FAIR VALUE DISCLOSURES - Fair Value Measurement Reconciliation for All Levels (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			$ 266	$ (23)
Transfers into level 3			224	14
Transfers out of level 3			(103)	(73)
Corporate
Total gains (losses), realized and unrealized, included in:
OCI			(54)	10
Corporate | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	$ 1,185	$ 1,180	1,257	1,186
Net investment income (loss)	1	2	2	3
Investment gains (losses), net	(11)		(13)	0
Total realized and unrealized gains (losses)	(10)	2	(11)	3
OCI	7	1	(54)	10
Purchases	301	152	362	222
Sales	(45)	(26)	(90)	(60)
Transfers into level 3	224	(3)	224	14
Transfers out of level 3	23	(4)	(3)	(73)
Ending Balance	1,685	1,302	1,685	1,302
States and political subdivisions
Total gains (losses), realized and unrealized, included in:
OCI			2	3
States and political subdivisions | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	36	40	39	39
Net investment income (loss)	0	0	0	0
Investment gains (losses), net	0		0	0
Total realized and unrealized gains (losses)	0	0	0	0
OCI	5	1	2	2
Purchases	0	0	0	0
Sales	(1)	(1)	(1)	(1)
Transfers into level 3	0	0	0	0
Transfers out of level 3	0	0	0	0
Ending Balance	40	40	40	40
Asset-backed
Total gains (losses), realized and unrealized, included in:
OCI			0	5
Asset-backed | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	40	534	100	519
Net investment income (loss)	0	0	0	0
Investment gains (losses), net	0		0	0
Total realized and unrealized gains (losses)	0	0	0	0
OCI	8	1	0	5
Purchases	(48)	(1)	0	10
Sales	0	0	0	0
Transfers into level 3	0	0	0	0
Transfers out of level 3	0	0	(100)	0
Ending Balance	0	534	0	534
Other equity investments | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	140	137	150	165
Net investment income (loss)	0	0
Investment gains (losses), net			7	0
Net derivative gains (losses), excluding non-performance risk	0	0	0	0
Nonperformance risk	0	0	0	0
Total realized and unrealized gains (losses)	0	0	7	0
OCI	(10)	0	(17)	0
Purchases	2	6	4	8
Sales	(1)	(7)	(12)	(7)
Settlements	0	0	0	0
Change in estimate	0		0	0
Activity related to consolidated VIEs/VOEs	0	0	(1)	(3)
Transfers into level 3	1	(2)	1	0
Transfers out of level 3	0	0	0	(29)
Ending Balance	132	134	132	134
GMIB Reinsurance Contract Asset
Total gains (losses), realized and unrealized, included in:
OCI			0	0
GMIB Reinsurance Contract Asset | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	2,823	1,740	2,139	1,732
Net investment income (loss)	0	0
Investment gains (losses), net			0	0
Net derivative gains (losses), excluding non-performance risk	(90)	147	865	136
Nonperformance risk	203	12	(26)	41
Total realized and unrealized gains (losses)	113	159	839	177
OCI	0	0	0	0
Purchases	12	11	22	22
Sales	(17)	(14)	(37)	(35)
Settlements	0	0	0	0
Change in estimate	0		(32)	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
Ending Balance	2,931	1,896	2,931	1,896
Separate Accounts Assets | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	0	23	0	21
Net investment income (loss)	0	0
Investment gains (losses), net			0	0
Net derivative gains (losses), excluding non-performance risk	0	0	0	0
Nonperformance risk	0	0	0	0
Total realized and unrealized gains (losses)	0	0	0	0
OCI	0	0	0	0
Purchases	0	4	0	8
Sales	0	0	0	0
Settlements	0	(2)	0	(3)
Change in estimate	0		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	(1)
Ending Balance	0	25	0	25
GMxB Derivative Features Liability | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	(9,727)	(6,126)	(8,432)	(5,614)
Net investment income (loss)	0	0
Investment gains (losses), net			0	0
Net derivative gains (losses), excluding non-performance risk	(346)	(719)	(4,499)	(656)
Nonperformance risk	(2,450)	0	505	(470)
Total realized and unrealized gains (losses)	(2,796)	(719)	(3,994)	(1,126)
OCI	0	0	0	0
Purchases	(109)	(104)	(220)	(215)
Sales	19	8	33	14
Settlements	0	0	0	0
Change in estimate	0		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
Ending Balance	(12,613)	(6,941)	(12,613)	(6,941)
Contingent Payment Arrangement | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	(24)	(7)	(23)	(7)
Net investment income (loss)	0	0
Investment gains (losses), net			0	0
Net derivative gains (losses), excluding non-performance risk	0	0	0	0
Nonperformance risk	0	0	0	0
Total realized and unrealized gains (losses)	0	0	0	0
OCI	0	0	0	0
Purchases	(4)	(17)	(4)	(17)
Sales	0	0	0	0
Settlements	0	0	0	0
Change in estimate	0		0	0
Activity related to consolidated VIEs/VOEs	(1)	0	(2)	(1)
Transfers into level 3	0	(1)	0	0
Transfers out of level 3	0	0	0	0
Ending Balance	$ (29)	$ (25)	$ (29)	$ (25)