POLICYHOLDER ACCOUNT BALANCES - Reconciliation of Separate Account Liabilities to Separate Account Liability balance (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 127,251	$ 114,853
Protection Solutions \| Variable Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	15,821	13,187	$ 16,405	$ 14,155
Legacy Segment \| GMxB Legacy
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	33,794	32,616	44,912	43,747
Individual Retirement \| GMxB Core
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	29,829	27,772	35,288	33,754
Individual Retirement \| EQUI-VEST Individual
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	4,582	4,161	5,583	5,051
Individual Retirement \| Investment Edge
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	4,275	3,798	4,287	3,245
Group Retirement \| EQUI-VEST Group
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	26,959	22,393	27,509	23,530
Group Retirement \| Momentum
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	4,421	3,885	$ 4,975	$ 4,424
Other
Liability for Future Policy Benefit, Activity [Line Items]
Separate Accounts liabilities	$ 7,570	$ 7,041