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REINSURANCE - Narrative (Details) - USD ($) $ in Millions				9 Months Ended
		Jul. 31, 2025	Apr. 01, 2025	Sep. 30, 2025	Dec. 31, 2024
Reinsurance Retention [Line Items]
Reinsurance per life for single lives, amount retained				$ 25
Reinsurance per life for joint lives, amount retained				$ 30
Reinsurance retention policy, percentage of excess reinsured				100.00%
Cash and cash equivalents	[1]			$ 13,604	$ 6,964
RGA Reinsurance Company
Reinsurance Retention [Line Items]
Percentage of loans receivable, fair value disclosure		75.00%	75.00%
Fixed maturity securities				266
Options				29
Cash and cash equivalents				$ 3
[1] See Note 2 of the Notes to these Consolidated Financial Statements for details of balances with VIEs.

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Fixed Maturity Securities

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Non-Insulated Modco, Options

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Percentage Of Loans Receivable, Fair Value Disclosure

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Reinsurance Retention Policy, Per Life, Joint Lives, Amount Retained

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Reinsurance Retention Policy, Per Life, Single Lives, Amount Retained

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Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483467/210-10-45-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-4

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Percentage of risk ceded to reinsurer in excess of risk undertaken originally by insurer that is not ceded to reinsurer.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479838/944-20-50-3

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479838/944-20-50-3

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