Fair Value Measurement and Disclosures - Schedule of Quantitative Measure Used To Determine the Fair Values of the Level III Investments (Parenthetical) (Detail) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Payment-in-kind income	$ (6,325)	$ (12,402)
Apollo Infrastructure Company LLC Series One [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Payment-in-kind income	(1,831)	(3,553)
Apollo Infrastructure Company LLC Series Two [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Payment-in-kind income	$ (4,494)	$ (8,849)

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.

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