STATUTORY FINANCIAL INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statutory Accounting Practices [Line Items]
Statutory Net Loss	$ (156.5)	$ (160.3)	$ (149.3)
Statutory Capital and Surplus	97.3	113.3
Root Insurance Company
Statutory Accounting Practices [Line Items]
Statutory Net Loss	(125.7)	(126.9)	(123.8)
Statutory Capital and Surplus	77.0	91.5
Root Property & Casualty
Statutory Accounting Practices [Line Items]
Statutory Net Loss	(30.8)	(33.4)	$ (25.5)
Statutory Capital and Surplus	$ 20.3	$ 21.8