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Cover - USD ($)
 12 Months Ended
Dec. 31, 2022
Feb. 16, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
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 85281    
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    
Entity Shell Company false    
Entity Public Float     $ 2,431,521,293
Entity Common Stock, Shares Outstanding   642,560,229  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s definitive Proxy Statement relating to its 2023 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days after December 31, 2022 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 2022    
Document Fiscal Period Focus FY