v3.20.2
Cover Page - shares
 9 Months Ended
Sep. 30, 2020
Nov. 06, 2020
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Entity Registrant Name Palantir Technologies Inc.  
Entity Central Index Key 0001321655  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status No  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Incorporation, State or Country Code DE  
Entity Address, City or Town Denver  
Entity Address, State or Province CO  
Title of 12(b) Security Class A Common Stock, par value $0.001 per share  
Trading Symbol PLTR  
Security Exchange Name NYSE  
Common Class A [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   1,471,832,735
Common Class B [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   269,207,902
Common Class F [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   1,005,000