Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information - shares
3 Months Ended
Dec. 31, 2020
Feb. 16, 2021
Document Information Line Items    
Entity Registrant Name UNION ACQUISITION CORP. II  
Document Type 10-Q  
Current Fiscal Year End Date --09-30  
Entity Common Stock, Shares Outstanding   25,000,000
Amendment Flag false  
Entity Central Index Key 0001766146  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Document Period End Date Dec. 31, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Shell Company true  
Entity Ex Transition Period false  
Entity File Number 001-38563  
Entity Incorporation, State or Country Code E9  
Entity Interactive Data Current Yes