NET INVESTMENT-RELATED GAINS (LOSSES) - INSURANCE - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Investment Income [Line Items]
Credit loss allowances on mortgage and other loan receivables	$ (12,298)	$ 2,337	$ (38,383)	$ (181,304)
Insurance
Net Investment Income [Line Items]
Realized gains (losses) on equity investments	0	22,882	0	25,125
Realized gains (losses) on available-for-sale fixed maturity debt securities	(287,373)	(27,634)	(530,723)	(73,274)
Credit loss allowances on available-for-sale securities	(6,442)	46,447	(17,044)	25,096
Credit loss allowances on mortgage and other loan receivables	(12,298)	2,337	(38,383)	(181,304)
Allowances on unfunded commitments	(10,168)	2,914	(3,378)	(11,695)
Unrealized gains (losses) on fixed maturity securities classified as trading	(989,678)	319,942	(2,028,124)	2,890
Unrealized gains (losses) on investments recognized under the fair-value option	(38,435)	59,587	(40,928)	47,421
Unrealized gains (losses) on real estate investments recognized at fair value under investment company accounting	45,396	10,267	123,088	10,267
Net gains (losses) on derivative instruments	855,366	(119,226)	1,715,100	29,306
Other realized gains (losses)	10,741	13,513	19,608	8,519
Net investment-related gains (losses)	(426,326)	326,558	(795,006)	(129,144)
Insurance \| Payable Portfolio Segment
Net Investment Income [Line Items]
Realized gains (losses) on funds withheld at interest, payable portfolio	28,727	(11,734)	2,340	(19,112)
Insurance \| Receivable Portfolio Segment
Net Investment Income [Line Items]
Realized gains (losses) on funds withheld at interest, payable portfolio	$ (22,162)	$ 7,263	$ 3,438	$ 7,617

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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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 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 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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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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