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Cover - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 08, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-39253    
Entity Registrant Name Opendoor Technologies Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 30-1318214    
Entity Address, Address Line One 410 N. Scottsdale Road,    
Entity Address, Address Line Two Suite 1600    
Entity Address, City or Town Tempe,    
Entity Address, State or Province AZ    
Entity Address, Postal Zip Code 85288    
City Area Code 480    
Local Phone Number 618-6760    
Title of 12(b) Security Common stock, $0.0001 par value per share    
Trading Symbol OPEN    
Security Exchange Name NASDAQ    
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    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 1,989,386,879
Entity Common Stock, Shares Outstanding   679,641,720  
Documents Incorporated by Reference
Portions of the registrant’s definitive Proxy Statement relating to its 2024 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission within 120 days after the end of the registrant’s fiscal year ended December 31, 2023, are incorporated by reference into Part III of this Annual Report on Form 10-K.
    
Amendment Flag false    
Entity Central Index Key 0001801169    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY