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Fair Value and Future Funding Commitments Related to These Investments (Parenthetical) (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2024
USD ($)
Global Debt Fund, LP  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Proceeds from partial redemption of partnership interest $ 4.3