Expenses and Transactions with Affiliates (Additional Information) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jul. 31, 2026 |
Mar. 18, 2026 |
Jan. 01, 2025 |
May 10, 2023 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
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| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Management fees | $ 2,532,526 | $ 2,522,056 | $ 7,514,438 | $ 7,429,497 | ||||||||||||
| Management fee payable | 846,957 | 846,957 | $ 815,967 | |||||||||||||
| Administration fees | 509,449 | 504,533 | 1,505,824 | 1,485,808 | ||||||||||||
| Expense support | $ 126,540 | 299,545 | $ 760,450 | 676,409 | ||||||||||||
| Affiliated holdings | $ 0 | |||||||||||||||
| Investments, net assets, percentage | 209.84% | [1] | 209.84% | [1] | 209.61% | [2] | ||||||||||
| Recoupment of reimbursed expenses | $ 0 | 0 | $ 0 | 0 | ||||||||||||
| Investment company expense limitation agreement, description | Prior to the Reorganization, effective January 1, 2025, which automatically renewed on January 1, 2026, the Acquired Fund operated under an expense limitation agreement with the Adviser pursuant to which the Adviser agreed to reimburse certain Fund expenses in excess of specified limits. The Reorganization did not result in a substantive change to the expense limitation arrangements between the Fund and the Adviser. In connection with the Reorganization, the Fund became a party to the expense limitation agreement (the “Expense Limitation Agreement”) effective March 18, 2026, and in continuation under this agreement, the Adviser agrees to pay on a monthly basis Other Operating Expenses of the Fund on the Fund’s behalf (each such payment, an “Expense Payment”) such that Other Operating Expenses of the Fund do not exceed 0.50% (on annualized basis) of the Fund’s average net assets (“Expense Limitation”). “Other Operating Expenses” means the Fund’s professional fees (including accounting, legal, and auditing fees), custodian and transfer agent fees, third party valuation agent fees, insurance costs, director fees, administration fee, and other related costs or expenses, but excluding the following: (a) management fees and any incentive fees, if applicable; (b) portfolio transaction and other investment-related costs (including brokerage commissions, dealer and underwriter spreads, prime broker fees and expenses, fees and expenses associated with the Fund’s securities lending program, and dividend expenses related to short sales); (c) interest, financing and structuring costs and other related expenses for borrowings and line(s) of credit; (d) taxes; (e) the Fund’s proportional share of expenses related to co-investments; (f) acquired fund fees and expenses (including fees and expenses associated with a wholly owned subsidiary); (g) Rule 12b-1 fees, if any; (h) expenses of printing and mailing proxy materials to Unit Holders of the Fund; (i) all other expenses incidental to holding meetings of the Fund’s Unit Holders, including proxy solicitations therefor; and (j) such non-recurring and/or extraordinary as may arise, including actions, suits or proceedings to which the Fund is or is threatened to be a party and the legal obligation that the Fund may have to indemnify the Fund’s directors and officers with respect thereto. | |||||||||||||||
| Transfer Agent Agreement [Member] | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Transfer agency services fees | 200,000 | 200,000 | $ 600,000 | 600,000 | ||||||||||||
| Expense Limitation Agreement [Member] | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Expense support | $ 100,000 | 300,000 | $ 800,000 | 700,000 | ||||||||||||
| Affiliated Entity [Member] | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Investments, net assets, percentage | 100.00% | 100.00% | 100.00% | |||||||||||||
| Affiliated Entity [Member] | Investment Advisory Agreement [Member] | Fidelity Diversifying Solutions LLC [Member] | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Management fees | $ 2,500,000 | 2,500,000 | $ 7,500,000 | 7,400,000 | ||||||||||||
| Management fee payable | 800,000 | 800,000 | $ 800,000 | |||||||||||||
| Management fee, percent | 1.25% | 1.25% | ||||||||||||||
| Affiliated Entity [Member] | Administration Agreement [Member] | Fidelity Diversifying Solutions LLC [Member] | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Management fee, percent | 0.25% | 0.25% | ||||||||||||||
| Administration fees | $ 500,000 | $ 500,000 | $ 1,500,000 | $ 1,500,000 | ||||||||||||
| Administrative fees, description | the Acquired Fund paid an administration fee to FDS monthly in arrears at an annual rate of 0.25% of the average daily net assets throughout the month. | |||||||||||||||
| Affiliated Entity [Member] | Transfer Agent Agreement [Member] | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Transfer fees, description | FIIOC continues to serve as the Fund’s transfer agent, distribution paying agent and registrar. The Fund pays a fee for transfer agent services equal to 0.00833% (0.10% on an annualized basis) of the Fund’s net assets as of the end of the last business day of each month. Such fees are payable monthly in arrears. | |||||||||||||||
| Affiliated Entity [Member] | Expense Limitation Agreement [Member] | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Expense support agreement maturity date | Nov. 30, 2026 | Nov. 30, 2026 | ||||||||||||||
| Maximum | Affiliated Entity [Member] | Expense Limitation Agreement [Member] | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Percentage of other operating expenses | 0.50% | 0.00% | ||||||||||||||
| Expense payment term | 45 days | |||||||||||||||
| Funds Manager, LLC | ||||||||||||||||
| Investments in and Advances to Affiliates, Activity [Line Items] | ||||||||||||||||
| Investments, net assets, percentage | 10.00% | 10.00% | 10.00% | |||||||||||||
| Number of Units | 1,644 | 1,644 | 1,699 | |||||||||||||
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