NET INVESTMENT-RELATED GAINS (LOSSES) - INSURANCE - Sales (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AFS fixed maturity securities:
Proceeds from voluntary sales	$ 1,728,403	$ 3,933,957	$ 3,135,328	$ 10,062,242
Gross gains	15,101	1,254	30,565	10,196
Gross losses	$ (70,812)	$ (286,576)	$ (80,856)	$ (532,447)

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
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Amount of realized 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 cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-11

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