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INVESTMENTS - Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Aggregate market value of investments in unrealized loss position	$ 10,979	$ 14,789
Gross unrealized losses on investments in unrealized loss position	793	1,137
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation	111	102
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	682	1,035
Additional contractual commitments	2,900
Cash surrender value of life insurance	1,400	1,300
Variable Interest Entity, Not Primary Beneficiary
Debt Securities, Available-for-Sale [Line Items]
Maximum exposure to loss	5,100	4,800
Commitments to fund investments	2,100
Partnership Interest
Debt Securities, Available-for-Sale [Line Items]
Maximum exposure to loss	$ 3,700	$ 3,400
Investments, Debt Securities Benchmark | Issuer | Issuer One
Debt Securities, Available-for-Sale [Line Items]
Percentage of overall fair value of fixed maturity securities available for sale, less than	2.00%	3.00%
Investments, Debt Securities Benchmark | Issuer | Issuer Two
Debt Securities, Available-for-Sale [Line Items]
Percentage of overall fair value of fixed maturity securities available for sale, less than	0.30%	0.70%
Investment Grade
Debt Securities, Available-for-Sale [Line Items]
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation	$ 108	$ 86
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	659	1,000
Fixed maturities
Debt Securities, Available-for-Sale [Line Items]
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation		102
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	$ 682	$ 1,000

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