Investments (excluding Consolidated Investment Entities) - Repurchase Agreements and Securities Pledged (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Securities Financing Transaction [Line Items]
Payables under securities loan and repurchase agreements, including collateral held	$ 1,218	$ 1,273
Securities received as collateral	766	726
Total collateral held
Securities Financing Transaction [Line Items]
Payables under securities loan and repurchase agreements, including collateral held	799	762
U.S. Treasuries
Securities Financing Transaction [Line Items]
Payables under securities loan and repurchase agreements, including collateral held	57	52
U.S. corporate public securities
Securities Financing Transaction [Line Items]
Payables under securities loan and repurchase agreements, including collateral held	480	495
Short-term Investments
Securities Financing Transaction [Line Items]
Payables under securities loan and repurchase agreements, including collateral held	31	16
Foreign corporate public securities and foreign governments
Securities Financing Transaction [Line Items]
Payables under securities loan and repurchase agreements, including collateral held	$ 231	$ 199

The fair value of collateral received by the entity associated with securities borrowed that must be returned if the counterparty fulfills its obligations. It appears on the balance sheet as a liability and has a corresponding asset that appears on the balance sheet called Securities Received as Collateral.

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)(15)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-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 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-20

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- Definition

The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability.

+ References

No definition available.

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