DERIVATIVES - Derivatives by Category (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Notional Amount	$ 109,820		$ 119,128
Asset Derivatives	9,574		7,993
Liability Derivatives	20,746		17,291
Net Derivative Gains (Losses)	3,368	$ (1,866)
Futures
Derivatives, Fair Value [Line Items]
Notional Amount	4,680		4,257
Asset Derivatives	0		1
Liability Derivatives	1		1
Net Derivative Gains (Losses)	(193)	(954)
Swaps
Derivatives, Fair Value [Line Items]
Notional Amount	17,846		17,156
Asset Derivatives	77		9
Liability Derivatives	81		281
Net Derivative Gains (Losses)	959	(1,276)
Options
Derivatives, Fair Value [Line Items]
Notional Amount	36,548		47,861
Asset Derivatives	4,346		5,098
Liability Derivatives	2,448		1,752
Net Derivative Gains (Losses)	(1,390)	1,289
Swaps
Derivatives, Fair Value [Line Items]
Notional Amount	24,850		23,793
Asset Derivatives	2,091		468
Liability Derivatives	435		526
Net Derivative Gains (Losses)	3,658	1,596
Futures
Derivatives, Fair Value [Line Items]
Notional Amount	23,993		20,901
Asset Derivatives	0		0
Liability Derivatives	0		0
Net Derivative Gains (Losses)	2,067	27
Swaptions
Derivatives, Fair Value [Line Items]
Notional Amount	0		3,201
Asset Derivatives	0		16
Liability Derivatives	0		0
Net Derivative Gains (Losses)	9	7
Credit default swaps
Derivatives, Fair Value [Line Items]
Notional Amount	1,469		1,400
Asset Derivatives	22		21
Liability Derivatives	15		6
Net Derivative Gains (Losses)	1	9
Foreign currency contracts
Derivatives, Fair Value [Line Items]
Notional Amount	434		559
Asset Derivatives	9		12
Liability Derivatives	8		9
Net Derivative Gains (Losses)	(2)	(27)
Margin
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Asset Derivatives	84		155
Liability Derivatives	77		0
Net Derivative Gains (Losses)	0	0
Collateral
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Asset Derivatives	14		74
Liability Derivatives	3,295		3,016
Net Derivative Gains (Losses)	0	0
GMIB Reinsurance Contracts
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Asset Derivatives	2,931		2,139
Liability Derivatives	0		0
Net Derivative Gains (Losses)	839	177
GMxB Derivative Features’ Liability
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Asset Derivatives	0		0
Liability Derivatives	12,613		8,432
Net Derivative Gains (Losses)	(3,994)	(1,126)
SCS, SIO, MSO and IUL Indexed Features
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Asset Derivatives	0		0
Liability Derivatives	1,773		$ 3,268
Net Derivative Gains (Losses)	$ 1,414	$ (1,588)