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Investments - Schedule of Carrying Value for Limited Partnership Interests (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Debt and Equity Securities, FV-NI [Line Items]
Limited partnership interests	$ 8,844	$ 9,255
Private equity
Debt and Equity Securities, FV-NI [Line Items]
Limited partnership interests	7,247	7,734
Real estate
Debt and Equity Securities, FV-NI [Line Items]
Limited partnership interests	1,451	1,236
Other
Debt and Equity Securities, FV-NI [Line Items]
Limited partnership interests	$ 146	$ 285

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- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(18))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6B

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