DERIVATIVES - Derivatives by Category (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Notional Amount	$ 109,045		$ 81,636
Fair Value, Assets Derivatives	7,382		4,936
Net Amount Presented in the Balance Sheets	14,122		9,226
Gains (Losses) Reported In Net Income (Loss)	(1,733)	$ (1,102)
Equity Futures
Derivatives, Fair Value [Line Items]
Notional Amount	6,446		10,411
Fair Value, Assets Derivatives	0		0
Net Amount Presented in the Balance Sheets	0		0
Gains (Losses) Reported In Net Income (Loss)	(930)	(276)
Equity Swaps
Derivatives, Fair Value [Line Items]
Notional Amount	9,474		7,697
Fair Value, Assets Derivatives	18		140
Net Amount Presented in the Balance Sheets	164		168
Gains (Losses) Reported In Net Income (Loss)	(1,260)	(49)
Equity Option
Derivatives, Fair Value [Line Items]
Notional Amount	48,121		21,698
Fair Value, Assets Derivatives	3,915		2,119
Net Amount Presented in the Balance Sheets	1,442		1,163
Gains (Losses) Reported In Net Income (Loss)	1,276	233
Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Notional Amount	26,896		27,003
Fair Value, Assets Derivatives	1,133		632
Net Amount Presented in the Balance Sheets	238		194
Gains (Losses) Reported In Net Income (Loss)	1,597	(515)
Interest Rate Futures
Derivatives, Fair Value [Line Items]
Notional Amount	12,718		11,448
Fair Value, Assets Derivatives	0		0
Net Amount Presented in the Balance Sheets	0		0
Gains (Losses) Reported In Net Income (Loss)	25	109
Swaptions
Derivatives, Fair Value [Line Items]
Notional Amount	2,746
Fair Value, Assets Derivatives	52
Net Amount Presented in the Balance Sheets	0
Gains (Losses) Reported In Net Income (Loss)	7
Credit default swaps
Derivatives, Fair Value [Line Items]
Notional Amount	1,232		1,282
Fair Value, Assets Derivatives	22		17
Net Amount Presented in the Balance Sheets	0		0
Gains (Losses) Reported In Net Income (Loss)	13	(2)
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Notional Amount	1,412		2,097
Fair Value, Assets Derivatives	0		27
Net Amount Presented in the Balance Sheets	15		14
Gains (Losses) Reported In Net Income (Loss)	(27)	13
Collateral
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Fair Value, Assets Derivatives	36		7
Net Amount Presented in the Balance Sheets	0		5
Gains (Losses) Reported In Net Income (Loss)	0	0
Margin
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Fair Value, Assets Derivatives	10		3
Net Amount Presented in the Balance Sheets	3,281		1,564
Gains (Losses) Reported In Net Income (Loss)	0	0
GMIB Reinsurance Contracts
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Fair Value, Assets Derivatives	2,196		1,991
Net Amount Presented in the Balance Sheets	0		0
Gains (Losses) Reported In Net Income (Loss)	217	(1,233)
GMxB Derivative Features’ Liability
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Fair Value, Assets Derivatives	0		0
Net Amount Presented in the Balance Sheets	6,749		5,431
Gains (Losses) Reported In Net Income (Loss)	(1,116)	928
SCS, SIO, MSO and IUL Indexed Features
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Fair Value, Assets Derivatives	0		0
Net Amount Presented in the Balance Sheets	2,233		$ 687
Gains (Losses) Reported In Net Income (Loss)	$ (1,535)	$ (310)