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Investments (Securities Pledged) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	$ 23,868	$ 25,049
Total liabilities supported by the pledged collateral	14,067	15,421
Fixed maturities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	21,187	21,339
Separate account assets
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	1,468	2,606
Equity securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	827	719
Other
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	336	355
Securities sold under agreements to repurchase
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total liabilities supported by the pledged collateral	6,056	6,589
Cash collateral for loaned securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total liabilities supported by the pledged collateral	6,477	6,100
Separate account liabilities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total liabilities supported by the pledged collateral	1,507	2,703
Long-term Debt
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total liabilities supported by the pledged collateral	27	29
Trading | Fixed maturities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total securities pledged	$ 50	$ 30

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Financial Instruments Owned and Pledged as Collateral

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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/2003/role/disclosureRef
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481444/860-30-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(11))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1

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