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Life Policy And Investment Contract Reservess (Reserve In Addition To The Account Balance Based On Expected No-Lapse Guarantee Benefits And Expected Policy Assessments) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	$ 2,960	$ 3,068
Life Policy Reserves
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	1,554	1,597
Life Policy Reserves | Term Life Insurance
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	1,051	1,066
Life Policy Reserves | Whole Life Insurance
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	405	434
Life Policy Reserves | Long-Duration Insurance, Other
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	98	97
Investment contract reserves
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	1,406	1,471
Investment contract reserves | Deferred Fixed Annuity
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	595	656
Investment contract reserves | Universal Life
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	586	585
Investment contract reserves | Structured Settlement Annuity
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	116	123
Investment contract reserves | Long-Duration Insurance, Other
Liability for Future Policy Benefit, by Product Segment
Life policy and investment contract reserves	$ 109	$ 107

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+ References

No definition available.

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- Definition

The aggregate amount of policy reserves (provided for future obligations including unpaid claims and claims adjustment expenses) and policy benefits (liability for future policy benefits) as of the balance sheet date; grouped amount of all the liabilities associated with the company's insurance policies.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (cc)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480081/944-40-50-3

Reference 3: 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)(13)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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