POLICYHOLDER ACCOUNT BALANCES - Reconciliation of Policyholders Account Balances to Policyholders' Account Balance Liability (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2024
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation
Balance (exclusive of Funding Agreements)	126,355	115,437
Funding Agreements	20,090	17,996
Balance, end of period	146,445	133,433
Retirement \| SCS
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	90,076	80,752	$ 71,542	$ 65,267
Retirement \| EQUI-VEST Individual
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	1,738	1,819	1,932	2,037
Retirement \| EQUI-VEST Group
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	10,905	10,968	11,130	11,158
Retirement \| Momentum
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	438	489	498	527
Retirement \| GMxB Core
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	(70)	(52)	(27)	(4)
Corporate & Other \| UL
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	4,868	4,924	4,973	5,065
Corporate & Other \| VUL
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	5,288	5,165	5,061	4,982
Corporate & Other \| GMxB Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	216	222	$ 253	$ 226
Other
Liability for Future Policy Benefit, Activity [Line Items]
Policyholders’ account balance reconciliation	$ 12,896	$ 11,150