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DAC AND POLICYHOLDER BONUS INTEREST CREDITS - Changes in Deferred Asset for Policyholder Bonus Interest Credits (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Changes in the deferred asset for contractholder bonus interest credits      
Balance, beginning of year $ 430 $ 448 $ 472
Amortization charged to income (26) (18) (24)
Balance, End of Year $ 404 $ 430 $ 448