DERIVATIVES - Financial Statement Impact of Derivatives By Category (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	$ 941	$ 190	$ (121)	$ 2,168
Net Investment Income	893	788	2,636	2,238
SCS, SIO, MSO and IUL indexed features
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	181	766	0	4,543
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	(1,846)	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Funds Withheld Payable
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(48)	0	551	0
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Modco payable
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	1,099	0	(830)	0
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Total embedded derivatives
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	1,232	766	(2,125)	4,543
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Total derivatives
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	1,103	196	(1,315)	2,181
Net-FWH and NI modco Derivatives Gains (Losses)	(157)	0	1,208	0
Net Investment Income	3	5	8	7
Interest Credited To Policyholders Account Balances	(33)	(36)	(59)	(46)
AOCI	41	205	71	358
Investment fees			13	14
Gmib Reinsurance
Derivatives, Fair Value [Line Items]
Investment fees	5	6
Derivatives: not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(125)		825
Net-FWH and NI modco Derivatives Gains (Losses)	(157)		1,208
Net Investment Income	0		0
Interest Credited To Policyholders Account Balances	0		0
AOCI	0		0
Derivatives: not designated for hedge accounting | Currency swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	28	23	9	41
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Interest swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(55)	(125)	(68)	(428)
Net-FWH and NI modco Derivatives Gains (Losses)	(234)	0	(228)	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Futures
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(48)	34	(145)	548
Net-FWH and NI modco Derivatives Gains (Losses)	90	0	(68)	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	105	591	(612)	3,353
Net-FWH and NI modco Derivatives Gains (Losses)	558	0	(33)	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Options
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(124)	(650)	1,733	(4,381)
Net-FWH and NI modco Derivatives Gains (Losses)	(674)	0	1,358	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Futures
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(31)	(412)	(92)	(1,445)
Net-FWH and NI modco Derivatives Gains (Losses)	103	0	179	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Swaptions
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	0	0	0	0
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Credit default swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	0	0	0	8
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Currency forwards
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	0	0	0	0
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Margin
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	0	0	0	0
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Derivatives: not designated for hedge accounting | Collateral
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	0	0	0	0
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	0	0	0	0
Cash flow hedges: | Derivatives: designated for hedge accounting
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(4)	(31)	(15)	(58)
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	3	5	8	7
Interest Credited To Policyholders Account Balances	(33)	(36)	(59)	(46)
AOCI	41	205	71	358
Cash flow hedges: | Derivatives: designated for hedge accounting | Currency swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(12)	7	(2)	21
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	3	5	8	7
Interest Credited To Policyholders Account Balances	(33)	(36)	(59)	(46)
AOCI	14	111	41	116
Cash flow hedges: | Derivatives: designated for hedge accounting | Interest swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	8	(38)	(13)	(79)
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	0	0	0	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	$ 27	94	$ 30	242
Cash flow hedges: | Derivatives: not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)		(539)		(2,304)
Net-FWH and NI modco Derivatives Gains (Losses)		0		0
Net Investment Income		0		0
Interest Credited To Policyholders Account Balances		0		0
AOCI		$ 0		$ 0