Significant Accounting Policies - Schedule of Cash and Cash Equivalents and Restricted Cash (Detail) - Man-AHL Diversified Trading Company L.P. [Member] - USD ($)	Sep. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024
As at September 30, 2026, and December 31, 2025 and September 30, 2025, the amounts included in cash and cash equivalents and restricted cash include the following:
Cash and cash equivalents	$ 4,029,667	$ 13,134,376	$ 8,818,989
Restricted cash	35,330,428	30,258,275	30,221,258
Total cash and cash equivalents and restricted cash	$ 39,360,095	$ 43,392,651	$ 39,040,247	$ 36,618,643

Amount of cash and cash equivalent restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.