v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2010
Feb. 15, 2011
Jun. 30, 2010
Document and Entity Information      
Document Type 10-K    
Amendment Flag false    
Document Fiscal Year Focus 2010    
Document Period End Date Dec. 31, 2010    
Document Fiscal Period Focus FY    
Trading Symbol NCR    
Entity Registrant Name NCR CORP    
Entity Central Index Key 0000070866    
Current Fiscal Year End Date --12-31    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Entity Common Stock, Shares Outstanding   160,100,000  
Entity Public Float     $ 1,900,000,000