Document And Entity Information Document Information [Table] Class of Stock [Axis] Class of Stock [Domain] Common Stock [Member] Common Stock Represents the information relating to United States Commodity Index Fund United States Commodity Index Fund [Member] United States Commodity Index Fund USCI Represents the information relating to united states copper index fund. United States Copper Index Fund [Member] United States Copper Index Fund CPER Document Information [Line Items] Document and Entity Information Document Type Document Quarterly Report Document Period End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number 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 Title of 12(b) Security Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Statements of Financial Condition Statement [Table] Legal Entity [Axis] Entity [Domain] Represents the information relating to United States Commodity Index Fund United States Commodity Index Funds Trust [Member] United States Commodity Index Funds Trust Statement Statement Offsetting [Abstract] Assets Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Financial Instruments, Owned, at Fair Value, by Type, Alternative [Abstract] Equity in trading accounts: Restricted Cash and Cash Equivalents Cash and cash equivalents Amount of Unrealized gain (loss) on open commodity futures contracts current and non current. Unrealized Gain Loss On Open Commodity Futures Contracts Current And Noncurrent Unrealized gain (loss) on open commodity futures contracts Dividends Receivable Dividends receivable Interest Receivable Interest receivable Prepaid Insurance Prepaid insurance Amount of receivables from transaction fees on exchange traded funds. Exchange Traded Fund, Transaction Fees, Receivables ETF Transaction Fees Receivable Assets Total Assets Liabilities and Equity [Abstract] Liabilities and Capital Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization Payable due to Broker The amount of payment made for shares redeemed. Payable For Shares Redeemed Payable for shares redeemed Management Fee Payable Management fees payable (Note 4) Accrued Professional Fees Professional fees payable Amount of fee payable for Directors. Directors Fees Payable Directors' fees payable Liabilities Total Liabilities Commitments and Contingencies Commitments and Contingencies (Notes 4, 5 and 6) No definition available. Capital Units [Abstract] Capital Amount of sponsor capital account. Sponsor Capital Account Sponsor Sponsor capital contribution Amount of unit holder capital account. Unitholder Capital Account Shareholders Amount of trust capital account. Trust Capital Account Balances at end of period Balances at beginning of period Total Capital Liabilities and Equity Total Liabilities and Capital Capital Units, Outstanding Shares outstanding Number of Net asset value per unit. Net Asset Value Per Unit Net asset value, end of period Net asset value, beginning of period Initial offering price per unit NAV Net asset value per share Number of market value per unit. Market Value Per Unit Market value per share Schedule of Investments Investment Type [Axis] Investments [Domain] This member stands for open commodity futures contracts - long. Open Commodity Futures Contracts - Long [Member] Open Commodity Futures Contracts - Long This member stands for open commodity futures contracts - short. Open Commodity Futures Contracts - Short [Member] Open Commodity Futures Contracts - Short US Treasury and Government [Member] United States Treasury Obligations Money Market Funds [Member] Money Market Funds Cash Equivalents [Member] Cash Equivalents Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Represents information pertaining to U.S. Treasury Bills matures on 7/02/2026, yield 3.64%. U.S. Treasury Bills, 3.64%, 7/02/2026 [Member] Matures on 7/02/2026, yield 3.64% Represents information pertaining to U.S. Treasury Bills matures on 7/09/2026, yield 3.70%. U.S. Treasury Bills, 3.70%, 7/09/2026 [Member] Matures on 7/09/2026, yield 3.70% Represents information pertaining to U.S. Treasury Bills matures on 7/14/2026, yield 3.71%. U.S. Treasury Bills, 3.71%, 7/14/2026 [Member] Matures on 7/14/2026, yield 3.71% Represents information pertaining to U.S. Treasury Bills matures on 7/16/2026, yield 3.70%. U.S. Treasury Bills, 3.70%, 7/16/2026 [Member] Matures on 7/16/2026, yield 3.70% Represents information pertaining to U.S. Treasury Bills matures on 8/20/2026, yield 3.61%. U.S. Treasury Bills, 3.61%, 8/20/2026 [Member] Matures on 8/20/2026, yield 3.61% Represents information pertaining to U.S. Treasury Bills matures on 9/03/2026, yield 3.66%. U.S. Treasury Bills, 3.66%, 9/03/2026 [Member] Matures on 9/03/2026, yield 3.66% Represents information pertaining to U.S. Treasury Bills matures on 9/08/2026, yield 3.71%. U.S. Treasury Bills, 3.71%, 9/08/2026 [Member] Matures on 9/08/2026, yield 3.71% Represents information pertaining to U.S. Treasury Bills matures on 9/10/2026, yield 3.70%. U.S. Treasury Bills, 3.70%, 9/10/2026 [Member] Matures on 9/10/2026, yield 3.70% Represents information pertaining to U.S. Treasury Bills matures on 9/10/2026, yield 3.57%. U.S. Treasury Bills, 3.57%, 9/10/2026 [Member] Matures on 9/10/2026, yield 3.57% Represents information pertaining to U.S. Treasury Bills matures on 9/22/2026, yield 3.54%. U.S. Treasury Bills, 3.54%, 9/22/2026 [Member] Matures on 9/22/2026, yield 3.54% Represents information pertaining to U.S. Treasury Bills matures on 9/29/2026, yield 3.68%. U.S. Treasury Bills, 3.68%, 9/29/2026 [Member] Matures on 9/29/2026, yield 3.68% Represents information pertaining to U.S. Treasury Bills matures on 10/06/2026, yield 3.72%. U.S. Treasury Bills, 3.72%, 10/06/2026 [Member] Matures on 10/06/2026, yield 3.72% Represents information pertaining to U.S. Treasury Bills matures on 10/13/2026, yield 3.73%. U.S. Treasury Bills, 3.73%, 10/13/2026 [Member] Matures on 10/13/2026, yield 3.73% Represents information pertaining to U.S. Treasury Bills matures on 11/19/2026, yield 3.78%. U.S. Treasury Bills, 3.78%, 11/19/2026 [Member] Matures on 11/19/2026, yield 3.78% Represents information pertaining to U.S. Treasury Bills matures on 12/03/2026, yield 3.81%. U.S. Treasury Bills, 3.81%, 12/03/2026 [Member] Matures on 12/03/2026, yield 3.81% Represents information pertaining to U.S. Treasury Bills matures on 12/10/2026, yield 3.72%. U.S. Treasury Bills, 3.72%, 12/10/2026 [Member] Matures on 12/10/2026, yield 3.72% Represents information pertaining to U.S. Treasury Bills matures on 12/10/2026, yield 3.67%. U.S. Treasury Bills, 3.67%, 12/10/2026 [Member] Matures on 12/10/2026, yield 3.67% Represents Dreyfus Institutional Preferred Government Money Market Fund - Institutional Shares, 3.60%. Dreyfus Institutional Preferred Government Money Market Fund - Institutional Shares, 3.60% [Member] Dreyfus Institutional Preferred Government Money Market Fund - Institutional Shares, 3.60% This member stands for Dreyfus Institutional Preferred Government Money Market Fund - Institutional Shares, 3.71%. Dreyfus Institutional Preferred Government Money Market Fund - Institutional Shares, 3.71% [Member] Dreyfus Institutional Preferred Government Money Market Fund - Institutional Shares, 3.71% Geographical [Axis] Geographical [Domain] UNITED STATES [Member] United States Contracts United Kingdom Contracts [Member] United Kingdom Contracts Foreign [Member] Foreign Contracts Derivative Instrument [Axis] Derivative Contract [Domain] Represents information pertaining to CME Cattle Feeder Futures August 2026 contracts, expiring August 2026. CME Cattle Feeder Futures August 2026 Contracts, Expiring August 2026 [Member] CME Cattle Feeder Futures August 2026 contracts, expiring August 2026 Represents information pertaining to NYMEX NY Harbour ULSD Futures September 2026 contracts, expiring August 2026. NYMEX NY Harbour ULSD Futures September 2026 Contracts, Expiring August 2026 [Member] NYMEX NY Harbour ULSD Futures September 2026 contracts, expiring August 2026 Represents information pertaining to CME Live Cattle Futures August 2026 contracts, expiring August 2026. CME Live Cattle Futures August 2026 Contracts, Expiring August 2026 [Member] CME Live Cattle Futures August 2026 contracts, expiring August 2026 Represents information pertaining to NYMEX RBOB Gasoline Futures RB September 2026 contracts, expiring August 2026. NYMEX RBOB Gasoline Futures RB September 2026 contracts, expiring August 2026 [Member] NYMEX RBOB Gasoline Futures RB September 2026 contracts, expiring August 2026 Represents information pertaining to CBOT Soybean Oil Futr September 2026 contracts, expiring September 2026. CBOT Soybean Oil Futr September 2026 Contracts, Expiring September 2026 [Member] CBOT Soybean Oil Futr September 2026 contracts, expiring September 2026 Represents information pertaining to CBOT Soybean Meal Futures September 2026 contracts, expiring September 2026. CBOT Soybean Meal Futures September 2026 Contracts, Expiring September 2026 [Member] CBOT Soybean Meal Futures September 2026 contracts, expiring September 2026 Represents information pertaining to ICE Coffee 'C' Future September 2026 contracts, expiring September 2026. ICE Coffee 'C' Future September 2026 Contracts, Expiring September 2026 [Member] ICE Coffee 'C' Future September 2026 contracts, expiring September 2026 Represents information pertaining to COMEX Copper Futures September 2026 contracts, expiring September 2026. COMEX Copper Futures September 2026 Contracts, Expiring September 2026 [Member] COMEX Copper Futures September 2026 contracts, expiring September 2026 Represents information pertaining to COMEX Silver Future September 2026 contracts, expiring September 2026. COMEX Silver Future September 2026 Contracts, Expiring September 2026 [Member] COMEX Silver Future September 2026 contracts, expiring September 2026 Represents information pertaining to NYMEX WTI Crude Oil Futures December 2026 contracts, expiring November 2026. NYMEX WTI Crude Oil Futures December 2026 Contracts, Expiring November 2026 [Member] NYMEX WTI Crude Oil Futures December 2026 contracts, expiring November 2026 Represents information pertaining to ICE Brent Crude Oil Futures October 2026 contracts, expiring August 2026. ICE Brent Crude Oil Futures October 2026 Contracts, Expiring August 2026 [Member] ICE Brent Crude Oil Futures October 2026 contracts, expiring August 2026 Represents information pertaining to ICE Low Sulphur Gasoil Futures September 2026 contracts, expiring September 2026. ICE Low Sulphur Gasoil Futures September 2026 Contracts, Expiring September 2026 [Member] ICE Low Sulphur Gasoil Futures September 2026 contracts, expiring September 2026 Represents information pertaining to LME Lead Future July 2026 contracts, expiring July 2026. LME Lead Future July 2026 Contracts, Expiring July 2026 [Member] LME Lead Future July 2026 contracts, expiring July 2026 Represents information pertaining to LME Zinc Futures LX September 2026 contracts, expiring September 2026. LME Zinc Futures LX September 2026 Contracts, Expiring September 2026 [Member] LME Zinc Futures LX September 2026 contracts, expiring September 2026 Represents information pertaining to LME Pri Alum Futr October 2026 contracts, expiring October 2026. LME Pri Alum Futr October 2026 Contracts, Expiring October 2026 [Member] LME Pri Alum Futr October 2026 contracts, expiring October 2026 Represents information pertaining to LME Zinc Future November 2026 contracts, expiring November 2026. LME Zinc Future November 2026 Contracts, Expiring November 2026 [Member] LME Zinc Future November 2026 contracts, expiring November 2026 Represents information pertaining to NYMEX WTI Crude Oil Futures CL March 2026 contracts, expiring February 2026. Nymex Wti Crude Oil Futures Cl March 2026 Contracts, Expiring February 2026 [Member] NYMEX WTI Crude Oil Futures CL March 2026 contracts, expiring February 2026 Represents information pertaining to NYMEX Natural Gas Futures NG March 2026 contracts, expiring February 2026. Nymex Natural Gas Futures Ng March 2026 Contracts, Expiring February 2026 [Member] NYMEX Natural Gas Futures NG March 2026 contracts, expiring February 2026 Represents information pertaining to CME Live Cattle Futures LC February 2026 contracts, expiring February 2026. Cme Live Cattle Futures Lc February 2026 Contracts, Expiring February 2026 [Member] CME Live Cattle Futures LC February 2026 contracts, expiring February 2026 Represents information pertaining to CBOT Soybean Oil BO March 2026 contracts, expiring March 2026. Cbot Soybean Oil Bo March 2026 Contracts, Expiring March 2026 [Member] CBOT Soybean Oil BO March 2026 contracts, expiring March 2026 Represents information pertaining to ICE Cocoa Futures CC March 2026 contracts, expiring March 2026. Ice Cocoa Futures Cc March 2026 Contracts, Expiring March 2026 [Member] ICE Cocoa Futures CC March 2026 contracts, expiring March 2026 Represents information pertaining to ICE Coffee Futures KC March 2026 contracts, expiring March 2026. Ice Coffee Futures Kc March 2026 Contracts, Expiring March 2026 [Member] ICE Coffee Futures KC March 2026 contracts, expiring March 2026 Represents information pertaining to CME Cattle Feeder Futures FC March 2026 contracts, expiring March 2026. Cme Cattle Feeder Futures Fc March 2026 Contracts, Expiring March 2026 [Member] CME Cattle Feeder Futures FC March 2026 contracts, expiring March 2026 Represents COMEX Copper Futures HG March 2026 contracts, expiring March 2026. COMEX Copper Futures HG March 2026 contracts, expiring March 2026 [Member] COMEX Copper Futures HG March 2026 contracts, expiring March 2026 Represents information pertaining to COMEX Silver Futures SI March 2026 contracts, expiring March 2026. Comex Silver Futures Si March 2026 Contracts, Expiring March 2026 [Member] COMEX Silver Futures SI March 2026 contracts, expiring March 2026 Represents information pertaining to NYMEX NY Harbour ULSD Futures HO April 2026 contracts, expiring March 2026. Nymex Ny Harbour Ulsd Futures Ho April 2026 Contracts, Expiring March 2026 [Member] NYMEX NY Harbour ULSD Futures HO April 2026 contracts, expiring March 2026 Represents information pertaining to ICE Sugar #11 Futures SB May 2026 contracts, expiring April 2026. Ice Sugar #11 Futures Sb May 2026 Contracts, Expiring April 2026 [Member] ICE Sugar #11 Futures SB May 2026 contracts, expiring April 2026 Represents information pertaining to ICE Low Sulphur Gasoil Futures QS January 2026 contracts, expiring January 2026. Ice Low Sulphur Gasoil Futures Qs January 2026 Contracts, Expiring January 2026 [Member] ICE Low Sulphur Gasoil Futures QS January 2026 contracts, expiring January 2026 Represents information pertaining to ICE Brent Crude Futures CO April 2026 contracts, expiring February 2026. Ice Brent Crude Futures Co April 2026 Contracts, Expiring February 2026 [Member] ICE Brent Crude Futures CO April 2026 contracts, expiring February 2026 Represents information pertaining to ICE Low Sulphur Gasoil Futures QS May 2026 contracts, expiring May 2026. Ice Low Sulphur Gasoil Futures Qs May 2026 Contracts, Expiring May 2026 [Member] ICE Low Sulphur Gasoil Futures QS May 2026 contracts, expiring May 2026 Represents information pertaining to LME Tin Futures LT January 2026 contracts, expiring January 2026. Lme Tin Futures Lt January 2026 Contracts, Expiring January 2026 [Member] LME Tin Futures LT January 2026 contracts, expiring January 2026 Represents information pertaining to LME Zinc Futures LX January 2026 contracts, expiring January 2026. Lme Zinc Futures Lx January 2026 Contracts, Expiring January 2026 [Member] LME Zinc Futures LX January 2026 contracts, expiring January 2026 Represents information pertaining to LME Tin Futures LT February 2026 contracts, expiring February 2026. Lme Tin Futures Lt February 2026 Contracts, Expiring February 2026 [Member] LME Tin Futures LT February 2026 contracts, expiring February 2026 This member stands for COMEX Copper Futures December 2026 contracts, expiring December 2026. COMEX Copper Futures December 2026 contracts, expiring December 2026 [Member] COMEX Copper Futures December 2026 contracts, expiring December 2026 This member stands for COMEX Copper Futures March 2027 contracts, expiring March 2027. COMEX Copper Futures March 2027 contracts, expiring March 2027 [Member] COMEX Copper Futures March 2027 contracts, expiring March 2027 This member stands for COMEX Copper Futures HG May 2026 contracts, expiring May 2026. COMEX Copper Futures HG May 2026 Contracts, Expiring May 2026 [Member] COMEX Copper Futures HG May 2026 contracts, expiring May 2026 This member stands for COMEX Copper Futures HG July 2026 contracts, expiring July 2026. COMEX Copper Futures HG July 2026 Contracts, Expiring July 2026 [Member] COMEX Copper Futures HG July 2026 contracts, expiring July 2026 Investment Owned, at Fair Value Notional Amount Investment Owned, Balance, Contracts Number of Contracts The amount of unrealized gain (loss) on open commodity futures and cleared swap contracts. Unrealized Gain Loss On Open Commodity Futures And Cleared Swap Contracts Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts Investment Owned, Balance, Principal Amount Shares/Principal Amount Investment Owned, Face Amount Market Value The percentage of capital. Percentage of Capital % of Partners' Capital Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Maximum Investment Interest Rate Interest rate on money market fund (as a percent) Rate of interest on investment. Investment Interest Rate1 Interest rate on money market fund (as a percent) Debt Instrument, Interest Rate, Stated Percentage Interest rate Debt Instrument, Collateral Amount Collateral amount Credit Derivative, Term Expiration date Statements of Operations Revenues [Abstract] Income No definition available. Gain Loss On Commodity Futures [Abstract] Gain (loss) on trading of commodity futures contracts: Gain (Loss) on Sale of Investments Realized gain (loss) on closed commodity futures contracts Realized Gain (Loss) on Derivatives Recognized in Income Unrealized Gain (Loss) on Investments Change in unrealized gain (loss) on open commodity futures contracts Dividend Income, Operating Dividend income Interest Income, Operating Interest income Other Income ETF transaction fees Revenues Total Income (Loss) Operating Expenses [Abstract] Expenses Management Fee Expense Management fees (Note 4) Professional Fees Professional fees Floor Brokerage, Exchange and Clearance Fees Brokerage commissions Total commissions accrued to brokers Noninterest Expense Directors Fees Fees and expenses Directors' fees and insurance Operating Expenses Total Expenses Amount of expenses waived during the period. Expense Waiver Expense waiver (Note 4) Net Income (Loss) Net income (loss) Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax Net Income (Loss) per share Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted Net Income (Loss) per weighted average share The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Weighted Average Units Outstanding Weighted average shares outstanding Statements of Changes in Capital Partner Capital Components [Axis] Partner Capital Components [Domain] Limited Partner [Member] Shareholders Amount of capital contributions. Capital Contributions Addition Amount of capital account, redemptions. Capital Account Redemptions Redemption Capital Account Units Contributed. Capital Account Units Contributed Additions Capital Account Units, Redeemed Capital Account Units Redeemed Redemptions Trust Capital Account Units Trust Capital Account Units Sponsors' shares outstanding Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] Cash Flows from Operating Activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Unrealized Gain (Loss) on Derivatives and Commodity Contracts Change in unrealized (gain) loss on open commodity futures contracts Change in Unrealized Gain (Loss) on Derivatives Recognized in Income Increase (Decrease) in Dividends Receivable (Increase) decrease in dividends receivable Increase (Decrease) in Accrued Interest Receivable, Net (Increase) decrease in interest receivable Increase (Decrease) in Prepaid Insurance (Increase) decrease in prepaid insurance Amount of increase (decrease) in exchange traded fund transaction fees receivables. Increase (Decrease) In Exchange Traded Fund Transaction Fees, Receivable (Increase) decrease in ETF transaction fees receivable Increase (Decrease) in Payable to Broker-Dealer and Clearing Organization Increase (decrease) in payable due to Broker Increase (Decrease) Management Fees Payable Increase Decrease Management Fees Payable Increase (decrease) in Management fees payable Increase (Decrease) In Professional Fees Payable Increase Decrease In Professional Fees Payable Increase (decrease) in professional fees payable Increase (Decrease) in Other Accrued Liabilities Increase (decrease) in directors' fees payable Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash Flows from Financing Activities: Proceeds from Contributed Capital Addition of shares Payments To Redemption of Units Payments To Redemption Of Units Redemption of shares Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net Increase (Decrease) in Cash and Cash Equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Total Cash, Cash Equivalents and Equity in Trading Accounts, end of period Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of period Total Cash, Cash Equivalents and Equity in Trading Accounts Cash and Cash Equivalents, at Carrying Value [Abstract] Components of Cash, Cash Equivalents and Equity in Trading Accounts: n/a. Equity In Trading Accounts [Abstract] Equity in Trading Accounts: Amount of cash and cash equivalents relating to equity in trading account. Cash and Cash Equivalents, Equity In Trading Account Cash and cash equivalents ORGANIZATION AND BUSINESS Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] ORGANIZATION AND BUSINESS SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES TRUST SERIES Capital Requirements on Trust Assets [Text Block] TRUST SERIES FEES PAID BY EACH TRUST SERIES AND RELATED PARTY TRANSACTIONS The entire disclosure for fees paid and related party transactions. Fees Paid and Related Party Transactions Disclosure [Text Block] FEES PAID BY EACH TRUST SERIES AND RELATED PARTY TRANSACTIONS CONTRACTS AND AGREEMENTS Long-term Contracts or Programs Disclosure [Text Block] CONTRACTS AND AGREEMENTS FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES Financial Instruments Disclosure [Text Block] FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES No definition available. FINANCIAL HIGHLIGHTS Additional Financial Information Disclosure [Text Block] FINANCIAL HIGHLIGHTS FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] FAIR VALUE OF FINANCIAL INSTRUMENTS SUBSEQUENT EVENTS Subsequent Events [Text Block] SUBSEQUENT EVENTS Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation Revenue [Policy Text Block] Revenue Recognition Commissions, Policy [Policy Text Block] Brokerage Commissions Income Tax, Policy [Policy Text Block] Income Taxes Shares Subject to Mandatory Redemption, Changes in Redemption Value, Policy [Policy Text Block] Creations and Redemptions Disclosure of accounting policy for trust capital and allocation of income and losses. Trust Capital and Allocation of Income and Losses [Policy Text Block] Trust Capital and Allocation of Income and Losses Net Asset Value [Policy Text Block] Net Asset Value Policy [Policy Text Block] Calculation of Per Share NAV Earnings Per Share, Policy [Policy Text Block] Net Income (Loss) Per Share Cash and Cash Equivalents, Policy [Policy Text Block] Cash Equivalents Use of Estimates, Policy [Policy Text Block] Use of Estimates New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Pronouncement Tabular disclosure of fees earned by the broker commission. Brokerage Commissions [Table Text Block] Schedule of brokerage and futures commission Tabular disclosure of per unit performance data and other supplemental financial data table. Per Unit Performance Data and Other Supplemental Financial Data Table [Text Block] Schedule of per share performance data and other supplemental financial data for each trust series Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. Fair Value Asset And Liabilities Measured On Recurring And Nonrecurring Basis [Table Text Block] Schedule of summary of valuation of Usci's, Cper's, Usag's and Usmi's securities using fair value hierarchy Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of fair value of derivative instruments held by Usci, Cper, Usag and Usmi Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of effect of derivative instruments on statements of operations of Usci, Cper, Usag and Usmi Disclosure of information about organization and business dimension, domain and member. Organization Consolidation and Presentation Of Financial Statements Disclosure [Table] Industry Sector [Axis] Industry Sector [Domain] Represents the information relating to creation baskets. Creation Baskets [Member] Creation Baskets 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. Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] ORGANIZATION AND BUSINESS Number of shares per basket. Number Of Units Per Basket Number of units per basket The amount for fee paid per order. Fee Paid Per Order Fee paid by authorized purchasers for each order placed to create one or more creation baskets or to redeem one or more baskets Disclosure of information about significant accounting policies. Significant Accounting Policies [Table] Period [Axis] Period [Axis] Period [Domain] Period [Domain] Inception Period [Member] Effective as of May 1, 2012 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. Significant Accounting Policies [Line Items] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Income Tax Examination, Penalties and Interest Expense Income tax interest expense or penalties Weighted Average Number of Shares Outstanding, Basic Weighted average number of shares outstanding, basic Duration of a cash equivalents maturity period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. Cash Equivalents Maturity Period Cash equivalents maturity period Schedule of Capital Units [Table] NYMEX Member NYMEX NYMEX Ice Futures [Member] Ice Futures ICE Futures Chicago Board of Trade [Member] Chicago Board of Trade Chicago Board of Trade (CBOT) Chicago Mercantile Exchange [Member] Chicago Mercantile Exchange Chicago Mercantile Exchange (CME) London Metal Exchange [Member] London Metal Exchange London Metal Exchange (LME) Commodity Exchange Inc [Member] Commodity Exchange Inc Commodity Exchange Inc (COMEX) Capital Unit [Line Items] TRUST SERIES Amount of capital contributions initial. Capital Contributions Initial Capital contribution to trust series It represents the shares common units issued for acquisition. Common Units Issued For Acquisition Units acquisition Number of initially registered shares. Number Of Units Registered In Period Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission Number of shares issued during the period. Units Issued During Period Units New Issues Number of units issued Amount received from the issuance of new shares during the period. Units Issued During Period Value New Issues Value of unit issued It represents the shares common units redeemed. Common Units Redeemed Units redeemed Number of share purchased during the period. Number of Stock Purchased Number of shares purchased Number of Contracts Number Of Contracts Future contract held Investment, Type [Extensible Enumeration] Schedule of Related Party Transactions, by Related Party [Table] Nature of Expense [Axis] Interim Period, Costs Not Allocable [Domain] Directors and Officers Liability Insurance [Member] Directors and Officers Liability Insurance Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent event Scenario [Axis] Scenario, Unspecified [Domain] Scenario Forecast [Member] Forecast Related Party Transaction [Line Items] FEES PAID BY EACH TRUST SERIES AND RELATED PARTY TRANSACTIONS Percentage of average daily net assets. Percentage Of Average Daily Net Assets Percentage of average daily net assets paid Trustee Fees Trustee annual fee Registration fees and offering expenses. Registration fees and offering expenses Registration fees and offering expenses Number of additional share were registered. Number Of Additional Shares of Trust Registered Number of additional shares which were registered Other General Expense Estimated investor tax reporting costs and audit expenses Long-Duration Contracts, Assumptions, by Product and Guarantee [Table] Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] CONTRACTS AND AGREEMENTS Its represent the percentage of total net assets. Percentage Of Total Net Assets Percentage of total net assets Total commissions as annualized percentage of average total net assets This member stands for Group twenty-six. On each Trust Series' assets in excess of $3 billion [Member] On each Trust Series' assets in excess of $3 billion Minimum [Member] Minimum Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Represents the information relating to marketing agreement. Marketing Agreement [Member] Marketing Agreement Represents information pertaining to SummerHaven Agreements. SummerHaven Agreements [member] SummerHaven Agreements Futures [Member] Futures Future Contract Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Licensing Agreements [Member] Licensing Agreements The percentage of base fee. Base Fee Percentage Fee percentage The amount of commissions paid. Commissions Paid Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts Derivative, Notional Amount Derivative, notional amount The amount of license fee payments. License Fee Payments Annual licensing fee A table or schedule providing information about carrying amounts and fair values of financial instruments or liabilities. Carrying Amounts and Fair Values Of Financial Instruments Or Liabilities [Table] FINANCIAL HIGHLIGHTS 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. Carrying Amounts and Fair Values Of Financial Instruments Or Liabilities [Line Items] FINANCIAL HIGHLIGHTS FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES Deposits, Money Market Deposits Treasuries and money market funds Deposits Cash deposits and investments in treasuries A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Increase Decrease In Partner Capital [Roll Forward] Per Share Operating Performance: Amount of total income (loss), per unit. Total Income Loss Per Unit Total income (loss) Total expenses, per unit. Total Expenses Per Unit Total expenses Increase (decrease) in net asset value per unit. Increase Decrease In Net Asset Value Per Unit Net increase (decrease) in net asset value Rate of return on average asset. Rate of return on average asset Total Return No definition available. Average Net Assets [Abstract] Ratios to Average Net Assets Percentage of total revenue. Percentage Of Total Revenue Total income (loss) Percentage of management incentive fee. Management Incentive Fee Percentage Management fees Percentage of expenses, excluding management fee. Expenses Excluding Management Fee Percentage Total expenses excluding management fees It represents percentage of consolidated net income (loss). Percentage Of Consolidated Net Income Loss Net income (loss) Debt and Equity Securities, FV-NI [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Level I Level II [Member] Level II Level III [Member] Level III Short-Term Investments [Member] Short-Term Investments Exchange-Traded Futures Contracts [Member] Exchange-Traded Futures Contracts Debt and Equity Securities, FV-NI [Line Items] FAIR VALUE OF FINANCIAL INSTRUMENTS Investments, Fair Value Disclosure Securities, fair value Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Hedging Designation [Axis] Hedging Designation [Domain] Not designated as Hedging Instrument [Member] Not designated as Hedging Instrument Commodity Contracts [Member] Commodity Contracts Financial Instrument [Axis] Financial Instruments [Domain] Derivatives, Fair Value [Line Items] FAIR VALUE OF FINANCIAL INSTRUMENTS Derivative Asset Derivatives not Accounted for as Hedging Instruments Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative assets, statement of financial position [Extensible Enumeration] Derivative Instruments, Gain (Loss) [Table] Location, Statement of Income, Balance [Axis] Derivative Instruments, Gain (Loss) [Line Items] FAIR VALUE OF FINANCIAL INSTRUMENTS No definition available. Rule 10b5-1 Arrangement Modified No definition available. Non-Rule 10b5-1 Arrangement Modified