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NET INVESTMENT-RELATED GAINS (LOSSES) - INSURANCE - Sales (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
AFS fixed maturity securities:    
Proceeds from voluntary sales $ 12,050,106 $ 17,946,293
Gross gains 21,567 45,532
Gross losses $ (569,706) $ (187,619)