FAIR VALUE DISCLOSURES - Carrying Values And Fair Values Of Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023
Consolidated Amounts [Abstract]
Policy loans	$ 278	$ 268
Funds withheld receivable	9,755	10,603	$ 10,677	$ 10,654
Policyholders’ liabilities: Investment contracts	28,256	24,963		$ 20,889
Separate Accounts liabilities	6,830	5,754
Carrying Value
Consolidated Amounts [Abstract]
Mortgage loans on real estate	546	294
Policy loans	278	268
Funds withheld receivable	9,784	10,503
Modco receivable	31,045	29,912
Policyholders’ liabilities: Investment contracts	106	110
Separate Accounts liabilities	434	372
Fair Value
Consolidated Amounts [Abstract]
Mortgage loans on real estate	414	297
Policy loans	281	275
Funds withheld receivable	9,784	10,503
Modco receivable	31,045	29,912
Policyholders’ liabilities: Investment contracts	103	108
Separate Accounts liabilities	434	372
Fair Value \| Level 1
Consolidated Amounts [Abstract]
Mortgage loans on real estate	0	0
Policy loans	0	0
Funds withheld receivable	0	0
Modco receivable	0	0
Policyholders’ liabilities: Investment contracts	0	0
Separate Accounts liabilities	0	0
Fair Value \| Level 2
Consolidated Amounts [Abstract]
Mortgage loans on real estate	0	0
Policy loans	0	0
Funds withheld receivable	0	0
Modco receivable	0	0
Policyholders’ liabilities: Investment contracts	0	0
Separate Accounts liabilities	0	0
Fair Value \| Level 3
Consolidated Amounts [Abstract]
Mortgage loans on real estate	414	297
Policy loans	281	275
Funds withheld receivable	9,784	10,503
Modco receivable	31,045	29,912
Policyholders’ liabilities: Investment contracts	103	108
Separate Accounts liabilities	$ 434	$ 372

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- Definition

Modco Receivable, Fair Value Disclosure

+ References

No definition available.

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- Definition

Amount of the reinsurer's funds held on its behalf by the ceding insurer, including funds held in trust, under reinsurance treaties or contracts with the assuming insurer as security for the payment of the obligations thereunder.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(10))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

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- Definition

Amount before allowance of loans made to policy and contract holders using their life insurance contracts' cash value or separate accounts as collateral. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums over and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(e))
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- Definition

Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column G))
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- Definition

Amount of liability due to policyholder for deposit held under long-duration contract issued by insurance entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 25
-Paragraph 14
-Subparagraph (a)
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Amount of liability for variable contract in which all or portion of contract holder's funds is allocated to specific separate account and supported by assets held in separate account.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 80
-Name Accounting Standards Codification
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