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	74,930	79,394
Derivative Assets	11,079	12,303
Derivative Liabilities	10,231	11,261
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	1,876	1,876
Derivative Assets	5	0
Derivative Liabilities	115	45
Futures | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	3,831	2,213
Derivative Assets	0	0
Derivative Liabilities	0	0
Swaps | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	12,350	13,310
Derivative Assets	5	5
Derivative Liabilities	3	0
Options | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	44,305	48,380
Derivative Assets	10,685	12,015
Derivative Liabilities	4,369	5,059
Futures | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	11,395	12,455
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	607	619
Derivative Assets	1	2
Derivative Liabilities	3	3
Currency forwards | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	0	0
Derivative Liabilities	0	0
Margin | Not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	160	102
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	5,741	6,154
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	1,742	2,068
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	6,018	6,641
Embedded derivatives
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	6,798	7,881
Derivative Liabilities	12,942	15,166
Derivative instruments including embedded derivative
Derivatives, Fair Value [Line Items]
Notional Amount	77,141	81,270
Derivative Assets	17,888	20,191
Derivative Liabilities	$ 23,667	$ 26,864