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Revenue - Schedule of Estimated Investment Advisory, Administration Fees Expected to be Recognized in Future, Related to Unsatisfied Portion of Performance Obligations (Detail) - Investment Advisory, Administration Fees and Securities Lending Revenue [Member] - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Schedule of Investment Advisory Administration Fees and Performance Fees by Type [line Items] |  |  |
Revenue, Remaining Performance Obligation | [1],[2] | $ 1,252 | $ 1,303
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-01-01 |  |  |
Schedule of Investment Advisory Administration Fees and Performance Fees by Type [line Items] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  |  | 1 year
Revenue, Remaining Performance Obligation | [1],[2] |  | $ 427
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-01-01 |  |  |
Schedule of Investment Advisory Administration Fees and Performance Fees by Type [line Items] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  | 1 year | 1 year
Revenue, Remaining Performance Obligation | [1],[2] | $ 492 | $ 381
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2027-01-01 |  |  |
Schedule of Investment Advisory Administration Fees and Performance Fees by Type [line Items] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  | 1 year | 1 year
Revenue, Remaining Performance Obligation | [1],[2] | $ 459 | $ 353
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2028-01-01 |  |  |
Schedule of Investment Advisory Administration Fees and Performance Fees by Type [line Items] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  | 1 year | 1 year
Revenue, Remaining Performance Obligation | [1],[2] | $ 226 | $ 142
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2029-01-01 |  |  |
Schedule of Investment Advisory Administration Fees and Performance Fees by Type [line Items] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period |  | 1 year |
Revenue, Remaining Performance Obligation | [1],[2] | $ 75 |
[1] | Investment advisory and administration fees include management fees related to certain private markets products, which are determined based on known contractual committed capital outstanding at December 31, 2025 and 2024. Revenue attributed to future periods could be subject to change due to a change in business activities (e.g. post-investment period) and actual amounts could differ from amounts disclosed in the table above.
[2] | The Company elected practical expedients to exclude amounts related to (a) performance obligations with an original duration of one year or less, and (b) variable consideration related to future service periods.

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- Definition Schedule of investment advisory administration fees performance fees by type. + References No definition available. + Details
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(1) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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