LIABILITIES FOR FUTURE POLICYHOLDER BENEFITS - Schedule of Liability for Future Policy Benefits, Revenue and Interest Accretion (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premium	$ 303	$ 182
Interest Accretion	169	136
Term
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premium	170	117
Interest Accretion	33	34
Payout - Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premium	109	45
Interest Accretion	79	44
Payout - Non-Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premium	18	16
Interest Accretion	20	19
Group Pension
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premium	0	0
Interest Accretion	9	10
Health
Liability for Future Policy Benefit, Activity [Line Items]
Gross Premium	6	4
Interest Accretion	$ 28	$ 29