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Fair Value Disclosures - Investments in Certain Entities Calculate Net Asset Value per Share (Parenthetical) (Detail) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Fair Value, Investments, Entities that Calculate Net Asset Value Per Share Line Items |  |
Total Unfunded Commitments | $ 2,356 | $ 1,215
Investment, Type [Extensible Enumeration] | Real Assets Funds [Member] | Real Assets Funds [Member]
Real Assets Funds [Member] |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share Line Items |  |
Total Unfunded Commitments | $ 1,900 | $ 750
Total remaining Unfunded Commitments | $ 1,900 | $ 736

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- Definition Fair value investments entities that calculate net asset value per share remaining unfunded commitments. + References No definition available. + Details
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