POLICYHOLDER ACCOUNT BALANCES - Reconciliation of Separate Account Liabilities to Separate Account Liability balance (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 133,735	$ 127,251
Protection Solutions \| Variable Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	17,007	15,821	$ 14,084	$ 13,187
Legacy Segment \| GMxB Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	34,860	33,794	33,459	32,616
Individual Retirement \| GMxB Core
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	30,820	29,829	28,549	27,772
Individual Retirement \| EQUI-VEST Individual
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	4,826	4,582	4,342	4,161
Individual Retirement \| Investment Edge
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	4,524	4,275	3,979	3,798
Group Retirement \| EQUI-VEST Group
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	29,018	26,959	23,940	22,393
Group Retirement \| Momentum
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	4,706	4,421	$ 4,142	$ 3,885
Other
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 7,974	$ 7,570