Cover Page - USD ($) shares in Millions, $ in Billions	12 Months Ended
	Dec. 31, 2019	Feb. 14, 2020
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Entity File Number	001-00395
Entity Registrant Name	NCR CORPORATION
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
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	NCR
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float	$ 3.7
Entity Common Stock, Shares Outstanding		128.7
Entity Central Index Key	0000070866
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false