Organization of the Partnership - Additional Information (Detail) - Man-AHL Diversified I L.P [Member] $ in Thousands	9 Months Ended
Sep. 30, 2026 USD ($) Limitedpartnership shares	Sep. 30, 2025 shares
Summary of Investment Holdings [Line Items]
Number of classes of partnership units \| Limitedpartnership	2
Number of series of partnership units \| Limitedpartnership	2
Common units minimum issuable value	$ 10
Common units minimum transferrable interse value	10
Common units minimum outstanding value	10
Common units minimum redeemable value	$ 10
Class B Series 2 [Member]
Summary of Investment Holdings [Line Items]
Number of units issued \| shares	0	0

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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