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Reinsurance (Funds Withheld) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	$ 5,545	$ 5,683
Fixed Maturities [Member]
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	2,390	2,442
Equity securities
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	2	2
Mortgage Loans on Real Estate [Member]
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	452	451
Funds withheld at interest
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	1,486	1,545
Partnership
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	48	35
Short-term Investments [Member]
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	58	30
Accrued Income Receivable
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	32	28
Other Assets
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	0	1
Assets
Reinsurance Funds Withheld Assets [Line Items]
Funds withheld at interest	$ 4,468	$ 4,534

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- Definition

Reinsurance Funds Withheld Assets [Line Items]

+ 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/1943274/2147478777/944-210-S99-1

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