v3.22.2.2
Cover - shares
 9 Months Ended
Sep. 30, 2022
Oct. 31, 2022
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2022  
Document Transition Report false  
Entity File Number 001-40691  
Entity Registrant Name Robinhood Markets, Inc.  
Entity Incorporation, State DE  
Entity Tax Identification Number 46-4364776  
Entity Address, Street 85 Willow Rd  
Entity Address, City Menlo Park  
Entity Address, State CA  
Entity Address, Postal Zip Code 94025  
City Area Code 844  
Local Phone Number 428-5411  
Title of each class Class A Common Stock$0.0001 par value per share  
Trading Symbol(s) HOOD  
Name of each exchange on which registered NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0001783879  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3  
Common Class A    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   758,805,255
Common Class B    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   127,955,246