POLICYHOLDER ACCOUNT BALANCES - Reconciliation of Separate Account Liabilities to Separate Account Liability balance (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 136,905	$ 134,717
Retirement \| GMxB Core
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	30,956	30,411	$ 31,414	$ 29,829
Retirement \| EQUI-VEST Individual
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	4,926	4,782	4,920	4,582
Retirement \| Investment Edge
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	5,253	4,885	4,892	4,275
Retirement \| EQUI-VEST Group
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	33,359	30,546	30,686	26,959
Retirement \| Momentum
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	5,244	4,813	4,932	4,421
Corporate & Other \| VUL
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	20,129	18,176	18,110	15,821
Corporate & Other \| GMxB Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	28,951	33,199	$ 34,607	$ 33,794
Other
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 8,087	$ 7,905