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			$ 287	$ 176
Transfers into level 3			195	14
Transfers out of level 3			(103)	(104)
Corporate
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			0	0
OCI			(37)	3
Corporate | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	$ 1,685	$ 1,302	1,257	1,186
Net investment income (loss)	0	0	2	3
Investment gains (losses), net	(1)	0	(14)	0
Total realized and unrealized gains (losses)	(1)	0	(12)	3
OCI	18	(6)	(36)	4
Purchases	(155)	(3)	207	219
Sales	(24)	(42)	(114)	(102)
Transfers into level 3	(29)	0	195	14
Transfers out of level 3	0	(31)	(3)	(104)
Ending Balance	1,494	1,220	1,494	1,220
States and political subdivisions
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			0	0
OCI			2	3
States and political subdivisions | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	40	40	39	39
Net investment income (loss)	0	0	0	0
Investment gains (losses), net	0	1	0	1
Total realized and unrealized gains (losses)	0	1	0	1
OCI	(1)	0	1	2
Purchases	0	0	0	0
Sales	0	(2)	(1)	(3)
Transfers into level 3	0	0	0	0
Transfers out of level 3	0	0	0	0
Ending Balance	39	39	39	39
Asset-backed
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			0	0
OCI			0	4
Asset-backed | Level 3
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
Total realized and unrealized gains (losses)	0	0	0	0
OCI	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
Ending Balance	13	532	13	532
Other equity investments | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	132	134	150	165
Net investment income (loss)	7	0
Investment gains (losses), net			14	0
Net derivative gains (losses)	0	0	0	0
Total realized and unrealized gains (losses)	7	0	14	0
OCI	(4)	0	(21)	0
Purchases	21	2	25	10
Sales	(14)	(4)	(26)	(11)
Settlements	0	0	0	0
Change in estimate			0	0
Activity related to consolidated VIEs/VOEs	(3)	0	(4)	(3)
Transfers into level 3	0	0	1	0
Transfers out of level 3	0	(4)	0	(33)
Ending Balance	139	128	139	128
GMIB Reinsurance Contract Asset
Total gains (losses), realized and unrealized, included in:
Investment gains (losses), net			0	0
OCI			0	0
Non-performance Risk	(8)		(33)
GMIB Reinsurance Contract Asset | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	2,931	1,898	2,139	1,734
Net investment income (loss)	0	0
Investment gains (losses), net			0	0
Net derivative gains (losses)	(103)	563	736	740
Total realized and unrealized gains (losses)	(103)	563	736	740
OCI	0	0	0	0
Purchases	11	11	33	33
Sales	(21)	(20)	(58)	(55)
Settlements	0	0	0	0
Change in estimate			(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	2,818	2,452	2,818	2,452
Separate Accounts Assets | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	0	25	0	21
Net investment income (loss)	0	0
Investment gains (losses), net			0	0
Net derivative gains (losses)	0	0	0	0
Total realized and unrealized gains (losses)	0	0	0	0
OCI	0	0	0	0
Purchases	0	(5)	0	3
Sales	0	(1)	0	(1)
Settlements	0	(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)
Ending Balance	0	7	0	7
GMxB Derivative Features Liability
Total gains (losses), realized and unrealized, included in:
Non-performance Risk	(464)		42
GMxB Derivative Features Liability | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	(12,689)	(7,004)	(8,502)	(5,674)
Net investment income (loss)	0	0
Investment gains (losses), net			0	0
Net derivative gains (losses)	579	(2,548)	(3,421)	(3,677)
Total realized and unrealized gains (losses)	579	(2,548)	(3,421)	(3,677)
OCI	0	0	0	0
Purchases	(115)	(102)	(335)	(317)
Sales	21	13	54	27
Settlements	0	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
Ending Balance	(12,204)	(9,641)	(12,204)	(9,641)
Contingent Payment Arrangement | Level 3
Total gains (losses), realized and unrealized, included in:
Beginning Balance	(28)	(25)	(23)	(7)
Net investment income (loss)	0	0
Investment gains (losses), net			0	0
Net derivative gains (losses)	0	0	0	0
Total realized and unrealized gains (losses)	0	0	0	0
OCI	0	0	0	0
Purchases	0	0	(4)	(17)
Sales	0	0	0	0
Settlements	0	0	0	0
Change in estimate			0	0
Activity related to consolidated VIEs/VOEs	(1)	(1)	(2)	(2)
Transfers into level 3	0	0	0	0
Transfers out of level 3	0	0	0	0
Ending Balance	$ (29)	$ (26)	$ (29)	$ (26)