United States Gasoline Fund (UGA) 10-Q 12 Nov 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2013
Document Information [Line Items]	'
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	30-Sep-13
Document Fiscal Year Focus	'2013
Document Fiscal Period Focus	'Q3
Trading Symbol	'UGA
Entity Common Stock, Shares Outstanding	0
Entity Registrant Name	'United States Gasoline Fund, LP
Entity Central Index Key	'0001396878
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Accelerated Filer

Condensed_Statements_of_Financ

Condensed Statements of Financial Condition (USD $)	Sep. 30, 2013	Dec. 31, 2012
Assets	'	'
Cash and cash equivalents (Notes 2 and 5)	$47,156,459	$56,400,613
Equity in UBS Securities LLC trading accounts:	'	'
Cash and cash equivalents	4,830,667	5,170,139
Unrealized gain (loss) on open commodity futures contracts	-1,506,179	2,608,343
Receivable from General Partner (Note 3)	121,746	139,446
Dividend receivable	655	1,399
Other assets	185,103	219,375
Total assets	50,788,451	64,539,315
Liabilities and Partners' Capital	'	'
Professional fees payable	188,537	275,643
General Partner management fees payable (Note 3)	26,043	32,860
Brokerage commissions payable	1,723	2,348
Other liabilities	2,893	2,976
Total liabilities	219,196	313,827
Commitments and Contingencies (Notes 3, 4 and 5)	'	'
Partners' Capital	'	'
General Partner	0	0
Limited Partners	50,569,255	64,225,488
Total Partners' Capital	50,569,255	64,225,488
Total liabilities and partners' capital	$50,788,451	$64,539,315
Limited Partners' units outstanding	900,000	1,100,000
Net asset value per unit	$56.19	$58.39
Market value per unit	$56.09	$58.44

Condensed_Schedule_of_Investme

Condensed Schedule of Investments (USD $)	Sep. 30, 2013
	Contract
Open Cleared Swap and Futures Contracts [Member] | Open Futures Contracts, Long [Member] | U S [Member] | NYMEX RBOB Gasoline Futures RB August 2013 contracts, expiring October 2013	'
Number of contracts	458	[1]
Unrealized Loss on Open Commodity Contracts	($1,506,179)	[1]
% of Partners' Capital	-2.98%	[1]
Cash Equivalents [Member]	'
Market Value	45,494,728
% of Partners' Capital	89.97%
Cash Equivalents [Member] | U S [Member] | US Treasury Securities [Member] | US Treasury Bill Securities [Member]	'
Principal Amount	3,000,000
Market Value	2,999,745
% of Partners' Capital	5.93%
Cash Equivalents [Member] | U S [Member] | Money Market Funds [Member]	'
Market Value	42,494,983
% of Partners' Capital	84.04%
Cash Equivalents [Member] | U S [Member] | Money Market Funds [Member] | Fidelity Institutional Government Portfolio, Class I [Member]	'
Principal Amount	18,063,515
Market Value	18,063,515
% of Partners' Capital	35.72%
Cash Equivalents [Member] | U S [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds Government Fund, Class FS [Member]	'
Principal Amount	11,407,119
Market Value	11,407,119
% of Partners' Capital	22.56%
Cash Equivalents [Member] | U S [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Fund, Government Portfolio [Member]	'
Principal Amount	13,024,349
Market Value	$13,024,349
% of Partners' Capital	25.76%
[1]	Collateral amounted to $4,830,847 on open futures contracts.

Condensed_Schedule_of_Investme1

Condensed Schedule of Investments (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013
NYMEX RBOB Gasoline Futures RB August 2013 contracts, expiring October 2013 | Open Cleared Swap and Futures Contracts [Member] | Open Futures Contracts, Long [Member]	'
Expiration date	'October 2013
US Treasury Bill Securities [Member] | US Treasury Securities [Member] | Cash Equivalents [Member]	'
Expiration date	'11/21/2013
Interest rate	0.06%
U S [Member] | NYMEX RBOB Gasoline Futures RB August 2013 contracts, expiring October 2013 | Open Futures Contracts, Long [Member]	'
Debt Instrument, Collateral Amount	4,830,847

Condensed_Statements_of_Operat

Condensed Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Gain (loss) on trading of commodity futures contracts:	'	'	'	'
Realized gain (loss) on closed positions	$952,430	$18,656,454	$3,844,332	$22,151,581
Change in unrealized gain (loss) on open positions	1,840,482	-446,691	-4,114,522	-4,990,671
Dividend income	2,022	2,968	7,348	10,155
Interest income	993	3,125	3,733	9,821
Other income	1,400	2,100	4,550	10,850
Total income (loss)	2,797,327	18,217,956	-254,559	17,191,736
Expenses	'	'	'	'
General Partner management fees (Note 3)	86,656	121,989	267,729	452,832
Professional fees	51,985	67,402	188,537	186,219
Registration fees	11,709	4,652	34,745	9,202
Brokerage commissions	9,866	14,218	29,833	51,603
Other expenses	5,349	7,711	16,893	26,085
Total expenses	165,565	215,972	537,737	725,941
Expense waiver (Note 3)	-30,338	-37,603	-121,746	-75,028
Net expenses	135,227	178,369	415,991	650,913
Net income (loss)	$2,662,100	$18,039,587	($670,550)	$16,540,823
Net income (loss) per limited partnership unit	$1.87	$12.17	($2.20)	$12.36
Net loss per weighted average limited partnership unit	$2.78	$12.50	($0.67)	$8.91
Weighted average limited partnership units outstanding	956,522	1,442,935	1,006,410	1,855,474

Condensed_Statement_of_Changes

Condensed Statement of Changes in Partners' Capital (USD $)	Total	General Partner [Member]	Limited Partner [Member]
Balances at Dec. 31, 2012	$64,225,488	$0	$64,225,488
Net asset value, beginning of period at Dec. 31, 2012	$58.39	'	'
Addition of 250,000 partnership units	14,024,331	0	14,024,331
Redemption of 450,000 partnership units	-27,010,014	0	-27,010,014
Net loss	-670,550	0	-670,550
Balances at Sep. 30, 2013	$50,569,255	$0	$50,569,255
Net asset value, end of period at Sep. 30, 2013	$56.19	'	'

Condensed_Statement_of_Changes1

Condensed Statement of Changes in Partners' Capital (Parenthetical)	9 Months Ended
	Sep. 30, 2013
Addition of partnership units, units	250,000
Redemption of partnership units, units	450,000

Condensed_Statements_of_Cash_F

Condensed Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows from Operating Activities:	'	'
Net loss	($670,550)	$16,540,823
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'
(Increase) decrease in commodity futures trading account - cash and cash equivalents	339,472	-7,552,423
Unrealized loss on open futures contracts	4,114,522	4,990,671
Decrease in receivable from General Partner	17,700	29,025
(Increase) decrease in dividend receivable	744	-388
Decrease in interest receivable	0	4
Decrease in other assets	34,272	5,478
Decrease investment payable	0	-33
Decrease in professional fees payable	-87,106	-53,539
Decrease in General Partner management fees payable	-6,817	-2,617
Decrease in brokerage commissions payable	-625	-967
Decrease in other liabilities	-83	-77
Net cash provided by operating activities	3,741,529	13,955,957
Cash Flows from Financing Activities:	'	'
Addition of partnership units	14,024,331	81,310,937
Redemption of partnership units	-27,010,014	-102,457,198
Net cash provided by financing activities	-12,985,683	-21,146,261
Net Decrease in Cash and Cash Equivalents	-9,244,154	-7,190,304
Cash and Cash Equivalents, beginning of period	56,400,613	68,137,372
Cash and Cash Equivalents, end of period	$47,156,459	$60,947,068

Organization_and_Business

Organization and Business	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation Of Financial Statements [Abstract]	'
Organization and Business	'
	NOTE 1 — ORGANIZATION AND BUSINESS
	The United States Gasoline Fund, LP (“UGA”) was organized as a limited partnership under the laws of the state of Delaware on April 13, 2007. UGA is a commodity pool that issues limited partnership units (“units”) that may be purchased and sold on the NYSE Arca, Inc. (the “NYSE Arca”). Prior to November 25, 2008, UGA’s units traded on the American Stock Exchange (the “AMEX”). UGA will continue in perpetuity, unless terminated sooner upon the occurrence of one or more events as described in its Second Amended and Restated Agreement of Limited Partnership dated as of March 1, 2013 (the “LP Agreement”). The investment objective of UGA is for the daily changes in percentage terms of its units’ per unit net asset value (“NAV”) to reflect the daily changes in percentage terms of the spot price of gasoline (also known as reformulated gasoline blendstock for oxygen blending, or “RBOB”, for delivery to the New York harbor), as measured by the daily changes in the price of the futures contract for gasoline traded on the New York Mercantile Exchange (the “NYMEX”) that is the near month contract to expire, except when the near month contract is within two weeks of expiration, in which case the futures contract will be the next month contract to expire (the “Benchmark Futures Contract”), less UGA’s expenses. It is not the intent of UGA to be operated in a fashion such that the per unit NAV will equal, in dollar terms, the spot price of gasoline or any particular futures contract based on gasoline. It is not the intent of UGA to be operated in a fashion such that its per unit NAV will reflect the percentage change of the price of any particular futures contract as measured over a time period greater than one day. United States Commodity Funds LLC (“USCF”), the general partner of UGA, believes that it is not practical to manage the portfolio to achieve such an investment goal when investing in Futures Contracts (as defined below) and Other Gasoline-Related Investments (as defined below). UGA accomplishes its objective through investments in futures contracts for gasoline, crude oil, natural gas, heating oil and other petroleum-based fuels that are traded on the NYMEX, ICE Futures or other U.S. and foreign exchanges (collectively, “Futures Contracts”) and other gasoline-related investments such as cash-settled options on Futures Contracts, forward contracts for gasoline, cleared swap contracts and over-the-counter transactions that are based on the price of gasoline, crude oil and other petroleum-based fuels, Futures Contracts and indices based on the foregoing (collectively, “Other Gasoline-Related Investments”). As of September 30, 2013, UGA held 458 Futures Contracts for gasoline traded on the NYMEX and did not hold any Futures Contracts traded on ICE Futures.
	UGA commenced investment operations on February 26, 2008 and has a fiscal year ending on December 31. USCF is responsible for the management of UGA. USCF is a member of the National Futures Association (the “NFA”) and became a commodity pool operator registered with the Commodity Futures Trading Commission (the “CFTC”) effective December 1, 2005. USCF is also the general partner of the United States Oil Fund, LP (“USOF”), the United States Natural Gas Fund, LP (“USNG”), the United States 12 Month Oil Fund, LP (“US12OF”) and the United States Diesel-Heating Oil Fund, LP (formerly, the United States Heating Oil Fund, LP) (“USDHO”), which listed their limited partnership units on the AMEX under the ticker symbols “USO” on April 10, 2006, “UNG” on April 18, 2007, “USL” on December 6, 2007 and “UHN” on April 9, 2008, respectively. As a result of the acquisition of the AMEX by NYSE Euronext, each of USOF’s, USNG’s, US12OF’s and USDHO’s units commenced trading on the NYSE Arca on November 25, 2008. USCF is also the general partner of the United States Short Oil Fund, LP (“USSO”), the United States 12 Month Natural Gas Fund, LP (“US12NG”) and the United States Brent Oil Fund, LP (“USBO”), which listed their limited partnership units on the NYSE Arca under the ticker symbols “DNO” on September 24, 2009, “UNL” on November 18, 2009 and “BNO” on June 2, 2010, respectively. USCF is also the sponsor of the United States Commodity Index Fund (“USCI”), the United States Copper Index Fund (“CPER”), the United States Agriculture Index Fund (“USAG”), and the United States Metals Index Fund (“USMI”), each a series of the United States Commodity Index Funds Trust. USCI, CPER, USAG and USMI listed their units on the NYSE Arca under the ticker symbol “USCI” on August 10, 2010, “CPER” on November 15, 2011, “USAG” on April 13, 2012 and “USMI” on June 19, 2012, respectively. All funds listed previously are referred to collectively herein as the “Related Public Funds.” USCF has also filed registration statements to register units of the United States Sugar Fund (“USSF”), the United States Natural Gas Double Inverse Fund (“UNGD”), the United States Gasoil Fund (“USGO”) and the United States Asian Commodities Basket Fund (“UAC”), each a series of the United States Commodity Funds Trust I, and the US Golden Currency Fund (“HARD”), a series of the United States Currency Funds Trust. USSF, UNGD, USGO and HARD are currently not available to the public, as such funds are still in the process of review by various regulatory agencies which have regulatory authority over USCF and such funds. UAC has been declared effective by the regulatory agencies which have regulatory authority over USCF and UAC, but at the time of the filing of this quarterly report on Form 10-Q, UAC has not been made available to the public.
	Effective February 29, 2012, UGA issues units to certain authorized purchasers (“Authorized Purchasers”) by offering baskets consisting of 50,000 units (“Creation Baskets”) through ALPS Distributors, Inc., as the marketing agent (the “Marketing Agent”). Prior to February 29, 2012, UGA issued units to Authorized Purchasers by offering baskets consisting of 100,000 units through the Marketing Agent. The purchase price for a Creation Basket is based upon the NAV of a unit calculated shortly after the close of the core trading session on the NYSE Arca on the day the order to create the basket is properly received.
	From July 1, 2011 through December 31, 2013 (and continuing at least through May 1, 2014), the applicable transaction fee paid by Authorized Purchasers is $350 to UGA for each order they place to create or redeem one or more baskets (“Redemption Baskets”); prior to July 1, 2011, this fee was $1,000. Units may be purchased or sold on a nationally recognized securities exchange in smaller increments than a Creation Basket or Redemption Basket. Units purchased or sold on a nationally recognized securities exchange are not purchased or sold at the per unit NAV of UGA but rather at market prices quoted on such exchange.
	In November 2007, UGA initially registered 30,000,000 units on Form S-1 with the U.S. Securities and Exchange Commission (the “SEC”). On February 26, 2008, UGA listed its units on the AMEX under the ticker symbol “UGA”. On that day, UGA established its initial per unit NAV by setting the price at $50.00 and issued 300,000 units in exchange for $15,000,000. UGA also commenced investment operations on February 26, 2008 by purchasing Futures Contracts traded on the NYMEX based on gasoline. As of September 30, 2013, UGA had registered a total of 72,800,000 units.
	The accompanying unaudited condensed financial statements have been prepared in accordance with Rule 10-01 of Regulation S-X promulgated by the SEC and, therefore, do not include all information and footnote disclosure required under generally accepted accounting principles (“GAAP”) in the United States of America. The financial information included herein is unaudited; however, such financial information reflects all adjustments, consisting only of normal recurring adjustments, which are, in the opinion of USCF, necessary for the fair presentation of the condensed financial statements for the interim period.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	NOTE 2 — SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Revenue Recognition
	Commodity futures contracts, forward contracts, physical commodities and related options are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized gains or losses on open contracts are reflected in the condensed statements of financial condition and represent the difference between the original contract amount and the market value (as determined by exchange settlement prices for futures contracts and related options and cash dealer prices at a predetermined time for forward contracts, physical commodities, and their related options) as of the last business day of the year or as of the last date of the condensed financial statements. Changes in the unrealized gains or losses between periods are reflected in the condensed statements of operations. UGA earns interest on its assets denominated in U.S. dollars on deposit with the futures commission merchant at the 90-day Treasury bill rate. In addition, UGA earns income on funds held at the custodian or futures commission merchant at prevailing market rates earned on such investments.
	Brokerage Commissions
	Brokerage commissions on all open commodity futures contracts are accrued on a full-turn basis.
	Income Taxes
	UGA is not subject to federal income taxes; each partner reports his/her allocable share of income, gain, loss deductions or credits on his/her own income tax return.
	In accordance with GAAP, UGA is required to determine whether a tax position is more likely than not to be sustained upon examination by the applicable taxing authority, including resolution of any tax related appeals or litigation processes, based on the technical merits of the position. UGA files an income tax return in the U.S. federal jurisdiction, and may file income tax returns in various U.S. states. UGA is not subject to income tax return examinations by major taxing authorities for years before 2009. The tax benefit recognized is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. De-recognition of a tax benefit previously recognized results in UGA recording a tax liability that reduces net assets. However, UGA’s conclusions regarding this policy may be subject to review and adjustment at a later date based on factors including, but not limited to, on-going analysis of and changes to tax laws, regulations and interpretations thereof. UGA recognizes interest accrued related to unrecognized tax benefits and penalties related to unrecognized tax benefits in income tax fees payable, if assessed. No interest expense or penalties have been recognized as of and for the period ended September 30, 2013.
	Creations and Redemptions
	Effective February 29, 2012, Authorized Purchasers may purchase Creation Baskets or redeem Redemption Baskets only in blocks of 50,000 units at a price equal to the NAV of the units calculated shortly after the close of the core trading session on the NYSE Arca on the day the order is placed. Prior to February 29, 2012, Authorized Purchasers could only purchase Creation Baskets or redeem Redemption Baskets in blocks of 100,000 units.
	UGA receives or pays the proceeds from units sold or redeemed within three business days after the trade date of the purchase or redemption. The amounts due from Authorized Purchasers are reflected in UGA’s condensed statements of financial condition as receivable for units sold, and amounts payable to Authorized Purchasers upon redemption are reflected as payable for units redeemed.
	Partnership Capital and Allocation of Partnership Income and Losses
	Profit or loss shall be allocated among the partners of UGA in proportion to the number of units each partner holds as of the close of each month. USCF may revise, alter or otherwise modify this method of allocation as described in the LP Agreement.
	Calculation of Per Unit Net Asset Value
	UGA’s per unit NAV is calculated on each NYSE Arca trading day by taking the current market value of its total assets, subtracting any liabilities and dividing that amount by the total number of units outstanding. UGA uses the closing price for the contracts on the relevant exchange on that day to determine the value of contracts held on such exchange.
	Net Income (Loss) Per Unit
	Net income (loss) per unit is the difference between the per unit NAV at the beginning of each period and at the end of each period. The weighted average number of units outstanding was computed for purposes of disclosing net income (loss) per weighted average unit. The weighted average units are equal to the number of units outstanding at the end of the period, adjusted proportionately for units added and redeemed based on the amount of time the units were outstanding during such period. There were no units held by USCF at September 30, 2013.
	Offering Costs
	Offering costs incurred in connection with the registration of additional units after the initial registration of units are borne by UGA. These costs include registration fees paid to regulatory agencies and all legal, accounting, printing and other expenses associated with such offerings. These costs are accounted for as a deferred charge and thereafter amortized to expense over twelve months on a straight-line basis or a shorter period if warranted.
	Cash Equivalents
	Cash equivalents include money market funds and overnight deposits or time deposits with original maturity dates of six months or less.
	Reclassification
	Certain amounts in the accompanying condensed financial statements were reclassified to conform to the current presentation.
	Use of Estimates
	The preparation of condensed financial statements in conformity with GAAP requires USCF to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed financial statements, and the reported amounts of the revenue and expenses during the reporting period. Actual results may differ from those estimates and assumptions.

Fees_Paid_By_The_Fund_And_Rela

Fees Paid By The Fund And Related Party Transactions	9 Months Ended
	Sep. 30, 2013
Fees Paid By Fund And Related Party Transactions [Abstract]	'
Fees Paid By The Fund And Related Party Transactions	'
	NOTE 3 — FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS
	USCF Management Fee
	Under the LP Agreement, USCF is responsible for investing the assets of UGA in accordance with the objectives and policies of UGA. In addition, USCF has arranged for one or more third parties to provide administrative, custody, accounting, transfer agency and other necessary services to UGA. For these services, UGA is contractually obligated to pay USCF a fee, which is paid monthly, equal to 0.60% per annum of average daily total net assets.
	Ongoing Registration Fees and Other Offering Expenses
	UGA pays all costs and expenses associated with the ongoing registration of its units subsequent to the initial offering. These costs include registration or other fees paid to regulatory agencies in connection with the offer and sale of units, and all legal, accounting, printing and other expenses associated with such offer and sale. For the nine months ended September 30, 2013 and 2012, UGA incurred $34,745 and $9,202, respectively, in registration fees and other offering expenses.
	Directors’ Fees and Expenses
	UGA is responsible for paying its portion of the directors’ and officers’ liability insurance for UGA and the Related Public Funds and the fees and expenses of the independent directors who also serve as audit committee members of UGA and the Related Public Funds organized as limited partnerships and, as of July 8, 2011, the Related Public Funds organized as a series of a Delaware statutory trust. UGA shares the fees and expenses on a pro rata basis with each Related Public Fund, as described above, based on the relative assets of each fund computed on a daily basis. These fees and expenses for the year ending December 31, 2013 are estimated to be a total of $560,625 for UGA and the Related Public Funds.
	Licensing Fees
	As discussed in Note 4 below, UGA entered into a licensing agreement with the NYMEX on April 10, 2006, as amended on October 20, 2011. Pursuant to the agreement, through October 19, 2011, UGA and the Related Public Funds, other than USBO, USCI, CPER, USAG and USMI, paid a licensing fee that was equal to 0.04% for the first $1,000,000,000 of combined net assets of the funds and 0.02% for combined net assets above $1,000,000,000. On and after October 20, 2011, UGA and the Related Public Funds, other than USBO, USCI, CPER, USAG and USMI, pay a licensing fee that is equal to 0.015% on all net assets. During the nine months ended September 30, 2013 and 2012, UGA incurred $6,693 and $11,321, respectively, under this arrangement.
	Investor Tax Reporting Cost
	The fees and expenses associated with UGA’s audit expenses and tax accounting and reporting requirements are paid by UGA. These costs are estimated to be $250,000 for the year ending December 31, 2013.
	Other Expenses and Fees and Expense Waivers
	In addition to the fees described above, UGA pays all brokerage fees and other expenses in connection with the operation of UGA, excluding costs and expenses paid by USCF as outlined in Note 4 below. USCF has voluntarily agreed to pay certain expenses normally borne by UGA, to the extent that such expenses exceed 0.15% (15 basis points) of UGA’s NAV, on an annualized basis, through at least December 31, 2013. USCF has no obligation to continue such payments into subsequent periods. For the nine months ended September 30, 2013, USCF waived $121,746 of UGA’s expenses. This voluntary expense waiver is in addition to those amounts USCF is contractually obligated to pay as described in Note 4.

Contracts_and_Agreements

Contracts and Agreements	9 Months Ended
	Sep. 30, 2013
Contractors [Abstract]	'
Contracts and Agreements	'
	NOTE 4 — CONTRACTS AND AGREEMENTS
	UGA is party to a marketing agent agreement, dated as of February 15, 2008, as amended from time to time, with the Marketing Agent and USCF, whereby the Marketing Agent provides certain marketing services for UGA as outlined in the agreement. The fee of the Marketing Agent, which is borne by USCF, is equal to 0.06% on UGA’s assets up to $3 billion; and 0.04% on UGA’s assets in excess of $3 billion. In no event may the aggregate compensation paid to the Marketing Agent and any affiliate of USCF for distribution related services exceed 10% of the gross proceeds of UGA’s offering.
	The above fee does not include the following expenses, which are also borne by USCF: the cost of placing advertisements in various periodicals; website construction and development; or the printing and production of various marketing materials.
	UGA is also party to a custodian agreement, dated January 16, 2008, as amended from time to time, with Brown Brothers Harriman & Co. (“BBH&Co.”) and USCF, whereby BBH&Co. holds investments on behalf of UGA. USCF pays the fees of the custodian, which are determined by the parties from time to time. In addition, UGA is party to an administrative agency agreement, dated February 7, 2008, as amended from time to time, with USCF and BBH&Co., whereby BBH&Co. acts as the administrative agent, transfer agent and registrar for UGA. USCF also pays the fees of BBH&Co. for its services under such agreement and such fees are determined by the parties from time to time.
	Currently, USCF pays BBH&Co. for its services, in the foregoing capacities, a minimum amount of $75,000 annually for its custody, fund accounting and fund administration services rendered to UGA and each of the Related Public Funds, as well as a $20,000 annual fee for its transfer agency services. In addition, USCF pays BBH&Co. an asset-based charge of (a)  0.06% for the first $500 million of UGA’s, USOF’s, USNG’s, US12OF’s, USDHO’s, USSO’s, US12NG’s, USBO’s, USCI’s, CPER’s, USAG’s and USMI’s combined net assets, (b)  0.0465% for UGA’s, USOF’s, USNG’s, US12OF’s, USDHO’s, USSO’s, US12NG’s, USBO’s, USCI’s, CPER’s, USAG’s and USMI’s combined net assets greater than $500 million but less than $1 billion, and (c)  0.035% once UGA’s, USOF’s, USNG’s, US12OF’s, USDHO’s, USSO’s, US12NG’s, USBO’s, USCI’s, CPER’s, USAG’s and USMI’s combined net assets exceed $1 billion. The annual minimum amount will not apply if the asset-based charge for all accounts in the aggregate exceeds $75,000. USCF also pays transaction fees ranging from $7 to $15 per transaction.
	On October 8, 2013, UGA entered into a brokerage agreement with RBC Capital Markets, LLC (“RBC Capital” or “RBC”) to serve as UGA’s futures commission merchant (“FCM”), effective October 10, 2013. Prior to October 10, 2013, the FCM was UBS Securities LLC (“UBS Securities”). The agreements require RBC Capital and UBS Securities to provide services to UGA in connection with the purchase and sale of Futures Contracts and Other Gasoline-Related Investments that may be purchased and sold by or through RBC Capital and/or UBS Securities for UGA’s account. In accordance with each agreement, RBC Capital and UBS Securities charge UGA commissions of approximately $7 to $15 per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts. Such fees include those incurred when purchasing Futures Contracts and options on Futures Contracts when UGA issues units as a result of a Creation Basket, as well as fees incurred when selling Futures Contracts and options on Futures Contracts when UGA redeems units as a result of a Redemption Basket. Such fees are also incurred when Futures Contracts and options on Futures Contracts are purchased or redeemed for the purpose of rebalancing the portfolio. UGA also incurs commissions to brokers for the purchase and sale of Futures Contracts, Other Gasoline-Related Investments or short-term obligations of the United States of two years or less (“Treasuries”). During the nine months ended September 30, 2013, total commissions accrued to brokers amounted to $29,833. Of this amount, approximately $28,818 was a result of rebalancing costs and approximately $1,015 was the result of trades necessitated by creation and redemption activity. By comparison, during the nine months ended September 30, 2012, total commissions accrued to brokers amounted to $51,603. Of this amount, approximately $46,678 was a result of rebalancing costs and approximately $4,925 was the result of trades necessitated by creation and redemption activity. The decrease in the total commissions accrued to brokers for the nine months ended September 30, 2013, as compared to the nine months ended September 30, 2012, was primarily a function of a lower number of futures contracts that were held and traded as a result of UGA’s reduced net assets during the nine months ended September 30, 2013. As an annualized percentage of average daily total net assets, the figure for the nine months ended September 30, 2013 represents approximately 0.07% of average daily total net assets. By comparison, the figure for the nine months ended September 30, 2012 represented approximately 0.07% of average daily total net assets. However, there can be no assurance that commission costs and portfolio turnover will not cause commission expenses to rise in future quarters.
	UGA and the NYMEX entered into a licensing agreement on April 10, 2006, as amended on October 20, 2011, whereby UGA was granted a non-exclusive license to use certain of the NYMEX’s settlement prices and service marks. Under the licensing agreement, UGA and the Related Public Funds, other than USBO, USCI, CPER, USAG and USMI, pay the NYMEX an asset-based fee for the license, the terms of which are described in Note 3. UGA expressly disclaims any association with the NYMEX or endorsement of UGA by the NYMEX and acknowledges that “NYMEX” and “New York Mercantile Exchange” are registered trademarks of the NYMEX.

Financial_Instruments_OffBalan

Financial Instruments, Off-Balance Sheet Risks and Contingencies	9 Months Ended
	Sep. 30, 2013
Financial Instruments Off Balance Sheet Risks And Contingencies [Abstract]	'
Financial Instruments, Off-Balance Sheet Risks and Contingencies	'
	NOTE 5 — FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES
	UGA engages in the trading of futures contracts, options on futures contracts and cleared swaps (collectively, “derivatives”). UGA is exposed to both market risk, which is the risk arising from changes in the market value of the contracts, and credit risk, which is the risk of failure by another party to perform according to the terms of a contract.
	UGA may enter into futures contracts, options on futures contracts and cleared swaps to gain exposure to changes in the value of an underlying commodity. A futures contract obligates the seller to deliver (and the purchaser to accept) the future delivery of a specified quantity and type of a commodity at a specified time and place. Some futures contracts may call for physical delivery of the asset, while others are settled in cash. The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity or by making an offsetting sale or purchase of an identical futures contract on the same or linked exchange before the designated date of delivery.
	The purchase and sale of futures contracts, options on futures contracts and cleared swaps require margin deposits with a futures commission merchant. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act requires a futures commission merchant to segregate all customer transactions and assets from the futures commission merchant’s proprietary activities.
	Futures contracts and cleared swaps involve, to varying degrees, elements of market risk (specifically commodity price risk) and exposure to loss in excess of the amount of variation margin. The face or contract amounts reflect the extent of the total exposure UGA has in the particular classes of instruments. Additional risks associated with the use of futures contracts are an imperfect correlation between movements in the price of the futures contracts and the market value of the underlying securities and the possibility of an illiquid market for a futures contract.
	All of the futures contracts held by UGA were exchange-traded through September 30, 2013. The risks associated with exchange-traded contracts are generally perceived to be less than those associated with over-the-counter transactions since, in over-the-counter transactions, a party must rely solely on the credit of its respective individual counterparties. However, in the future, if UGA were to enter into non-exchange traded contracts, it would be subject to the credit risk associated with counterparty non-performance. The credit risk from counterparty non-performance associated with such instruments is the net unrealized gain, if any, on the transaction. UGA has credit risk under its futures contracts since the sole counterparty to all domestic and foreign futures contracts is the clearinghouse for the exchange on which the relevant contracts are traded. In addition, UGA bears the risk of financial failure by the clearing broker.
	UGA’s cash and other property, such as Treasuries, deposited with a futures commission merchant are considered commingled with all other customer funds, subject to the futures commission merchant’s segregation requirements. In the event of a futures commission merchant’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited. The insolvency of a futures commission merchant could result in the complete loss of UGA’s assets posted with that futures commission merchant; however, the majority of UGA’s assets are held in investments in Treasuries, cash and/or cash equivalents with UGA’s custodian and would not be impacted by the insolvency of a futures commission merchant. The failure or insolvency of UGA’s custodian, however, could result in a substantial loss of UGA’s assets.
	USCF invests a portion of UGA’s cash in money market funds that seek to maintain a stable per unit NAV. UGA is exposed to any risk of loss associated with an investment in such money market funds. As of September 30, 2013 and December 31, 2012, UGA held investments in money market funds in the amounts of $42,494,983 and $47,494,982, respectively. UGA also holds cash deposits with its custodian. Pursuant to a written agreement with BBH&Co., uninvested overnight cash balances are swept to offshore branches of U.S. regulated and domiciled banks located in Toronto, Canada, London, United Kingdom, Grand Cayman, Cayman Islands and Nassau, Bahamas, which are subject to U.S. regulation and regulatory oversight. As of September 30, 2013 and December 31, 2012, UGA held cash deposits and investments in Treasuries in the amounts of $9,492,143 and $14,075,770, respectively, with the custodian and futures commission merchant. Some or all of these amounts may be subject to loss should UGA’s custodian and/or futures commission merchant cease operations.
	For derivatives, risks arise from changes in the market value of the contracts. Theoretically, UGA is exposed to market risk equal to the value of futures contracts purchased and unlimited liability on such contracts sold short. As both a buyer and a seller of options, UGA pays or receives a premium at the outset and then bears the risk of unfavorable changes in the price of the contract underlying the option.
	UGA’s policy is to continuously monitor its exposure to market and counterparty risk through the use of a variety of financial, position and credit exposure reporting controls and procedures. In addition, UGA has a policy of requiring review of the credit standing of each broker or counterparty with which it conducts business.
	The financial instruments held by UGA are reported in its condensed statements of financial condition at market or fair value, or at carrying amounts that approximate fair value, because of their highly liquid nature and short-term maturity.

Financial_Highlights

Financial Highlights	9 Months Ended
	Sep. 30, 2013
Financial Highlights [Abstract]	'
Financial Highlights	'
	NOTE 6 — FINANCIAL HIGHLIGHTS
	The following table presents per unit performance data and other supplemental financial data for the nine months ended September 30, 2013 and 2012 for the unitholders. This information has been derived from information presented in the condensed financial statements.
		For the nine months ended			For the nine months ended
		September 30, 2013			September 30, 2012
		(Unaudited)			(Unaudited)
	Per Unit Operating Performance:
	Net asset value, beginning of period	$	58.39		$	48.37
	Total income (loss)		-1.79			12.71
	Net expenses		-0.41			-0.35
	Net increase (decrease) in net asset value		-2.2			12.36
	Net asset value, end of period	$	56.19		$	60.73
	Total Return		-3.77	%		25.55	%
	Ratios to Average Net Assets
	Total income (loss)		-0.43	%		17.05	%
	Management fees*		0.6	%		0.6	%
	Total expenses excluding management fees*		0.61	%		0.36	%
	Expenses waived*		-0.27	%		-0.1	%
	Net expenses excluding management fees*		0.33	%		0.26	%
	Net income (loss)		-1.12	%		16.41	%
	* Annualized
	Total returns are calculated based on the change in value during the period. An individual unitholder’s total return and ratio may vary from the above total returns and ratios based on the timing of contributions to and withdrawals from UGA.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

'

Fair Value of Financial Instruments

'

NOTE 7 — FAIR VALUE OF FINANCIAL INSTRUMENTS

UGA values its investments in accordance with Accounting Standards Codification 820 – Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosures about fair value measurement. The changes to past practice resulting from the application of ASC 820 relate to the definition of fair value, the methods used to measure fair value, and the expanded disclosures about fair value measurement. ASC 820 establishes a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of UGA (observable inputs) and (2) UGA’s own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the ASC 820 hierarchy are as follows:

Level I – Quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

Level II – Inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. Level II assets include the following: quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market-corroborated inputs).

Level III – Unobservable pricing input at the measurement date for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available.

In some instances, the inputs used to measure fair value might fall within different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls shall be determined based on the lowest input level that is significant to the fair value measurement in its entirety.

The following table summarizes the valuation of UGA’s securities at September 30, 2013 using the fair value hierarchy:

At September 30, 2013

Total

Level I

Level II

Level III

Short-Term Investments

$

45,494,728

$

45,494,728

$

—

$

—

Exchange-Traded Futures Contracts

United States Contracts

-1,506,179

-1,506,179

—

—

During the nine months ended September 30, 2013, there were no transfers between Level I and Level II.

The following table summarizes the valuation of UGA’s securities at December 31, 2012 using the fair value hierarchy:

At December 31, 2012

Total

Level I

Level II

Level III

Short-Term Investments

$

51,194,826

$

51,194,826

$

—

$

—

Exchange-Traded Futures Contracts

United States Contracts

2,608,343

2,608,343

—

—

During the year ended December 31, 2012, there were no transfers between Level I and Level II.

Effective January 1, 2009, UGA adopted the provisions of Accounting Standards Codification 815—Derivatives and Hedging, which require presentation of qualitative disclosures about objectives and strategies for using derivatives, quantitative disclosures about fair value amounts and gains and losses on derivatives.

Fair Value of Derivative Instruments

Derivatives not

Condensed

Fair Value  At

Fair Value

Accounted for

Statements of Financial

September 30, 2013

At December 31, 2012

as Hedging

Condition Location

Instruments

Futures -

Assets

$

-1,506,179

$

2,608,343

Commodity Contracts

The Effect of Derivative Instruments on the Condensed Statements of Operations

For the nine months ended

For the nine months ended

September 30, 2013

September 30, 2012

Derivatives not

Location of

Realized

Change in

Realized

Change in

Accounted for

Gain or (Loss)

Gain or (Loss)

Unrealized

Gain or (Loss)

Unrealized

as Hedging

on Derivatives

on Derivatives

Gain or (Loss)

on Derivatives

Gain or (Loss)

Instruments

Recognized

Recognized in

on Derivatives

Recognized in

on Derivatives

in Income

Income

Recognized in

Income

Recognized in

Income

Income

Futures -

Realized gain on closed positions

$

3,844,332

$

22,151,581

Commodity Contracts

Change in unrealized loss on open positions

$

-4,114,522

$

-4,990,671

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	NOTE 8 — SUBSEQUENT EVENTS
	UGA has performed an evaluation of subsequent events through the date the condensed financial statements were issued. The subsequent events, which did not necessitate disclosures and/or adjustments to the financial statements, were as follows:
	On October 8, 2013, USCF entered into a Futures and Cleared Derivatives Transactions Customer Account Agreement with RBC Capital to serve as UGA’s FCM, effective October 10, 2013. Prior to October 10, 2013, UBS Securities was UGA’s FCM. This agreement requires RBC Capital to provide services to UGA, as of October 10, 2013, in connection with the purchase and sale of Futures Contracts and Other Gasoline-Related Investments that may be purchased or sold by or through RBC Capital for UGA’s account. For the period October 10, 2013 and after, UGA pays RBC Capital commissions for executing and clearing trades on behalf of UGA. Prior to October 10, 2013, and therefore for the entire period of this quarterly report on Form 10-Q for the period ended September 30, 2013, UGA paid UBS Securities commissions for executing and clearing trades on behalf of UGA.
	RBC Capital’s primary address is 500 West Madison Street, Suite 2500, Chicago, Illinois 60661. UBS Securities’ principal business address is 677 Washington Blvd., Stamford, CT 06901. From UGA’s commencement of trading to October 10, 2013, UBS Securities was a futures clearing broker for UGA. Effective October 10, 2013, RBC Capital became the futures clearing broker for UGA. Both RBC Capital and UBS Securities are registered in the U.S. with the Financial Industry Regulatory Authority as a broker-dealer and with the CFTC as a FCM. RBC Capital and UBS Securities are members of various U.S. futures and securities exchanges.
	RBC is a large broker-dealer subject to many different complex legal and regulatory requirements. As a result, certain of RBC’s regulators may from time to time conduct investigations, initiate enforcement proceedings and/or enter into settlements with RBC with respect to issues raised in various investigations. RBC complies fully with its regulators in all investigations being conducted and in all settlements it reaches. In addition, RBC is and has been subject to a variety of civil legal claims in various jurisdictions, a variety of settlement agreements and a variety of orders, awards and judgments made against it by courts and tribunals, both in regard to such claims and investigations. RBC complies fully with all settlements it reaches and all orders, awards and judgments made against it.
	RBC has been named as a defendant in various legal actions, including arbitrations, class actions and other litigation including those described below, arising in connection with its activities as a broker-dealer. Certain of the actual or threatened legal actions include claims for substantial compensatory and/or punitive damages or claims for indeterminate amounts of damages. RBC is also involved, in other reviews, investigations and proceedings (both formal and informal) by governmental and self-regulatory agencies regarding RBC’s business, including among other matters, accounting and operational matters, certain of which may result in adverse judgments, settlements, fines, penalties, injunctions or other relief.
	RBC contests liability and/or the amount of damages, as appropriate, in each pending matter. In view of the inherent difficulty of predicting the outcome of such matters, particularly in cases where claimants seek substantial or indeterminate damages or where investigations and proceedings are in the early stages, RBC cannot predict the loss or range of loss, if any, related to such matters; how or if such matters will be resolved; when they will ultimately be resolved; or what the eventual settlement, fine, penalty or other relief, if any, might be. Subject to the foregoing, RBC believes, based on current knowledge and after consultation with counsel, that the outcome of such pending matters will not have a material adverse effect on the consolidated financial condition of RBC.
	On March 11, 2013, the New Jersey Bureau of Securities entered a consent order settling an administrative complaint against RBC, which alleged that RBC failed to follow its own procedures with respect to monthly account reviews and failed to maintain copies of the monthly account reviews with respect to certain accounts that James Hankins Jr. maintained at the firm in violation of N.J.S.A. 49:3-58(a)(2)(xi) and 49:3-59(b). Without admitting or denying the findings of fact and conclusions of law, RBC consented to a civil monetary penalty of $150,000 (of which $100,000 was suspended as a result of the firm’s cooperation) and to pay disgorgement of $300,000.
	On May 2, 2012, the Massachusetts Securities Division entered a consent order settling an administrative complaint against RBC, which alleged that RBC recommended unsuitable products to its brokerage and advisory clients and failed to supervise its registered representatives’ sales of inverse and leveraged ETFs in violation of Section 204(a)(2) of the Massachusetts Uniform Securities Act (“MUSA”). Without admitting or denying the allegations of fact, RBC consented to permanently cease and desist from violations of MUSA, pay restitution of $2.9 million to the investors who purchased the inverse and leveraged ETFs and pay a civil monetary penalty of $250,000.
	On September 27, 2011, the SEC commenced and settled an administrative proceeding against RBC for willful violations of Sections 17(a)(2) and 17(a)(3) of the 1933 Act for negligently selling the collateralized debt obligations to five Wisconsin school districts despite concerns about the suitability of the product. The firm agreed to pay disgorgement of $6.6 million, prejudgment interest of $1.8 million, and a civil monetary penalty of $22 million.
	On February 24, 2009, the SEC commenced and settled an administrative proceeding against RBC for willful violations of Section 15B(c)(1) of the 1934 Act and Municipal Securities Rulemaking Board Rules G-17, G-20 and G-27, related to municipal expenses in connection with ratings agency trips. The firm was censured and paid a civil monetary penalty of $125,000.
	On June 9, 2009, the SEC commenced and settled a civil action against RBC for willful violations of Section 15(c) of the 1934 Act, in connection with auction rate securities (ARS). The firm agreed to repurchase ARS owned by certain retail customers and to use best efforts to provide ineligible customers opportunities to liquidate ARS, and other ancillary relief.
	Please see RBC’s Form BD for more details.
	RBC Capital will only act as a clearing broker for UGA and as such will be paid commissions for executing and clearing trades on behalf of UGA. Prior to October 10, 2013, UBS Securities acted only as clearing broker for UGA and as such was paid commissions for executing and clearing trades on behalf of UGA. Neither RBC Capital nor UBS Securities has passed upon the adequacy or accuracy of this quarterly report on Form 10-Q. Neither RBC Capital nor UBS Securities will act in any supervisory capacity with respect to USCF or participate in the management of USCF or UGA.
	Neither RBC Capital nor UBS Securities is affiliated with UGA or USCF. Therefore, neither USCF nor UGA believe that there are any conflicts of interest with RBC Capital and UBS Securities or their trading principals arising from their acting as UGA’s FCM.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Revenue Recognition	'
	Revenue Recognition
	Commodity futures contracts, forward contracts, physical commodities and related options are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized gains or losses on open contracts are reflected in the condensed statements of financial condition and represent the difference between the original contract amount and the market value (as determined by exchange settlement prices for futures contracts and related options and cash dealer prices at a predetermined time for forward contracts, physical commodities, and their related options) as of the last business day of the year or as of the last date of the condensed financial statements. Changes in the unrealized gains or losses between periods are reflected in the condensed statements of operations. UGA earns interest on its assets denominated in U.S. dollars on deposit with the futures commission merchant at the 90-day Treasury bill rate. In addition, UGA earns income on funds held at the custodian or futures commission merchant at prevailing market rates earned on such investments.
Brokerage Commissions	'
	Brokerage Commissions
	Brokerage commissions on all open commodity futures contracts are accrued on a full-turn basis.
Income Taxes	'
	Income Taxes
	UGA is not subject to federal income taxes; each partner reports his/her allocable share of income, gain, loss deductions or credits on his/her own income tax return.
	In accordance with GAAP, UGA is required to determine whether a tax position is more likely than not to be sustained upon examination by the applicable taxing authority, including resolution of any tax related appeals or litigation processes, based on the technical merits of the position. UGA files an income tax return in the U.S. federal jurisdiction, and may file income tax returns in various U.S. states. UGA is not subject to income tax return examinations by major taxing authorities for years before 2009. The tax benefit recognized is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. De-recognition of a tax benefit previously recognized results in UGA recording a tax liability that reduces net assets. However, UGA’s conclusions regarding this policy may be subject to review and adjustment at a later date based on factors including, but not limited to, on-going analysis of and changes to tax laws, regulations and interpretations thereof. UGA recognizes interest accrued related to unrecognized tax benefits and penalties related to unrecognized tax benefits in income tax fees payable, if assessed. No interest expense or penalties have been recognized as of and for the period ended September 30, 2013.
Creations and Redemptions	'
	Creations and Redemptions
	Effective February 29, 2012, Authorized Purchasers may purchase Creation Baskets or redeem Redemption Baskets only in blocks of 50,000 units at a price equal to the NAV of the units calculated shortly after the close of the core trading session on the NYSE Arca on the day the order is placed. Prior to February 29, 2012, Authorized Purchasers could only purchase Creation Baskets or redeem Redemption Baskets in blocks of 100,000 units.
	UGA receives or pays the proceeds from units sold or redeemed within three business days after the trade date of the purchase or redemption. The amounts due from Authorized Purchasers are reflected in UGA’s condensed statements of financial condition as receivable for units sold, and amounts payable to Authorized Purchasers upon redemption are reflected as payable for units redeemed.
Partnership Capital and Allocation of Partnership Income and Losses	'
	Partnership Capital and Allocation of Partnership Income and Losses
	Profit or loss shall be allocated among the partners of UGA in proportion to the number of units each partner holds as of the close of each month. USCF may revise, alter or otherwise modify this method of allocation as described in the LP Agreement.
Calculation of Per Unit Net Asset Value	'
	Calculation of Per Unit Net Asset Value
	UGA’s per unit NAV is calculated on each NYSE Arca trading day by taking the current market value of its total assets, subtracting any liabilities and dividing that amount by the total number of units outstanding. UGA uses the closing price for the contracts on the relevant exchange on that day to determine the value of contracts held on such exchange.
Net Income (Loss) Per Unit	'
	Net Income (Loss) Per Unit
	Net income (loss) per unit is the difference between the per unit NAV at the beginning of each period and at the end of each period. The weighted average number of units outstanding was computed for purposes of disclosing net income (loss) per weighted average unit. The weighted average units are equal to the number of units outstanding at the end of the period, adjusted proportionately for units added and redeemed based on the amount of time the units were outstanding during such period. There were no units held by USCF at September 30, 2013.
Offering Costs	'
	Offering Costs
	Offering costs incurred in connection with the registration of additional units after the initial registration of units are borne by UGA. These costs include registration fees paid to regulatory agencies and all legal, accounting, printing and other expenses associated with such offerings. These costs are accounted for as a deferred charge and thereafter amortized to expense over twelve months on a straight-line basis or a shorter period if warranted.
Cash Equivalents	'
	Cash Equivalents
	Cash equivalents include money market funds and overnight deposits or time deposits with original maturity dates of six months or less.
Reclassification	'
	Reclassification
	Certain amounts in the accompanying condensed financial statements were reclassified to conform to the current presentation.
Use of Estimates	'
	Use of Estimates
	The preparation of condensed financial statements in conformity with GAAP requires USCF to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed financial statements, and the reported amounts of the revenue and expenses during the reporting period. Actual results may differ from those estimates and assumptions.

Financial_Highlights_Tables

Financial Highlights (Tables)	9 Months Ended
	Sep. 30, 2013
Financial Highlights [Abstract]	'
Per Unit Performance Data and Other Supplemental Financial Data	'
	The following table presents per unit performance data and other supplemental financial data for the nine months ended September 30, 2013 and 2012 for the unitholders. This information has been derived from information presented in the condensed financial statements.
		For the nine months ended			For the nine months ended
		September 30, 2013			September 30, 2012
		(Unaudited)			(Unaudited)
	Per Unit Operating Performance:
	Net asset value, beginning of period	$	58.39		$	48.37
	Total income (loss)		-1.79			12.71
	Net expenses		-0.41			-0.35
	Net increase (decrease) in net asset value		-2.2			12.36
	Net asset value, end of period	$	56.19		$	60.73
	Total Return		-3.77	%		25.55	%
	Ratios to Average Net Assets
	Total income (loss)		-0.43	%		17.05	%
	Management fees*		0.6	%		0.6	%
	Total expenses excluding management fees*		0.61	%		0.36	%
	Expenses waived*		-0.27	%		-0.1	%
	Net expenses excluding management fees*		0.33	%		0.26	%
	Net income (loss)		-1.12	%		16.41	%
	* Annualized

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

'

Valuation of Securities Using Fair Value Hierarchy

'

The following table summarizes the valuation of UGA’s securities at September 30, 2013 using the fair value hierarchy:

At September 30, 2013

Total

Level I

Level II

Level III

Short-Term Investments

$

45,494,728

$

45,494,728

$

—

$

—

Exchange-Traded Futures Contracts

United States Contracts

-1,506,179

-1,506,179

—

—

During the nine months ended September 30, 2013, there were no transfers between Level I and Level II.

The following table summarizes the valuation of UGA’s securities at December 31, 2012 using the fair value hierarchy:

At December 31, 2012

Total

Level I

Level II

Level III

Short-Term Investments

$

51,194,826

$

51,194,826

$

—

$

—

Exchange-Traded Futures Contracts

United States Contracts

2,608,343

2,608,343

—

—

Fair Value of Derivative Instruments

'

Fair Value of Derivative Instruments

Derivatives not

Condensed

Fair Value  At

Fair Value

Accounted for

Statements of Financial

September 30, 2013

At December 31, 2012

as Hedging

Condition Location

Instruments

Futures -

Assets

$

-1,506,179

$

2,608,343

Commodity Contracts

Effect of Derivative Instruments on Condensed Statements of Operations

'

The Effect of Derivative Instruments on the Condensed Statements of Operations

For the nine months ended

For the nine months ended

September 30, 2013

September 30, 2012

Derivatives not

Location of

Realized

Change in

Realized

Change in

Accounted for

Gain or (Loss)

Gain or (Loss)

Unrealized

Gain or (Loss)

Unrealized

as Hedging

on Derivatives

on Derivatives

Gain or (Loss)

on Derivatives

Gain or (Loss)

Instruments

Recognized

Recognized in

on Derivatives

Recognized in

on Derivatives

in Income

Income

Recognized in

Income

Recognized in

Income

Income

Futures -

Realized gain on closed positions

$

3,844,332

$

22,151,581

Commodity Contracts

Change in unrealized loss on open positions

$

-4,114,522

$

-4,990,671

Organization_and_Business_Addi

Organization and Business (Additional Information) (Details) (USD $)	1 Months Ended
	Feb. 26, 2008	Nov. 30, 2007	31-May-14	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Jul. 01, 2011	Feb. 29, 2012	Sep. 30, 2013	Feb. 29, 2012
									Creation Baskets [Member]	Open Cleared Swap and Futures Contracts [Member]	Prior to February 29, 2012 [Member]
										Open Futures Contracts, Long [Member]	Creation Baskets [Member]
										NYMEX RBOB Gasoline Futures RB May 2013 contracts, expiring April 2013 [Member]
										U S [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Number of contracts	'	'	'	'	'	'	'	'	'	458	'
Number of units per basket	'	'	'	'	'	'	'	'	50,000	'	100,000
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets	'	'	350	'	'	'	'	1,000	'	'	'
Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission	'	30,000,000	'	'	'	'	'	'	'	'	'
Net asset value per unit	$50	'	'	$56.19	$58.39	$60.73	$48.37	'	'	'	'
Number of units issued	300,000	'	'	'	'	'	'	'	'	'	'
Value of units issued	$15,000,000	'	'	'	'	'	'	'	'	'	'
Commenced investment operations date	26-Feb-08	'	'	'	'	'	'	'	'	'	'
Number of registered units	'	'	'	72,800,000	'	'	'	'	'	'	'

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Additional Information) (Details) (USD $)	9 Months Ended				9 Months Ended
	Sep. 30, 2013	Feb. 29, 2012	Feb. 29, 2012	Feb. 29, 2012	Sep. 30, 2013
		Creation Baskets [Member]	Redemption Baskets [Member]	Prior to February 29, 2012 [Member]	Maximum [Member]
				Creation Baskets [Member]
Significant Accounting Policies [Line Items]	'	'	'	'	'
Minimum likelihood of tax benefits being recognized upon ultimate settlement	50.00%	'	'	'	'
Recognized interest income expense and penalties related to unrecognized tax benefits	$0	'	'	'	'
Number of units per basket	'	50,000	50,000	100,000	'
Cash equivalents maturity period	'	'	'	'	'6 months

Fees_Paid_by_Fund_and_Related_

Fees Paid by Fund and Related Party Transactions (Additional Information) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fees Paid and Related Party Transactions [Line Items]	'	'	'	'
USCF Management Fee	'	'	'UGA is contractually obligated to pay USCF a fee, which is paid monthly, equal to 0.60% per annum of average daily total net assets.	'
Percentage of average daily net assets	0.60%	'	0.60%	'
Ongoing registration fees and other offering expenses	'	'	$34,745	$9,202
Licensing fee incurred	'	'	6,693	11,321
Estimated investor tax reporting cost	'	'	250,000	'
Expense waiver	30,338	37,603	121,746	75,028
Maximum [Member]	'	'	'	'
Fees Paid and Related Party Transactions [Line Items]	'	'	'	'
Costs and expenses annual limit for reimbursement	'	'	0.02%	'
UGA and the Related Public Funds [Member]	'	'	'	'
Fees Paid and Related Party Transactions [Line Items]	'	'	'	'
Estimated directorsb fees and expenses	'	'	560,625	'
Licensing Agreements [Member] | First $1,000,000,000 of combined net assets of the funds [Member]	'	'	'	'
Fees Paid and Related Party Transactions [Line Items]	'	'	'	'
Fee percentage	'	'	0.04%	'
Licensing Agreements [Member] | First $1,000,000,000 of combined net assets of the funds [Member] | Maximum [Member]	'	'	'	'
Fees Paid and Related Party Transactions [Line Items]	'	'	'	'
Combined assets basis for determining fee percentage	1,000,000,000	'	1,000,000,000	'
Licensing Agreements [Member] | First $1,000,000,000 of combined net assets of the funds [Member] | Minimum [Member]	'	'	'	'
Fees Paid and Related Party Transactions [Line Items]	'	'	'	'
Combined assets basis for determining fee percentage	$1,000,000,000	'	$1,000,000,000	'
Licensing Agreements [Member] | Combined net assets above $1,000,000,000 [Member]	'	'	'	'
Fees Paid and Related Party Transactions [Line Items]	'	'	'	'
Fee percentage	'	'	0.02%	'
Licensing Agreements [Member] | On and after October 20, 2011 [Member]	'	'	'	'
Fees Paid and Related Party Transactions [Line Items]	'	'	'	'
Fee percentage	'	'	0.15%	'
Assets basis for determining fee percentage	'	'	'On all net assets	'

Contracts_and_Agreements_Addit

Contracts and Agreements (Additional Information) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Annual transfer agency services fee	'	'	$20,000	'
Brokerage commissions	9,866	14,218	29,833	51,603
Annualized percentage of average daily total net assets	'	'	0.07%	0.07%
Rebalancing Investments Transaction [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Brokerage commissions	'	'	28,818	46,678
Trades Necessitated By Creation And Redemption Activity [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Brokerage commissions	'	'	1,015	4,925
Maximum [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Transaction fees per transaction	'	'	15	'
Commissions per round-turn trade, including applicable exchange and NFA fees for Oil Futures Contracts and options on Oil Futures Contracts	'	'	15	'
Minimum [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Annual Fee for custody, fund accounting and fund administration services	'	'	75,000	'
Transaction fees per transaction	'	'	7	'
Commissions per round-turn trade, including applicable exchange and NFA fees for Oil Futures Contracts and options on Oil Futures Contracts	'	'	7	'
First $500 million of UGA's, USOF's, USNG's, US12OF's, USDHO's, USSO's, US12NG's, USBO's, USCI's, CPER's, USAG's and USMI's combined net assets [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Fee percentage	'	'	0.06%	'
First $500 million of UGA's, USOF's, USNG's, US12OF's, USDHO's, USSO's, US12NG's, USBO's, USCI's, CPER's, USAG's and USMI's combined net assets [Member] | Maximum [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Base amount for determining fee percentage	500,000,000	'	500,000,000	'
UGA's, USOF's, USNG's, US12OF's, USDHO's, USSO's, US12NG's, USBO's, USCI's, CPER's, USAG's and USMI's combined net assets greater than $500 million but less than $1 billion [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Fee percentage	'	'	0.05%	'
UGA's, USOF's, USNG's, US12OF's, USDHO's, USSO's, US12NG's, USBO's, USCI's, CPER's, USAG's and USMI's combined net assets greater than $500 million but less than $1 billion [Member] | Maximum [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Base amount for determining fee percentage	1,000,000,000	'	1,000,000,000	'
UGA's, USOF's, USNG's, US12OF's, USDHO's, USSO's, US12NG's, USBO's, USCI's, CPER's, USAG's and USMI's combined net assets exceed $1 billion [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Fee percentage	'	'	0.04%	'
UGA's, USOF's, USNG's, US12OF's, USDHO's, USSO's, US12NG's, USBO's, USCI's, CPER's, USAG's and USMI's combined net assets exceed $1 billion [Member] | Minimum [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Base amount for determining fee percentage	1,000,000,000	'	1,000,000,000	'
Marketing Agreement [Member] | Assets up to $3 billion [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Fee percentage	'	'	0.06%	'
Marketing Agreement [Member] | Assets up to $3 billion [Member] | Maximum [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Base amount for determining fee percentage	3,000,000,000	'	3,000,000,000	'
Marketing Agreement [Member] | Assets in excess of $3 billion [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Fee percentage	'	'	0.04%	'
Marketing Agreement [Member] | Assets in excess of $3 billion [Member] | Minimum [Member]	'	'	'	'
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]	'	'	'	'
Base amount for determining fee percentage	$3,000,000,000	'	$3,000,000,000	'

Financial_Instruments_OffBalan1

Financial Instruments, Off-Balance Sheet Risks and Contingencies (Additional Information) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]	'	'
Cash investments in money market funds	$42,494,983	$47,494,982
Deposits in domestic and foreign financial institutions	$9,492,143	$14,075,770

Financial_Highlights_Per_Unit_

Financial Highlights (Per Unit Performance Data and Other Supplemental Financial Data) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Feb. 26, 2008
Per Unit Operating Performance:	'		'		'
Net asset value, beginning of period	$58.39		$48.37		$50
Total income (loss)	($1.79)		$12.71		'
Net expenses	($0.41)		($0.35)		'
Net increase (decrease) in net asset value	($2.20)		$12.36		'
Net asset value, end of period	$56.19		$60.73		$50
Total Return	-3.77%		25.55%		'
Ratios to Average Net Assets	'		'		'
Total income (loss)	-0.43%		17.05%		'
Management fees	0.60%	[1]	0.60%	[1]	'
Total expenses excluding management fees	0.61%	[1]	0.36%	[1]	'
Expenses waived	-0.27%	[1]	-0.10%	[1]	'
Net expenses excluding management fees	0.33%	[1]	0.26%	[1]	'
Net income (loss)	-1.12%		16.41%		'
[1]	Annualized

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Valuation of Securities Using Fair Value Hierarchy) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Short-Term Investments [Member]	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'
Securities, fair value	$45,494,728	$51,194,826
Exchange-Traded Futures Contracts [Member] | U S [Member]	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'
Securities, fair value	-1,506,179	2,608,343
Fair Value, Inputs, Level 1 [Member] | Short-Term Investments [Member]	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'
Securities, fair value	45,494,728	51,194,826
Fair Value, Inputs, Level 1 [Member] | Exchange-Traded Futures Contracts [Member] | U S [Member]	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'
Securities, fair value	($1,506,179)	$2,608,343

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Fair Value of Derivative Instruments) (Details) (Commodity Contracts [Member], Futures [Member], Assets [Member], USD $)	Sep. 30, 2013	Dec. 31, 2012
Commodity Contracts [Member] | Futures [Member] | Assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivatives not Accounted for as Hedging Instruments	($1,506,179)	$2,608,343

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments (Effect of Derivative Instruments on Condensed Statements of Operations) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Realized Gain or (Loss) on Derivatives Recognized in Income	$952,430	$18,656,454	$3,844,332	$22,151,581
Change in Unrealized Gain or (Loss) on Derivatives Recognized in Income	'	'	-4,114,522	-4,990,671
Commodity Contracts [Member] | Futures [Member] | Realized gain (loss) on closed positions [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Realized Gain or (Loss) on Derivatives Recognized in Income	'	'	3,844,332	22,151,581
Commodity Contracts [Member] | Futures [Member] | Change in unrealized gain (loss) on open positions [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'
Change in Unrealized Gain or (Loss) on Derivatives Recognized in Income	'	'	($4,114,522)	($4,990,671)

Subsequent_Events_Additional_I

Subsequent Events (Additional Information) (Details) (USD $)	0 Months Ended		1 Months Ended
	2-May-13	Mar. 11, 2013	Sep. 27, 2011	Feb. 24, 2009	2-May-12
Loss Contingency, Damages Awarded, Value	$250,000	$150,000	$22,000,000	'	'
Loss Contingency Damages Suspended Value	'	100,000	'	'	'
Disgorgement Amount	'	300,000	6,600,000	'	'
Restitution Amount	'	'	'	'	2,900,000
Litigation Settlement Interest	'	'	1,800,000	'	'
Loss Contingency, Damages Paid, Value	'	'	'	$125,000	'