FAIR VALUE DISCLOSURES - Fair Value Measurement Reconciliation For All Levels (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			$ 262	$ 181
Transfers into level 3			189	14
Transfers out of Level 3			(103)	(104)
Corporate
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			0	0
Other comprehensive income (loss)			(37)	3
States and political subdivisions
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			0	0
Other comprehensive income (loss)			2	3
Asset- backed
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net				0
Other comprehensive income (loss)				4
GMIB Reinsurance Contract Asset
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			0	0
Other comprehensive income (loss)			0	0
Nonperformance risk	$ 6		(50)
GMxB Derivative Features Liability
Total gains (losses), realized and unrealized, included in:
Nonperformance risk	(458)		35
Level 3 | Corporate
Total gains (losses), realized and unrealized, included in:
Beginning Balance	1,652	$ 1,290	1,246	1,174
Net investment income (loss)	0	0	2	3
Investment gains (losses), net	(1)	0	(14)	0
Subtotal	(1)	0	(12)	3
Other comprehensive income (loss)	18	(7)	(36)	3
Purchases	(138)	(2)	207	219
Sales	(22)	(42)	(112)	(101)
Transfers into level 3	(30)	0	189	14
Transfers out of Level 3	0	(31)	(3)	(104)
Closing Balance	1,479	1,208	1,479	1,208
Level 3 | States and political subdivisions
Total gains (losses), realized and unrealized, included in:
Beginning Balance	40	39	39	38
Net investment income (loss)	0	0	0	0
Investment gains (losses), net	0	0	0	0
Subtotal	0	0	0	0
Other comprehensive income (loss)	(1)	1	1	3
Purchases	0	0	0	0
Sales	0	(1)	(1)	(2)
Transfers into level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Closing Balance	39	39	39	39
Level 3 | Asset- backed
Total gains (losses), realized and unrealized, included in:
Beginning Balance	0	534	100	519
Net investment income (loss)	0	0	0	0
Investment gains (losses), net	0	0	0	0
Subtotal	0	0	0	0
Other comprehensive income (loss)	0	0	0	5
Purchases	13	71	13	81
Sales	0	(73)	0	(73)
Transfers into level 3	0	0	0	0
Transfers out of Level 3	0	0	(100)	0
Closing Balance	13	532	13	532
Level 3 | Other equity investments
Total gains (losses), realized and unrealized, included in:
Beginning Balance	16	16	16	48
Net investment income (loss)	0	0	0	0
Net derivative gain (losses)	0	0	0	0
Subtotal	0	0	0	0
Other comprehensive income (loss)	0	0	0	0
Purchases	3	0	4	0
Sales	0	0	0	0
Settlements		0	0	0
Change in estimate	0		0
Activity related to consolidated VIEs/VOEs	(3)	0	(4)	(3)
Transfers into level 3	0	0	0	0
Transfers out of Level 3	0	0	0	(29)
Closing Balance	16	16	16	16
Level 3 | GMIB Reinsurance Contract Asset
Total gains (losses), realized and unrealized, included in:
Beginning Balance	3,433	2,198	2,466	1,993
Net investment income (loss)	0	0	0	0
Net derivative gain (losses)	(177)	664	849	881
Subtotal	(177)	664	849	881
Other comprehensive income (loss)	0	0		0
Purchases	11	11	34	34
Sales	(21)	(20)	(58)	(55)
Settlements		0	0	0
Change in estimate	1		(44)
Activity related to consolidated VIEs/VOEs	0	0	0	0
Transfers into level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Closing Balance	3,247	2,853	3,247	2,853
Level 3 | Separate Accounts Assets
Total gains (losses), realized and unrealized, included in:
Beginning Balance	0	25	0	21
Net investment income (loss)	0	0	0	0
Net derivative gain (losses)	0	0	0	0
Subtotal	0	0	0	0
Other comprehensive income (loss)	0	0		0
Purchases	0	(5)	0	3
Sales	0	(1)	0	(1)
Settlements		(1)	0	(4)
Change in estimate	0		0
Activity related to consolidated VIEs/VOEs	0	0	0	0
Transfers into level 3	0	0	0	0
Transfers out of Level 3	0	(11)	0	(12)
Closing Balance	0	7	0	7
Level 3 | GMxB Derivative Features Liability
Total gains (losses), realized and unrealized, included in:
Beginning Balance	(12,458)	(6,813)	(8,316)	(5,491)
Net investment income (loss)	0	0	0	0
Net derivative gain (losses)	570	(2,535)	(3,382)	(3,656)
Subtotal	570	(2,535)	(3,382)	(3,656)
Other comprehensive income (loss)	0	0		0
Purchases	(113)	(100)	(328)	(309)
Sales	16	12	41	20
Settlements		0	0	0
Change in estimate	0		0
Activity related to consolidated VIEs/VOEs	0	0	0	0
Transfers into level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Closing Balance	$ (11,985)	$ (9,436)	$ (11,985)	$ (9,436)