MARKET RISK BENEFITS - Changes in the Market Risk Benefits for Deferred Variable Annuities (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Individual Retirement \| GMxB Core
Market Risk Benefit [Roll Forward]
Balance, beginning of period	$ 717	$ 323	$ 496	$ 597
Balance BOP before changes in the instrument specific credit risk	495	71	163	319
Model changes and effect of changes in cash flow assumptions	(7)	0	(7)	0
Actual market movement effect	(173)	(4)	(102)	(163)
Interest accrual	10	15	25	31
Attributed fees accrued	109	111	203	206
Benefit payments	(12)	(12)	(23)	(22)
Actual policyholder behavior different from expected behavior	7	9	20	14
Changes in future economic assumptions	(42)	(72)	105	(265)
Issuances	(2)	0	1	(2)
Balance EOP before changes in the instrument-specific credit risk	385	118	385	118
Changes in the instrument-specific credit risk	268	294	268	294
Balance, end of period	$ 653	$ 412	$ 653	$ 412
Weighted-average age of policyholders (years)	65 years 10 months 24 days	64 years 10 months 24 days	65 years 10 months 24 days	64 years 10 months 24 days
Net amount at risk	$ 2,953	$ 2,867	$ 2,953	$ 2,867
Legacy \| GMxB Legacy
Market Risk Benefit [Roll Forward]
Balance, beginning of period	9,505	11,715	10,508	13,425
Balance BOP before changes in the instrument specific credit risk	9,336	11,319	9,735	13,023
Model changes and effect of changes in cash flow assumptions	8	0	(1,336)	0
Actual market movement effect	(620)	45	(271)	(747)
Interest accrual	96	152	202	313
Attributed fees accrued	161	198	326	398
Benefit payments	(285)	(310)	(565)	(632)
Actual policyholder behavior different from expected behavior	22	0	42	(23)
Changes in future economic assumptions	(232)	(518)	353	(1,446)
Issuances	0	0	0	0
Balance EOP before changes in the instrument-specific credit risk	8,486	10,886	8,486	10,886
Changes in the instrument-specific credit risk	326	546	326	546
Balance, end of period	$ 8,812	$ 11,432	$ 8,812	$ 11,432
Weighted-average age of policyholders (years)	74 years	73 years 3 months 18 days	74 years	73 years 3 months 18 days
Net amount at risk	$ 15,835	$ 19,710	$ 15,835	$ 19,710
Legacy \| Purchased MRB
Market Risk Benefit [Roll Forward]
Balance, beginning of period	(5,973)	(8,343)	(7,372)	(9,448)
Balance BOP before changes in the instrument specific credit risk	(5,957)	(8,312)	(7,368)	(9,409)
Model changes and effect of changes in cash flow assumptions	5	0	1,860	169
Actual market movement effect	264	5	148	397
Interest accrual	(58)	(111)	(122)	(224)
Attributed fees accrued	(39)	(56)	(99)	(136)
Benefit payments	128	162	257	331
Actual policyholder behavior different from expected behavior	(14)	(10)	(14)	(1)
Changes in future economic assumptions	140	346	(193)	897
Issuances	0	0	0	0
Balance EOP before changes in the instrument-specific credit risk	(5,531)	(7,976)	(5,531)	(7,976)
Changes in the instrument-specific credit risk	(10)	(22)	(10)	(22)
Balance, end of period	$ (5,541)	$ (7,998)	$ (5,541)	$ (7,998)
Weighted-average age of policyholders (years)	73 years 4 months 24 days	72 years 10 months 24 days	73 years 4 months 24 days	72 years 10 months 24 days
Net amount at risk	$ 7,099	$ 10,443	$ 7,099	$ 10,443
Legacy \| Net Legacy
Market Risk Benefit [Roll Forward]
Balance, beginning of period	3,532	3,372	3,136	3,977
Balance BOP before changes in the instrument specific credit risk	3,379	3,007	2,367	3,614
Model changes and effect of changes in cash flow assumptions	13	0	524	169
Actual market movement effect	(356)	50	(123)	(350)
Interest accrual	38	41	80	89
Attributed fees accrued	122	142	227	262
Benefit payments	(157)	(148)	(308)	(301)
Actual policyholder behavior different from expected behavior	8	(10)	28	(24)
Changes in future economic assumptions	(92)	(172)	160	(549)
Issuances	0	0	0	0
Balance EOP before changes in the instrument-specific credit risk	2,955	2,910	2,955	2,910
Changes in the instrument-specific credit risk	316	524	316	524
Balance, end of period	$ 3,271	$ 3,434	$ 3,271	$ 3,434

Market Risk Benefit, Increase (Decrease) From Future Economic Assumption

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Weighted-average duration of present value of total expected payment to policyholder in excess of present value of total expected assessment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes benefit classified as market risk benefit or under provisions of Topic 815 on derivative and hedging.

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Amount, before effect of reinsurance and after accumulated increase (decrease) in instrument-specific credit risk, of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, after effect of reinsurance and cumulative increase (decrease) in instrument-specific credit risk, of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
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Amount of cash inflow to contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk from attributed fee collected.

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Amount, before effect of reinsurance and cumulative increase (decrease) in instrument-specific credit risk, of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Amount of cash outflow to policyholder from benefit payment for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Amount of increase (decrease) in contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk from change associated with actual policyholder behavior different from expected.

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Amount of increase (decrease) in contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk from change in future expected policyholder behavior assumption.

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Amount of interest expense for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Amount of increase in contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk from contract issuance.

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Amount of guaranteed benefit in excess of current account balance of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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