Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (270,594)	$ (609,552)	$ (571,426)
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	11,024	(6,044)	(4,550)
Comprehensive loss	(259,570)	(615,596)	(575,976)
Comprehensive income (loss) attributable to noncontrolling interests	134	(3,277)	1,180
Comprehensive loss attributable to Oscar Health, Inc.	$ (259,704)	$ (612,319)	$ (577,156)