Cover - shares	6 Months Ended
	Jun. 30, 2021	Aug. 16, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
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	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Central Index Key	0001783879
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Common Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		725,288,102
Common Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		130,155,246