STATUTORY INFORMATION (BASED ON NON-GAAP MEASURES) - SCHEDULE OF STATUTORY ACCOUNTING PRACTICES (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Insurance [Abstract]
Statutory capital and surplus	$ 1,849.8	$ 1,799.6
Asset valuation reserve	305.8	332.5
Interest maintenance reserve	395.7	407.9
Total	$ 2,551.3	$ 2,540.0