DERIVATIVES - Derivatives by Category (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Designated for hedge accounting | Cash flow hedge
Derivatives, Fair Value [Line Items]
Notional Amount	$ 2,211	$ 1,876
Derivative Assets	11	7
Derivative Liabilities	494	437
Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	76,018	80,365
Derivative Assets	11,140	12,351
Derivative Liabilities	10,260	11,293
Currency Swaps | Designated for hedge accounting | Cash flow hedge
Derivatives, Fair Value [Line Items]
Notional Amount	1,256	921
Derivative Assets	11	7
Derivative Liabilities	55	42
Currency Swaps | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	566	541
Derivative Assets	6	1
Derivative Liabilities	0	0
Swaps | Designated for hedge accounting | Cash flow hedge
Derivatives, Fair Value [Line Items]
Notional Amount	955	955
Derivative Assets	0	0
Derivative Liabilities	439	395
Swaps | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	1,885	1,889
Derivative Assets	5	0
Derivative Liabilities	116	46
Futures | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	4,370	2,640
Derivative Assets	2	0
Derivative Liabilities	2	1
Swaps | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	12,415	13,378
Derivative Assets	9	6
Derivative Liabilities	11	4
Options | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	44,415	48,489
Derivative Assets	10,690	12,024
Derivative Liabilities	4,372	5,065
Futures | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	11,521	12,575
Derivative Assets	0	0
Derivative Liabilities	0	0
Swaptions | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	0	0
Derivative Liabilities	0	0
Credit default swaps | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	766	774
Derivative Assets	11	9
Derivative Liabilities	8	10
Currency forwards | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	80	79
Derivative Assets	8	8
Derivative Liabilities	7	7
Margin | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	192	125
Derivative Liabilities	0	0
Collateral | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	217	178
Derivative Liabilities	5,744	6,160
Amount Due from Reinsurers
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	5,056	5,813
Derivative Liabilities	0	0
GMIB Reinsurance Contracts
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	1,582	1,848
Derivative Liabilities	0	0
GMxB Derivative Features’ Liability
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	0	0
Derivative Liabilities	6,924	8,525
SCS, SIO, MSO and IUL Indexed Features
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	0	0
Derivative Liabilities	6,126	6,773
Embedded derivatives
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	6,638	7,661
Derivative Liabilities	13,050	15,298
Derivative instruments including embedded derivative
Derivatives, Fair Value [Line Items]
Notional Amount	78,229	82,241
Derivative Assets	17,789	20,019
Derivative Liabilities	$ 23,804	$ 27,028