CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Other Comprehensive Income [Abstract]
NET LOSS	$ (662)	$ (253)	$ (339)
OTHER COMPREHENSIVE (LOSS) INCOME:
Unrealized gains on marketable securities	(2)	0	0
COMPREHENSIVE LOSS	(664)	(253)	(339)
LESS COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	0	0	2
COMPREHENSIVE LOSS ATTRIBUTABLE TO OPENDOOR TECHNOLOGIES INC.	$ (664)	$ (253)	$ (341)