INVESTMENTS - Fixed Maturities Available-for-sale (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Available For Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	$ 2,061	$ 288
Less than 12 months, gross unrealized losses	261	5
12 months or longer, fair value	91	113
12 Months or Longer, gross unrealized Losses	33	6
Fair value	2,152	401
Gross unrealized losses	294	11
Corporate
Available For Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	1,906	243
Less than 12 months, gross unrealized losses	239	4
12 months or longer, fair value	91	111
12 Months or Longer, gross unrealized Losses	33	6
Fair value	1,997	354
Gross unrealized losses	272	10
U.S. Treasury, government and agency
Available For Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	9	45
Less than 12 months, gross unrealized losses	0	1
12 months or longer, fair value	0	2
12 Months or Longer, gross unrealized Losses	0	0
Fair value	9	47
Gross unrealized losses	0	1
States and political subdivisions
Available For Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	29	0
Less than 12 months, gross unrealized losses	5	0
12 months or longer, fair value	0	0
12 Months or Longer, gross unrealized Losses	0	0
Fair value	29	0
Gross unrealized losses	5	0
Asset-backed
Available For Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	48	0
Less than 12 months, gross unrealized losses	5	0
12 months or longer, fair value	0	0
12 Months or Longer, gross unrealized Losses	0	0
Fair value	48	0
Gross unrealized losses	5	0
Commercial mortgage-backed
Available For Sale Securities Continuous Unrealized Loss Position [Line Items]
Less than 12 months, fair value	69	0
Less than 12 months, gross unrealized losses	12	0
12 months or longer, fair value	0	0
12 Months or Longer, gross unrealized Losses	0	0
Fair value	69	0
Gross unrealized losses	$ 12	$ 0