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Reinsurance - Reinsurance Recoverables (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Ceded Credit Risk [Line Items]
Total reinsurance recoverables	$ 1,998	$ 2,250
Hartford Life and Accident Insurance Company
Ceded Credit Risk [Line Items]
Total reinsurance recoverables	1,314	1,549
Lincoln Life & Annuity Company of New York
Ceded Credit Risk [Line Items]
Total reinsurance recoverables	480	385
VOYA Retirement Insurance and Annuity Company
Ceded Credit Risk [Line Items]
Total reinsurance recoverables	0	159
Fresenius Medical Care Reinsurance Company (Cayman) Ltd.
Ceded Credit Risk [Line Items]
Total reinsurance recoverables	54	102
Resolution Life Group Holdings Ltd.
Ceded Credit Risk [Line Items]
Total reinsurance recoverables	35	0
All Other
Ceded Credit Risk [Line Items]
Total reinsurance recoverables	$ 115	$ 55

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 825
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479383/944-825-50-1B

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- Definition

Amount, after valuation allowance, recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, policy benefits and policy reserves. Excludes premiums paid under reinsurance contracts.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 310
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479584/944-310-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479838/944-20-50-5

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479616/944-310-45-5

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479616/944-310-45-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 825
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479383/944-825-50-1B

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