POLICYHOLDER ACCOUNT BALANCES - Reconciliation of Separate Account Liabilities to Separate Account Liability balance (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2024
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 143,006	$ 136,544
Retirement \| GMxB Core
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	31,314	30,720	$ 30,057	$ 30,411
Retirement \| EQUI-VEST Individual
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	5,004	4,836	4,756	4,782
Retirement \| Investment Edge
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	5,655	5,312	5,072	4,885
Retirement \| EQUI-VEST Group
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	36,618	33,714	31,714	30,546
Retirement \| Momentum
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	5,436	5,174	5,008	4,813
Corporate & Other \| VUL
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	22,066	20,383	18,968	18,176
Corporate & Other \| GMxB Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	28,369	28,209	$ 28,275	$ 33,199
Other
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 8,544	$ 8,196