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FAIR VALUE - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 25,159	$ 22,236
Fair value of public equity portfolio	5,600	2,700
Other invested assets	1,029	930
Fair Value | Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other invested assets	284	292
Fixed maturities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 1,900	$ 1,700

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