DERIVATIVES - Derivatives by Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Notional Amount	$ 105,657	$ 117,398
Derivative Assets	12,045	8,271
Derivative Liabilities	23,584	17,018
Net Derivative Gains (Losses)	(1,529)	(3,831)
Futures
Derivatives, Fair Value [Line Items]
Notional Amount	4,267	3,510
Derivative Assets	0	0
Derivative Liabilities	0	0
Net Derivative Gains (Losses)	(955)	(1,294)
Swaps
Derivatives, Fair Value [Line Items]
Notional Amount	22,404	17,064
Derivative Assets	6	9
Derivative Liabilities	0	279
Net Derivative Gains (Losses)	(3,353)	(2,405)
Options
Derivatives, Fair Value [Line Items]
Notional Amount	35,786	47,766
Derivative Assets	8,383	5,080
Derivative Liabilities	3,715	1,749
Net Derivative Gains (Losses)	1,663	2,211
Swaps
Derivatives, Fair Value [Line Items]
Notional Amount	23,773	23,700
Derivative Assets	551	467
Derivative Liabilities	653	523
Net Derivative Gains (Losses)	2,823	2,037
Futures
Derivatives, Fair Value [Line Items]
Notional Amount	18,161	20,424
Derivative Assets	0	0
Derivative Liabilities	0	0
Net Derivative Gains (Losses)	1,745	139
Swaptions
Derivatives, Fair Value [Line Items]
Notional Amount	0	3,201
Derivative Assets	0	16
Derivative Liabilities	0	0
Net Derivative Gains (Losses)	9	(35)
Credit default swaps
Derivatives, Fair Value [Line Items]
Notional Amount	919	1,232
Derivative Assets	8	18
Derivative Liabilities	1	0
Net Derivative Gains (Losses)	0	16
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Notional Amount	347	501
Derivative Assets	0	3
Derivative Liabilities	0	0
Net Derivative Gains (Losses)	(2)	(9)
Margin
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	26	140
Derivative Liabilities	66	0
Net Derivative Gains (Losses)	0	0
Collateral
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	212	72
Derivative Liabilities	3,835	3,001
Net Derivative Gains (Losses)	0	0
GMIB Reinsurance Contracts
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	2,859	2,466
Derivative Liabilities	0	0
Net Derivative Gains (Losses)	472	500
GMxB Derivative Features’ Liability
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	0	0
Derivative Liabilities	10,936	8,316
Net Derivative Gains (Losses)	(2,238)	(2,439)
SCS, SIO, MSO and IUL Indexed Features
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets	0	0
Derivative Liabilities	4,378	3,150
Net Derivative Gains (Losses)	(1,693)	$ (2,552)
Investment fees	$ 12