INVESTMENTS - Fixed Maturities Available-for-sale (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Available-For-Sale Securities, Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	$ 934	$ 1,507
Less than 12 months, gross unrealized losses	9	165
12 months or longer, fair value	2,038	673
12 Months or Longer, gross unrealized Losses	295	223
Total fair value	2,972	2,180
Total gross unrealized losses	304	388
Corporate
Available-For-Sale Securities, Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	505	1,446
Less than 12 months, gross unrealized losses	7	159
12 months or longer, fair value	1,900	590
12 Months or Longer, gross unrealized Losses	269	200
Total fair value	2,405	2,036
Total gross unrealized losses	276	359
U.S. Treasury, government and agency
Available-For-Sale Securities, Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	0
Less than 12 months, gross unrealized losses	0
12 months or longer, fair value	8
12 Months or Longer, gross unrealized Losses	0
Total fair value	8
Total gross unrealized losses	0
States and political subdivisions
Available-For-Sale Securities, Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	0	19
Less than 12 months, gross unrealized losses	0	4
12 months or longer, fair value	33	13
12 Months or Longer, gross unrealized Losses	7	5
Total fair value	33	32
Total gross unrealized losses	7	9
Foreign governments
Available-For-Sale Securities, Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	7
Less than 12 months, gross unrealized losses	1
12 months or longer, fair value	4
12 Months or Longer, gross unrealized Losses	0
Total fair value	11
Total gross unrealized losses	1
Residential mortgage-backed
Available-For-Sale Securities, Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	103	2
Less than 12 months, gross unrealized losses	0	0
12 months or longer, fair value	9	4
12 Months or Longer, gross unrealized Losses	4	2
Total fair value	112	6
Total gross unrealized losses	4	2
Asset-backed
Available-For-Sale Securities, Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	290	35
Less than 12 months, gross unrealized losses	1	1
12 months or longer, fair value	23	6
12 Months or Longer, gross unrealized Losses	1	1
Total fair value	313	41
Total gross unrealized losses	2	2
Commercial mortgage-backed
Available-For-Sale Securities, Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	29	5
Less than 12 months, gross unrealized losses	0	1
12 months or longer, fair value	61	60
12 Months or Longer, gross unrealized Losses	14	15
Total fair value	90	65
Total gross unrealized losses	$ 14	$ 16