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Separate Accounts (Aggregate FV of Assets Supporting Separate Accounts) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Separate Account, Liability [Line Items]
Separate account assets	$ 90,332	$ 88,271
Equity securities
Separate Account, Liability [Line Items]
Separate account assets	90,065	87,999
Fixed maturity securities
Separate Account, Liability [Line Items]
Separate account assets	260	258
Cash and cash equivalents
Separate Account, Liability [Line Items]
Separate account assets	2	7
Other assets
Separate Account, Liability [Line Items]
Separate account assets	$ 5	$ 7

X

- Definition

Amount of asset at fair value held for benefit of separate account policyholder.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 80
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
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-URI https://asc.fasb.org//1943274/2147480078/944-80-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ References

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