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	$ 108,012		$ 117,398
Derivative Assets	10,007		8,271
Derivative Liabilities	20,394		16,948
Net Derivative Gains (Losses)	3,636	$ (1,733)
Futures
Derivatives, Fair Value [Line Items]
Notional Amount	3,848		3,510
Derivative Assets	0		0
Derivative Liabilities	0		0
Net Derivative Gains (Losses)	(126)	(930)
Swaps
Derivatives, Fair Value [Line Items]
Notional Amount	17,760		17,064
Derivative Assets	77		9
Derivative Liabilities	79		279
Net Derivative Gains (Losses)	963	(1,260)
Equity Option
Derivatives, Fair Value [Line Items]
Notional Amount	36,469		47,766
Derivative Assets	4,333		5,080
Derivative Liabilities	2,442		1,749
Net Derivative Gains (Losses)	(1,387)	1,276
Swaps
Derivatives, Fair Value [Line Items]
Notional Amount	24,771		23,700
Derivative Assets	2,089		467
Derivative Liabilities	432		523
Net Derivative Gains (Losses)	3,658	1,597
Futures
Derivatives, Fair Value [Line Items]
Notional Amount	23,565		20,424
Derivative Assets	0		0
Derivative Liabilities	0		0
Net Derivative Gains (Losses)	2,072	25
Swaptions
Derivatives, Fair Value [Line Items]
Notional Amount	0		3,201
Derivative Assets	0		16
Derivative Liabilities	0		0
Net Derivative Gains (Losses)	9	7
Credit default swaps
Derivatives, Fair Value [Line Items]
Notional Amount	1,252		1,232
Derivative Assets	10		18
Derivative Liabilities	4		0
Net Derivative Gains (Losses)	(7)	13
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Notional Amount	347		501
Derivative Assets	0		3
Derivative Liabilities	0		0
Net Derivative Gains (Losses)	(3)	(27)
Collateral
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Derivative Assets	51		140
Derivative Liabilities	77		0
Net Derivative Gains (Losses)	0	0
Margin
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Derivative Assets	14		72
Derivative Liabilities	3,288		3,001
Net Derivative Gains (Losses)	0	0
GMIB Reinsurance Contracts
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Derivative Assets	3,433		2,466
Derivative Liabilities	0		0
Net Derivative Gains (Losses)	1,026	217
GMxB Derivative Features’ Liability
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Derivative Assets	0		0
Derivative Liabilities	12,382		8,246
Net Derivative Gains (Losses)	(3,946)	(1,116)
SCS, SIO, MSO and IUL Indexed Features
Derivatives, Fair Value [Line Items]
Notional Amount	0		0
Derivative Assets	0		0
Derivative Liabilities	1,690		$ 3,150
Net Derivative Gains (Losses)	1,377	$ (1,535)
Investment fees	$ 6