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Insurance (Aggregate FV of Assets Supporting Separate Accounts) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Separate Account, Liability [Line Items]
Separate account assets	$ 87,440	$ 84,965
Equity securities
Separate Account, Liability [Line Items]
Separate account assets	87,164	84,667
Fixed maturity securities
Separate Account, Liability [Line Items]
Separate account assets	260	278
Cash and cash equivalents
Separate Account, Liability [Line Items]
Separate account assets	9	9
Other
Separate Account, Liability [Line Items]
Separate account assets	$ 7	$ 11

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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