POLICYHOLDER ACCOUNT BALANCES - Reconciliation of Policyholders Account Balances to Policyholders' Account Balance Liability (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation
Balance (exclusive of Funding Agreements)	129,989	115,437
Funding Agreements	20,494	17,996
Balance, end of period	150,483	133,433
Retirement \| SCS
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	93,364	80,752	$ 77,232	$ 65,267
Retirement \| EQUI-VEST Individual
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	1,696	1,819	1,887	2,037
Retirement \| EQUI-VEST Group
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	10,861	10,968	11,076	11,158
Retirement \| Momentum
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	419	489	504	527
Retirement \| GMxB Core
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	(62)	(52)	(37)	(4)
Corporate & Other \| UL
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	4,839	4,924	4,950	5,065
Corporate & Other \| VUL
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	5,309	5,165	5,115	4,982
Corporate & Other \| GMxB Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	198	222	$ 232	$ 226
Other
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	$ 13,365	$ 11,150