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FAIR VALUE - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 27,740,000,000	$ 22,236,000,000
Transfer in and/or (out) of Level 3	0	779,000,000
Other assets	941,000,000	930,000,000
Fixed maturity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	2,000,000,000	1,700,000,000
Fair Value | Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other assets	$ 274,000,000	$ 292,000,000

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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