POLICYHOLDER ACCOUNT BALANCES - Reconciliation of Separate Account Liabilities to Separate Account Liability balance (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 139,161	$ 136,544
Retirement \| GMxB Core
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	30,027	30,720	$ 30,956	$ 30,411
Retirement \| EQUI-VEST Individual
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	4,838	4,836	4,926	4,782
Retirement \| Investment Edge
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	5,709	5,312	5,253	4,885
Retirement \| EQUI-VEST Group
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	35,711	33,714	33,359	30,546
Retirement \| Momentum
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	5,297	5,174	5,244	4,813
Corporate & Other \| VUL
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	21,862	20,383	20,129	18,176
Corporate & Other \| GMxB Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	26,961	28,209	$ 28,951	$ 33,199
Other
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 8,756	$ 8,196