v3.22.0.1
Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2021
Feb. 17, 2022
Jun. 30, 2021
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Document Annual Report true    
Document Transition Report false    
Entity Registrant Name Palantir Technologies Inc.    
Entity Central Index Key 0001321655    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company 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    
Entity File Number 001-39540    
Entity Address, Address Line One 1555 Blake Street, Suite 250    
Entity Address, Postal Zip Code 80202    
Entity Tax Identification Number 68-0551851    
City Area Code 720    
Local Phone Number 358-3679    
Entity Public Float     $ 45.4
Auditor Name Ernst & Young LLP    
Auditor Firm ID 42    
Auditor Location San Jose, California    
Common Class A [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   1,929,183,497  
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   99,929,842  
Common Class F [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   1,005,000