Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2020
Aug. 13, 2020
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2  
Entity Registrant Name Social Capital Hedosophia Holdings Corp. III  
Entity Central Index Key 0001801170  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Trading Symbol IPOC  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Ex Transition Period false  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Shell Company true  
Common Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   82,800,000
Common Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   20,700,000