v3.22.4
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Feb. 01, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Document Transition Report false    
Entity File Number 1-1463    
Entity Registrant Name UNION CARBIDE CORPORATION    
Entity Incorporation, State or Country Code NY    
Entity Tax Identification Number 13-1421730    
Entity Address, Address Line One 7501 State Highway 185 North    
Entity Address, City or Town Seadrift    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77983    
City Area Code 361    
Local Phone Number 553-2997    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   935.51  
Entity Central Index Key 0000100790    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Public Float     $ 0
ICFR Auditor Attestation Flag false    
Auditor Firm ID 34    
Auditor Location Midland, Michigan    
Auditor Name DELOITTE & TOUCHE LLP