DERIVATIVES - Financial Statement Impact of Derivatives By Category (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	$ (221)	$ (221)	$ (542)	$ (1,062)
Net Investment Income	866	885	1,800	1,743
Total derivatives
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(826)	(1,581)	(2,040)	(2,418)
Net-FWH and NI modco Derivatives Gains (Losses)	611	1,364	1,511	1,364
Net Investment Income	(13)	2	(7)	5
Interest Credited To Policyholders Account Balances	(5)	8	(23)	(26)
AOCI	35	33	44	30
Investment fees	6	4	11	8
Total embedded derivatives
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(1,016)	(1,784)	(2,570)	(3,358)
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
SCS, SIO, MSO and IUL indexed features
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	(255)	(453)	(854)	(2,027)
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
Funds withheld payable
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	89	599	1,106	599
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)	(850)	(1,930)	(2,822)	(1,930)
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
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	190	217	529	951
Net-FWH and NI modco Derivatives Gains (Losses)	611		1,511
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 swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	1	(9)	14	(19)
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)	(15)	(61)	(43)	(14)
Net-FWH and NI modco Derivatives Gains (Losses)	(74)	5	(210)	5
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)	15	58	115	(96)
Net-FWH and NI modco Derivatives Gains (Losses)	(33)	(158)	(46)	(158)
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)	(10)	(113)	(158)	(716)
Net-FWH and NI modco Derivatives Gains (Losses)	(87)	(591)	(1,050)	(591)
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)	217	361	656	1,858
Net-FWH and NI modco Derivatives Gains (Losses)	770	2,032	2,732	2,032
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)	(18)	(19)	(55)	(62)
Net-FWH and NI modco Derivatives Gains (Losses)	35	76	85	76
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
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
Derivatives: not designated for hedge accounting | Credit default swaps
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 | Currency forwards
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)		0		0
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
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)	0	(14)	1	(11)
Net-FWH and NI modco Derivatives Gains (Losses)	0		0
Net Investment Income	(13)	2	(7)	5
Interest Credited To Policyholders Account Balances	(5)	8	(23)	(26)
AOCI	35	33	44	30
Cash flow hedges: | Derivatives: designated for hedge accounting | Currency swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	0	2	1	10
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	4	2	7	5
Interest Credited To Policyholders Account Balances	(5)	8	(23)	(26)
AOCI	22	3	38	28
Cash flow hedges: | Derivatives: designated for hedge accounting | Interest swaps
Derivatives, Fair Value [Line Items]
Net derivative gains (losses)	0	(16)	0	(21)
Net-FWH and NI modco Derivatives Gains (Losses)	0	0	0	0
Net Investment Income	(17)	0	(14)	0
Interest Credited To Policyholders Account Balances	0	0	0	0
AOCI	$ 13	30	$ 6	2
Cash flow hedges: | Derivatives: not designated for hedge accounting
Derivatives, Fair Value [Line Items]
Net-FWH and NI modco Derivatives Gains (Losses)		$ 1,364		$ 1,364