United States Oil Fund (USO) 10-K 24 Feb 17 2016 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 21, 2017	Jun. 30, 2016
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Entity Registrant Name	United States Oil Fund, LP
Entity Central Index Key	1,327,068
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 3,371,498,000
Trading Symbol	USO
Entity Common Stock, Shares Outstanding		253,800,000

Statements of Financial Conditi

Statements of Financial Condition - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents (Notes 2 and 5)	$ 2,920,517,807	$ 2,725,177,054
Equity in trading accounts:
Cash and cash equivalents	249,864,944	551,734,919
Unrealized gain (loss) on open commodity futures contracts	111,290,560	(138,508,060)
Receivable for shares sold	0	38,584,910
Dividends receivable	222,951	8,930
Prepaid registration fees	1,276,832	726,055
ETF transaction fees receivable	5,000	5,000
Total assets	3,283,178,094	3,177,728,808
Liabilities and Partners' Capital
Payable due to Broker	110,778,928	0
Payable for shares redeemed	66,943,788	52,855,674
General Partner management fees payable (Note 3)	1,256,212	1,179,092
Professional fees payable	1,829,494	1,205,862
Brokerage commissions payable	235,961	260,961
Directors' fees and insurance payable	26,116	42,863
License fees payable	150,926	114,603
Total liabilities	181,221,425	55,659,055
Commitments and Contingencies (Notes 3, 4 and 5)
Partners' Capital
General Partner	0	0
Limited Partners	3,101,956,669	3,122,069,753
Total Partners' Capital	3,101,956,669	3,122,069,753
Total liabilities and partners' capital	$ 3,283,178,094	$ 3,177,728,808
Limited Partners' shares outstanding	265,000,000	283,200,000
Net asset value per share	$ 11.71	$ 11.02
Market value per share	$ 11.72	$ 11

Schedule of Investments

Schedule of Investments	Dec. 31, 2016USD ($)Contract		Dec. 31, 2015USD ($)Contract
Unrealized Gain (Loss) on Open Commodity Contracts	$ 111,290,560		$ (138,508,060)
Open Futures Contracts - Long [Member] | United States [Member] | NYMEX WTI Crude Oil Futures CL November 2016 contracts, expiring January 2016 [Member]
Number of Contracts | Contract	57,744	[1]	84,290	[2]
Unrealized Gain (Loss) on Open Commodity Contracts	$ 111,290,560	[1]	$ (138,508,060)	[2]
% of Partners' Capital	3.59%	[1]	(4.44%)	[2]
Cash Equivalent [Member]
Market Value	$ 2,770,212,015		$ 2,468,495,664
% of Partners' Capital	89.31%		79.07%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.10%, 01/07/2016 [Member]
Principal Amount			$ 50,000,000
Market Value			$ 49,999,208
% of Partners' Capital			1.60%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.11%, 1/14/2016 [Member]
Principal Amount			$ 50,000,000
Market Value			$ 49,998,059
% of Partners' Capital			1.60%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.13%, 1/21/2016 [Member]
Principal Amount			$ 50,000,000
Market Value			$ 49,996,528
% of Partners' Capital			1.60%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.15%, 1/28/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,991,844
% of Partners' Capital			2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.19%, 2/04/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,986,896
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.22%, 2/11/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,981,635
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.20%, 2/18/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,980,000
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.20%, 2/25/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,977,656
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.23%, 3/03/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,970,615
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.26%, 3/10/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,963,344
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.24%, 3/17/2016 [Member]
Principal Amount			$ 50,000,000
Market Value			$ 49,974,667
% of Partners' Capital			1.60%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.09%, 3/24/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,985,302
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.07%, 3/31/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,987,812
% of Partners' Capital			2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.07%, 4/07/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,985,854
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.07%, 4/14/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,985,917
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.11%, 4/21/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,974,563
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.21%, 4/28/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,948,375
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.26%, 5/05/2016 [Member]
Principal Amount			$ 50,000,000
Market Value			$ 49,954,861
% of Partners' Capital			1.60%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.33%, 5/12/2016 [Member]
Principal Amount			$ 70,000,000
Market Value			$ 69,915,300
% of Partners' Capital			2.24%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.31%, 5/19/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,910,229
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.35%, 5/26/2016 [Member]
Principal Amount			$ 80,000,000
Market Value			$ 79,886,445
% of Partners' Capital			2.56%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 6/02/2016 [Member]
Principal Amount			$ 75,000,000
Market Value			$ 74,864,531
% of Partners' Capital			2.40%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.52%, 6/09/2016 [Member]
Principal Amount			$ 50,000,000
Market Value			$ 49,884,445
% of Partners' Capital			1.60%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.48%, 6/16/2016 [Member]
Principal Amount			$ 50,000,000
Market Value			$ 49,888,667
% of Partners' Capital			1.60%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 6/23/2016 [Member]
Principal Amount			$ 70,000,000
Market Value			$ 69,846,058
% of Partners' Capital			2.24%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.00%, 6/30/2016 [Member]
Principal Amount			$ 150,000,000
Market Value			$ 149,656,853
% of Partners' Capital			4.79%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.34%, 1/05/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,997,167
% of Partners' Capital	2.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.38%, 1/12/2017 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,994,194
% of Partners' Capital	1.61%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 1/19/2017 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,989,375
% of Partners' Capital	1.61%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.36%, 1/26/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,975,000
% of Partners' Capital	3.22%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.40%, 2/02/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,973,333
% of Partners' Capital	2.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.42%, 2/09/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,965,875
% of Partners' Capital	2.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 2/16/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,942,500
% of Partners' Capital	3.22%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 2/23/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,950,865
% of Partners' Capital	2.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 3/02/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,943,750
% of Partners' Capital	2.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.47%, 3/09/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,912,528
% of Partners' Capital	3.22%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.50%, 3/16/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,922,531
% of Partners' Capital	2.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 3/23/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,924,906
% of Partners' Capital	2.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 3/30/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,921,167
% of Partners' Capital	2.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 4/06/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,909,948
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.47%, 4/13/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,900,125
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 4/20/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,896,677
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.47%, 4/27/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,850,167
% of Partners' Capital	3.22%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.52%, 5/04/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,866,750
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.55%, 5/11/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,852,396
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.60%, 5/18/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,830,177
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.61%, 5/25/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,757,000
% of Partners' Capital	3.22%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.60%, 6/01/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,812,823
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.62%, 6/08/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,797,562
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.65%, 6/15/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,778,282
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.64%, 6/22/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,770,666
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.60%, 6/29/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,776,250
% of Partners' Capital	2.41%
Cash Equivalent [Member] | United States [Member] | US Treasury Securities [Member]
Market Value	$ 2,022,212,014		$ 1,843,495,664
% of Partners' Capital	65.19%		59.05%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member]
Market Value	$ 748,000,001		$ 625,000,000
% of Partners' Capital	24.12%		20.02%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Investments Money Market Funds - Government Portfolio [Member]
Principal Amount	$ 300,000,000		$ 200,000,000
Market Value	$ 300,000,000		$ 200,000,000
% of Partners' Capital	9.67%		6.41%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
Principal Amount	$ 200,000,001		$ 225,000,000
Market Value	$ 200,000,001		$ 225,000,000
% of Partners' Capital	6.45%		7.20%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Fund Government Portfolio [Member]
Principal Amount	$ 198,000,000		$ 200,000,000
Market Value	$ 198,000,000		$ 200,000,000
% of Partners' Capital	6.39%		6.41%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Wells Fargo Advantage Government Money Market Fund - Class I [Member]
Principal Amount	$ 50,000,000
Market Value	$ 50,000,000
% of Partners' Capital	1.61%
[1]	Collateral amounted to $249,864,944 on open futures contracts.
[2]	Collateral amounted to $551,734,919 on open futures contracts.

Schedule of Investments (Parent

Schedule of Investments (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Collateral Amount On Open Futures Contracts	$ 249,864,944	$ 551,734,919
United States [Member] | US Treasury Bill Securities One [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.34%	0.10%
Expiration date	1/05/2017	1/07/2016
United States [Member] | US Treasury Bill Securities Two [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.38%	0.11%
Expiration date	1/12/2017	1/14/2016
United States [Member] | US Treasury Bill Securities Three [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.43%	0.13%
Expiration date	1/19/2017	1/21/2016
United States [Member] | US Treasury Bill Securities Four [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.36%	0.15%
Expiration date	1/26/2017	1/28/2016
United States [Member] | US Treasury Bill Securities Five [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.40%	0.19%
Expiration date	2/02/2017	2/04/2016
United States [Member] | US Treasury Bill Securities Six [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.42%	0.22%
Expiration date	2/09/2017	2/11/2016
United States [Member] | US Treasury Bill Securities Seven [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.45%	0.20%
Expiration date	2/16/2017	2/18/2016
United States [Member] | US Treasury Bill Securities Eight [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.45%	0.20%
Expiration date	2/23/2017	2/25/2016
United States [Member] | US Treasury Bill Securities Nine [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.45%	0.23%
Expiration date	3/02/2017	3/03/2016
United States [Member] | US Treasury Bill Securities Ten [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.47%	0.26%
Expiration date	3/09/2017	3/10/2016
United States [Member] | US Treasury Bill Securities Eleven [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.50%	0.24%
Expiration date	3/16/2017	3/17/2016
United States [Member] | US Treasury Bill Securities Twelve [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.45%	0.09%
Expiration date	3/23/2017	3/24/2016
United States [Member] | US Treasury Bill Securities Thirteen [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.43%	0.07%
Expiration date	3/30/2017	3/31/2016
United States [Member] | US Treasury Bill Securities Fourteen [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.46%	0.07%
Expiration date	4/06/2017	4/07/2016
United States [Member] | US Treasury Bill Securities Fifteen [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.47%	0.07%
Expiration date	4/13/2017	4/14/2016
United States [Member] | US Treasury Bill Securities Sixteen [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.46%	0.11%
Expiration date	4/20/2017	4/21/2016
United States [Member] | US Treasury Bill Securities Seventeen [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.47%	0.21%
Expiration date	4/27/2017	4/28/2016
United States [Member] | US Treasury Bill Securities Eighteen [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.52%	0.26%
Expiration date	5/04/2017	5/05/2016
United States [Member] | US Treasury Bill Securities Nineteen [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.55%	0.33%
Expiration date	5/11/2017	5/12/2016
United States [Member] | US Treasury Bill Securities Twenty [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.60%	0.31%
Expiration date	5/18/2017	5/19/2016
United States [Member] | US Treasury Bill Securities Twenty One [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.61%	0.35%
Expiration date	5/25/2017	5/26/2016
United States [Member] | US Treasury Bill Securities Twenty Two [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.60%	0.43%
Expiration date	6/01/2017	6/02/2016
United States [Member] | US Treasury Bill Securities Twenty Three [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.62%	0.52%
Expiration date	6/08/2017	6/09/2016
United States [Member] | US Treasury Bill Securities Twenty Four [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.65%	0.48%
Expiration date	6/15/2017	6/16/2016
United States [Member] | US Treasury Bill Securities Twenty Five [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.64%	0.46%
Expiration date	6/22/2017	6/23/2016
United States [Member] | US Treasury Bill Securities Twenty Six [Member] | US Treasury Securities [Member] | Cash Equivalent [Member]
Interest rate	0.60%	0.00%
Expiration date	6/29/2017	6/30/2016

Statements of Operations

Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed futures contracts	$ 431,308,189	$ (1,300,519,431)	$ (314,354,470)
Change in unrealized gain (loss) on open futures contracts	249,798,620	29,109,870	(170,342,900)
Realized gain (loss) on short-term investments	14,302	(1,458)	0
Dividend income	2,090,136	75,426	63,583
Interest income	8,864,931	1,692,164	182,708
ETF transaction fees	343,000	348,000	276,000
Total income (loss)	692,419,178	(1,269,295,429)	(484,175,079)
Expenses
General Partner management fees (Note 3)	15,146,837	11,638,694	3,197,210
Professional fees	2,626,030	1,345,741	622,903
Brokerage commissions	6,875,314	5,196,820	988,505
Directors' fees and insurance	373,311	298,255	181,613
License fees	504,895	387,957	106,574
Registration fees	339,981	250,024	1,350
Total expenses	25,866,368	19,117,491	5,098,155
Net income (loss)	$ 666,552,810	$ (1,288,412,920)	$ (489,273,234)
Net income (loss) per limited partnership share (in dollars per share)	$ 0.69	$ (9.13)	$ (15.08)
Net income (loss) per weighted average limited partnership share (in dollars per share)	$ 2.07	$ (7.93)	$ (22.27)
Weighted average limited partnership shares outstanding (in shares)	322,665,574	162,412,877	21,970,685

Statements of Changes in Partne

Statements of Changes in Partners' Capital - USD ($)	Total	General Partner [Member]	Limited Partners [Member]
Beginning Balance at Dec. 31, 2013	$ 574,277,054	$ 0	$ 574,277,054
Addition of partnership shares	5,187,835,835	0	5,187,835,835
Redemption of partnership shares	(3,995,159,782)	0	(3,995,159,782)
Net income (loss)	(489,273,234)	0	(489,273,234)
Ending Balance at Dec. 31, 2014	$ 1,277,679,873	0	1,277,679,873
Net asset value, beginning of year at Dec. 31, 2013	$ 35.23
Net asset value, end of year at Dec. 31, 2014	$ 20.15
Addition of partnership shares	$ 9,173,312,546	0	9,173,312,546
Redemption of partnership shares	(6,040,509,746)	0	(6,040,509,746)
Net income (loss)	(1,288,412,920)	0	(1,288,412,920)
Ending Balance at Dec. 31, 2015	$ 3,122,069,753	0	3,122,069,753
Net asset value, end of year at Dec. 31, 2015	$ 11.02
Addition of partnership shares	$ 4,450,820,824	0	4,450,820,824
Redemption of partnership shares	(5,137,486,718)	0	(5,137,486,718)
Net income (loss)	666,552,810	0	666,552,810
Ending Balance at Dec. 31, 2016	$ 3,101,956,669	$ 0	$ 3,101,956,669
Net asset value, end of year at Dec. 31, 2016	$ 11.71

Statements of Changes in Partn7

Statements of Changes in Partners' Capital (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Addition of partnership units	456,900,000	573,900,000	166,500,000
Redemption of partnership units	475,100,000	354,100,000	119,400,000

Statements of Cash Flows

Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows from Operating Activities:
Net income (loss)	$ 666,552,810	$ (1,288,412,920)	$ (489,273,234)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	301,869,975	(276,673,230)	(254,254,816)
Unrealized (gain) loss on open futures contracts	(249,798,620)	(29,109,870)	170,342,900
(Increase) decrease in dividends receivable	(214,021)	(3,836)	2,875
(Increase) decrease in interest receivable	0	0	52
(Increase) decrease in prepaid registration fees	(550,777)	(726,055)	0
(Increase) decrease in ETF transaction fees receivable	0	(2,000)	1,000
Increase (decrease) in payable due to Broker	110,778,928	0	0
Increase (decrease) in General Partner management fees payable	77,120	775,792	148,579
Increase (decrease) in professional fees payable	623,632	305,047	(329,999)
Increase (decrease) in brokerage commissions payable	(25,000)	187,300	54,000
Increase (decrease) in directors' fees and insurance payable	(16,747)	21,083	899
Increase (decrease) in license fees payable	36,323	78,464	4,294
Increase (decrease) in registration fees payable	0	0	(153)
Net cash provided by (used in) operating activities	829,333,623	(1,593,560,225)	(573,303,603)
Cash Flows from Financing Activities:
Addition of partnership shares	4,489,405,734	9,185,457,218	5,182,907,528
Redemption of partnership shares	(5,123,398,604)	(6,005,791,475)	(4,041,408,175)
Net cash provided by (used in) financing activities	(633,992,870)	3,179,665,743	1,141,499,353
Net Increase (Decrease) in Cash and Cash Equivalents	195,340,753	1,586,105,518	568,195,750
Cash and Cash Equivalents, beginning of year	2,725,177,054	1,139,071,536	570,875,786
Cash and Cash Equivalents, end of year	$ 2,920,517,807	$ 2,725,177,054	$ 1,139,071,536

ORGANIZATION AND BUSINESS

ORGANIZATION AND BUSINESS	12 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business	NOTE 1 - ORGANIZATION AND BUSINESS The United States Oil Fund, LP (“USO”) was organized as a limited partnership under the laws of the state of Delaware on May 12, 2005. USO is a commodity pool that issues limited partnership shares (“shares”) that may be purchased and sold on the NYSE Arca, Inc. (the “NYSE Arca”). Prior to November 25, 2008, USO’s shares traded on the American Stock Exchange (the “AMEX”). USO will continue in perpetuity, unless terminated sooner upon the occurrence of one or more events as described in its Sixth Amended and Restated Agreement of Limited Partnership dated as of March 1, 2013 (the “LP Agreement”). The investment objective of USO is for the daily changes in percentage terms of its shares’ per share net asset value (“NAV”) to reflect the daily changes in percentage terms of the spot price of light, sweet crude oil delivered to Cushing, Oklahoma, as measured by the daily changes in the price of the futures contract for light, sweet crude oil 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 it will be measured by the futures contract that is the next month contract to expire (the “Benchmark Oil Futures Contract”), less USO’s expenses. USO’s investment objective is not nor greater than one day United States Commodity Funds LLC (“USCF”), the general partner of USO, believes that it is not practical to manage the portfolio to achieve such an investment goal when investing in Oil Futures Contracts (as defined below) and Other Oil-Related Investments (as defined below). USO accomplishes its objective through investments in futures contracts for light, sweet crude oil, and other types of crude oil, diesel-heating oil, gasoline, natural gas and other petroleum-based fuels that are traded on the NYMEX, ICE Futures or other U.S. and foreign exchanges (collectively, “Oil Futures Contracts”) and other oil related investments such as cash-settled options on Oil Futures Contracts, forward contracts for oil, cleared swap contracts and over-the-counter (“OTC”) transactions that are based on the price of crude oil, diesel-heating oil, gasoline, natural gas and other petroleum-based fuels, Oil Futures Contracts and indices based on the foregoing (collectively, “Other Oil-Related Investments”). As of December 31, 2016, USO held 57,744 USO commenced investment operations on April 10, 2006 and has a fiscal year ending on December 31. USCF is responsible for the management of USO. USCF is a member of the National Futures Association (the “NFA”) and became registered as a commodity pool operator with the Commodity Futures Trading Commission (the “CFTC”) effective December 1, 2005 and a swaps firm on August 8, 2013. USCF is also the general partner of the United States Natural Gas Fund, LP (“UNG”), the United States 12 Month Oil Fund, LP (“USL”), the United States Gasoline Fund, LP (“UGA”) and the United States Diesel-Heating Oil Fund, LP (“UHN”), which listed their limited partnership shares on the AMEX under the ticker symbols “UNG” on April 18, 2007, “USL” on December 6, 2007, “UGA” on February 26, 2008 and “UHN” on April 9, 2008, respectively. As a result of the acquisition of the AMEX by NYSE Euronext, each of UNG’s, USL’s, UGA’s and UHN’s shares commenced trading on the NYSE Arca on November 25, 2008. USCF is also the general partner of the United States Short Oil Fund, LP (“DNO”), the United States 12 Month Natural Gas Fund, LP (“UNL”) and the United States Brent Oil Fund, LP (“BNO”), which listed their limited partnership shares 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 USCF Canadian Crude Oil Index Fund (“UCCO”), each a series of the United States Commodity Index Funds Trust. USCI, CPER and USAG listed their shares on the NYSE Arca under the ticker symbol “USCI” on August 10, 2010, “CPER” on November 15, 2011 and “USAG” on April 13, 2012, respectively. UCCO is currently in registration. All funds listed previously, other than UCCO, are referred to collectively herein as the “Related Public Funds.” In addition, USCF is the sponsor of the USCF Funds Trust, a Delaware statutory trust, and each of its series, the REX S&P MLP Fund, the REX S&P MLP Inverse Fund, the United States 3X Oil Fund and the United States 3X Short Oil Fund, all of which are funds that are currently in registration and have not commenced operations. The funds that are series of the USCF Funds Trust (the “REX Funds”) are not included in the Related Public Funds. USO issues shares to certain authorized purchasers (“Authorized Participants”) by offering baskets consisting of 100,000 In addition, Authorized Participants pay USO a $ 1,000 100,000 In April 2006, USO initially registered 17,000,000 67.39 200,000 13,479,000 3,127,000,000

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) as detailed in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification. USO is an investment company and follows the accounting and reporting guidance in FASB Topic 946. 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 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 financial statements. Changes in the unrealized gains or losses between periods are reflected in the statements of operations. USO earns income on funds held at the custodian or futures commission merchant (“FCM”) at prevailing market rates earned on such investments. Brokerage commissions on all open commodity futures contracts are accrued on a full-turn basis. USO 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 U.S. GAAP, USO 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. USO files an income tax return in the U.S. federal jurisdiction, and may file income tax returns in various U.S. states. USO is not subject to income tax return examinations by major taxing authorities for years before 2013. 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 USO recording a tax liability that reduces net assets. However, USO’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. USO 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 year ended December 31, 2016. Authorized Participants may purchase Creation Baskets or redeem Redemption Baskets only in blocks of 100,000 USO receives or pays the proceeds from shares sold or redeemed within three business days after the trade date of the purchase or redemption. The amounts due from Authorized Participants are reflected in USO’s statements of financial condition as receivable for shares sold, and amounts payable to Authorized Participants upon redemption are reflected as payable for shares redeemed. Authorized Participants pay USO a transaction fee of $ 1,000 Profit or loss shall be allocated among the partners of USO in proportion to the number of shares 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. USO’s per share 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 shares outstanding. USO 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 share is the difference between the per share NAV at the beginning of each period and at the end of each period. The weighted average number of shares outstanding was computed for purposes of disclosing net income (loss) per weighted average share. The weighted average shares are equal to the number of shares outstanding at the end of the period, adjusted proportionately for shares added and redeemed based on the amount of time the shares were outstanding during such period. There were no shares held by USCF at December 31, 2016. Offering costs incurred in connection with the registration of additional shares after the initial registration of shares are borne by USO. 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 include money market funds and overnight deposits or time deposits with original maturity dates of six months or less. Certain amounts in the accompanying financial statements were reclassified to conform to the current presentation. The preparation of financial statements in conformity with U.S. 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 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 RELAT

FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2016
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 USO in accordance with the objectives and policies of USO. In addition, USCF has arranged for one or more third parties to provide administrative, custody, accounting, transfer agency and other necessary services to USO. For these services, USO is contractually obligated to pay USCF a fee, which is paid monthly, equal to 0.45% per annum of average daily total net assets. Ongoing Registration Fees and Other Offering Expenses USO pays all costs and expenses associated with the ongoing registration of its shares subsequent to the initial offering. These costs include registration or other fees paid to regulatory agencies in connection with the offer and sale of shares, and all legal, accounting, printing and other expenses associated with such offer and sale. For the years ended December 31, 2016, 2015 and 2014, USO incurred $ 339,981 250,024 1,350 Independent Directors’ and Officers’ Expenses USO is responsible for paying its portion of the directors’ and officers’ liability insurance for USO and the Related Public Funds and the fees and expenses of the independent directors who also serve as audit committee members of USO and the Related Public Funds. USO 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 ended December 31, 2016 were $ 582,050 373,311 569,303 298,255 567,863 181,613 Licensing Fees As discussed in Note 4 below, USO entered into a licensing agreement with the NYMEX on April 10, 2006, as amended on October 20, 2011. Pursuant to the agreement, USO and the Related Public Funds, other than BNO, USCI, CPER and USAG, pay a licensing fee that is equal to 0.015 504,895 387,957 106,574 Investor Tax Reporting Cost The fees and expenses associated with USO’s audit expenses and tax accounting and reporting requirements are paid by USO. These costs were approximately $ 2,200,000 1,400,000 600,000 Other Expenses and Fees In addition to the fees described above, USO pays all brokerage fees and other expenses in connection with the operation of USO, excluding costs and expenses paid by USCF as outlined in Note 4 – Contracts and Agreements

CONTRACTS AND AGREEMENTS

CONTRACTS AND AGREEMENTS	12 Months Ended
	Dec. 31, 2016
Contractors [Abstract]
Contracts And Agreements	NOTE 4 - CONTRACTS AND AGREEMENTS Marketing Agent Agreement USO is party to a marketing agent agreement, dated as of March 13, 2006, as amended from time to time, with the Marketing Agent and USCF, whereby the Marketing Agent provides certain marketing services for USO as outlined in the agreement. The fees of the Marketing Agent, which are borne by USCF, include a marketing fee of $ 425,000 0.00 0 500 0.04 500 4 0.03 4 10 The above fees do not include website construction and development, which are also borne by USCF. Brown Brothers Harriman & Co. Agreements USO is also party to a custodian agreement, dated March 13, 2006, as amended from time to time, with Brown Brothers Harriman & Co. (“BBH&Co.”) and USCF, whereby BBH&Co. holds investments on behalf of USO. USCF pays the fees of the custodian, which are determined by the parties from time to time. In addition, USO is party to an administrative agency agreement, dated March 13, 2006, as amended from time to time, with USCF and BBH&Co., whereby BBH&Co. acts as the administrative agent, transfer agent and registrar for USO. 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 20,000 0.06 500 0.0465 500 1 0.035 1 7 15 Brokerage and Futures Commission Merchant Agreements On October 8, 2013, USO entered into a brokerage agreement with RBC Capital Markets, LLC (“RBC Capital” or “RBC”) to serve as USO’s FCM effective October 10, 2013. The agreement with RBC requires it to provide services to USO in connection with the purchase and sale of Oil Futures Contracts and Other Oil-Related Investments that may be purchased and sold by or through RBC Capital for USO’s account. In accordance with the agreement, RBC Capital charges USO commissions of approximately $ 7 8 For the Year For the Year For the Year Ended Ended Ended December 31, December 31, December 31, 2016 2015 2014 Total commissions accrued to brokers $ 6,875,314 $ 5,196,820 $ 988,505 Total commissions as an annualized percentage of average total net assets 0.20 % 0.20 % 0.14 % Commissions accrued as a result of rebalancing $ 6,297,055 $ 4,288,005 $ 685,780 Percentage of commissions accrued as a result of rebalancing 91.59 % 82.51 % 69.38 % Commissions accrued as a result of creation and redemption activity $ 578,259 $ 908,815 $ 302,725 Percentage of commissions accrued as a result of creation and redemption activity 8.41 % 17.49 % 30.62 % The increase in total commissions accrued to brokers was due primarily to a higher number of futures contracts held and traded as a result of USO’s larger total net assets during the year ended December 31, 2016, as compared to the year ended December 31, 2015. The increase in the total commissions accrued to brokers for the year ended December 31, 2015 as compared to the year ended December 31, 2014, was due primarily to a higher number of futures contracts held and traded. However, there can be no assurance that commission costs and portfolio turnover will not cause commission expenses to rise in future quarters. NYMEX Licensing Agreement USO and the NYMEX entered into a licensing agreement on April 10, 2006, as amended on October 20, 2011, whereby USO was granted a non-exclusive license to use certain of the NYMEX’s settlement prices and service marks. Under the licensing agreement, USO and the Related Public Funds, other than BNO, USCI, CPER, and USAG, pay the NYMEX an asset-based fee for the license, the terms of which are described in Note 3. USO expressly disclaims any association with the NYMEX or endorsement of USO by the NYMEX and acknowledges that “NYMEX” and “New York Mercantile Exchange” are registered trademarks of the NYMEX.

FINANCIAL INSTRUMENTS, OFF-BALA

FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2016
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 USO may engage in the trading of futures contracts, options on futures contracts and swaps (collectively, “derivatives”). USO 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. USO 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. Cleared swaps are agreements that are eligible to be cleared by a clearinghouse, e.g., ICE Clear Europe, and provide the efficiencies and benefits that centralized clearing on an exchange offers to traders of futures contracts, including credit risk intermediation and the ability to offset positions initiated with different counterparties. The purchase and sale of futures contracts, options on futures contracts and swaps require margin deposits with an FCM. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act requires an FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. Futures contracts, options on 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 USO 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. Buying and selling options on futures contracts exposes investors to the risks of purchasing or selling futures contracts. All of the futures contracts held by USO through December 31, 2016 were exchange-traded. The risks associated with exchange-traded contracts are generally perceived to be less than those associated with OTC swaps since, in OTC swaps, a party must rely solely on the credit of its respective individual counterparties. However, in the future, if USO 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. USO 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, USO bears the risk of financial failure by the clearing broker. USO’s cash and other property, such as Treasuries, deposited with an FCM are considered commingled with all other customer funds, subject to the FCM’s segregation requirements. In the event of an FCM’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 an FCM could result in the complete loss of USO’s assets posted with that FCM; however, the majority of USO’s assets are held in cash and/or cash equivalents with USO’s custodian and would not be impacted by the insolvency of an FCM. The failure or insolvency of USO’s custodian, however, could result in a substantial loss of USO’s assets. USCF invests a portion of USO’s cash in money market funds that seek to maintain a stable per share NAV. USO is exposed to any risk of loss associated with an investment in such money market funds. As of December 31, 2016 and December 31, 2015, USO held investments in money market funds in the amounts of $ 748,000,001 625,000,000 2,422,382,750 2,651,911,973 For derivatives, risks arise from changes in the market value of the contracts. Theoretically, USO 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, USO 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. USO’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, USO 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 USO are reported in its 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	12 Months Ended
	Dec. 31, 2016
Financial Highlights [Abstract]
Financial Highlights	NOTE 6 - FINANCIAL HIGHLIGHTS Year ended Year ended Year ended December 31, December 31, December 31, 2016 2015 2014 Per Share Operating Performance: Net asset value, beginning of year $ 11.02 $ 20.15 $ 35.23 Total income (loss) 0.77 (9.01) (14.85) Total expenses (0.08) (0.12) (0.23) Net increase (decrease) in net asset value 0.69 (9.13) (15.08) Net asset value, end of year $ 11.71 $ 11.02 $ 20.15 Total Return 6.26 % (45.31) % (42.80) % Ratios to Average Net Assets Total income (loss) 20.57 % (49.08) % (68.15) % Expenses excluding management fees 0.32 % 0.29 % 0.27 % Management fees 0.45 % 0.45 % 0.45 % Net income (loss) 19.80 % (49.82) % (68.86) % Total returns are calculated based on the change in value during the period. An individual shareholder’s total return and ratio may vary from the above total returns and ratios based on the timing of contributions to and withdrawals from USO.

QUARTERLY FINANCIAL DATA (Unaud

QUARTERLY FINANCIAL DATA (Unaudited)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	NOTE 7 - QUARTERLY FINANCIAL DATA (Unaudited) First Quarter Second Quarter Third Quarter Fourth Quarter 2016 2016 2016 2016 Total Income (Loss) $ (171,852,015) $ 647,936,099 $ (78,243,696) $ 294,578,790 Total Expenses 7,120,977 6,509,218 6,111,165 6,125,008 Net Income (Loss) $ (178,972,992) $ 641,426,881 $ (84,354,861) $ 288,453,782 Net Income (Loss) per Share $ (1.28) $ 1.82 $ (0.56) $ 0.71 First Quarter Second Quarter Third Quarter Fourth Quarter 2015 2015 2015 2015 Total Income (Loss) $ (272,571,845) $ 509,753,001 $ (672,333,075) $ (834,143,510) Total Expenses 4,118,398 4,493,649 4,671,346 5,834,098 Net Income (Loss) $ (276,690,243) $ 505,259,352 $ (677,004,421) $ (839,977,608) Net Income (Loss) per Share $ (3.28) $ 3.06 $ (5.36) $ (3.55)

FAIR VALUE OF FINANCIAL INSTRUM

FAIR VALUE OF FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Of Financial Instruments	NOTE 8 - FAIR VALUE OF FINANCIAL INSTRUMENTS USO 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 USO (observable inputs) and (2) USO’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 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. Total Level I Level II Level III At December 31, 2016 Short-Term Investments $ 2,770,212,015 $ 2,770,212,015 $ — $ — Exchange-Traded Futures Contracts United States Contracts 111,290,560 111,290,560 — — During the year ended December 31, 2016, there were no transfers between Level I and Level II. Total Level I Level II Level III At December 31, 2015 Short-Term Investments $ 2,468,495,664 $ 2,468,495,664 $ — $ — Exchange-Traded Futures Contracts United States Contracts (138,508,060) (138,508,060) — — During the year ended December 31, 2015, there were no transfers between Level I and Level II. Effective January 1, 2009, USO 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. Derivatives not Accounted for Statements of Financial Fair Value At Fair Value At as Hedging Instruments Condition Location December 31, 2016 December 31, 2015 Futures - Commodity Contracts Assets $ 111,290,560 $ (138,508,060) For the year ended For the year ended For the year ended December 31, 2016 December 31, 2015 December 31, 2014 Change in Change in Change in Unrealized Realized Unrealized Realized Unrealized Derivatives Location of Realized Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) not Accounted Gain (Loss) Gain (Loss) on on on on on for as on Derivatives on Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Hedging Recognized Recognized in Recognized Recognized Recognized Recognized Recognized Instruments in Income Income in Income in Income in Income in Income in Income Futures - Commodity Contracts Realized gain (loss) on closed positions $ 431,308,189 $ (1,300,519,431) $ (314,354,470) Change in unrealized gain (loss) on open positions $ 249,798,620 $ 29,109,870 $ (170,342,900)

RECENT ACCOUNTING PRONOUNCEMENT

RECENT ACCOUNTING PRONOUNCEMENTS	12 Months Ended
	Dec. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	NOTE 9 - RECENT ACCOUNTING PRONOUNCEMENTS In August 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2015-14, Revenue from Contracts with Customers, modifying ASU 2014-09. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2015-14 is effective for fiscal years beginning on or after December 15, 2016, and interim periods within those annual periods. Early application is permitted. At this time, management does not believe there will be any impact to the Fund’s financial statements.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	NOTE 10 - SUBSEQUENT EVENTS USO has performed an evaluation of subsequent events through the date the financial statements were issued. This evaluation did not result in any subsequent events that necessitated disclosures and/or adjustments.

SUMMARY OF SIGNIFICANT ACCOUN19

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) as detailed in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification. USO is an investment company and follows the accounting and reporting guidance in FASB Topic 946.
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 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 financial statements. Changes in the unrealized gains or losses between periods are reflected in the statements of operations. USO earns income on funds held at the custodian or futures commission merchant (“FCM”) 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	USO 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 U.S. GAAP, USO 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. USO files an income tax return in the U.S. federal jurisdiction, and may file income tax returns in various U.S. states. USO is not subject to income tax return examinations by major taxing authorities for years before 2013. 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 USO recording a tax liability that reduces net assets. However, USO’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. USO 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 year ended December 31, 2016.
Creations and Redemptions	Creations and Redemptions Authorized Participants may purchase Creation Baskets or redeem Redemption Baskets only in blocks of 100,000 USO receives or pays the proceeds from shares sold or redeemed within three business days after the trade date of the purchase or redemption. The amounts due from Authorized Participants are reflected in USO’s statements of financial condition as receivable for shares sold, and amounts payable to Authorized Participants upon redemption are reflected as payable for shares redeemed. Authorized Participants pay USO a transaction fee of $ 1,000
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 USO in proportion to the number of shares 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 Share Net Asset Value (''NAV'')	Calculation of Per Share Net Asset Value (“NAV”) USO’s per share 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 shares outstanding. USO 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 Share	Net Income (Loss) Per Share Net income (loss) per share is the difference between the per share NAV at the beginning of each period and at the end of each period. The weighted average number of shares outstanding was computed for purposes of disclosing net income (loss) per weighted average share. The weighted average shares are equal to the number of shares outstanding at the end of the period, adjusted proportionately for shares added and redeemed based on the amount of time the shares were outstanding during such period. There were no shares held by USCF at December 31, 2016.
Offering Costs	Offering Costs Offering costs incurred in connection with the registration of additional shares after the initial registration of shares are borne by USO. 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 financial statements were reclassified to conform to the current presentation.
Use of Estimates	The preparation of financial statements in conformity with U.S. 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 financial statements, and the reported amounts of the revenue and expenses during the reporting period. Actual results may differ from those estimates and assumptions.

CONTRACTS AND AGREEMENTS (Table

CONTRACTS AND AGREEMENTS (Tables)	12 Months Ended
	Dec. 31, 2016
Contractors [Abstract]
Brokerage Commission	USO also incurs commissions to brokers for the purchase and sale of Oil Futures Contracts, Other Oil-Related Investments or short-term obligations of the United States of two years or less (“Treasuries”). For the Year For the Year For the Year Ended Ended Ended December 31, December 31, December 31, 2016 2015 2014 Total commissions accrued to brokers $ 6,875,314 $ 5,196,820 $ 988,505 Total commissions as an annualized percentage of average total net assets 0.20 % 0.20 % 0.14 % Commissions accrued as a result of rebalancing $ 6,297,055 $ 4,288,005 $ 685,780 Percentage of commissions accrued as a result of rebalancing 91.59 % 82.51 % 69.38 % Commissions accrued as a result of creation and redemption activity $ 578,259 $ 908,815 $ 302,725 Percentage of commissions accrued as a result of creation and redemption activity 8.41 % 17.49 % 30.62 %

FINANCIAL HIGHLIGHTS (Tables)

FINANCIAL HIGHLIGHTS (Tables)	12 Months Ended
	Dec. 31, 2016
Financial Highlights [Abstract]
Per Unit Performance Data And Other Supplemental Financial Data	The following table presents per share performance data and other supplemental financial data for the years ended December 31, 2016, 2015 and 2014. This information has been derived from information presented in the financial statements. Year ended Year ended Year ended December 31, December 31, December 31, 2016 2015 2014 Per Share Operating Performance: Net asset value, beginning of year $ 11.02 $ 20.15 $ 35.23 Total income (loss) 0.77 (9.01) (14.85) Total expenses (0.08) (0.12) (0.23) Net increase (decrease) in net asset value 0.69 (9.13) (15.08) Net asset value, end of year $ 11.71 $ 11.02 $ 20.15 Total Return 6.26 % (45.31) % (42.80) % Ratios to Average Net Assets Total income (loss) 20.57 % (49.08) % (68.15) % Expenses excluding management fees 0.32 % 0.29 % 0.27 % Management fees 0.45 % 0.45 % 0.45 % Net income (loss) 19.80 % (49.82) % (68.86) %

QUARTERLY FINANCIAL DATA (Una22

QUARTERLY FINANCIAL DATA (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Summarized (unaudited) quarterly financial information	The following summarized (unaudited) quarterly financial information presents the results of operations and other data for three-month periods ended March 31, June 30, September 30 and December 31, 2016 and 2015. First Quarter Second Quarter Third Quarter Fourth Quarter 2016 2016 2016 2016 Total Income (Loss) $ (171,852,015) $ 647,936,099 $ (78,243,696) $ 294,578,790 Total Expenses 7,120,977 6,509,218 6,111,165 6,125,008 Net Income (Loss) $ (178,972,992) $ 641,426,881 $ (84,354,861) $ 288,453,782 Net Income (Loss) per Share $ (1.28) $ 1.82 $ (0.56) $ 0.71 First Quarter Second Quarter Third Quarter Fourth Quarter 2015 2015 2015 2015 Total Income (Loss) $ (272,571,845) $ 509,753,001 $ (672,333,075) $ (834,143,510) Total Expenses 4,118,398 4,493,649 4,671,346 5,834,098 Net Income (Loss) $ (276,690,243) $ 505,259,352 $ (677,004,421) $ (839,977,608) Net Income (Loss) per Share $ (3.28) $ 3.06 $ (5.36) $ (3.55)

FAIR VALUE OF FINANCIAL INSTR23

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Valuation of Securities Using Fair Value Hierarchy	The following table summarizes the valuation of USO’s securities at December 31, 2016 using the fair value hierarchy: Total Level I Level II Level III At December 31, 2016 Short-Term Investments $ 2,770,212,015 $ 2,770,212,015 $ — $ — Exchange-Traded Futures Contracts United States Contracts 111,290,560 111,290,560 — — The following table summarizes the valuation of USO’s securities at December 31, 2015 using the fair value hierarchy: Total Level I Level II Level III At December 31, 2015 Short-Term Investments $ 2,468,495,664 $ 2,468,495,664 $ — $ — Exchange-Traded Futures Contracts United States Contracts (138,508,060) (138,508,060) — —
Fair Value of Derivative Instruments	Fair Value of Derivative Instruments Derivatives not Accounted for Statements of Financial Fair Value At Fair Value At as Hedging Instruments Condition Location December 31, 2016 December 31, 2015 Futures - Commodity Contracts Assets $ 111,290,560 $ (138,508,060)
Effect of Derivative Instruments on Condensed Statements of Operations	The Effect of Derivative Instruments on the Statements of Operations For the year ended For the year ended For the year ended December 31, 2016 December 31, 2015 December 31, 2014 Change in Change in Change in Unrealized Realized Unrealized Realized Unrealized Derivatives Location of Realized Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) not Accounted Gain (Loss) Gain (Loss) on on on on on for as on Derivatives on Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Hedging Recognized Recognized in Recognized Recognized Recognized Recognized Recognized Instruments in Income Income in Income in Income in Income in Income in Income Futures - Commodity Contracts Realized gain (loss) on closed positions $ 431,308,189 $ (1,300,519,431) $ (314,354,470) Change in unrealized gain (loss) on open positions $ 249,798,620 $ 29,109,870 $ (170,342,900)

ORGANIZATION AND BUSINESS (Addi

ORGANIZATION AND BUSINESS (Additional Information) (Detail)	Apr. 10, 2006USD ($)$ / sharesshares	Dec. 31, 2016Contract$ / shares$ / Unitshares		Dec. 31, 2015Contract$ / shares		Dec. 31, 2014$ / shares	Dec. 31, 2013$ / shares
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit		1,000
Limited Partners' Capital Account, Units Authorized	17,000,000	3,127,000,000
Limited Partners' Capital Account, Units Issued	200,000
Net asset value per unit | $ / shares	$ 67.39	$ 11.71		$ 11.02		$ 20.15	$ 35.23
Value of units issued | $	$ 13,479,000
Creation Baskets [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of units per basket		100,000
Redemption Baskets [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of units per basket		100,000
Open Futures Contracts, Long [Member] | United States [Member] | NYMEX WTI Crude Oil Futures CL November 2016 contracts, expiring October 2016 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Contracts | Contract		57,744	[1]	84,290	[2]
[1]	Collateral amounted to $249,864,944 on open futures contracts.
[2]	Collateral amounted to $551,734,919 on open futures contracts.

SUMMARY OF SIGNIFICANT ACCOUN25

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Detail)	12 Months Ended
	Dec. 31, 2016$ / Unitshares
Significant Accounting Policies [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit	1,000
Maximum [Member]
Significant Accounting Policies [Line Items]
Cash equivalents maturity period	6 months
Creations and Redemptions Basket [Member]
Significant Accounting Policies [Line Items]
Number of units per basket | shares	100,000

FEES PAID BY THE FUND AND REL26

FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Additional Information) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fees Paid And Related Party Transactions [Line Items]
USCF Management Fee	USO is contractually obligated to pay USCF a fee, which is paid monthly, equal to 0.45% per annum of average daily total net assets.
Ongoing Registration Fees and Other Offering Expenses	$ 339,981	$ 250,024	$ 1,350
Fees and expenses	373,311	298,255	181,613
Licensing fee incurred	504,895	387,957	106,574
Estimated investor tax reporting cost	2,200,000	1,400,000	600,000
USO And Related Public Funds [Member]
Fees Paid And Related Party Transactions [Line Items]
Fees and expenses	582,050	569,303	567,863
USO [Member]
Fees Paid And Related Party Transactions [Line Items]
Ongoing Registration Fees and Other Offering Expenses	339,981	250,024	1,350
Fees and expenses	373,311	298,255	181,613
Licensing fee incurred	$ 504,895	$ 387,957	$ 106,574
Licensing Agreements [Member]
Fees Paid And Related Party Transactions [Line Items]
Fee percentage	0.015%

CONTRACTS AND AGREEMENTS (Broke

CONTRACTS AND AGREEMENTS (Brokerage Commission) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Brokerage commissions	$ 6,875,314	$ 5,196,820	$ 988,505
Commission [Member]
Brokerage commissions	$ 6,875,314	$ 5,196,820	$ 988,505
Percentage of average daily net assets	0.20%	0.20%	0.14%
Rebalancing Investments Transaction [Member]
Brokerage commissions	$ 6,297,055	$ 4,288,005	$ 685,780
Percentage of average daily net assets	91.59%	82.51%	69.38%
Creation And Redemption Activity [Member]
Brokerage commissions	$ 578,259	$ 908,815	$ 302,725
Percentage of average daily net assets	8.41%	17.49%	30.62%

CONTRACTS AND AGREEMENTS (Addit

CONTRACTS AND AGREEMENTS (Additional Information) (Detail)	12 Months Ended
	Dec. 31, 2016USD ($)$ / Unit
Marketing Agreement [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Marketing fee exclusive of the incentive fee	$ 425,000
Marketing Agreement [Member] | USOF's assets from $0- $500 million [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	0.00%
Marketing Agreement [Member] | USOF's assets from $0- $500 million [Member] | Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 0
Marketing Agreement [Member] | USOF's assets from $0- $500 million [Member] | Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 500,000,000
Marketing Agreement [Member] | USOF's assets from $500 million - $4 billion [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	0.04%
Marketing Agreement [Member] | USOF's assets from $500 million - $4 billion [Member] | Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 500,000,000
Marketing Agreement [Member] | USOF's assets from $500 million - $4 billion [Member] | Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 4,000,000,000
Marketing Agreement [Member] | USOF's assets in excess of $4 billion [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	0.03%
Ratio of expense to Average Net Assets	10.00%
Marketing Agreement [Member] | USOF's assets in excess of $4 billion [Member] | Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 4,000,000,000
Brown Brothers Harriman & Co. Agreements [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Annual fee for transfer agency services	20,000
Brown Brothers Harriman & Co. Agreements [Member] | 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 | $ / Unit	7
Brown Brothers Harriman & Co. Agreements [Member] | Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Transaction fees per transaction | $ / Unit	15
Brown Brothers Harriman & Co. Agreements [Member] | First $500 million of USOF's, USNG's, US12OF's, UGA'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%
Base amount for determining fee percentage	$ 500,000,000
Brown Brothers Harriman & Co. Agreements [Member] | USOF's, USNG's, US12OF's, UGA'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	0.0465%
Brown Brothers Harriman & Co. Agreements [Member] | USOF's, USNG's, US12OF's, UGA'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] | Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 500,000,000
Brown Brothers Harriman & Co. Agreements [Member] | USOF's, USNG's, US12OF's, UGA'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
Brown Brothers Harriman & Co. Agreements [Member] | USOF's, USNG's, US12OF's, UGA'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	0.035%
Base amount for determining fee percentage	$ 1,000,000,000
Brokerage and Futures Commission Merchant Agreements [Member] | Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Commissions per round-turn trade, including applicable exchange and NFA fees for Oil Futures Contracts and options on Oil Futures Contracts | $ / Unit	7
Brokerage and Futures Commission Merchant Agreements [Member] | Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Commissions per round-turn trade, including applicable exchange and NFA fees for Oil Futures Contracts and options on Oil Futures Contracts | $ / Unit	8

FINANCIAL INSTRUMENTS, OFF-BA29

FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Additional Information) (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Money Market Funds [Member]
Loss Contingencies [Line Items]
Deposits in domestic and foreign financial institutions, including cash investments in money market funds	$ 748,000,001	$ 625,000,000
US Treasury Securities [Member]
Loss Contingencies [Line Items]
Deposits in domestic and foreign financial institutions, including cash investments in money market funds	$ 2,422,382,750	$ 2,651,911,973

FINANCIAL HIGHLIGHTS (Per share

FINANCIAL HIGHLIGHTS (Per share Performance Data and Other Supplemental Financial Data) (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Per Share Operating Performance:
Net asset value, beginning of year	$ 11.02	$ 20.15	$ 35.23
Total income (loss)	0.77	(9.01)	(14.85)
Total expenses	(0.08)	(0.12)	(0.23)
Net increase (decrease) in net asset value	0.69	(9.13)	(15.08)
Net asset value, end of year	$ 11.71	$ 11.02	$ 20.15
Total Return	6.26%	(45.31%)	(42.80%)
Ratios to Average Net Assets
Total income (loss)	20.57%	(49.08%)	(68.15%)
Expenses excluding management fees	0.32%	0.29%	0.27%
Management fees	0.45%	0.45%	0.45%
Net income (loss)	19.80%	(49.82%)	(68.86%)

QUARTERLY FINANCIAL DATA (Una31

QUARTERLY FINANCIAL DATA (Unaudited) (Summarized (Unaudited) Quarterly Financial Information) (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information [Line Items]
Total Income (Loss)	$ 294,578,790	$ (78,243,696)	$ 647,936,099	$ (171,852,015)	$ (834,143,510)	$ (672,333,075)	$ 509,753,001	$ (272,571,845)	$ 692,419,178	$ (1,269,295,429)	$ (484,175,079)
Total Expenses	6,125,008	6,111,165	6,509,218	7,120,977	5,834,098	4,671,346	4,493,649	4,118,398	25,866,368	19,117,491	5,098,155
Net Income (Loss)	$ 288,453,782	$ (84,354,861)	$ 641,426,881	$ (178,972,992)	$ (839,977,608)	$ (677,004,421)	$ 505,259,352	$ (276,690,243)	$ 666,552,810	$ (1,288,412,920)	$ (489,273,234)
Net Income (Loss) per Share	$ 0.71	$ (0.56)	$ 1.82	$ (1.28)	$ (3.55)	$ (5.36)	$ 3.06	$ (3.28)	$ 0.69	$ (9.13)	$ (15.08)

FAIR VALUE OF FINANCIAL INSTR32

FAIR VALUE OF FINANCIAL INSTRUMENTS (Valuation of Securities Using Fair Value Hierarchy) (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	$ 2,770,212,015	$ 2,468,495,664
Exchange-Traded Futures Contracts [Member] | U S
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	111,290,560	(138,508,060)
Fair Value, Inputs, Level 1 [Member] | Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	2,770,212,015	2,468,495,664
Fair Value, Inputs, Level 1 [Member] | Exchange-Traded Futures Contracts [Member] | U S
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	111,290,560	(138,508,060)
Fair Value, Inputs, Level 2 [Member] | Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
Fair Value, Inputs, Level 2 [Member] | Exchange-Traded Futures Contracts [Member] | U S
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Exchange-Traded Futures Contracts [Member] | U S
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	$ 0	$ 0

FAIR VALUE OF FINANCIAL INSTR33

FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value of Derivative Instruments) (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Commodity Contracts [Member] | Assets [Member] | Future [Member]
Derivatives Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	$ 111,290,560	$ (138,508,060)

FAIR VALUE OF FINANCIAL INSTR34

FAIR VALUE OF FINANCIAL INSTRUMENTS (Effect of Derivative Instruments on Statements of Operations) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income	$ 249,798,620	$ 29,109,870	$ (170,342,900)
Commodity Contracts [Member] | Realized gain (loss) on closed positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	431,308,189	(1,300,519,431)	(314,354,470)
Commodity Contracts [Member] | Change in unrealized gain (loss) on open positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income	$ 249,798,620	$ 29,109,870	$ (170,342,900)