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Cover - USD ($)
shares in Millions, $ in Billions
 12 Months Ended
Dec. 31, 2023
Jan. 31, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Document Transition Report false    
Entity File Number 001-33458    
Entity Registrant Name TERADATA CORPORATION    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 75-3236470    
Entity Address, Address Line One 17095 Via Del Campo    
Entity Address, City or Town San Diego    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92127    
City Area Code 866    
Local Phone Number 548-8348    
Title of 12(b) Security Common Stock, $0.01 par value    
Trading Symbol TDC    
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    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 5.4
Entity Common Stock, Shares Outstanding (in shares)   97.4  
Documents Incorporated by Reference Portions of the registrant’s Notice of Annual Meeting of Stockholders and Proxy Statement, to be filed with the Securities and Exchange Commission pursuant to Regulation 14A within 120 days after registrant’s fiscal year end of December 31, 2023 are incorporated herein by reference.    
Entity Central Index Key 0000816761    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus (i.e. Q1,Q2,Q3,FY) FY    
Amendment Flag false