FAIR VALUE - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 14,202	$ 12,671
Fair value of public equity portfolio	4,000	2,700
Other invested assets, at fair value	1,474	1,472
Fair Value | Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other invested assets, at fair value	293	292
Fixed maturities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	1,800	1,700
Asset Backed Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 4,676	$ 3,951