Number | 001-00395 |
| Entity Incorporation, State or Country Code | MD |
| Entity Tax Identification Number | 31-0387920 |
| Entity Address, Address Line One | 864 Spring Street NW |
| Entity Address, City or Town | Atlanta |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30308 |
| City Area Code | 937 |
| Local Phone Number | 445-5000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | NCR |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000070866 |
| Amendment Flag | false |
