v2.4.0.8
Document and Entity Information (USD $)
In Billions, except Share data in Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Feb. 10, 2015
Jun. 30, 2014
Document and Entity Information      
Document Type 10-K    
Document Period End Date Dec. 31, 2014    
Document Fiscal Year Focus 2014    
Amendment Flag false    
Document Fiscal Period Focus FY    
Entity Registrant Name NCR CORP    
Entity Central Index Key 0000070866    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   168.7  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Current Fiscal Year End Date --12-31    
Entity Public Float     $ 5.9