FAIR VALUE DISCLOSURES - Unrealized Gains (Losses) For Level 3 Instruments (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Level 3 Assets And Liabilities Held
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Derivative Gains (Losses)	$ (2,920)	$ (899)
OCI	(52)	17
Corporate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Derivative Gains (Losses)	0	0
OCI	(54)	10
States and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Derivative Gains (Losses)	0	0
OCI	2	2
Asset-backed
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Derivative Gains (Losses)		0
OCI		5
Fixed maturities, AFS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Derivative Gains (Losses)	0	0
OCI	(52)	17
GMIB reinsurance contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Derivative Gains (Losses)	1,026	217
OCI	0	0
GMxB derivative features liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net Derivative Gains (Losses)	(3,946)	(1,116)
OCI	$ 0	$ 0