Insider Trading Arrangements [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Consolidated Statements of Financial Condition [Abstract] Capital Unit, Class [Domain] Capital Units by Class [Axis] Capital Unit [Line Items] Capital units, outstanding (in units) Equity, Capital Unit or Share [Table] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents Principles of Consolidation Ownership percentage Equity Method Investment, Ownership Percentage Brokerage commissions and fees Floor Brokerage Net (loss) gain allocated from investment in Graham Alternative Investment Trading LLC: Indemnifications Guarantees, Indemnifications and Warranties Policies [Policy Text Block] Consolidated Statements of Operations [Abstract] Income Taxes Income Tax Disclosure [Text Block] Interest income Interest Income, Operating Investment in Graham Alternative Investment Trading LLC Equity Method Investments [Policy Text Block] Total liabilities Liabilities Liabilities: Total liabilities and members' capital Liabilities and Equity Liabilities and members' capital Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Cash flows provided by financing activities Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows provided by (used in) operating activities Advisory fees Advisory fees Professional fees Professional Fees Organization and Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Members' capital, ending balance Members' capital, beginning balance Total members' capital Members' capital: Capital Accounts [Abstract] Redemptions Partners' Capital Account, Redemptions Members' capital, ending balance (in units) Members' capital, beginning balance (in units) Partners' Capital Account, Units Redemptions (in units) Partners' Capital Account, Units, Redeemed Capital Accounts [Abstract] Capital Accounts Partners' Capital Notes Disclosure [Text Block] Fees and Related Party Transactions Related Party Transactions Disclosure [Text Block] Sponsor fees Sponsor fees Consolidated Statements of Cash Flows [Abstract] Consolidated Statements of Changes in Members' Capital [Abstract] Subsequent Event Type [Axis] Subsequent Event [Line Items] Subsequent Event [Table] Subsequent Event Type [Domain] Total assets Assets Investment income: Schedule of Equity Method Investments [Abstract] Equity Method Investment, Financial Statement, Reported Amounts [Abstract] Statement [Table] Assets Assets [Abstract] Statement [Line Items] Class 0 Units [Member] Class 2 Units [Member] Risk Factors [Abstract] Operating expenses Other Cost and Expense, Operating Net investment income (loss) allocated from investment in Graham Alternative Investment Trading LLC: Operating Expenses [Abstract] Expenses: Total expenses Operating Expenses Equity Method Investment [Table] Schedule of Equity Method Investments [Line Items] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss): [Abstract] Net Income (Loss) Attributable to Parent [Abstract] Net income Net (loss) income Net (loss) income Income (Loss) Attributable to Parent, before Tax Summary of Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Cash and Cash Equivalents [Abstract] Organization and Business [Abstract] Income Taxes [Abstract] Subsequent Events Subsequent Events [Text Block] Summary of Significant Accounting Policies [Abstract] Fees and Related Party Transactions [Abstract] Subsequent Events [Abstract] Basis of Accounting Subsequent Event [Member] Fair Value Fair Value Measurement, Policy [Policy Text Block] Investment in Graham Alternative Investment Trading LLC, at fair value Administrator's fees Administrator's fees Net asset value per Unit, beginning balance (in dollars per unit) Net asset value per Unit, ending balance (in dollars per unit) Net Asset Value Per Share Financial Highlights [Abstract] Financial Highlights Investment Company, Financial Highlights [Text Block] Total return before Incentive Allocation Investment Company, Total Return before Incentive Fees Total return after Incentive Allocation Investment Company, Total Return after Incentive Fees Net investment income (loss) before Incentive Allocation Investment Company, Investment Income (Loss) Ratio, before Incentive Allocation Net investment income (loss) after Incentive Allocation Investment Company, Investment Income (Loss) Ratio, after Incentive Allocation Total expenses before Incentive Allocation Investment Company, Expense Ratio before Incentive Allocation Total expenses after Incentive Allocation Investment Company, Expense Ratio after Incentive Allocation Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Net increase (decrease) in unrealized appreciation on investment Debt Securities, Trading, Unrealized Gain (Loss) Net realized (loss) gain on investment Debt Securities, Trading, Realized Gain (Loss) Net (loss) gain allocated from investment in Graham Alternative Investment Trading LLC Debt Securities, Trading, Gain (Loss) Interest expense Interest Expense, Operating Investment, Name [Domain] Investment, Name [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Minimum [Member] Cover [Abstract] Document Type Document Quarterly Report Document Transition Report Entity Interactive Data Current Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Document Period End Date Entity Registrant Name Entity Central Index Key Entity File Number Entity Tax Identification Number Entity Incorporation, State or Country Code Current Fiscal Year End Date Entity Current Reporting Status Entity Shell Company Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Entity Common Stock, Shares Outstanding The cash inflow from unit subscription activity during the reporting period. Proceeds From Subscriptions Subscriptions (net of subscription received in advance) The cash outflow from unit redemption activity during the reporting period. Payments Of Redemptions Redemptions (net of redemptions payable) Amount of proceeds from sale of investment. Proceeds from sale of investment Proceeds from sale of investment in Graham Alternative Investment Trading LLC Amount of investment purchases. Purchases of Investments Investment in Graham Alternative Investment Trading LLC Amount of net loss (income) allocated from investment. Net loss (income) allocated from investment Net income allocated from investment in Graham Alternative Investment Trading LLC Total change in each class of partners' capital accounts during the year due to subscriptions. All partners include general, limited and preferred partners. Partners Capital Account Subscriptions Subscriptions The number of units subscribed during the year of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. Partners Capital Account Subscribed Subscriptions (in units) Class 3-B of capital units, which are a type of ownership interest in a corporation. Capital Unit, Class 3-B [Member] Class 3-B Units [Member] Total change in each class of partners' capital accounts due to initial subscription. All partners include general, limited and preferred partners. Partners Capital Account Initial Subscription Initial subscription The number of units initially subscribed from each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. Partners Capital Account Initially Subscribed Initial subscription (in units) Amounts expected to be received for redemptions from investments at the end of the reporting period. Redemption receivable Redemptions receivable from Graham Alternative Investment Trading LLC Represents amount due to shareholder's for redemptions at the end of the reporting period. Redemptions payable Subscriptions for trust units received in advance. Subscription Received in Advance Subscriptions received in advance Administrator's Fee [Abstract] Professional Fees [Abstract] Advisory Fees [Abstract] Advisory Fees [Abstract] Class A and B of capital units, which are a type of ownership interest in a corporation. Capital Unit, Class A and B [Member] Class 0 and Class 2 Units [Member] Class 3-A of capital units, which are a type of ownership interest in a corporation. Capital Unit, Class 3-A [Member] Class 3-A Units [Member] Amount paid to the advisor for management of the day-to-day business functions of the LLC or LP including the fee rate, basis of calculation, relevant accounting period, whether the fee is paid to an entity other than the managing member or General Partner, or whether the fee is waived. Management fee Advisory fees at annual rate of the Members' Capital Incentive Allocation [Abstract] Incentive fees which are compensation paid to a trading advisor or to any practitioner who achieves investment results above a specified contractual level. Noninterest Expense Related to Performance Fees, Percentage Percentage of incentive allocation Amount of (reversal) expense for incentive rights held by the managing member or general partner, of limited liability company (LLC) or limited partnership (LP). Incentive Fee (Reversal) Expense Incentive allocation Sponsor Fees [Abstract] Fees paid to advisors who provide certain management support and administrative oversight services including the organization and sale of stock, investment funds, limited partnerships and mutual funds. Sponsors Fee Sponsor fees at annual rate of the Members' Capital Class 0, Class 2, and Class 3-B of capital units, which are a type of ownership interest in a corporation. Capital Unit Class 0, Class 2, and Class 3-B [Member] Class 0, Class 2, and Class 3-B Units [Member] Investment income (loss) net of operating and interest expense. Net Investment Loss Net investment income (loss) allocated from investment in Graham Alternative Investment Trading LLC Represents stated value of each capital unit per unit. Capital units, stated value Capital units, value (in dollars per unit) Number of capital units or capital shares issued. Capital Units Issued Capital units, issued (in units) Graham Alternative Investment Ltd. [Abstract] Graham Alternative Investment Ltd. [Abstract] Represents parent entity's interest in net assets, expressed as a percentage. Percentage of Ownership Interest Percentage of ownership interest Represents funds which invest in various master trading vehicles "Master Funds". Graham Alternative Investment Trading LLC [Member] Tabular disclosure of Sponsor Fees at an annual rate, disclosed as a percentage. Schedule of Sponsor Fees [Table Text Block] Sponsor Fees Subsequent Event, Fund [Abstract] Subsequent Event, Fund [Abstract] The amount of subscriptions to the fund during the period from the beginning of the period to the latest practicable date. Fund Subscriptions Fund subscriptions The amount of redemptions of the fund during the period from the beginning of the period to the latest practicable date. Fund Redemptions Fund redemptions Represents period of remittance of redemption proceed. Period of Remittance Redemption Proceeds Period of remittance for redemption proceeds Represents minimum subscription for additional units subscribed to members under each class. Subscription for Additional Units Subscribed Cost for additional units Represents minimum amount for partial redemption request. Amount for Partial Redemption Request Amount for partial redemption request Represents minimum notice period for units available for subscription. Notice Period for Units Subscription Notice period for units subscription Represents minimum holding that an investor must have before partial redemption. Holding Post Partial Redemption Holding post partial redemption Minimum amount required by the investors to invest in each class of capital units or shares. Initial Subscription Amount Initial subscription amount Represents minimum notice period for units available for redemption. Notice Period For Units Redemption Notice period for units redemption Represents tabular disclosure of ratios to average members' capital and total return. Ratios to Average Members Capital and Total Return [Table Text Block] Ratios to Average Members' Capital and Total Return Represents tabular disclosure of operating performance calculation per unit. Operating Performance Calculation Per Unit [Table Text Block] Operating Performance Calculation Per Unit The entire disclosure for any risk existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. Risk Factors [Text Block] Risk Factors Ratios To Average Members Capital And Total Return [Abstract] Ratios to average members' capital and total return [Abstract] Calculated incentive allocation as a percentage of average capital. Incentive Allocation of Net Investment Percentage Incentive Allocation Calculated incentive allocation as a percentage of beginning capital. Entities That Calculate Net Asset Value Per Share Incentive Allocation Incentive Allocation Incentive allocation paid to the manager. Incentive Allocation Allocated To Expenses Incentive Allocation Operating Performance Calculation Per Unit [Abstract] Operating performance calculation per unit [Abstract] Net Asset Value Per Unit [Abstract] Per unit operating performance [Abstract] Investment income (loss) net of operating and interest expense. Income loss Net Net income (loss) (in dollars per unit) Investment income (loss) net of operating and interest expense. Net Income (Loss) on Investment Net investment income (loss) (in dollars per unit) Amount of gains (losses) realized during the period from certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). Investments Entities That Calculate Net Asset Value Per Share Net Investment Gain (Loss) Net gain (loss) on investments (in dollars per unit) Initial asset value per share or per unit of investments. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure. Initial Asset Value Per Share Initial asset value per share (in dollars per share) Organizations And Business [Abstract] Organization And Business [Abstract]