Derivatives and Hedging - Summary of Fair Values of Derivatives Instruments Recognized in Consolidated Statements of Financial Condition (Detail) - Forward Foreign Currency Exchange Contracts [Member] - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets | ||
| Derivatives Fair Value [Line Items] | ||
| Other assets, fair value | $ 5 | $ 10 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilities | ||
| Derivatives Fair Value [Line Items] | ||
| Other liabilities, fair value | $ 17 | $ 1 |
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- Definition Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Aggregate fair value of all derivative liabilities designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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