Document and Entity Information
3 Months Ended
Mar. 31, 2018
Document and Entity Information  
Entity Registrant Name UNION CARBIDE CORP /NEW/
Entity Central Index Key 0000100790
Current Fiscal Year End Date --12-31
Entity Filer Category Non-accelerated Filer
Document Type 10-Q
Document Period End Date Mar. 31, 2018
Document Fiscal Year Focus 2018
Document Fiscal Period Focus Q1
Amendment Flag false
Entity Common Stock, Shares Outstanding 935.51