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Partnership owned units in trading company.

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Percentage of monthly servicing fee to MII.

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Percentage of the trading company owned by the partnership on balance sheet date.

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Percentage of incentive fee charged by Advisor as defined in the Limited Partnership Agreement.

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Percentage of monthly management fee.

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Provisions For Income Taxes

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Face (par) amount of debt instrument at time of issuance.

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Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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Earliest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount paid for incentive rights held by the managing member or general partner, of limited liability company (LLC) or limited partnership (LP).

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Debt (bills, notes or bonds) that are issued by the government of the United States which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Summary of Investment Holdings [Line Items]
Partnership owned units in Trading Company	4,965.86		5,122.00
Partnership's aggregate ownership percentage of the Trading Company	77.12%		79.12%
Percentage of incentive fees charge by Advisor	20.00%
Incentive fees incurred during the period	$ 0	$ 0
Provision for income taxes	0	0
Tax expenses, including interest or penalties	$ 0	0
Limited Partnership Agreement [Member]
Summary of Investment Holdings [Line Items]
Percentage of Advisor monthly management fee	0.1667%
Percentage of Advisor management fee annually	(2.00%)
Net Asset Value of Class A Series 1 and Class B Series 1 Units [Member]
Summary of Investment Holdings [Line Items]
Percentage of monthly servicing fee to MII	0.0833%
Percentage of annually servicing fee to MII	(1.00%)
Net Asset Value of Class A Series 1 and Class B Series 1 Units [Member] \| General Partner [Member]
Summary of Investment Holdings [Line Items]
Percentage of Advisor monthly management fee	0.0833%
Percentage of Advisor management fee annually	(1.00%)
Net Asset Value of Class A Series 2 and Class B Series 2 Units [Member]
Summary of Investment Holdings [Line Items]
Percentage of monthly servicing fee to MII	0.0625%
Percentage of annually servicing fee to MII	(0.75%)
Man-AHL Diversified Trading Company L.P. [Member]
Summary of Investment Holdings [Line Items]
Provision for income taxes	$ 0	0
Tax expenses, including interest or penalties	0	$ 0
Cash restricted as collateral held	$ 4,327,735		$ 19,679,208
Cash and cash equivalents, maturity period	90 days or less
Foreign cash balances	$ 562,468		223,755
Foreign cash balance, cost	568,139		218,636
Man-AHL Diversified Trading Company L.P. [Member] \| U.S. Treasury Bills [Member]
Summary of Investment Holdings [Line Items]
US government securities	$ 79,993,359		79,543,495
Maturity date	Apr. 02, 2020
Maturity date	Jun. 18, 2020
Face value	$ 80,000,000		80,000,000
Man-AHL Diversified Trading Company L.P. [Member] \| U.S. Treasury Bills [Member] \| Cash and Cash Equivalents [Member]
Summary of Investment Holdings [Line Items]
US government securities	9,999,259
Face value	$ 10,000,000
Man-AHL Diversified Trading Company L.P. [Member] \| US Government Securities [Member]
Summary of Investment Holdings [Line Items]
Maturity period	90 days
Man-AHL Diversified Trading Company L.P. [Member] \| Level 2 [Member] \| U.S. Treasury Bills [Member]
Summary of Investment Holdings [Line Items]
US government securities	$ 0		$ 0