NET INVESTMENT-RELATED GAINS (LOSSES) - INSURANCE - Net Investment Gains (Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Investment Income [Line Items]
Credit loss allowances on mortgage and other loan receivables	$ (210,704)	$ (369,296)	$ (252,979)
Insurance
Net Investment Income [Line Items]
Realized losses on available-for-sale fixed maturity debt securities	(64,140)	(559,987)	(201,411)
Credit loss allowances on available-for-sale securities	(168,899)	(57,411)	25,316
Credit loss allowances on mortgage and other loan receivables	(210,704)	(369,296)	(252,979)
Allowances on unfunded commitments	6,321	(34,112)	(21,675)
Impairment of available-for-sale fixed maturity debt securities due to intent to sell	(26,741)	0	0
Unrealized gains (losses) on fixed maturity securities classified as trading	1,031,227	(2,603,874)	(118,714)
Unrealized (losses) gains on investments recognized under the fair-value option	(110,371)	60,237	39,758
Unrealized (losses) gains on real estate investments recognized at fair value under investment company accounting	(115,840)	(42,870)	35,418
Net (losses) gains on derivative instruments	(680,717)	2,346,747	222,745
Realized gains on equity investments	0	0	511,247
Other realized gains (losses)	88,368	(92,822)	(18,355)
Net investment-related gains (losses)	(235,262)	(1,318,490)	203,753
Insurance \| Payable Portfolio Segment
Net Investment Income [Line Items]
Realized gains (losses) on funds withheld at interest, payable portfolio	25,427	38,074	(30,015)
Insurance \| Receivable Portfolio Segment
Net Investment Income [Line Items]
Realized gains (losses) on funds withheld at interest, payable portfolio	$ (9,193)	$ (3,176)	$ 12,418

Funds Withheld Receivable At Interest, Realized Gain (Loss)

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Investments Not Supporting Asset-Liability Matching, Realized Gain (Loss)

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Unrealized Gain (Loss) On Investments, Fair Value Option

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Unrealized Gain (Loss) On Real Estate Investments, Fair Value Option

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Amount, excluding accrued interest, of increase (decrease) in allowance for credit loss 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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Amount of realized gain (loss) on 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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Amount of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

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Amount of realized and unrealized gain (loss) on investment.

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Amount of gain (loss) included in earnings for investments classified as other.

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Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

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Amount of other-than-temporary impairment (OTTI) on investment in debt security, recognized in earnings.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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