MARKET RISK BENEFITS - Changes in the Market Risk Benefits for Deferred Variable Annuities (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Market Risk Benefit [Roll Forward]
Benefit payments	$ 7	$ 172
GMxB Core \| Individual Retirement
Market Risk Benefit [Roll Forward]
Balance, beginning of year	578	539
Beginning balance before changes in the instrument specific credit risk	324	538
Model changes and effect of changes in cash flow assumptions	0	0
Actual market movement effect	(151)	(206)
Interest accrual	15	18
Attributed fees accrued	92	94
Benefit payments	(10)	(12)
Actual policyholder behavior different from expected behavior	3	5
Changes in future economic assumptions	(176)	123
Issuances	0	0
Ending balance before changes in the instrument-specific credit risk	97	560
Changes in the instrument-specific credit risk	231	(227)
Balance, end of year	$ 328	$ 333
Weighted-average age of policyholders (years)	64 years 9 months 18 days	63 years 9 months 18 days
Net amount at risk	$ 2,762	$ 3,278
Purchased MRB Core \| Individual Retirement
Market Risk Benefit [Roll Forward]
Balance, beginning of year	(1,180)
Beginning balance before changes in the instrument specific credit risk	(1,266)
Model changes and effect of changes in cash flow assumptions	0
Actual market movement effect	147
Interest accrual	(4)
Attributed fees accrued	(83)
Benefit payments	10
Actual policyholder behavior different from expected behavior	1
Changes in future economic assumptions	203
Issuances	0
Ending balance before changes in the instrument-specific credit risk	(992)
Changes in the instrument-specific credit risk	92
Balance, end of year	$ (900)
Weighted-average age of policyholders (years)	65 years 1 month 6 days
Net amount at risk	$ 2,729
Net GMxB Core \| Individual Retirement
Market Risk Benefit [Roll Forward]
Balance, beginning of year	(602)
Beginning balance before changes in the instrument specific credit risk	(942)
Model changes and effect of changes in cash flow assumptions	0
Actual market movement effect	(4)
Interest accrual	11
Attributed fees accrued	9
Benefit payments	0
Actual policyholder behavior different from expected behavior	4
Changes in future economic assumptions	27
Issuances	0
Ending balance before changes in the instrument-specific credit risk	(895)
Changes in the instrument-specific credit risk	323
Balance, end of year	(572)
GMxB Legacy \| Legacy Segment
Market Risk Benefit [Roll Forward]
Balance, beginning of year	13,410	14,699
Beginning balance before changes in the instrument specific credit risk	13,020	15,314
Model changes and effect of changes in cash flow assumptions	0	0
Actual market movement effect	(788)	(744)
Interest accrual	161	197
Attributed fees accrued	200	210
Benefit payments	(321)	(342)
Actual policyholder behavior different from expected behavior	(23)	21
Changes in future economic assumptions	(923)	943
Issuances	0	0
Ending balance before changes in the instrument-specific credit risk	11,326	15,599
Changes in the instrument-specific credit risk	375	(1,517)
Balance, end of year	$ 11,701	$ 14,082
Weighted-average age of policyholders (years)	73 years 2 months 12 days	72 years 9 months 18 days
Net amount at risk	$ 19,673	$ 21,472
Purchased MRB Legacy \| Legacy Segment
Market Risk Benefit [Roll Forward]
Balance, beginning of year	(15,519)	(10,493)
Beginning balance before changes in the instrument specific credit risk	(15,543)	(10,439)
Model changes and effect of changes in cash flow assumptions	1	0
Actual market movement effect	746	393
Interest accrual	(168)	(155)
Attributed fees accrued	(154)	(83)
Benefit payments	314	185
Actual policyholder behavior different from expected behavior	13	(17)
Changes in future economic assumptions	972	(532)
Issuances	0	0
Ending balance before changes in the instrument-specific credit risk	(13,819)	(10,648)
Changes in the instrument-specific credit risk	36	(98)
Balance, end of year	$ (13,783)	$ (10,746)
Weighted-average age of policyholders (years)	73 years 6 months	67 years 8 months 12 days
Net amount at risk	$ 19,360	$ 10,036
Net GMxB Legacy \| Legacy Segment
Market Risk Benefit [Roll Forward]
Balance, beginning of year	(2,109)	4,206
Beginning balance before changes in the instrument specific credit risk	(2,523)	4,875
Model changes and effect of changes in cash flow assumptions	1	0
Actual market movement effect	(42)	(351)
Interest accrual	(7)	42
Attributed fees accrued	46	126
Benefit payments	(7)	(157)
Actual policyholder behavior different from expected behavior	(10)	4
Changes in future economic assumptions	49	412
Issuances	0	0
Ending balance before changes in the instrument-specific credit risk	(2,493)	4,952
Changes in the instrument-specific credit risk	411	(1,616)
Balance, end of year	$ (2,082)	$ 3,336

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(5)
-Publisher FASB
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 29G
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480046/944-40-55-29G

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-Name Accounting Standards Codification
-Section 50
-Paragraph 7B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480081/944-40-50-7B

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
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-URI https://asc.fasb.org//1943274/2147480112/944-40-45-3

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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/2003/role/exampleRef
-Topic 944
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-Name Accounting Standards Codification
-Section 55
-Paragraph 29G
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480046/944-40-55-29G

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
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-Section 65
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-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
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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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