ProShares Ultra Silver (AGQ) 10-K 1 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 24, 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	ProShares Trust II
Entity Central Index Key	1,415,311
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		0
Entity Public Float			$ 0
ProShares VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		9,859,451
Entity Public Float			193,732,260
ProShares VIX Mid-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		1,112,403
Entity Public Float			42,675,530
ProShares Short VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,150,000
Entity Public Float			677,028,000
ProShares Ultra VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		20,277,809
Entity Public Float			867,583,104
ProShares UltraShort Bloomberg Crude Oil [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,839,884
Entity Public Float			164,867,666
ProShares UltraShort Bloomberg Natural Gas [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		224,832
Entity Public Float			2,548,778
ProShares UltraShort Gold [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		446,977
Entity Public Float			55,788,460
ProShares UltraShort Silver [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		616,976
Entity Public Float			30,604,790
ProShares Short Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		350,000
Entity Public Float			17,124,000
ProShares UltraShort Australian Dollar [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		300,000
Entity Public Float			18,714,500
ProShares UltraShort Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		11,900,000
Entity Public Float			386,688,000
ProShares UltraShort Yen [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,499,290
Entity Public Float			193,721,394
ProShares Ultra Bloomberg Crude Oil [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		34,011,317
Entity Public Float			902,787,523
ProShares Ultra Bloomberg Natural Gas [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		4,642,169
Entity Public Float			43,104,283
ProShares Ultra Gold [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,750,000
Entity Public Float			101,317,500
ProShares Ultra Silver [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		8,096,526
Entity Public Float			405,029,394
ProShares Ultra Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		900,000
Entity Public Float			9,516,000
ProShares Ultra Yen [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		99,970
Entity Public Float			$ 7,268,819

Statements of Financial Conditi

Statements of Financial Condition - USD ($)		Dec. 31, 2016	Dec. 31, 2015
Assets
Cash		$ 39,482,473	$ 48,049,225
Segregated cash balances with brokers for futures contracts		180,212,984	261,083,712
Short-term U.S. government and agency obligations		3,038,848,441	3,313,591,600
Unrealized appreciation on swap agreements		55,358,571	6,669,519
Unrealized appreciation on forward agreements		4,417,812	6,587,221
Unrealized appreciation on foreign currency forward contracts		33,392,354	1,805,661
Receivable from capital shares sold			48,046,138
Receivable on open futures contracts		41,862,862	27,655,327
Total assets		3,393,575,497	3,713,488,403
Liabilities
Payable for capital shares redeemed		71,525,035	60,119,975
Payable on open futures contracts		3,972,621	3,078,269
Brokerage commissions and fees payable		2,909	39,148
Payable to Sponsor		2,722,696	2,839,305
Unrealized depreciation on swap agreements		12,206,881	72,446,044
Unrealized depreciation on forward agreements		25,407,296	24,811,696
Unrealized depreciation on foreign currency forward contracts		1,400,572	43,545,218
Total liabilities		117,238,010	206,879,655
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	[1]	3,276,337,487	3,506,608,748	[2]
Total liabilities and shareholders' equity		$ 3,393,575,497	$ 3,713,488,403
Shares outstanding		102,788,942	87,793,127
ProShares VIX Short-Term Futures ETF [Member]
Assets
Cash		$ 4,536,425	$ 2,124,103
Segregated cash balances with brokers for futures contracts		17,235,855	5,888,545
Short-term U.S. government and agency obligations		147,991,233	96,073,659
Receivable on open futures contracts		4,484,270	1,263,933
Total assets		174,247,783	105,350,240
Liabilities
Payable to Sponsor		87,637	77,417
Total liabilities		87,637	77,417
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		174,160,146	105,272,823
Total liabilities and shareholders' equity		$ 174,247,783	$ 105,350,240
Shares outstanding		8,209,451	1,589,962
Net asset value per share		$ 21.21	$ 66.21
Market value per share		$ 21.26	$ 66.65
ProShares VIX Mid-Term Futures ETF [Member]
Assets
Cash		$ 1,155,115	$ 671,791
Segregated cash balances with brokers for futures contracts		1,052,615	980,750
Short-term U.S. government and agency obligations		45,486,235	25,976,287
Receivable on open futures contracts		242,541	42,188
Total assets		47,936,506	27,671,016
Liabilities
Payable for capital shares redeemed		2,085,020
Payable to Sponsor		32,572	20,378
Total liabilities		2,117,592	20,378
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		45,818,914	27,650,638
Total liabilities and shareholders' equity		$ 47,936,506	$ 27,671,016
Shares outstanding		1,087,403	512,404
Net asset value per share		$ 42.14	$ 53.96
Market value per share		$ 42.34	$ 53.99
ProShares Short VIX Short-Term Futures ETF [Member]
Assets
Cash		$ 1,850,760	$ 5,150,976
Segregated cash balances with brokers for futures contracts		55,323,984	123,528,405
Short-term U.S. government and agency obligations		170,396,436	535,392,718
Receivable from capital shares sold			10,164,157
Receivable on open futures contracts		1,059,418
Total assets		228,630,598	674,236,256
Liabilities
Payable for capital shares redeemed			29,497,107
Payable on open futures contracts		325,000	1,420,271
Payable to Sponsor		230,211	507,517
Total liabilities		555,211	31,424,895
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		228,075,387	642,811,361
Total liabilities and shareholders' equity		$ 228,630,598	$ 674,236,256
Shares outstanding		2,500,000	12,650,040
Net asset value per share		$ 91.23	$ 50.81
Market value per share		$ 90.98	$ 50.45
ProShares Ultra VIX Short-Term Futures ETF [Member]
Assets
Cash		$ 10,969,955	$ 9,081,964
Segregated cash balances with brokers for futures contracts		71,363,625	62,348,600
Short-term U.S. government and agency obligations		434,671,795	438,357,849
Receivable from capital shares sold			32,987,472
Receivable on open futures contracts		35,967,191	17,995,478
Total assets		552,972,566	560,771,363
Liabilities
Payable for capital shares redeemed		36,789,539	12,635,235
Payable to Sponsor		424,273	427,388
Total liabilities		37,213,812	13,062,623
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		515,758,754	547,708,740
Total liabilities and shareholders' equity		$ 552,972,566	$ 560,771,363
Shares outstanding		11,861,530	780,098
Net asset value per share		$ 43.48	$ 702.10
Market value per share		$ 43.75	$ 708.75
ProShares UltraShort Bloomberg Crude Oil [Member]
Assets
Cash		$ 2,715,772	$ 598,645
Segregated cash balances with brokers for futures contracts		4,931,520	10,154,430
Short-term U.S. government and agency obligations		205,694,385	79,692,642
Unrealized appreciation on swap agreements			6,412,656
Total assets		213,341,677	96,858,373
Liabilities
Payable on open futures contracts		13,602	850,883
Brokerage commissions and fees payable			8,453
Payable to Sponsor		162,891	101,143
Unrealized depreciation on swap agreements		12,206,881
Total liabilities		12,383,374	960,479
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		200,958,303	95,897,894
Total liabilities and shareholders' equity		$ 213,341,677	$ 96,858,373
Shares outstanding		6,339,884	1,439,888
Net asset value per share		$ 31.70	$ 66.60
Market value per share		$ 31.65	$ 66.82
ProShares UltraShort Bloomberg Natural Gas [Member]
Assets
Cash		$ 326,631	$ 1,099,140
Segregated cash balances with brokers for futures contracts		710,655	2,046,660
Short-term U.S. government and agency obligations		2,899,151	8,115,004
Receivable on open futures contracts		105,872
Total assets		4,042,309	11,260,804
Liabilities
Payable on open futures contracts			785,170
Brokerage commissions and fees payable		144	1,908
Payable to Sponsor		3,371	10,870
Total liabilities		3,515	797,948
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		4,038,794	10,462,856
Total liabilities and shareholders' equity		$ 4,042,309	$ 11,260,804
Shares outstanding		174,832	224,856
Net asset value per share		$ 23.10	$ 46.53
Market value per share		$ 23.05	$ 46.55
ProShares UltraShort Gold [Member]
Assets
Cash		$ 120,840	$ 151,638
Segregated cash balances with brokers for futures contracts		13,200	91,250
Short-term U.S. government and agency obligations		60,540,555	72,979,905
Unrealized appreciation on forward agreements		3,033,566	1,808,942
Receivable on open futures contracts		1,280
Total assets		63,709,441	75,031,735
Liabilities
Payable on open futures contracts			80
Payable to Sponsor		55,794	59,891
Total liabilities		55,794	59,971
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		63,653,647	74,971,764
Total liabilities and shareholders' equity		$ 63,709,441	$ 75,031,735
Shares outstanding		696,978	646,978
Net asset value per share		$ 91.33	$ 115.88
Market value per share		$ 90.54	$ 115.83
ProShares UltraShort Silver [Member]
Assets
Cash		$ 86,051	$ 514,784
Segregated cash balances with brokers for futures contracts		14,300	11,440
Short-term U.S. government and agency obligations		21,550,319	50,730,230
Unrealized appreciation on forward agreements		1,384,246	4,778,279
Receivable on open futures contracts		2,290	390
Total assets		23,037,206	56,035,123
Liabilities
Payable to Sponsor		19,550	47,185
Total liabilities		19,550	47,185
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		23,017,656	55,987,938
Total liabilities and shareholders' equity		$ 23,037,206	$ 56,035,123
Shares outstanding		616,976	866,978
Net asset value per share		$ 37.31	$ 64.58
Market value per share		$ 38.76	$ 64.55
ProShares Short Euro [Member]
Assets
Cash		$ 2,292,012	$ 1,783,802
Segregated cash balances with brokers for futures contracts		402,600	503,745
Short-term U.S. government and agency obligations		13,164,828	15,153,211
Receivable on open futures contracts			84,235
Total assets		15,859,440	17,524,993
Liabilities
Payable on open futures contracts		76,666
Payable to Sponsor		12,686	14,095
Total liabilities		89,352	14,095
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		15,770,088	17,510,898
Total liabilities and shareholders' equity		$ 15,859,440	$ 17,524,993
Shares outstanding		350,000	400,005
Net asset value per share		$ 45.06	$ 43.78
Market value per share		$ 45.12	$ 43.74
ProShares UltraShort Australian Dollar [Member]
Assets
Cash		$ 2,834,389	$ 1,958,996
Segregated cash balances with brokers for futures contracts		914,760	57,065
Short-term U.S. government and agency obligations		12,909,619	18,408,894
Receivable on open futures contracts			52,491
Total assets		16,658,768	20,477,446
Liabilities
Payable on open futures contracts		32,340
Payable to Sponsor		12,955	16,767
Total liabilities		45,295	16,767
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		16,613,473	20,460,679
Total liabilities and shareholders' equity		$ 16,658,768	$ 20,477,446
Shares outstanding		300,000	350,005
Net asset value per share		$ 55.38	$ 58.46
Market value per share		$ 55.24	$ 58.15
ProShares UltraShort Euro [Member]
Assets
Cash		$ 2,916,502	$ 10,372,583
Short-term U.S. government and agency obligations		337,375,787	546,166,776
Unrealized appreciation on foreign currency forward contracts		16,519,070
Total assets		356,811,359	556,539,359
Liabilities
Payable for capital shares redeemed		6,771,472	5,108,230
Payable to Sponsor		291,098	414,275
Unrealized depreciation on foreign currency forward contracts		356,139	28,710,336
Total liabilities		7,418,709	34,232,841
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		349,392,650	522,306,518
Total liabilities and shareholders' equity		$ 356,811,359	$ 556,539,359
Shares outstanding		12,900,000	20,450,014
Net asset value per share		$ 27.08	$ 25.54
Market value per share		$ 27.08	$ 25.53
ProShares UltraShort Yen [Member]
Assets
Cash		$ 3,166,988	$ 276,968
Short-term U.S. government and agency obligations		257,102,313	259,997,001
Unrealized appreciation on foreign currency forward contracts		16,870,357	933,727
Total assets		277,139,658	261,207,696
Liabilities
Payable for capital shares redeemed			8,794,729
Payable to Sponsor		232,491	210,888
Unrealized depreciation on foreign currency forward contracts		125,420	14,829,179
Total liabilities		357,911	23,834,796
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		276,781,747	237,372,900
Total liabilities and shareholders' equity		$ 277,139,658	$ 261,207,696
Shares outstanding		3,449,290	2,699,294
Net asset value per share		$ 80.24	$ 87.94
Market value per share		$ 80.25	$ 87.89
ProShares Ultra Bloomberg Crude Oil [Member]
Assets
Cash		$ 1,401,555	$ 4,008,379
Segregated cash balances with brokers for futures contracts		20,609,600	47,571,810
Short-term U.S. government and agency obligations		885,050,007	797,650,543
Unrealized appreciation on swap agreements		55,358,571
Receivable from capital shares sold			4,894,509
Receivable on open futures contracts			5,150,763
Total assets		962,419,733	859,276,004
Liabilities
Payable for capital shares redeemed		25,879,004	2,514,956
Payable on open futures contracts		1,993,438
Brokerage commissions and fees payable		2,332	25,000
Payable to Sponsor		813,099	636,984
Unrealized depreciation on swap agreements			72,176,589
Total liabilities		28,687,873	75,353,529
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		933,731,860	783,922,475
Total liabilities and shareholders' equity		$ 962,419,733	$ 859,276,004
Shares outstanding		40,013,933	31,163,934
Net asset value per share		$ 23.34	$ 25.15
Market value per share		$ 23.36	$ 25.08
ProShares Ultra Bloomberg Natural Gas [Member]
Assets
Cash		$ 971,442	$ 1,411,137
Segregated cash balances with brokers for futures contracts		7,612,770	7,595,280
Short-term U.S. government and agency obligations		36,183,648	26,807,731
Receivable on open futures contracts			3,065,769
Total assets		44,767,860	38,879,917
Liabilities
Payable on open futures contracts		1,528,005
Brokerage commissions and fees payable		433	3,623
Payable to Sponsor		36,036	25,110
Total liabilities		1,564,474	28,733
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		43,203,386	38,851,184
Total liabilities and shareholders' equity		$ 44,767,860	$ 38,879,917
Shares outstanding		2,292,169	2,092,170
Net asset value per share		$ 18.85	$ 18.57
Market value per share		$ 18.96	$ 18.48
ProShares Ultra Gold [Member]
Assets
Cash		$ 1,262,351	$ 251,524
Segregated cash balances with brokers for futures contracts		13,200	8,250
Short-term U.S. government and agency obligations		95,356,621	71,912,587
Receivable on open futures contracts			80
Total assets		96,632,172	72,172,441
Liabilities
Payable on open futures contracts		1,280
Payable to Sponsor		72,585	57,031
Unrealized depreciation on forward agreements		4,431,107	2,250,595
Total liabilities		4,504,972	2,307,626
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		92,127,200	69,864,815
Total liabilities and shareholders' equity		$ 96,632,172	$ 72,172,441
Shares outstanding		2,800,000	2,350,014
Net asset value per share		$ 32.90	$ 29.73
Market value per share		$ 33.20	$ 29.73
ProShares Ultra Silver [Member]
Assets
Cash		$ 1,664,601	$ 243,900
Segregated cash balances with brokers for futures contracts		14,300	17,160
Short-term U.S. government and agency obligations		295,300,799	238,899,626
Total assets		296,979,700	239,160,686
Liabilities
Payable on open futures contracts		2,290	1,875
Payable to Sponsor		221,281	181,068
Unrealized depreciation on forward agreements		20,976,189	22,561,101
Total liabilities		21,199,760	22,744,044
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		275,779,940	216,416,642
Total liabilities and shareholders' equity		$ 296,979,700	$ 239,160,686
Shares outstanding		8,246,526	7,996,533
Net asset value per share		$ 33.44	$ 27.06
Market value per share		$ 32.09	$ 27.08
ProShares Ultra Euro [Member]
Assets
Cash		$ 606,393	$ 227,310
Short-term U.S. government and agency obligations		11,891,831	11,605,262
Unrealized appreciation on foreign currency forward contracts		2,548	604,920
Total assets		12,500,772	12,437,492
Liabilities
Payable for capital shares redeemed			1,569,718
Payable to Sponsor		9,629	10,044
Unrealized depreciation on foreign currency forward contracts		576,558
Total liabilities		586,187	1,579,762
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		11,914,585	10,857,730
Total liabilities and shareholders' equity		$ 12,500,772	$ 12,437,492
Shares outstanding		850,000	700,014
Net asset value per share		$ 14.02	$ 15.51
Market value per share		$ 14.09	$ 15.51
ProShares Ultra Yen [Member]
Assets
Cash		$ 604,691	$ 147,371
Short-term U.S. government and agency obligations		5,282,879	5,069,491
Unrealized appreciation on foreign currency forward contracts		379	267,014
Total assets		5,887,949	5,483,876
Liabilities
Payable to Sponsor		4,537	4,325
Unrealized depreciation on foreign currency forward contracts		342,455	5,703
Total liabilities		346,992	10,028
Commitments and Contingencies
Shareholders' equity
Shareholders' equity		5,540,957	5,473,848
Total liabilities and shareholders' equity		$ 5,887,949	$ 5,483,876
Shares outstanding		99,970	99,974
Net asset value per share		$ 55.43	$ 54.75
Market value per share		$ 55.52	$ 54.70
[1]	The operations include the activity of: ProShares Managed Futures Strategy through March 30, 2016, and ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity through September 1, 2016, the date of liquidation, respectively. See Note 1.
[2]	The operations include the activity of ProShares Ultra Australian Dollar through June 29, 2015, the date of liquidation, respectively. See Note 1.

Statements of Financial Condit3

Statements of Financial Condition (Parenthetical) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Short-term U.S. government and agency obligations, cost	$ 3,038,837,465	$ 3,313,585,456
ProShares VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	147,990,045	96,075,481
ProShares VIX Mid-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	45,486,489	25,975,462
ProShares Short VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	170,391,741	535,381,199
ProShares Ultra VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	434,676,067	438,333,277
ProShares UltraShort Bloomberg Crude Oil [Member]
Short-term U.S. government and agency obligations, cost	205,694,828	79,694,797
ProShares UltraShort Bloomberg Natural Gas [Member]
Short-term U.S. government and agency obligations, cost	2,899,188	8,114,653
ProShares UltraShort Gold [Member]
Short-term U.S. government and agency obligations, cost	60,540,275	72,981,653
ProShares UltraShort Silver [Member]
Short-term U.S. government and agency obligations, cost	21,549,766	50,730,044
ProShares Short Euro [Member]
Short-term U.S. government and agency obligations, cost	13,164,807	15,153,202
ProShares UltraShort Australian Dollar [Member]
Short-term U.S. government and agency obligations, cost	12,909,895	18,409,449
ProShares UltraShort Euro [Member]
Short-term U.S. government and agency obligations, cost	337,373,566	546,177,230
ProShares UltraShort Yen [Member]
Short-term U.S. government and agency obligations, cost	257,103,135	260,014,650
ProShares Ultra Bloomberg Crude Oil [Member]
Short-term U.S. government and agency obligations, cost	885,046,303	797,652,302
ProShares Ultra Bloomberg Natural Gas [Member]
Short-term U.S. government and agency obligations, cost	36,183,384	26,806,648
ProShares Ultra Gold [Member]
Short-term U.S. government and agency obligations, cost	95,356,703	71,908,280
ProShares Ultra Silver [Member]
Short-term U.S. government and agency obligations, cost	295,296,440	238,900,176
ProShares Ultra Euro [Member]
Short-term U.S. government and agency obligations, cost	11,891,729	11,605,665
ProShares Ultra Yen [Member]
Short-term U.S. government and agency obligations, cost	$ 5,283,104	$ 5,069,206

Statements of Operations

Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Investment Income
Interest	$ 9,133,928	[1]	$ 1,546,729	[2]	$ 1,151,784
Expenses
Management fee	34,712,239	[1]	35,055,606	[2]	27,669,705
Brokerage commissions and fees	7,438,871	[1]	6,480,284	[2]	4,580,430
Offering costs			59,479	[2]	16,401
Limitation by Sponsor			(11,814)	[2]	(9,474)
Total expenses	42,151,110	[1]	41,583,555	[2]	32,257,062
Net investment income (loss)	(33,017,182)	[1]	(40,036,826)	[2]	(31,105,278)
Net realized gain (loss) on
Foreign currency forward contracts	(47,075,744)	[1]	138,005,915	[2]	210,564,249
Short-term U.S. government and agency obligations	(15,768)	[1]	47,732	[2]	123,212
Net realized gain (loss)	(1,320,602,359)	[1]	(1,164,531,561)	[2]	(160,550,428)
Change in net unrealized appreciation/depreciation on
Futures contracts	(22,030,613)	[1]	40,193,356	[2]	9,175,329
Foreign currency forward contracts	73,731,339	[1]	(56,805,160)	[2]	(514,227)
Short-term U.S. government and agency obligations	4,832	[1]	(46,135)	[2]	(73,469)
Change in net unrealized appreciation/depreciation	157,868,764	[1]	(39,700,049)	[2]	(46,083,005)
Net realized and unrealized gain (loss)	(1,162,733,595)	[1]	(1,204,231,610)	[2]	(206,633,433)
Net income (loss)	(1,195,750,777)	[1]	(1,244,268,436)	[2]	(237,738,711)
Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(1,286,470,453)	[1]	(675,706,798)	[2]	(136,360,050)
Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(25,398,375)	[1]	(553,434,721)	[2]	(79,470,613)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives	108,928,215	[1]	(16,849,426)	[2]	(48,539,505)
Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	38,357,981	[1]	(73,443,689)	[2]	(155,407,226)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives	(2,765,009)	[1]	(6,192,684)	[2]	(6,131,133)
ProShares VIX Short-Term Futures ETF [Member]
Investment Income
Interest	466,392		42,319		47,562
Expenses
Management fee	1,632,880		1,062,171		1,083,189
Brokerage commissions and fees	270,159		130,942		82,921
Total expenses	1,903,039		1,193,113		1,166,110
Net investment income (loss)	(1,436,647)		(1,150,794)		(1,118,548)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	6,650		1,703		12,242
Net realized gain (loss)	(195,469,141)		(19,406,840)		(682,105)
Change in net unrealized appreciation/depreciation on
Futures contracts	609,973		(7,343,245)		22,917,306
Short-term U.S. government and agency obligations	3,010		(3,657)		(6,229)
Change in net unrealized appreciation/depreciation	612,983		(7,346,902)		22,911,077
Net realized and unrealized gain (loss)	(194,856,158)		(26,753,742)		22,228,972
Net income (loss)	(196,292,805)		(27,904,536)		21,110,424
ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(195,475,791)		(19,408,543)		(694,347)
ProShares VIX Mid-Term Futures ETF [Member]
Investment Income
Interest	107,409		8,293		16,573
Expenses
Management fee	369,016		233,390		392,120
Brokerage commissions and fees	32,884		15,503		10,931
Total expenses	401,900		248,893		403,051
Net investment income (loss)	(294,491)		(240,600)		(386,478)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	499		1,355		1,742
Net realized gain (loss)	(11,085,007)		(3,334,581)		(14,377,068)
Change in net unrealized appreciation/depreciation on
Futures contracts	(943,885)		(605,025)		5,157,354
Short-term U.S. government and agency obligations	(1,079)		(327)		187
Change in net unrealized appreciation/depreciation	(944,964)		(605,352)		5,157,541
Net realized and unrealized gain (loss)	(12,029,971)		(3,939,933)		(9,219,527)
Net income (loss)	(12,324,462)		(4,180,533)		(9,606,005)
ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(11,085,506)		(3,335,936)		(14,378,810)
ProShares Short VIX Short-Term Futures ETF [Member]
Investment Income
Interest	1,126,057		180,686		81,544
Expenses
Management fee	4,448,808		4,043,491		2,785,597
Brokerage commissions and fees	2,074,099		1,935,395		1,581,416
Total expenses	6,522,907		5,978,886		4,367,013
Net investment income (loss)	(5,396,850)		(5,798,200)		(4,285,469)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	(11,670)		35,629		19,363
Net realized gain (loss)	440,379,719		69,828,657		76,945,361
Change in net unrealized appreciation/depreciation on
Futures contracts	(21,056,026)		27,098,564		(24,469,104)
Short-term U.S. government and agency obligations	(6,824)		8,936		(1,764)
Change in net unrealized appreciation/depreciation	(21,062,850)		27,107,500		(24,470,868)
Net realized and unrealized gain (loss)	419,316,869		96,936,157		52,474,493
Net income (loss)	413,920,019		91,137,957		48,189,024
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	440,391,389		69,793,028		76,925,998
ProShares Ultra VIX Short-Term Futures ETF [Member]
Investment Income
Interest	1,639,964		156,187		72,700
Expenses
Management fee	6,417,822		4,362,460		2,868,337
Brokerage commissions and fees	4,158,919		3,203,875		2,563,849
Total expenses	10,576,741		7,566,335		5,432,186
Net investment income (loss)	(8,936,777)		(7,410,148)		(5,359,486)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	15,949		(49,718)		9,921
Net realized gain (loss)	(1,567,324,739)		(392,223,946)		(139,402,604)
Change in net unrealized appreciation/depreciation on
Futures contracts	(19,866,703)		(27,690,787)		63,595,164
Short-term U.S. government and agency obligations	(28,844)		26,647		(4,701)
Change in net unrealized appreciation/depreciation	(19,895,547)		(27,664,140)		63,590,463
Net realized and unrealized gain (loss)	(1,587,220,286)		(419,888,086)		(75,812,141)
Net income (loss)	(1,596,157,063)		(427,298,234)		(81,171,627)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(1,567,340,688)		(392,174,228)		(139,412,525)
ProShares UltraShort Bloomberg Crude Oil [Member]
Investment Income
Interest	500,160		60,884		110,620
Expenses
Management fee	1,755,696		1,978,613		2,448,428
Brokerage commissions and fees	153,428		248,482		78,033
Total expenses	1,909,124		2,227,095		2,526,461
Net investment income (loss)	(1,408,964)		(2,166,211)		(2,415,841)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	(4,064)		14,458		20,701
Net realized gain (loss)	(67,756,228)		91,684,782		99,347,798
Change in net unrealized appreciation/depreciation on
Futures contracts	(3,891,328)		(13,342,090)		17,039,376
Short-term U.S. government and agency obligations	1,712		(4,396)		(8,704)
Change in net unrealized appreciation/depreciation	(22,509,153)		(33,951,907)		46,381,649
Net realized and unrealized gain (loss)	(90,265,381)		57,732,875		145,729,447
Net income (loss)	(91,674,345)		55,566,664		143,313,606
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(12,045,454)		46,904,474		44,472,509
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(55,706,710)		44,765,850		54,854,588
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives	(18,619,537)		(20,605,421)		29,350,977
ProShares UltraShort Bloomberg Natural Gas [Member]
Investment Income
Interest	19,053		5,830		16,306
Expenses
Management fee	81,259		112,277		385,014
Brokerage commissions and fees	59,966		70,677		92,199
Total expenses	141,225		182,954		477,213
Net investment income (loss)	(122,172)		(177,124)		(460,907)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	3,139		29		5,163
Net realized gain (loss)	589,999		15,212,833		8,796,882
Change in net unrealized appreciation/depreciation on
Futures contracts	1,989,133		(6,412,629)		2,899,165
Short-term U.S. government and agency obligations	(388)		168		72
Change in net unrealized appreciation/depreciation	1,988,745		(6,412,461)		2,899,237
Net realized and unrealized gain (loss)	2,578,744		8,800,372		11,696,119
Net income (loss)	2,456,572		8,623,248		11,235,212
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	586,860		15,212,804		8,791,719
ProShares UltraShort Gold [Member]
Investment Income
Interest	164,570		31,999		40,675
Expenses
Management fee	625,950		735,540		898,453
Brokerage commissions and fees	43		41		39
Total expenses	625,993		735,581		898,492
Net investment income (loss)	(461,423)		(703,582)		(857,817)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	(378)		1,301		3,873
Net realized gain (loss)	(12,241,129)		12,708,936		(5,312,609)
Change in net unrealized appreciation/depreciation on
Futures contracts	13,760		9,740		(19,040)
Short-term U.S. government and agency obligations	2,028		(2,950)		868
Change in net unrealized appreciation/depreciation	1,240,412		4,098,510		(7,934,003)
Net realized and unrealized gain (loss)	(11,000,717)		16,807,446		(13,246,612)
Net income (loss)	(11,462,140)		16,103,864		(14,104,429)
ProShares UltraShort Gold [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(29,440)		15,950		23,310
ProShares UltraShort Gold [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(12,211,311)		12,691,685		(5,339,792)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives	1,224,624		4,091,720		(7,915,831)
ProShares UltraShort Silver [Member]
Investment Income
Interest	93,483		23,831		30,901
Expenses
Management fee	349,293		540,253		616,703
Brokerage commissions and fees	43		42		39
Total expenses	349,336		540,295		616,742
Net investment income (loss)	(255,853)		(516,464)		(585,841)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	(1,916)		(2,787)		4,234
Net realized gain (loss)	(17,556,630)		10,756,758		15,119,117
Change in net unrealized appreciation/depreciation on
Futures contracts	21,340		4,410		(12,640)
Short-term U.S. government and agency obligations	367		(794)		(2,414)
Change in net unrealized appreciation/depreciation	(3,372,326)		4,186,942		2,807,756
Net realized and unrealized gain (loss)	(20,928,956)		14,943,700		17,926,873
Net income (loss)	(21,184,809)		14,427,236		17,341,032
ProShares UltraShort Silver [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(40,250)		15,575		32,275
ProShares UltraShort Silver [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(17,514,464)		10,743,970		15,082,608
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives	(3,394,033)		4,183,326		2,822,810
ProShares Short Euro [Member]
Investment Income
Interest	32,959		4,504		4,716
Expenses
Management fee	153,021		179,286		121,126
Brokerage commissions and fees	2,666		3,979		1,837
Total expenses	155,687		183,265		122,963
Net investment income (loss)	(122,728)		(178,761)		(118,247)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	33		218		402
Net realized gain (loss)	663,807		1,559,643		1,593,450
Change in net unrealized appreciation/depreciation on
Futures contracts	(110,538)		(141,893)		418,562
Short-term U.S. government and agency obligations	12		(170)		(472)
Change in net unrealized appreciation/depreciation	(110,526)		(142,063)		418,090
Net realized and unrealized gain (loss)	553,281		1,417,580		2,011,540
Net income (loss)	430,553		1,238,819		1,893,293
ProShares Short Euro [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	663,774		1,559,425		1,593,048
ProShares UltraShort Australian Dollar [Member]
Investment Income
Interest	43,459		5,998		8,225
Expenses
Management fee	175,191		199,845		208,597
Brokerage commissions and fees	13,920		16,140		12,811
Total expenses	189,111		215,985		221,408
Net investment income (loss)	(145,652)		(209,987)		(213,183)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	495		225		492
Net realized gain (loss)	(2,786,709)		4,330,688		2,296,708
Change in net unrealized appreciation/depreciation on
Futures contracts	1,602,610		(1,163,751)		(174,124)
Short-term U.S. government and agency obligations	279		(553)		(1,463)
Change in net unrealized appreciation/depreciation	1,602,889		(1,164,304)		(175,587)
Net realized and unrealized gain (loss)	(1,183,820)		3,166,384		2,121,121
Net income (loss)	(1,329,472)		2,956,397		1,907,938
ProShares UltraShort Australian Dollar [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	(2,787,204)		4,330,463		2,296,216
ProShares UltraShort Euro [Member]
Investment Income
Interest	1,012,886		264,845		199,596
Expenses
Management fee	3,777,543		5,265,432		4,193,741
Total expenses	3,777,543		5,265,432		4,193,741
Net investment income (loss)	(2,764,657)		(5,000,587)		(3,994,145)
Net realized gain (loss) on
Foreign currency forward contracts	(25,711,518)		131,651,572		83,678,955
Short-term U.S. government and agency obligations	242		22,509		4,637
Net realized gain (loss)	(25,711,276)		131,674,081		83,683,592
Change in net unrealized appreciation/depreciation on
Foreign currency forward contracts	44,873,267		(45,473,330)		30,511,501
Short-term U.S. government and agency obligations	12,675		(23,782)		(12,286)
Change in net unrealized appreciation/depreciation	44,885,942		(45,497,112)		30,499,215
Net realized and unrealized gain (loss)	19,174,666		86,176,969		114,182,807
Net income (loss)	16,410,009		81,176,382		110,188,662
ProShares UltraShort Yen [Member]
Investment Income
Interest	531,771		135,814		197,253
Expenses
Management fee	2,141,333		3,759,492		3,938,854
Total expenses	2,141,333		3,759,492		3,938,854
Net investment income (loss)	(1,609,562)		(3,623,678)		(3,741,601)
Net realized gain (loss) on
Foreign currency forward contracts	(22,220,271)		8,809,464		127,846,225
Short-term U.S. government and agency obligations	(5,910)		(3,035)		13,833
Net realized gain (loss)	(22,226,181)		8,806,429		127,860,058
Change in net unrealized appreciation/depreciation on
Foreign currency forward contracts	30,640,389		(12,316,677)		(30,965,459)
Short-term U.S. government and agency obligations	16,827		(30,886)		(20,893)
Change in net unrealized appreciation/depreciation	30,657,216		(12,347,563)		(30,986,352)
Net realized and unrealized gain (loss)	8,431,035		(3,541,134)		96,873,706
Net income (loss)	6,821,473		(7,164,812)		93,132,105
ProShares Ultra Bloomberg Crude Oil [Member]
Investment Income
Interest	2,170,633		396,158		68,292
Expenses
Management fee	8,263,078		8,230,180		1,769,248
Brokerage commissions and fees	538,935		639,133		65,408
Total expenses	8,802,013		8,869,313		1,834,656
Net investment income (loss)	(6,631,380)		(8,473,155)		(1,766,364)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	(17,374)		22,728		11,806
Net realized gain (loss)	74,043,666		(896,154,368)		(243,314,151)
Change in net unrealized appreciation/depreciation on
Futures contracts	23,466,479		28,545,473		(47,101,448)
Short-term U.S. government and agency obligations	5,463		(6,857)		(7,333)
Change in net unrealized appreciation/depreciation	151,007,102		32,543,124		(125,247,771)
Net realized and unrealized gain (loss)	225,050,768		(863,611,244)		(368,561,922)
Net income (loss)	218,419,388		(872,084,399)		(370,328,286)
ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	43,093,616		(297,227,106)		(109,160,069)
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	30,967,424		(598,949,990)		(134,165,888)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives	127,535,160		4,004,508		(78,138,990)
ProShares Ultra Bloomberg Natural Gas [Member]
Investment Income
Interest	72,943		20,167		15,961
Expenses
Management fee	325,435		574,158		455,794
Brokerage commissions and fees	131,994		207,344		88,748
Total expenses	457,429		781,502		544,542
Net investment income (loss)	(384,486)		(761,335)		(528,581)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	(698)		4,341		5,068
Net realized gain (loss)	17,571,111		(100,772,476)		(6,459,728)
Change in net unrealized appreciation/depreciation on
Futures contracts	(3,776,159)		41,202,162		(31,232,744)
Short-term U.S. government and agency obligations	(819)		(296)		(1,537)
Change in net unrealized appreciation/depreciation	(3,776,978)		41,201,866		(31,234,281)
Net realized and unrealized gain (loss)	13,794,133		(59,570,610)		(37,694,009)
Net income (loss)	13,409,647		(60,331,945)		(38,222,590)
ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	17,571,809		(100,776,817)		(6,464,796)
ProShares Ultra Gold [Member]
Investment Income
Interest	249,319		42,700		54,755
Expenses
Management fee	900,227		839,083		1,212,064
Brokerage commissions and fees	43		41		39
Total expenses	900,270		839,124		1,212,103
Net investment income (loss)	(650,951)		(796,424)		(1,157,348)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	(806)		(393)		1,361
Net realized gain (loss)	5,815,759		(18,606,208)		(9,672,972)
Change in net unrealized appreciation/depreciation on
Futures contracts	(13,760)		(9,780)		19,140
Short-term U.S. government and agency obligations	(4,389)		2,086		5,375
Change in net unrealized appreciation/depreciation	(2,198,661)		(4,309,443)		8,888,643
Net realized and unrealized gain (loss)	3,617,098		(22,915,651)		(784,329)
Net income (loss)	2,966,147		(23,712,075)		(1,941,677)
ProShares Ultra Gold [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	29,500		(16,180)		(23,260)
ProShares Ultra Gold [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	5,787,065		(18,589,635)		(9,651,073)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives	(2,180,512)		(4,301,749)		8,864,128
ProShares Ultra Silver [Member]
Investment Income
Interest	842,215		156,353		179,642
Expenses
Management fee	3,021,562		2,664,160		4,148,207
Brokerage commissions and fees	45		52		43
Total expenses	3,021,607		2,664,212		4,148,250
Net investment income (loss)	(2,179,392)		(2,507,859)		(3,968,608)
Net realized gain (loss) on
Short-term U.S. government and agency obligations	145		(441)		8,226
Net realized gain (loss)	62,342,586		(78,309,750)		(155,543,194)
Change in net unrealized appreciation/depreciation on
Futures contracts	(18,330)		(7,470)		12,640
Short-term U.S. government and agency obligations	4,909		(9,125)		(11,363)
Change in net unrealized appreciation/depreciation	1,571,491		(10,182,576)		(9,900,963)
Net realized and unrealized gain (loss)	63,914,077		(88,492,326)		(165,444,157)
Net income (loss)	61,734,685		(91,000,185)		(169,412,765)
ProShares Ultra Silver [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	45,750		(19,600)		(52,451)
ProShares Ultra Silver [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	62,296,691		(78,289,709)		(155,498,969)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives	1,584,912		(10,165,981)		(9,902,240)
ProShares Ultra Euro [Member]
Investment Income
Interest	25,015		2,797		1,083
Expenses
Management fee	99,537		106,868		23,330
Total expenses	99,537		106,868		23,330
Net investment income (loss)	(74,522)		(104,071)		(22,247)
Net realized gain (loss) on
Foreign currency forward contracts	138,959		(1,982,208)		(420,533)
Short-term U.S. government and agency obligations	154		(109)		5
Net realized gain (loss)	139,113		(1,982,317)		(420,528)
Change in net unrealized appreciation/depreciation on
Foreign currency forward contracts	(1,178,930)		708,291		(204,333)
Short-term U.S. government and agency obligations	505		(369)		(182)
Change in net unrealized appreciation/depreciation	(1,178,425)		707,922		(204,515)
Net realized and unrealized gain (loss)	(1,039,312)		(1,274,395)		(625,043)
Net income (loss)	(1,113,834)		(1,378,466)		(647,290)
ProShares Ultra Yen [Member]
Investment Income
Interest	16,858		3,609		1,101
Expenses
Management fee	62,705		48,032		21,963
Total expenses	62,705		48,032		21,963
Net investment income (loss)	(45,847)		(44,423)		(20,862)
Net realized gain (loss) on
Foreign currency forward contracts	717,086		(472,913)		(540,398)
Short-term U.S. government and agency obligations	(34)		6		94
Net realized gain (loss)	717,052		(472,907)		(540,304)
Change in net unrealized appreciation/depreciation on
Foreign currency forward contracts	(603,387)		276,556		144,064
Short-term U.S. government and agency obligations	(510)		260		(289)
Change in net unrealized appreciation/depreciation	(603,897)		276,816		143,775
Net realized and unrealized gain (loss)	113,155		(196,091)		(396,529)
Net income (loss)	$ 67,308		$ (240,514)		$ (417,391)
[1]	The operations include the activity of: ProShares Managed Futures Strategy through March 30, 2016, and ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity through September 1, 2016, the date of liquidation, respectively. See Note 1.
[2]	The operations include the activity of ProShares Ultra Australian Dollar through June 29, 2015, the date of liquidation, respectively. See Note 1.

Statements of Changes in Shareh

Statements of Changes in Shareholders' Equity - USD ($)	Total		ProShares VIX Short-Term Futures ETF [Member]	ProShares VIX Mid-Term Futures ETF [Member]	ProShares Short VIX Short-Term Futures ETF [Member]	ProShares Ultra VIX Short-Term Futures ETF [Member]	ProShares UltraShort Bloomberg Crude Oil [Member]	ProShares UltraShort Bloomberg Natural Gas [Member]	ProShares UltraShort Gold [Member]	ProShares UltraShort Silver [Member]	ProShares Short Euro [Member]	ProShares UltraShort Australian Dollar [Member]	ProShares UltraShort Euro [Member]	ProShares UltraShort Yen [Member]	ProShares Ultra Bloomberg Crude Oil [Member]	ProShares Ultra Bloomberg Natural Gas [Member]	ProShares Ultra Gold [Member]	ProShares Ultra Silver [Member]	ProShares Ultra Euro [Member]	ProShares Ultra Yen [Member]
Shareholders' equity, beginning of period at Dec. 31, 2013	$ 3,082,207,084		$ 270,398,554	$ 51,134,323	$ 141,751,202	$ 226,233,584	$ 256,060,149	$ 22,734,767	$ 139,436,456	$ 112,989,686	$ 8,896,842	$ 27,983,279	$ 418,001,115	$ 588,121,516	$ 142,773,429	$ 62,915,779	$ 132,017,405	$ 465,479,519	$ 2,603,827	$ 2,795,026
Addition of shares	5,351,585,350		228,373,046	41,886,902	1,056,547,830	1,646,851,705	474,919,955	119,491,987	51,784,693	72,497,634	8,924,282		84,751,333	216,403,570	1,007,757,253	171,856,215	13,559,078	144,929,400	1,024,904	716,043
Redemption of shares	(4,863,993,237)		(408,422,699)	(61,955,645)	(739,931,932)	(1,440,123,709)	(705,083,600)	(138,773,402)	(95,254,958)	(149,820,485)	(5,692,613)	(6,770,427)	(95,749,761)	(366,185,318)	(329,639,408)	(126,116,197)	(41,631,461)	(149,826,411)		(975,650)
Net addition (redemption) of shares	487,592,113		(180,049,653)	(20,068,743)	316,615,898	206,727,996	(230,163,645)	(19,281,415)	(43,470,265)	(77,322,851)	3,231,669	(6,770,427)	(10,998,428)	(149,781,748)	678,117,845	45,740,018	(28,072,383)	(4,897,011)	1,024,904	(259,607)
Net investment income (loss)	(31,105,278)		(1,118,548)	(386,478)	(4,285,469)	(5,359,486)	(2,415,841)	(460,907)	(857,817)	(585,841)	(118,247)	(213,183)	(3,994,145)	(3,741,601)	(1,766,364)	(528,581)	(1,157,348)	(3,968,608)	(22,247)	(20,862)
Net realized gain (loss)	(160,550,428)		(682,105)	(14,377,068)	76,945,361	(139,402,604)	99,347,798	8,796,882	(5,312,609)	15,119,117	1,593,450	2,296,708	83,683,592	127,860,058	(243,314,151)	(6,459,728)	(9,672,972)	(155,543,194)	(420,528)	(540,304)
Change in net unrealized appreciation/depreciation	(46,083,005)		22,911,077	5,157,541	(24,470,868)	63,590,463	46,381,649	2,899,237	(7,934,003)	2,807,756	418,090	(175,587)	30,499,215	(30,986,352)	(125,247,771)	(31,234,281)	8,888,643	(9,900,963)	(204,515)	143,775
Net income (loss)	(237,738,711)		21,110,424	(9,606,005)	48,189,024	(81,171,627)	143,313,606	11,235,212	(14,104,429)	17,341,032	1,893,293	1,907,938	110,188,662	93,132,105	(370,328,286)	(38,222,590)	(1,941,677)	(169,412,765)	(647,290)	(417,391)
Shareholders' equity, end of period at Dec. 31, 2014	3,332,060,486	[1]	111,459,325	21,459,575	506,556,124	351,789,953	169,210,110	14,688,564	81,861,762	53,007,867	14,021,804	23,120,790	517,191,349	531,471,873	450,562,988	70,433,207	102,003,345	291,169,743	2,981,441	2,118,028
Addition of shares	8,943,932,891	[1]	187,659,682	19,318,111	1,403,231,166	3,192,766,319	796,070,368	37,204,187	13,383,255	84,272,164	23,563,492	2,764,167	328,253,174	124,524,909	2,505,616,928	83,526,876	5,401,300	96,078,803	15,916,613	4,285,016
Redemption of shares	(7,525,116,193)	[1]	(165,941,648)	(8,946,515)	(1,358,113,886)	(2,569,549,298)	(924,949,248)	(50,053,143)	(36,377,117)	(95,719,329)	(21,313,217)	(8,380,675)	(404,314,387)	(411,459,070)	(1,300,173,042)	(54,776,954)	(13,827,755)	(79,831,719)	(6,661,858)	(688,682)
Net addition (redemption) of shares	1,418,816,698	[1]	21,718,034	10,371,596	45,117,280	623,217,021	(128,878,880)	(12,848,956)	(22,993,862)	(11,447,165)	2,250,275	(5,616,508)	(76,061,213)	(286,934,161)	1,205,443,886	28,749,922	(8,426,455)	16,247,084	9,254,755	3,596,334
Net investment income (loss)	(40,036,826)	[1]	(1,150,794)	(240,600)	(5,798,200)	(7,410,148)	(2,166,211)	(177,124)	(703,582)	(516,464)	(178,761)	(209,987)	(5,000,587)	(3,623,678)	(8,473,155)	(761,335)	(796,424)	(2,507,859)	(104,071)	(44,423)
Net realized gain (loss)	(1,164,531,561)	[1]	(19,406,840)	(3,334,581)	69,828,657	(392,223,946)	91,684,782	15,212,833	12,708,936	10,756,758	1,559,643	4,330,688	131,674,081	8,806,429	(896,154,368)	(100,772,476)	(18,606,208)	(78,309,750)	(1,982,317)	(472,907)
Change in net unrealized appreciation/depreciation	(39,700,049)	[1]	(7,346,902)	(605,352)	27,107,500	(27,664,140)	(33,951,907)	(6,412,461)	4,098,510	4,186,942	(142,063)	(1,164,304)	(45,497,112)	(12,347,563)	32,543,124	41,201,866	(4,309,443)	(10,182,576)	707,922	276,816
Net income (loss)	(1,244,268,436)	[1]	(27,904,536)	(4,180,533)	91,137,957	(427,298,234)	55,566,664	8,623,248	16,103,864	14,427,236	1,238,819	2,956,397	81,176,382	(7,164,812)	(872,084,399)	(60,331,945)	(23,712,075)	(91,000,185)	(1,378,466)	(240,514)
Shareholders' equity, end of period at Dec. 31, 2015	3,506,608,748	[1],[2]	105,272,823	27,650,638	642,811,361	547,708,740	95,897,894	10,462,856	74,971,764	55,987,938	17,510,898	20,460,679	522,306,518	237,372,900	783,922,475	38,851,184	69,864,815	216,416,642	10,857,730	5,473,848
Addition of shares	10,633,008,985	[2]	515,131,303	55,230,587	2,867,628,691	4,540,375,465	1,002,034,810	40,020,426	83,353,994	69,113,968	2,109,382		15,418,329	150,763,218	1,094,604,444	40,783,818	41,599,776	104,165,405	4,628,749
Redemption of shares	(9,667,529,469)	[2]	(249,951,175)	(24,737,849)	(3,696,284,684)	(2,976,168,388)	(805,300,056)	(48,901,060)	(83,209,971)	(80,899,441)	(4,280,745)	(2,517,734)	(204,742,206)	(118,175,844)	(1,163,214,447)	(49,841,263)	(22,303,538)	(106,536,792)	(2,458,060)	(199)
Net addition (redemption) of shares	965,479,516	[2]	265,180,128	30,492,738	(828,655,993)	1,564,207,077	196,734,754	(8,880,634)	144,023	(11,785,473)	(2,171,363)	(2,517,734)	(189,323,877)	32,587,374	(68,610,003)	(9,057,445)	19,296,238	(2,371,387)	2,170,689	(199)
Net investment income (loss)	(33,017,182)	[2]	(1,436,647)	(294,491)	(5,396,850)	(8,936,777)	(1,408,964)	(122,172)	(461,423)	(255,853)	(122,728)	(145,652)	(2,764,657)	(1,609,562)	(6,631,380)	(384,486)	(650,951)	(2,179,392)	(74,522)	(45,847)
Net realized gain (loss)	(1,320,602,359)	[2]	(195,469,141)	(11,085,007)	440,379,719	(1,567,324,739)	(67,756,228)	589,999	(12,241,129)	(17,556,630)	663,807	(2,786,709)	(25,711,276)	(22,226,181)	74,043,666	17,571,111	5,815,759	62,342,586	139,113	717,052
Change in net unrealized appreciation/depreciation	157,868,764	[2]	612,983	(944,964)	(21,062,850)	(19,895,547)	(22,509,153)	1,988,745	1,240,412	(3,372,326)	(110,526)	1,602,889	44,885,942	30,657,216	151,007,102	(3,776,978)	(2,198,661)	1,571,491	(1,178,425)	(603,897)
Net income (loss)	(1,195,750,777)	[2]	(196,292,805)	(12,324,462)	413,920,019	(1,596,157,063)	(91,674,345)	2,456,572	(11,462,140)	(21,184,809)	430,553	(1,329,472)	16,410,009	6,821,473	218,419,388	13,409,647	2,966,147	61,734,685	(1,113,834)	67,308
Shareholders' equity, end of period at Dec. 31, 2016	$ 3,276,337,487	[2]	$ 174,160,146	$ 45,818,914	$ 228,075,387	$ 515,758,754	$ 200,958,303	$ 4,038,794	$ 63,653,647	$ 23,017,656	$ 15,770,088	$ 16,613,473	$ 349,392,650	$ 276,781,747	$ 933,731,860	$ 43,203,386	$ 92,127,200	$ 275,779,940	$ 11,914,585	$ 5,540,957
[1]	The operations include the activity of ProShares Ultra Australian Dollar through June 29, 2015, the date of liquidation, respectively. See Note 1.
[2]	The operations include the activity of: ProShares Managed Futures Strategy through March 30, 2016, and ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity through September 1, 2016, the date of liquidation, respectively. See Note 1.

Statements of Changes in Share6

Statements of Changes in Shareholders' Equity (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Addition, shares	191,098,000	[1]	119,309,700	[2]	78,857,360
Redemption, shares	176,102,185	[1]	94,955,635	[2]	86,585,739
Net addition (redemption), shares	14,995,815	[1]	24,354,065	[2]	(7,728,379)
ProShares VIX Short-Term Futures ETF [Member]
Addition, shares	12,265,000		2,495,000		2,115,000
Redemption, shares	5,645,511		1,970,000		2,945,000
Net addition (redemption), shares	6,619,489		525,000		(830,000)
ProShares VIX Mid-Term Futures ETF [Member]
Addition, shares	1,100,000		325,000		593,750
Redemption, shares	525,001		150,000		918,847
Net addition (redemption), shares	574,999		175,000		(325,097)
ProShares Short VIX Short-Term Futures ETF [Member]
Addition, shares	52,950,000		24,100,000		16,100,000
Redemption, shares	63,100,040		19,700,000		9,950,000
Net addition (redemption), shares	(10,150,040)		4,400,000		6,150,000
ProShares Ultra VIX Short-Term Futures ETF [Member]
Addition, shares	28,958,000		2,887,200		408,600
Redemption, shares	17,876,568		2,219,263		323,418
Net addition (redemption), shares	11,081,432		667,937		85,182
ProShares UltraShort Bloomberg Crude Oil [Member]
Addition, shares	18,500,000		21,600,000		31,400,000
Redemption, shares	13,600,004		24,500,000		43,200,000
Net addition (redemption), shares	4,899,996		(2,900,000)		(11,800,000)
ProShares UltraShort Bloomberg Natural Gas [Member]
Addition, shares	950,000		1,350,000		8,550,000
Redemption, shares	1,000,024		1,650,000		9,000,000
Net addition (redemption), shares	(50,024)		(300,000)		(450,000)
ProShares UltraShort Gold [Member]
Addition, shares	1,050,000		150,000		550,000
Redemption, shares	1,000,000		350,000		1,050,000
Net addition (redemption), shares	50,000		(200,000)		(500,000)
ProShares UltraShort Silver [Member]
Addition, shares	1,650,000		1,650,000		1,800,000
Redemption, shares	1,900,002		1,700,000		3,400,000
Net addition (redemption), shares	(250,002)		(50,000)		(1,600,000)
ProShares Short Euro [Member]
Addition, shares	50,000		550,000		250,000
Redemption, shares	100,005		500,000		150,000
Net addition (redemption), shares	(50,005)		50,000		100,000
ProShares UltraShort Australian Dollar [Member]
Addition, shares	0		50,000		0
Redemption, shares	50,005		150,000		150,000
Net addition (redemption), shares	(50,005)		(100,000)		(150,000)
ProShares UltraShort Euro [Member]
Addition, shares	650,000		12,600,000		4,500,000
Redemption, shares	8,200,014		16,100,000		5,050,000
Net addition (redemption), shares	(7,550,014)		(3,500,000)		(550,000)
ProShares UltraShort Yen [Member]
Addition, shares	2,300,000		1,350,000		2,850,000
Redemption, shares	1,550,004		4,600,000		5,200,000
Net addition (redemption), shares	749,996		(3,250,000)		(2,350,000)
ProShares Ultra Bloomberg Crude Oil [Member]
Addition, shares	62,875,000		43,415,000		5,040,000
Redemption, shares	54,025,001		16,690,983		1,045,000
Net addition (redemption), shares	8,849,999		26,724,017		3,995,000
ProShares Ultra Bloomberg Natural Gas [Member]
Addition, shares	3,450,000		2,137,500		1,437,500
Redemption, shares	3,250,001		1,187,815		700,000
Net addition (redemption), shares	199,999		949,685		737,500
ProShares Ultra Gold [Member]
Addition, shares	1,050,000		150,000		300,000
Redemption, shares	600,014		350,000		950,000
Net addition (redemption), shares	449,986		(200,000)		(650,000)
ProShares Ultra Silver [Member]
Addition, shares	2,800,000		2,700,000		2,487,500
Redemption, shares	2,550,007		2,100,000		2,440,974
Net addition (redemption), shares	249,993		600,000		46,526
ProShares Ultra Euro [Member]
Addition, shares	300,000		350,000		50,000
Redemption, shares	150,014		400,000		0
Net addition (redemption), shares	149,986		550,000		50,000
ProShares Ultra Yen [Member]
Addition, shares	0		75,000		12,500
Redemption, shares	4		12,530		12,500
Net addition (redemption), shares	(4)		62,470		0
[1]	The operations include the activity of: ProShares Managed Futures Strategy through March 30, 2016, and ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity through September 1, 2016, the date of liquidation, respectively. See Note 1.
[2]	The operations include the activity of ProShares Ultra Australian Dollar through June 29, 2015, the date of liquidation, respectively. See Note 1.

Statements of Cash Flows

Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Cash flow from operating activities
Net income (loss)	$ (1,195,750,777)	[1]	$ (1,244,268,436)	[2]	$ (237,738,711)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	80,870,728	[1]	35,477,903	[2]	(61,515,085)
Purchases of short-term U.S. government and agency obligations	(18,373,450,463)	[1]	(17,070,603,480)	[2]	(12,667,505,150)
Proceeds from sales or maturities of short-term U.S government and agency obligations	18,657,310,693	[1]	16,764,420,326	[2]	12,509,293,100
Net amortization and accretion on short-term U.S government and agency obligations	(9,128,007)	[1]	(1,530,269)	[2]	(1,148,962)
Net realized gain (loss) on investments	15,768	[1]	(47,732)	[2]	(123,212)
Change in unrealized appreciation/depreciation on investments	(179,899,377)	[1]	79,893,405	[2]	55,258,334
Decrease (Increase) in receivable on futures contracts	(14,207,535)	[1]	28,346,999	[2]	(49,071,751)
Decrease (Increase) in Limitation by Sponsor			9,474	[2]	(9,474)
Change in offering cost			49,384	[2]	(49,384)
Increase (Decrease) in payable to Sponsor	(116,609)	[1]	181,800	[2]	134,637
Increase (Decrease) in brokerage commissions and fees payable	(36,239)	[1]	39,148	[2]
Increase (Decrease) in payable on futures contracts	894,352	[1]	(43,327,729)	[2]	36,334,537
Increase (Decrease) in payable for offering costs			(65,785)	[2]	65,785
Net cash provided by (used in) operating activities	(1,033,497,466)	[1]	(1,451,424,992)	[2]	(416,075,336)
Cash flow from financing activities
Proceeds from addition of shares	10,681,055,123	[1]	8,953,972,200	[2]	5,304,403,567
Payment on shares redeemed	(9,656,124,409)	[1]	(7,490,397,088)	[2]	(4,875,819,732)
Net cash provided by (used in) financing activities	1,024,930,714	[1]	1,463,575,112	[2]	428,583,835
Net increase (decrease) in cash	(8,566,752)	[1]	12,150,120	[2]	12,508,499
Cash, beginning of period	48,049,351	[1],[2]	35,899,231	[2]	23,390,732
Cash, end of period	39,482,599	[1]	48,049,351	[1],[2]	35,899,231	[2]
ProShares VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)	(196,292,805)		(27,904,536)		21,110,424
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	(11,347,310)		12,551,205		45,580,600
Purchases of short-term U.S. government and agency obligations	(920,726,003)		(599,166,468)		(674,817,750)
Proceeds from sales or maturities of short-term U.S government and agency obligations	869,284,481		585,220,876		800,418,587
Net amortization and accretion on short-term U.S government and agency obligations	(466,392)		(41,722)		(46,740)
Net realized gain (loss) on investments	(6,650)		(1,703)		(12,242)
Change in unrealized appreciation/depreciation on investments	(3,010)		3,657		6,229
Decrease (Increase) in receivable on futures contracts	(3,220,337)		8,053,303		(6,138,219)
Increase (Decrease) in payable to Sponsor	10,220		(3,334)		(128,002)
Net cash provided by (used in) operating activities	(262,767,806)		(21,288,722)		185,972,887
Cash flow from financing activities
Proceeds from addition of shares	515,131,303		187,659,682		228,373,046
Payment on shares redeemed	(249,951,175)		(165,941,648)		(416,984,894)
Net cash provided by (used in) financing activities	265,180,128		21,718,034		(188,611,848)
Net increase (decrease) in cash	2,412,322		429,312		(2,638,961)
Cash, beginning of period	2,124,103		1,694,791		4,333,752
Cash, end of period	4,536,425		2,124,103		1,694,791
ProShares VIX Mid-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)	(12,324,462)		(4,180,533)		(9,606,005)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	(71,865)		926,200		6,547,440
Purchases of short-term U.S. government and agency obligations	(175,738,460)		(95,567,067)		(161,570,392)
Proceeds from sales or maturities of short-term U.S government and agency obligations	156,335,340		93,706,007		183,523,221
Net amortization and accretion on short-term U.S government and agency obligations	(107,408)		(8,293)		(16,573)
Net realized gain (loss) on investments	(499)		(1,355)		(1,742)
Change in unrealized appreciation/depreciation on investments	1,079		327		(187)
Decrease (Increase) in receivable on futures contracts	(200,353)		1,741,140		(1,682,594)
Increase (Decrease) in payable to Sponsor	12,194		(2,358)		(22,712)
Net cash provided by (used in) operating activities	(32,094,434)		(3,385,932)		17,170,456
Cash flow from financing activities
Proceeds from addition of shares	55,230,587		19,318,111		41,886,902
Payment on shares redeemed	(22,652,829)		(16,894,470)		(59,329,673)
Net cash provided by (used in) financing activities	32,577,758		2,423,641		(17,442,771)
Net increase (decrease) in cash	483,324		(962,291)		(272,315)
Cash, beginning of period	671,791		1,634,082		1,906,397
Cash, end of period	1,155,115		671,791		1,634,082
ProShares Short VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)	413,920,019		91,137,957		48,189,024
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	68,204,421		(38,283,455)		(51,692,300)
Purchases of short-term U.S. government and agency obligations	(2,915,165,614)		(2,104,319,382)		(1,647,460,143)
Proceeds from sales or maturities of short-term U.S government and agency obligations	3,281,269,459		2,016,127,119		1,306,143,088
Net amortization and accretion on short-term U.S government and agency obligations	(1,126,057)		(180,670)		(81,544)
Net realized gain (loss) on investments	11,670		(35,629)		(19,363)
Change in unrealized appreciation/depreciation on investments	6,824		(8,936)		1,764
Decrease (Increase) in receivable on futures contracts	(1,059,418)				603,833
Increase (Decrease) in payable to Sponsor	(277,306)		100,052		289,792
Increase (Decrease) in payable on futures contracts	(1,095,271)		(29,599,748)		31,020,019
Net cash provided by (used in) operating activities	844,688,727		(65,062,692)		(313,005,830)
Cash flow from financing activities
Proceeds from addition of shares	2,877,792,848		1,393,067,009		1,056,547,830
Payment on shares redeemed	(3,725,781,791)		(1,331,975,560)		(736,573,151)
Net cash provided by (used in) financing activities	(847,988,943)		61,091,449		319,974,679
Net increase (decrease) in cash	(3,300,216)		(3,971,243)		6,968,849
Cash, beginning of period	5,150,976		9,122,219		2,153,370
Cash, end of period	1,850,760		5,150,976		9,122,219
ProShares Ultra VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)	(1,596,157,063)		(427,298,234)		(81,171,627)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	(9,015,025)		54,559,100		(9,805,950)
Purchases of short-term U.S. government and agency obligations	(4,242,730,514)		(3,411,109,730)		(2,489,268,812)
Proceeds from sales or maturities of short-term U.S government and agency obligations	4,248,037,733		3,155,524,185		2,416,241,031
Net amortization and accretion on short-term U.S government and agency obligations	(1,634,060)		(156,187)		(72,700)
Net realized gain (loss) on investments	(15,949)		49,718		(9,921)
Change in unrealized appreciation/depreciation on investments	28,844		(26,647)		4,701
Decrease (Increase) in receivable on futures contracts	(17,971,713)		24,535,963		(42,531,441)
Increase (Decrease) in payable to Sponsor	(3,115)		124,528		113,369
Increase (Decrease) in payable on futures contracts					(3,356,803)
Net cash provided by (used in) operating activities	(1,619,460,862)		(603,797,304)		(209,858,153)
Cash flow from financing activities
Proceeds from addition of shares	4,573,362,937		3,172,328,095		1,645,206,121
Payment on shares redeemed	(2,952,014,084)		(2,563,186,119)		(1,433,851,653)
Net cash provided by (used in) financing activities	1,621,348,853		609,141,976		211,354,468
Net increase (decrease) in cash	1,887,991		5,344,672		1,496,315
Cash, beginning of period	9,081,964		3,737,292		2,240,977
Cash, end of period	10,969,955		9,081,964		3,737,292
ProShares UltraShort Bloomberg Crude Oil [Member]
Cash flow from operating activities
Net income (loss)	(91,674,345)		55,566,664		143,313,606
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	5,222,910		2,138,235		(4,659,270)
Purchases of short-term U.S. government and agency obligations	(1,099,847,442)		(1,238,357,695)		(1,127,199,240)
Proceeds from sales or maturities of short-term U.S government and agency obligations	974,343,507		1,290,330,607		1,243,311,872
Net amortization and accretion on short-term U.S government and agency obligations	(500,160)		(60,884)		(110,620)
Net realized gain (loss) on investments	4,064		(14,458)		(20,701)
Change in unrealized appreciation/depreciation on investments	18,617,825		20,609,817		(29,342,273)
Decrease (Increase) in receivable on futures contracts			1,293,531		210,412
Increase (Decrease) in payable to Sponsor	61,748		(27,242)		(73,442)
Increase (Decrease) in brokerage commissions and fees payable	(8,453)		8,453
Increase (Decrease) in payable on futures contracts	(837,281)		850,883
Net cash provided by (used in) operating activities	(194,617,627)		132,337,911		225,430,344
Cash flow from financing activities
Proceeds from addition of shares	1,002,034,810		796,070,368		474,919,955
Payment on shares redeemed	(805,300,056)		(928,803,902)		(701,228,946)
Net cash provided by (used in) financing activities	196,734,754		(132,733,534)		(226,308,991)
Net increase (decrease) in cash	2,117,127		(395,623)		(878,647)
Cash, beginning of period	598,645		994,268		1,872,915
Cash, end of period	2,715,772		598,645		994,268
ProShares UltraShort Bloomberg Natural Gas [Member]
Cash flow from operating activities
Net income (loss)	2,456,572		8,623,248		11,235,212
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	1,336,005		2,359,170		(2,021,030)
Purchases of short-term U.S. government and agency obligations	(46,397,398)		(59,678,558)		(208,007,837)
Proceeds from sales or maturities of short-term U.S government and agency obligations	51,635,055		60,242,291		217,631,381
Net amortization and accretion on short-term U.S government and agency obligations	(19,053)		(5,830)		(16,306)
Net realized gain (loss) on investments	(3,139)		(29)		(5,163)
Change in unrealized appreciation/depreciation on investments	388		(168)		(72)
Decrease (Increase) in receivable on futures contracts	(105,872)		923,531		597,017
Increase (Decrease) in payable to Sponsor	(7,499)		620		309
Increase (Decrease) in brokerage commissions and fees payable	(1,764)		1,908
Increase (Decrease) in payable on futures contracts	(785,170)		785,170
Net cash provided by (used in) operating activities	8,108,125		13,251,353		19,413,511
Cash flow from financing activities
Proceeds from addition of shares	40,020,426		37,204,187		119,491,987
Payment on shares redeemed	(48,901,060)		(50,053,143)		(138,773,402)
Net cash provided by (used in) financing activities	(8,880,634)		(12,848,956)		(19,281,415)
Net increase (decrease) in cash	(772,509)		402,397		132,096
Cash, beginning of period	1,099,140		696,743		564,647
Cash, end of period	326,631		1,099,140		696,743
ProShares UltraShort Gold [Member]
Cash flow from operating activities
Net income (loss)	(11,462,140)		16,103,864		(14,104,429)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	78,050		(82,450)		7,150
Purchases of short-term U.S. government and agency obligations	(320,273,448)		(254,497,395)		(320,898,147)
Proceeds from sales or maturities of short-term U.S government and agency obligations	332,879,016		265,587,947		385,891,756
Net amortization and accretion on short-term U.S government and agency obligations	(164,568)		(31,999)		(40,646)
Net realized gain (loss) on investments	378		(1,301)		(3,873)
Change in unrealized appreciation/depreciation on investments	(1,226,652)		(4,088,770)		7,914,963
Decrease (Increase) in receivable on futures contracts	(1,280)		3,260		(2,960)
Increase (Decrease) in payable to Sponsor	(4,097)		(10,170)		(53,758)
Increase (Decrease) in payable on futures contracts	(80)		80
Net cash provided by (used in) operating activities	(174,821)		22,983,066		58,710,056
Cash flow from financing activities
Proceeds from addition of shares	83,353,994		13,383,255		51,784,693
Payment on shares redeemed	(83,209,971)		(36,377,117)		(110,529,962)
Net cash provided by (used in) financing activities	144,023		(22,993,862)		(58,745,269)
Net increase (decrease) in cash	(30,798)		(10,796)		(35,213)
Cash, beginning of period	151,638		162,434		197,647
Cash, end of period	120,840		151,638		162,434
ProShares UltraShort Silver [Member]
Cash flow from operating activities
Net income (loss)	(21,184,809)		14,427,236		17,341,032
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	(2,860)		2,860		7,700
Purchases of short-term U.S. government and agency obligations	(149,552,689)		(220,073,123)		(243,452,982)
Proceeds from sales or maturities of short-term U.S government and agency obligations	178,824,533		221,589,835		306,085,077
Net amortization and accretion on short-term U.S government and agency obligations	(93,482)		(23,831)		(30,901)
Net realized gain (loss) on investments	1,916		2,787		(4,234)
Change in unrealized appreciation/depreciation on investments	3,393,666		(4,182,532)		(2,820,396)
Decrease (Increase) in receivable on futures contracts	(1,900)		6,380		(4,320)
Increase (Decrease) in payable to Sponsor	(27,635)		4,831		(51,786)
Net cash provided by (used in) operating activities	11,356,740		11,754,443		77,069,190
Cash flow from financing activities
Proceeds from addition of shares	69,113,968		84,272,164		72,497,634
Payment on shares redeemed	(80,899,441)		(95,719,329)		(149,820,485)
Net cash provided by (used in) financing activities	(11,785,473)		(11,447,165)		(77,322,851)
Net increase (decrease) in cash	(428,733)		307,278		(253,661)
Cash, beginning of period	514,784		207,506		461,167
Cash, end of period	86,051		514,784		207,506
ProShares Short Euro [Member]
Cash flow from operating activities
Net income (loss)	430,553		1,238,819		1,893,293
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	101,145		(260,865)		(114,180)
Purchases of short-term U.S. government and agency obligations	(53,315,548)		(56,503,913)		(36,652,485)
Proceeds from sales or maturities of short-term U.S government and agency obligations	55,336,935		53,441,831		32,472,610
Net amortization and accretion on short-term U.S government and agency obligations	(32,959)		(4,504)		(4,716)
Net realized gain (loss) on investments	(33)		(218)		(402)
Change in unrealized appreciation/depreciation on investments	(12)		170		472
Decrease (Increase) in receivable on futures contracts	84,235		(20,985)		(54,150)
Increase (Decrease) in payable to Sponsor	(1,409)		2,967		4,134
Increase (Decrease) in payable on futures contracts	76,666
Net cash provided by (used in) operating activities	2,679,573		(2,106,698)		(2,455,424)
Cash flow from financing activities
Proceeds from addition of shares	2,109,382		23,563,492		8,924,282
Payment on shares redeemed	(4,280,745)		(21,313,217)		(5,692,613)
Net cash provided by (used in) financing activities	(2,171,363)		2,250,275		3,231,669
Net increase (decrease) in cash	508,210		143,577		776,245
Cash, beginning of period	1,783,802		1,640,225		863,980
Cash, end of period	2,292,012		1,783,802		1,640,225
ProShares UltraShort Australian Dollar [Member]
Cash flow from operating activities
Net income (loss)	(1,329,472)		2,956,397		1,907,938
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	(857,695)		963,152		121,418
Purchases of short-term U.S. government and agency obligations	(51,162,005)		(61,647,966)		(41,309,385)
Proceeds from sales or maturities of short-term U.S government and agency obligations	56,705,513		63,512,421		45,247,467
Net amortization and accretion on short-term U.S government and agency obligations	(43,459)		(5,998)		(8,225)
Net realized gain (loss) on investments	(495)		(225)		(492)
Change in unrealized appreciation/depreciation on investments	(279)		553		1,463
Decrease (Increase) in receivable on futures contracts	52,491		10,043		(62,534)
Increase (Decrease) in payable to Sponsor	(3,812)		(1,630)		(3,620)
Increase (Decrease) in payable on futures contracts	32,340				(86,166)
Net cash provided by (used in) operating activities	3,393,127		5,786,747		5,807,864
Cash flow from financing activities
Proceeds from addition of shares			2,764,167
Payment on shares redeemed	(2,517,734)		(8,380,675)		(6,770,427)
Net cash provided by (used in) financing activities	(2,517,734)		(5,616,508)		(6,770,427)
Net increase (decrease) in cash	875,393		170,239		(962,563)
Cash, beginning of period	1,958,996		1,788,757		2,751,320
Cash, end of period	2,834,389		1,958,996		1,788,757
ProShares UltraShort Euro [Member]
Cash flow from operating activities
Net income (loss)	16,410,009		81,176,382		110,188,662
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations	(1,535,809,146)		(1,901,774,819)		(1,291,071,881)
Proceeds from sales or maturities of short-term U.S government and agency obligations	1,745,625,938		1,842,981,707		1,241,999,870
Net amortization and accretion on short-term U.S government and agency obligations	(1,012,886)		(263,820)		(199,596)
Net realized gain (loss) on investments	(242)		(22,509)		(4,637)
Change in unrealized appreciation/depreciation on investments	(44,885,942)		45,497,112		(30,499,215)
Increase (Decrease) in payable to Sponsor	(123,177)		28,455		40,427
Net cash provided by (used in) operating activities	180,204,554		67,622,508		30,453,630
Cash flow from financing activities
Proceeds from addition of shares	15,418,329		341,209,778		71,794,729
Payment on shares redeemed	(203,078,964)		(399,206,157)		(101,720,845)
Net cash provided by (used in) financing activities	(187,660,635)		(57,996,379)		(29,926,116)
Net increase (decrease) in cash	(7,456,081)		9,626,129		527,514
Cash, beginning of period	10,372,583		746,454		218,940
Cash, end of period	2,916,502		10,372,583		746,454
ProShares UltraShort Yen [Member]
Cash flow from operating activities
Net income (loss)	6,821,473		(7,164,812)		93,132,105
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations	(1,044,852,917)		(1,322,695,643)		(1,219,436,703)
Proceeds from sales or maturities of short-term U.S government and agency obligations	1,048,290,293		1,595,758,281		1,245,266,414
Net amortization and accretion on short-term U.S government and agency obligations	(531,771)		(135,814)		(197,253)
Net realized gain (loss) on investments	5,910		3,035		(13,833)
Change in unrealized appreciation/depreciation on investments	(30,657,216)		12,347,563		30,986,352
Increase (Decrease) in payable to Sponsor	21,603		(228,916)		2,264
Net cash provided by (used in) operating activities	(20,902,625)		277,883,694		149,739,346
Cash flow from financing activities
Proceeds from addition of shares	150,763,218		124,524,909		216,403,570
Payment on shares redeemed	(126,970,573)		(402,664,341)		(366,185,318)
Net cash provided by (used in) financing activities	23,792,645		(278,139,432)		(149,781,748)
Net increase (decrease) in cash	2,890,020		(255,738)		(42,402)
Cash, beginning of period	276,968		532,706		575,108
Cash, end of period	3,166,988		276,968		532,706
ProShares Ultra Bloomberg Crude Oil [Member]
Cash flow from operating activities
Net income (loss)	218,419,388		(872,084,399)		(370,328,286)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	26,962,210		(12,966,690)		(30,783,225)
Purchases of short-term U.S. government and agency obligations	(3,746,504,691)		(4,300,690,737)		(1,059,239,810)
Proceeds from sales or maturities of short-term U.S government and agency obligations	3,661,263,949		3,970,639,458		729,547,449
Net amortization and accretion on short-term U.S government and agency obligations	(2,170,633)		(382,657)		(68,292)
Net realized gain (loss) on investments	17,374		(22,728)		(11,806)
Change in unrealized appreciation/depreciation on investments	(127,540,623)		(3,997,651)		78,146,323
Decrease (Increase) in receivable on futures contracts	5,150,763		(5,150,763)
Increase (Decrease) in payable to Sponsor	176,115		316,922		185,707
Increase (Decrease) in brokerage commissions and fees payable	(22,668)		25,000
Increase (Decrease) in payable on futures contracts	1,993,438		(5,817,266)		4,820,056
Net cash provided by (used in) operating activities	37,744,622		(1,230,131,511)		(647,731,884)
Cash flow from financing activities
Proceeds from addition of shares	1,099,498,953		2,529,448,592		979,031,080
Payment on shares redeemed	(1,139,850,399)		(1,297,658,086)		(329,639,408)
Net cash provided by (used in) financing activities	(40,351,446)		1,231,790,506		649,391,672
Net increase (decrease) in cash	(2,606,824)		1,658,995		1,659,788
Cash, beginning of period	4,008,379		2,349,384		689,596
Cash, end of period	1,401,555		4,008,379		2,349,384
ProShares Ultra Bloomberg Natural Gas [Member]
Cash flow from operating activities
Net income (loss)	13,409,647		(60,331,945)		(38,222,590)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	(17,490)		13,538,800		(14,531,880)
Purchases of short-term U.S. government and agency obligations	(136,277,314)		(262,203,648)		(269,350,242)
Proceeds from sales or maturities of short-term U.S government and agency obligations	126,972,823		288,829,035		274,880,518
Net amortization and accretion on short-term U.S government and agency obligations	(72,943)		(18,846)		(15,961)
Net realized gain (loss) on investments	698		(4,341)		(5,068)
Change in unrealized appreciation/depreciation on investments	819		296		1,537
Decrease (Increase) in receivable on futures contracts	3,065,769		(3,065,769)
Increase (Decrease) in payable to Sponsor	10,926		(40,680)		(15,937)
Increase (Decrease) in brokerage commissions and fees payable	(3,190)		3,623
Increase (Decrease) in payable on futures contracts	1,528,005		(9,552,314)		3,923,782
Net cash provided by (used in) operating activities	8,617,750		(32,845,789)		(43,335,841)
Cash flow from financing activities
Proceeds from addition of shares	40,783,818		87,380,298		168,002,793
Payment on shares redeemed	(49,841,263)		(54,776,954)		(126,116,197)
Net cash provided by (used in) financing activities	(9,057,445)		32,603,344		41,886,596
Net increase (decrease) in cash	(439,695)		(242,445)		(1,449,245)
Cash, beginning of period	1,411,137		1,653,582		3,102,827
Cash, end of period	971,442		1,411,137		1,653,582
ProShares Ultra Gold [Member]
Cash flow from operating activities
Net income (loss)	2,966,147		(23,712,075)		(1,941,677)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	(4,950)		550		7,150
Purchases of short-term U.S. government and agency obligations	(406,481,915)		(260,988,119)		(407,203,130)
Proceeds from sales or maturities of short-term U.S government and agency obligations	383,282,007		291,047,782		446,217,714
Net amortization and accretion on short-term U.S government and agency obligations	(249,321)		(42,700)		(54,755)
Net realized gain (loss) on investments	806		393		(1,361)
Change in unrealized appreciation/depreciation on investments	2,184,901		4,299,663		(8,869,503)
Decrease (Increase) in receivable on futures contracts	80		(80)
Increase (Decrease) in payable to Sponsor	15,554		(28,602)		(25,929)
Increase (Decrease) in payable on futures contracts	1,280		(3,260)		2,960
Net cash provided by (used in) operating activities	(18,285,411)		10,573,552		28,131,469
Cash flow from financing activities
Proceeds from addition of shares	41,599,776		5,401,300		13,559,078
Payment on shares redeemed	(22,303,538)		(15,827,473)		(41,728,968)
Net cash provided by (used in) financing activities	19,296,238		(10,426,173)		(28,169,890)
Net increase (decrease) in cash	1,010,827		147,379		(38,421)
Cash, beginning of period	251,524		104,145		142,566
Cash, end of period	1,262,351		251,524		104,145
ProShares Ultra Silver [Member]
Cash flow from operating activities
Net income (loss)	61,734,685		(91,000,185)		(169,412,765)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Decrease (Increase) in segregated cash balances with brokers for futures contracts	2,860		(2,860)		7,700
Purchases of short-term U.S. government and agency obligations	(1,412,194,485)		(835,846,036)		(1,432,093,309)
Proceeds from sales or maturities of short-term U.S government and agency obligations	1,356,640,583		902,567,408		1,594,662,608
Net amortization and accretion on short-term U.S government and agency obligations	(842,217)		(156,353)		(177,671)
Net realized gain (loss) on investments	(145)		441		(8,226)
Change in unrealized appreciation/depreciation on investments	(1,589,821)		10,175,106		9,913,603
Increase (Decrease) in payable to Sponsor	40,213		(72,982)		(125,078)
Increase (Decrease) in payable on futures contracts	415		(4,895)		4,320
Net cash provided by (used in) operating activities	3,792,088		(14,340,356)		2,771,182
Cash flow from financing activities
Proceeds from addition of shares	104,165,405		96,078,803		144,929,400
Payment on shares redeemed	(106,536,792)		(81,799,551)		(147,858,579)
Net cash provided by (used in) financing activities	(2,371,387)		14,279,252		(2,929,179)
Net increase (decrease) in cash	1,420,701		(61,104)		(157,997)
Cash, beginning of period	243,900		305,004		463,001
Cash, end of period	1,664,601		243,900		305,004
ProShares Ultra Euro [Member]
Cash flow from operating activities
Net income (loss)	(1,113,834)		(1,378,466)		(647,290)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations	(48,066,675)		(42,137,395)		(7,297,855)
Proceeds from sales or maturities of short-term U.S government and agency obligations	47,805,780		32,950,150		7,338,926
Net amortization and accretion on short-term U.S government and agency obligations	(25,015)		(2,797)		(1,083)
Net realized gain (loss) on investments	(154)		109		(5)
Change in unrealized appreciation/depreciation on investments	1,178,425		(707,922)		204,515
Increase (Decrease) in payable to Sponsor	(415)		8,041		(718)
Net cash provided by (used in) operating activities	(221,888)		(11,268,280)		(403,510)
Cash flow from financing activities
Proceeds from addition of shares	4,628,749		15,916,613		1,024,904
Payment on shares redeemed	(4,027,778)		(5,092,140)
Net cash provided by (used in) financing activities	600,971		10,824,473		1,024,904
Net increase (decrease) in cash	379,083		(443,807)		621,394
Cash, beginning of period	227,310		671,117		49,723
Cash, end of period	606,393		227,310		671,117
ProShares Ultra Yen [Member]
Cash flow from operating activities
Net income (loss)	67,308		(240,514)		(417,391)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Purchases of short-term U.S. government and agency obligations	(28,924,289)		(12,557,564)		(5,540,122)
Proceeds from sales or maturities of short-term U.S government and agency obligations	28,727,215		8,779,817		7,181,715
Net amortization and accretion on short-term U.S government and agency obligations	(16,858)		(3,609)		(1,101)
Net realized gain (loss) on investments	34		(6)		(94)
Change in unrealized appreciation/depreciation on investments	603,897		(276,816)		(143,775)
Increase (Decrease) in payable to Sponsor	212		2,810		(822)
Net cash provided by (used in) operating activities	457,519		(4,295,882)		1,078,410
Cash flow from financing activities
Proceeds from addition of shares			4,285,016		716,043
Payment on shares redeemed	(199)		(688,682)		(975,650)
Net cash provided by (used in) financing activities	(199)		3,596,334		(259,607)
Net increase (decrease) in cash	457,320		(699,548)		818,803
Cash, beginning of period	147,371		846,919		28,116
Cash, end of period	$ 604,691		$ 147,371		$ 846,919
[1]	The operations include the activity of: ProShares Managed Futures Strategy through March 30, 2016, and ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity through September 1, 2016, the date of liquidation, respectively. See Note 1.
[2]	The operations include the activity of ProShares Ultra Australian Dollar through June 29, 2015, the date of liquidation, respectively. See Note 1.

Organization

Organization	12 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	NOTE 1 – ORGANIZATION ProShares Trust II (formerly known as the Commodities and Currencies Trust) (the “Trust”) is a Delaware statutory trust formed on October 9, 2007 and is currently organized into separate series (each, a “Fund” and collectively, the “Funds”). As of December 31, 2016, the following eighteen series of the Trust have commenced investment operations: (i) ProShares VIX Short-Term Futures ETF and ProShares VIX Mid-Term On February 18, 2016, the Trust announced plans to liquidate ProShares Managed Futures Strategy (ticker symbol: FUTS). ProShares Managed Futures Strategy was closed to purchases and redemptions as of the close of regular trading on the NYSE Arca on March 18, 2016. Beginning March 21, 2016, no secondary market for ProShares Managed Futures Strategy’s Shares remained. Proceeds of the liquidation were distributed to shareholders on March 30, 2016. Any shareholders remaining in the fund on March 30, 2016 automatically had their shares redeemed for cash at ProShares Managed Futures Strategy’s net asset value per Share as of March 21, 2016. On March 31, 2016, the NYSE Arca filed a Form 25 removing the listing of ProShares Managed Futures Strategy on the NYSE Arca. On April 11, 2016 a Form 15 was filed with the SEC terminating the registration of ProShares Managed Futures Strategy. On July 25, 2016, the Trust announced plans to liquidate ProShares Ultra Bloomberg Commodity (ticker symbol: UCD) and ProShares UltraShort Bloomberg Commodity (ticker symbol: CMD). ProShares Ultra Bloomberg Commodity and UltraShort Bloomberg Commodity were closed to purchases and redemptions as of the close of regular trading on the NYSE Arca on August 25, 2016. Beginning August 26, 2016, no secondary market for ProShares Ultra Bloomberg Commodity’s and ProShares UltraShort Bloomberg Commodity’s Shares remained. Proceeds of the liquidation were distributed to shareholders on September 1, 2016. Any shareholders remaining in each liquidating Fund on September 1, 2016 automatically had their shares redeemed for cash at each liquidating Fund’s net asset value per Share as of August 26, 2016. On September 2, 2016, the NYSE Arca filed a Form 25 removing the listing of ProShares Ultra Bloomberg Commodity and UltraShort Bloomberg Commodity on the NYSE Arca. On September 27, 2016, a Form 15 was filed with the SEC terminating the registration of ProShares Ultra Bloomberg Commodity and ProShares UltraShort Bloomberg Commodity. The Trust had no operations prior to November 24, 2008, other than matters relating to its organization, the registration of each series under the Securities Act of 1933, as amended, and the sale and issuance to ProShare Capital Management LLC (the “Sponsor”) of fourteen Shares at an aggregate purchase price of $350 in each of the following Funds: ProShares UltraShort Bloomberg Crude Oil, ProShares UltraShort Gold, ProShares UltraShort Silver, ProShares UltraShort Euro, ProShares UltraShort Yen, ProShares Ultra Bloomberg Crude Oil, ProShares Ultra Gold, ProShares Ultra Silver, ProShares Ultra Euro and ProShares Ultra Yen. Groups of Funds are collectively referred to in several different ways. References to “Short Funds,” “UltraShort Funds,” or “Ultra Funds” refer to the different Funds based upon their investment objectives, but without distinguishing among the Funds’ benchmarks. References to “Commodity Index Funds,” “Commodity Funds” and “Currency Funds” refer to the different Funds according to their general benchmark categories without distinguishing among the Funds’ investment objectives or Fund-specific benchmarks. References to “VIX Funds” refer to the different Funds based upon their investment objective and their general benchmark categories. Each “Short” Fund seeks daily investment results (before fees and expenses) that correspond to the inverse (-1x) (-2x) The Geared Funds do not seek to achieve their stated investment objective over a period of time greater than a single day because mathematical compounding prevents the Geared Funds from achieving such results. Accordingly, results over periods of time greater than a single day should not be expected to be a simple multiple (e.g., -1x, -2x Each of the Funds generally invests in Financial Instruments (i.e., instruments whose value is derived from the value of an underlying asset, rate or index, including futures contracts, swap agreements, forward contracts and other instruments) as a substitute for investing directly in commodities, currencies, or spot volatility products in order to gain exposure to its applicable underlying commodity futures index, commodity, currency exchange rate or equity volatility index. Financial Instruments also are used to produce economically “inverse,” “inverse leveraged” or “leveraged” investment results for the Geared Funds. Share Splits and Reverse Share Splits The table below includes Share splits and reverse Share splits for the Funds during the years ended December 31, 2014, 2015 and 2016. The ticker symbols for these Funds did not change, and each Fund continues to trade on the NYSE Arca. Fund Execution Date (Prior to Opening of Trading) Type of Split Date Trading Resumed at Post- Split Price ProShares Short VIX Short-Term Futures ETF January 21, 2014 2-for-1 Share split January 24, 2014 ProShares Ultra VIX Short-Term Futures ETF January 21, 2014 1-for-4 reverse Share split January 24, 2014 ProShares Ultra Silver January 21, 2014 1-for-4 reverse Share split January 24, 2014 ProShares VIX Mid-Term Futures November 6, 2014 1-for-4 reverse Share split November 6, 2014 ProShares Ultra VIX Short-Term Futures ETF May 20, 2015 1-for-5 reverse Share split May 20, 2015 ProShares Ultra Bloomberg Crude Oil May 20, 2015 1-for-5 reverse Share split May 20, 2015 ProShares Ultra Bloomberg Natural Gas May 20, 2015 1-for-4 May 20, 2015 ProShares Ultra Yen May 20, 2015 1-for-4 May 20, 2015 ProShares UltraShort Silver November 13, 2015 2-for-1 November 13, 2015 ProShares UltraShort Bloomberg Natural Gas July 20, 2016 3-for-1 July 25, 2016 ProShares VIX Short-Term Futures ETF July 25, 2016 1-for-5 July 25, 2016 ProShares Ultra VIX Short-Term Futures ETF July 25, 2016 1-for-5 July 25, 2016 The reverse splits were applied retroactively for all periods presented, reducing the number of Shares outstanding for each of the Funds, and resulted in a proportionate increase in the price per Share and per Share information of each such Fund. Therefore, the reverse splits did not change the aggregate net asset value of a shareholder’s investment at the time of the reverse split. The splits were applied retroactively for all periods presented, increasing the number of Shares outstanding for each of the Funds, and resulted in a proportionate decrease in the price per Share and per Share information of each such Fund. Therefore, the splits did not change the aggregate net asset value of a shareholder’s investment at the time of the split.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Significant Accounting Policies	NOTE 2 – SIGNIFICANT ACCOUNTING POLICIES Each Fund is an investment company, as defined by Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 946 “Financial Services — Investment Companies.” As such, the Funds follow the investment company accounting and reporting guidance. The following is a summary of significant accounting policies followed by each Fund, as applicable, in preparation of its financial statements. These policies are in conformity with accounting principles generally accepted in the United States of America (“GAAP”). Use of Estimates & Indemnifications The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the normal course of business, the Trust enters into contracts that contain a variety of representations which provide general indemnifications. The Trust’s maximum exposure under these arrangements cannot be known; however, the Trust expects any risk of loss to be remote. Basis of Presentation Pursuant to rules and regulations of the U.S. Securities and Exchange Commission (“SEC”), audited financial statements are presented for the Trust as a whole, as the SEC registrant, and for each Fund individually. The debts, liabilities, obligations and expenses incurred, contracted for or otherwise existing with respect to a particular Fund shall be enforceable only against the assets of such Fund and not against the assets of the Trust generally or any other Fund. Accordingly, the assets of one Fund of the Trust include only those funds and other assets that are paid to, held by or distributed to the Trust for the purchase of Shares in that Fund. Statement of Cash Flows The cash amount shown in the Statements of Cash Flows is the amount reported as cash in the Statement of Financial Condition dated December 31, 2016 and 2015, and represents non-segregated Final Net Asset Value for Fiscal Period The cut-off Create/Redeem Cut-off* NAV Calculation Time NAV Calculation Date UltraShort Silver, Ultra Silver 6:30 a.m. 7:00 a.m. December 30 UltraShort Gold, Ultra Gold 9:30 a.m. 10:00 a.m. December 30 UltraShort Bloomberg Crude Oil, Ultra Bloomberg Crude Oil 2:00 p.m. 2:30 p.m. December 30 UltraShort Bloomberg Natural Gas, Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 30 UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 30 Short Euro, 3:00 p.m. 4:00 p.m. December 30 UltraShort Euro, Ultra Euro UltraShort Yen, Ultra Yen 3:00 p.m. 4:00 p.m. December 30 VIX Short-Term Futures ETF, Ultra VIX Short-Term Futures ETF, Short VIX Short-Term Futures ETF 2:00 p.m. 4:15 p.m. December 30 VIX Mid-Term 2:00 p.m. 4:15 p.m. December 30 * Although the Funds’ shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the year ended December 31, 2016. Market value per Share is determined at the close of the NYSE Arca and may be later than when the Funds’ NAV per Share is calculated. For financial reporting purposes, the Funds value transactions based upon the final closing price in their primary markets. Accordingly, the investment valuations in these financial statements may differ from those used in the calculation of certain of the Funds’ final creation/redemption NAV for the year ended December 31, 2016. Investment Valuation Short-term investments are valued at amortized cost which approximates fair value for daily NAV purposes. For financial reporting purposes, short-term investments are valued at their market price using information provided by a third-party pricing service or market quotations. In each of these situations, valuations are typically categorized as Level I in the fair value hierarchy. Derivatives ( e.g. non-exchange-traded Fair value pricing may require subjective determinations about the value of an investment. While the Funds’ policies are intended to result in a calculation of its respective Fund’s NAV that fairly reflects investment values as of the time of pricing, such Fund cannot ensure that fair values determined by the Sponsor or persons acting at their direction would accurately reflect the price that a Fund could obtain for an investment if it were to dispose of that investment as of the time of pricing (for instance, in a forced or distressed sale). The prices used by such Fund may differ from the value that would be realized if the investments were sold and the differences could be material to the financial statements. Fair Value of Financial Instruments The Funds disclose the fair value of their investments in a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The disclosure requirements establish a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of the Funds (observable inputs); and (2) the Funds’ own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the disclosure requirements 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 in different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest input level that is significant to the fair value measurement in its entirety. Fair value measurements also require additional disclosure when the volume and level of activity for the asset or liability have significantly decreased, as well as when circumstances indicate that a transaction is not orderly. The following table summarizes the valuation of investments at December 31, 2016 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total VIX Short-Term Futures ETF $ 147,991,233 $ (468,652 ) $ — $ — $ — $ 147,522,581 VIX Mid-Term 45,486,235 (1,288,245 ) — — — 44,197,990 Short VIX Short-Term Futures ETF 170,396,436 (10,309,611 ) — — — 160,086,825 Ultra VIX Short-Term Futures ETF 434,671,795 (7,972,237 ) — — — 426,699,558 UltraShort Bloomberg Crude Oil 205,694,385 (1,426,815 ) — — (12,206,881 ) 192,060,689 UltraShort Bloomberg Natural Gas 2,899,151 (482,031 ) — — — 2,417,120 UltraShort Gold 60,540,555 18,980 3,033,566 — — 63,593,101 UltraShort Silver 21,550,319 27,310 1,384,246 — — 22,961,875 Short Euro 13,164,828 132,900 — — — 13,297,728 UltraShort Australian Dollar 12,909,619 1,182,340 — — — 14,091,959 UltraShort Euro 337,375,787 — — 16,162,931 — 353,538,718 UltraShort Yen 257,102,313 — — 16,744,937 — 273,847,250 Ultra Bloomberg Crude Oil 885,050,007 5,537,165 — — 55,358,571 945,945,743 Ultra Bloomberg Natural Gas 36,183,648 2,536,720 — — — 38,720,368 Ultra Gold 95,356,621 (18,960 ) (4,431,107 ) — — 90,906,554 Ultra Silver 295,300,799 (27,360 ) (20,976,189 ) — — 274,297,250 Ultra Euro 11,891,831 — — (574,010 ) — 11,317,821 Ultra Yen 5,282,879 — — (342,076 ) — 4,940,803 Total Trust $ 3,038,848,441 $ (12,558,496 ) $ (20,989,484 ) $ 31,991,782 $ 43,151,690 $ 3,080,443,933 * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. At December 31, 2016, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. The Funds’ policy is to recognize transfers between valuation levels at the end of the reporting period. At December 31, 2016, there were no significant transfers in or out of Level I and Level II fair value measurements. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. The following table summarizes the valuation of investments at December 31, 2015 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total VIX Short-Term Futures ETF $ 96,073,659 $ (1,078,625 ) $ — $ — $ — $ 94,995,034 VIX Mid-Term 25,976,287 (344,360 ) — — — 25,631,927 Short VIX Short-Term Futures ETF 535,392,718 10,746,415 — — — 546,139,133 Ultra VIX Short-Term Futures ETF 438,357,849 11,894,466 — — — 450,252,315 UltraShort Bloomberg Crude Oil 79,692,642 2,464,513 — — 6,412,656 88,569,811 UltraShort Bloomberg Natural Gas 8,115,004 (2,471,164 ) — — — 5,643,840 UltraShort Gold 72,979,905 5,220 1,808,942 — — 74,794,067 UltraShort Silver 50,730,230 5,970 4,778,279 — — 55,514,479 Short Euro 15,153,211 243,438 — — — 15,396,649 UltraShort Australian Dollar 18,408,894 (420,270 ) — — — 17,988,624 UltraShort Euro 546,166,776 — — (28,710,336 ) — 517,456,440 UltraShort Yen 259,997,001 — — (13,895,452 ) — 246,101,549 Ultra Bloomberg Crude Oil 797,650,543 (17,929,314 ) — — (72,176,589 ) 707,544,640 Ultra Bloomberg Natural Gas 26,807,731 6,312,879 — — — 33,120,610 Ultra Gold 71,912,587 (5,200 ) (2,250,595 ) — — 69,656,792 Ultra Silver 238,899,626 (9,030 ) (22,561,101 ) — — 216,329,495 Ultra Euro 11,605,262 — — 604,920 — 12,210,182 Ultra Yen 5,069,491 — — 261,311 — 5,330,802 Total Trust** $ 3,298,989,416 $ 9,414,938 $ (18,224,475 ) $ (41,739,557 ) $ (65,763,933 ) $ 3,182,676,389 * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. ** Amounts exclude the activity of: ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016. At December 31, 2015, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. The Funds’ policy is to recognize transfers between valuation levels at the end of the reporting period. At December 31, 2015, there were no significant transfers in or out of Level I and Level II fair value measurements. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. Investment Transactions and Related Income Investment transactions are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized appreciation/depreciation on open contracts are reflected in the Statements of Financial Condition and changes in the unrealized appreciation/depreciation between periods are reflected in the Statements of Operations. Discounts on short-term securities purchased are amortized and reflected as Interest Income in the Statements of Operations. Brokerage Commissions and Fees Each Fund pays its respective brokerage commissions, including applicable exchange fees, National Futures Association (“NFA”) fees, give-up Federal Income Tax Each Fund is registered as a series of a Delaware statutory trust and is treated as a partnership for U.S. federal income tax purposes. Accordingly, no Fund expects to incur U.S. federal income tax liability; rather, each beneficial owner of a Fund’s Shares is required to take into account its allocable share of its Fund’s income, gain, loss, deductions and other items for its Fund’s taxable year ending with or within the beneficial owner’s taxable year. Management of the Funds has reviewed all open tax years and major jurisdictions ( i.e. on-going

Investments

Investments	12 Months Ended
	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Investments	NOTE 3 – INVESTMENTS Short-Term Investments The Funds may purchase U.S. Treasury Bills, agency securities, and other high-credit quality short-term fixed income or similar securities with original maturities of one year or less. A portion of these investments may be posted as collateral in connection with swap agreements and/or used as collateral for a Fund’s trading in futures and forward contracts. Accounting for Derivative Instruments In seeking to achieve each Fund’s investment objective, the Sponsor uses a mathematical approach to investing. Using this approach, the Sponsor determines the type, quantity and mix of investment positions, including derivative positions, which the Sponsor believes in combination, should produce returns consistent with a Fund’s objective. All open derivative positions at period end are reflected on each respective Fund’s Schedule of Investments. Certain Funds utilized a varying level of derivative instruments in conjunction with investment securities in seeking to meet their investment objective during the period. While the volume of open positions may vary on a daily basis as each Fund transacts derivatives contracts in order to achieve the appropriate exposure to meet its investment objective, the volume of these open positions relative to the net assets of each respective Fund at the date of this report is generally representative of open positions throughout the reporting period. Following is a description of the derivative instruments used by the Funds during the reporting period, including the primary underlying risk exposures related to each instrument type. Futures Contracts The Funds enter into futures contracts to gain exposure to changes in the value of, or as a substitute for investing directly in (or shorting), an underlying index, currency or commodity. A futures contract obligates the seller to deliver (and the purchaser to accept) the future delivery of a specified quantity and type of asset at a specified time and place. The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity, if applicable, 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, or by cash settlement at expiration of contract. Upon entering into a futures contract, each Fund is required to deposit and maintain as collateral at least such initial margin as required by the exchange on which the transaction is affected. The initial margin is segregated as cash and/or securities balances with brokers for futures contracts, as disclosed in the Statements of Financial Condition, and is restricted as to its use. The Funds that enter into futures contracts maintain collateral at the broker in the form of cash and/or securities. Pursuant to the futures contract, each Fund generally agrees to receive from or pay to the broker(s) an amount of cash equal to the daily fluctuation in value of the futures contract. Such receipts or payments are known as variation margin and are recorded by each Fund as unrealized gains or losses. Each Fund will realize a gain or loss upon closing of a futures transaction. Futures contracts involve, to varying degrees, elements of market risk (specifically commodity price risk or equity market volatility 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 each Fund has in the particular classes of instruments. Additional risks associated with the use of futures contracts are imperfect correlation between movements in the price of the futures contracts and the market value of the underlying index or commodity and the possibility of an illiquid market for a futures contract. With futures contracts, there is minimal but some counterparty risk to the Funds since futures contracts are exchange-traded and the exchange’s clearinghouse, as counterparty to all exchange-traded futures contracts, guarantees the futures contracts against default. Many futures exchanges and boards of trade limit the amount of fluctuation permitted in futures contract prices during a single trading day. Once the daily limit has been reached in a particular contract, no trades may be made that day at a price beyond that limit or trading may be suspended for specified times during the trading day. Futures contracts prices could move to the limit for several consecutive trading days with little or no trading, thereby preventing prompt liquidation of futures positions and potentially subjecting a Fund to substantial losses. If trading is not possible, or if a Fund determines not to close a futures position in anticipation of adverse price movements, the Fund will be required to make daily cash payments of variation margin. The risk the Fund will be unable to close out a futures position will be minimized by entering into such transactions on a national exchange with an active and liquid secondary market. Swap Agreements Certain of the Funds enter into swap agreements for purposes of pursuing their investment objectives or as a substitute for investing directly in (or shorting) an underlying index, currency or commodity, or to create an economic hedge against a position. Swap agreements are two-party over-the-counter Generally, swap agreements entered into by the Funds calculate and settle the obligations of the parties to the agreement on a “net basis” with a single payment. Consequently, each Fund’s current obligations (or rights) under a swap agreement will generally be equal only to the net amount to be paid or received under the agreement based on the relative values of such obligations (or rights) (the “net amount”). In a typical swap agreement entered into by a Matching VIX Fund or an Ultra Fund, the Matching VIX Fund or Ultra Fund would be entitled to settlement payments in the event the level of the benchmark increases and would be required to make payments to the swap counterparties in the event the level of the benchmark decreases, adjusted for any transaction costs or trading spreads on the notional amount the Funds may pay. In a typical swap agreement entered into by a Short Fund or an UltraShort Fund, the Short Fund or UltraShort Fund would be required to make payments to the swap counterparties in the event the level of the benchmark increases and would be entitled to settlement payments in the event the level of the benchmark decreases, adjusted for any transaction costs or trading spreads on the notional amount the Funds may pay. The net amount of the excess, if any, of each Fund’s obligations over its entitlements with respect to each uncleared swap agreement is accrued on a daily basis and an amount of cash and/or securities having an aggregate value at least equal to such accrued excess is maintained for the benefit of the counterparty in a segregated account by the Funds’ Custodian. The net amount of the excess, if any, of each Fund’s entitlements over its obligations with respect to each uncleared swap agreement is accrued on a daily basis and an amount of cash and/or securities having an aggregate value at least equal to such accrued excess is maintained for the benefit of the Fund in a segregated account by the Fund’s Custodian. Until a swap agreement is settled in cash, the gain or loss on the notional amount less any transaction costs or trading spreads payable by each Fund on the notional amount are recorded as “unrealized appreciation or depreciation on swap agreements” and, when cash is exchanged, the gain or loss realized is recorded as “realized gains or losses on swap agreements.” Swap agreements are generally valued at the last settled price of the benchmark referenced asset. The Trust, on behalf of a Fund, may enter into agreements with certain counterparties for derivative transactions. These agreements contain various conditions, events of default, termination events, covenants and representations. The triggering of certain events or the default on certain terms of the agreement could allow a party to terminate a transaction under the agreement and request immediate payment in an amount equal to the net positions owed the party under the agreement. This could cause a Fund to have to enter into a new transaction with the same counterparty, enter into a transaction with a different counterparty or seek to achieve its investment objective through any number of different investments or investment techniques. Swap agreements involve, to varying degrees, elements of market risk and exposure to loss in excess of the unrealized gain/loss reflected. The notional amounts reflect the extent of the total investment exposure each Fund has under the swap agreement, which may exceed the NAV of each Fund. Additional risks associated with the use of swap agreements are imperfect correlations between movements in the notional amount and the price of the underlying reference index and the inability of counterparties to perform. Each Fund bears the risk of loss of the amount expected to be received under a swap agreement in the event of the default or bankruptcy of a swap agreement counterparty. A Fund will typically enter into swap agreements only with major global financial institutions. The creditworthiness of each of the firms that is a party to a swap agreement is monitored by the Sponsor. The Sponsor may use various techniques to minimize credit risk including early termination and payment, using different counterparties, limiting the net amount due from any individual counterparty and generally requiring collateral to be posted by the counterparty in an amount approximately equal to that owed to the Funds. All of the outstanding swap agreements at December 30, 2016 contractually terminate within one month but may be terminated without penalty by either party daily. Upon termination, the Fund is entitled to pay or receive the “unrealized appreciation or depreciation” amount. The Funds, as applicable, collateralize swap agreements by segregating or designating cash and/or certain securities as indicated on the Statements of Financial Condition or Schedules of Investments. As noted above, collateral posted in connection with uncleared derivative transactions is held for the benefit of the counterparty in a segregated tri-party non-payment The Funds remain subject to credit risk with respect to the amount they expect to receive from counterparties. However, the Funds have sought to mitigate these risks in connection with uncleared swaps by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, in an amount approximately equal to what the counterparty owes the Fund, subject to certain minimum thresholds. In the event of the bankruptcy of a counterparty, the Fund will have direct access to the collateral received from the counterparty, generally as of the day prior to the bankruptcy, because there is a one day time lag between the Fund’s request for collateral and the delivery of such collateral. To the extent any such collateral is insufficient, the Funds will be exposed to counterparty risk as described above, including the possible delays in recovering amounts as a result of bankruptcy proceedings. As of December 31, 2016, the collateral posted by counterparties consisted of cash and/or U.S. Treasury securities. The counterparty/credit risk for cleared derivative transactions is generally lower than for uncleared OTC derivatives since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing organization for performance of financial obligations. In addition, cleared derivative transactions benefit from daily marking-to-market Forward Contracts Certain of the Funds enter into forward contracts for purposes of pursuing their investment objectives and as a substitute for investing directly in (or shorting) commodities and/or currencies. A forward contract is an agreement between two parties to purchase or sell a specified quantity of an asset at or before a specified date in the future at a specified price. Forward contracts are typically traded in OTC markets and all details of the contract are negotiated between the counterparties to the agreement. Accordingly, the forward contracts are valued by reference to the contracts traded in the OTC markets. The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity or currency, establishing an opposite position in the contract and recognizing the profit or loss on both positions simultaneously on the delivery date or, in some instances, paying a cash settlement before the designated date of delivery. The forward contracts are adjusted by the daily fluctuation of the underlying commodity or currency and any gains or losses are recorded for financial statement purposes as unrealized gains or losses until the contract settlement date. Forward contracts have traditionally not been cleared or guaranteed by a third party. As a result of the Dodd-Frank Act, the CFTC now regulates non-deliverable non-deliverable non-deliverable The Funds may collateralize uncleared forward commodity contracts by segregating or designating cash and/or certain securities as indicated on their Statements of Financial Condition or Schedules of Investments. Such collateral is held for the benefit of the counterparty in a segregated tri-party non-payment The Funds remain subject to credit risk with respect to the amount they expect to receive from counterparties. However, the Funds have sought to mitigate these risks by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, in an amount approximately equal to what the counterparty owes the Fund, subject to minimum thresholds. In the event of the bankruptcy of counterparty, the Fund will have direct access to the collateral received from the counterparty, generally as of the day prior to the bankruptcy, because there is a one day time lag between the Fund’s request for collateral and the delivery of such collateral. To the extent any such collateral is insufficient, the Fund will be exposed to counterparty risk as described above, including the possible delays in recovering amounts as a result of bankruptcy proceedings. As of December 31, 2016, the collateral posted by counterparties consisted of cash and/or U.S. Treasury securities. Participants in trading foreign exchange forward contracts often do not require margin deposits, but rely upon internal credit limitations and their judgments regarding the creditworthiness of their counterparties. In recent years, however, many OTC market participants in foreign exchange trading have begun to require their counterparties to post margin. A Fund will typically enter into forward contracts only with major global financial institutions. The creditworthiness of each of the firms that is a party to a forward contract is monitored by the Sponsor. The counterparty/credit risk for cleared derivative transactions is generally lower than for uncleared OTC derivatives since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing organization for performance of financial obligations. In addition, cleared derivative transactions benefit from daily marking-to-market The following tables indicate the location of derivative related items on the Statement of Financial Condition as well as the effect of derivative instruments on the Statement of Operations during the reporting period. Fair Value of Derivative Instruments as of December 31, 2016 Assets Derivatives Liability Derivatives Derivatives not accounted for as hedging instruments Statements of Financial Condition Location Fund Unrealized Appreciation Statements of Financial Condition Location Fund Unrealized Depreciation VIX Futures Contracts Receivables on open futures contracts ProShares VIX Short-Term Futures ETF $ 2,273,874 * Payable on open futures contracts ProShares VIX Short-Term Futures ETF $ 2,742,526 * ProShares VIX Mid- 68,375 * ProShares VIX Mid-Term 1,356,620 * ProShares Ultra VIX Short-Term 13,594,875 * ProShares Short VIX Short-Term 10,309,611 * ProShares Ultra VIX Short-Term Futures ETF 21,567,112 * Commodities Contracts Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements ProShares UltraShort Gold 3,052,546 * Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil 13,633,696 * ProShares UltraShort Silver 1,411,556 * ProShares UltraShort Bloomberg Natural Gas 482,031 * ProShares Ultra Bloomberg Crude Oil 60,895,736 * ProShares Ultra Gold 4,450,067 * ProShares Ultra Bloomberg Natural Gas 2,536,720 * ProShares Ultra Silver 21,003,549 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts ProShares Short Euro 132,900 * Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts ProShares UltraShort Euro 356,139 ProShares UltraShort Australian Dollar 1,182,340 * ProShares UltraShort Yen 125,420 ProShares UltraShort Euro 16,519,070 ProShares Ultra Euro 576,558 ProShares UltraShort Yen 16,870,357 ProShares Ultra Yen 342,455 ProShares Ultra Euro 2,548 ProShares Ultra Yen 379 Total Trust $ 118,541,276 * Total Trust $ 76,945,784 * * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. Fair Value of Derivative Instruments as of December 31, 2015 Assets Derivatives Liability Derivatives Derivatives not accounted for as hedging instruments Statements of Financial Condition Location Fund Unrealized Statements of Financial Condition Location Fund Unrealized VIX Futures Contracts Receivables on open futures contracts ProShares VIX Mid- $ 10,005 * Payable on open futures contracts ProShares VIX Short- Term Futures ETF $ 1,078,625 * ProShares Short VIX Short-Term Futures ETF 10,805,245 * ProShares VIX Mid-Term 354,365 * ProShares Ultra VIX Short-Term Futures ETF 11,894,466 * ProShares Short VIX Short-Term Futures ETF 58,830 * Commodities Contracts Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil 8,877,169 * Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Natural Gas 2,471,164 * ProShares Ultra Bloomberg Natural Gas 6,312,879 * ProShares Ultra Bloomberg Crude Oil 90,105,903 * ProShares UltraShort Gold 1,814,162 * ProShares Ultra Gold 2,255,795 * ProShares UltraShort Silver 4,784,249 * ProShares Ultra Silver 22,570,131 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts ProShares Short Euro 243,438 * Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts ProShares UltraShort Australian Dollar 420,270 * ProShares UltraShort Yen 933,727 ProShares UltraShort Euro 28,710,336 ProShares Ultra Euro 604,920 ProShares UltraShort Yen 14,829,179 ProShares Ultra Yen 267,014 ProShares Ultra Yen 5,703 Total Trust** $ 46,547,274 * Total Trust** $ 162,860,301 * * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. ** Amounts exclude the activity of: ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016. The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2016 Derivatives not accounted for as hedging instruments Location of Gain (Loss) on Derivatives Fund Realized Gain (Loss) on Derivatives Change in Unrealized Recognized in VIX Futures Contracts Net realized gain (loss) on futures contracts/ changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term Futures ETF $ (195,475,791 ) $ 609,973 ProShares VIX Mid-Term (11,085,506 ) (943,885 ) ProShares Short VIX Short-Term Futures ETF 440,391,389 (21,056,026 ) ProShares Ultra VIX Short-Term Futures ETF (1,567,340,688 ) (19,866,703 ) Commodity Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil (67,752,164 ) (22,510,865 ) ProShares UltraShort Bloomberg Natural Gas 586,860 1,989,133 ProShares UltraShort Gold (12,240,751 ) 1,238,384 ProShares UltraShort Silver (17,554,714 ) (3,372,693 ) ProShares Ultra Bloomberg Crude Oil 74,061,040 151,001,639 ProShares Ultra Bloomberg Natural Gas 17,571,809 (3,776,159 ) ProShares Ultra Gold 5,816,565 (2,194,272 ) ProShares Ultra Silver 62,342,441 1,566,582 Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts ProShares Short Euro 663,774 (110,538 ) ProShares UltraShort Australian Dollar (2,787,204 ) 1,602,610 ProShares UltraShort Euro (25,711,518 ) 44,873,267 ProShares UltraShort Yen (22,220,271 ) 30,640,389 ProShares Ultra Euro 138,959 (1,178,930 ) ProShares Ultra Yen 717,086 (603,387 ) Total Trust $ (1,319,878,684 ) $ 157,908,519 The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2015 Derivatives not accounted for as Location of Gain or (Loss) on Derivatives Recognized in Income Fund Realized Gain or (Loss) on Recognized in Income Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in VIX Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term $ (19,408,543 ) $ (7,343,245 ) ProShares VIX Mid-Term (3,335,936 ) (605,025 ) ProShares Short VIX Short-Term Futures ETF 69,793,028 27,098,564 ProShares Ultra VIX Short-Term Futures ETF (392,174,228 ) (27,690,787 ) Commodity Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil 91,670,324 (33,947,511 ) ProShares UltraShort Bloomberg Natural Gas 15,212,804 (6,412,629 ) ProShares UltraShort Gold 12,707,635 4,101,460 ProShares UltraShort Silver 10,759,545 4,187,736 ProShares Ultra Bloomberg Crude Oil (896,177,096 ) 32,549,981 ProShares Ultra Bloomberg Natural Gas (100,776,817 ) 41,202,162 ProShares Ultra Gold (18,605,815 ) (4,311,529 ) ProShares Ultra Silver (78,309,309 ) (10,173,451 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts ProShares Short Euro 1,559,425 (141,893 ) ProShares UltraShort Australian Dollar 4,330,463 (1,163,751 ) ProShares UltraShort Euro 131,651,572 (45,473,330 ) ProShares UltraShort Yen 8,809,464 (12,316,677 ) ProShares Ultra Euro (1,982,208 ) 708,291 ProShares Ultra Yen (472,913 ) 276,556 Total Trust* $ (1,164,748,605 ) $ (39,455,078 ) * Amounts exclude the activity of: ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016. The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2014 Derivatives not accounted for as hedging instruments Location of Gain or (Loss) on Derivatives Recognized in Income Fund Realized Gain or (Loss) on Recognized in Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income VIX Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term $ (694,347 ) $ 22,917,306 ProShares VIX Mid-Term (14,378,810 ) 5,157,354 ProShares Short VIX Short-Term 76,925,998 (24,469,104 ) ProShares Ultra VIX Short-Term (139,412,525 ) 63,595,164 Commodity Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil 99,327,097 46,390,353 ProShares UltraShort Bloomberg Natural Gas 8,791,719 2,899,165 ProShares UltraShort Gold (5,316,482 ) (7,934,871 ) ProShares UltraShort Silver 15,114,883 2,810,170 ProShares Ultra Bloomberg Crude Oil (243,325,957 ) (125,240,438 ) ProShares Ultra Bloomberg Natural Gas (6,464,796 ) (31,232,744 ) ProShares Ultra Gold (9,674,333 ) 8,883,268 ProShares Ultra Silver (155,551,420 ) (9,889,600 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts ProShares Short Euro 1,593,048 418,562 ProShares UltraShort Australian Dollar 2,296,216 (174,124 ) ProShares UltraShort Euro 83,678,955 30,511,501 ProShares UltraShort Yen 127,846,225 (30,965,459 ) ProShares Ultra Euro (420,533 ) (204,333 ) ProShares Ultra Yen (540,398 ) 144,064 Total Trust* $ (160,205,460 ) $ (46,383,766 ) * Amounts exclude the activity of ProShares Ultra Australian Dollar which liquidated on June 29, 2015, ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016. Offsetting Assets and Liabilities Each Fund is subject to master netting agreements or similar arrangements that allow for amounts owed between each Fund and the counterparty to be netted upon an early termination. The party that has the larger payable pays the excess of the larger amount over the smaller amount to the other party. The master netting agreements or similar arrangements do not apply to amounts owed to/from different counterparties. As described above, the Funds utilize derivative instruments to achieve their investment objective during the year. The amounts shown in the Statements of Financial Condition do not take into consideration the effects of legally enforceable master netting agreements or similar arrangements. For financial reporting purposes, the Funds do not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statements of Financial Condition. The following table presents each Fund’s derivatives by investment type and by counterparty net of amounts available for offset under a master netting agreement and the related collateral received or pledged by the Funds as of December 31, 2016: Fair Values of Derivative Instruments as of December 31, 2016 Assets Liabilities Gross Gross Net Amounts of Gross Gross Net Amounts of ProShares UltraShort Bloomberg Crude Oil Swap agreements $ — $ — $ — $ 12,206,881 $ — $ 12,206,881 ProShares UltraShort Gold Forward agreements 3,033,566 — 3,033,566 — — — ProShares UltraShort Silver Forward agreements 1,384,246 — 1,384,246 — — — ProShares UltraShort Euro Foreign currency forward contracts 16,519,070 — 16,519,070 356,139 — 356,139 ProShares UltraShort Yen Foreign currency forward contracts 16,870,357 — 16,870,357 125,420 — 125,420 ProShares Ultra Bloomberg Crude Oil Swap agreements 55,358,571 — 55,358,571 — — — ProShares Ultra Gold Forward agreements — — — 4,431,107 — 4,431,107 ProShares Ultra Silver Forward agreements — — — 20,976,189 — 20,976,189 ProShares Ultra Euro Foreign currency forward contracts 2,548 — 2,548 576,558 — 576,558 ProShares Ultra Yen Foreign currency forward contracts 379 — 379 342,455 — 342,455 Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2016. These amounts may be collateralized by cash or financial instruments, segregated for the benefit of the Funds or the counterparties, depending on whether the related contracts are in an appreciated or depreciated position at period end. Amounts shown in the column labeled “Net Amount” represent the uncollateralized portions of these amounts at period end. These amounts may be un-collateralized Gross Amounts Not Offset in the Statements of Financial Condition as of December 31, 2016 Amounts of Recognized Assets / (Liabilities) Statements of Financial Instruments for the Benefit of (the Funds) / the Counterparties Cash Collateral for the Benefit of (the Funds) / the Net Amount ProShares UltraShort Bloomberg Crude Oil Citibank N.A. $ (4,742,191 ) $ 4,742,191 $ — $ — Goldman Sachs International (3,061,395 ) 3,061,395 — — Societe Generale S.A. (1,050,699 ) 1,050,699 — — UBS AG (3,352,596 ) 3,352,596 — — ProShares UltraShort Gold Citibank N.A. 1,147,811 — — 1,147,811 Goldman Sachs International 881,454 (874,948 ) — 6,506 Societe Generale S.A. 393,006 (393,006 ) — — UBS AG 611,295 — (611,295 ) — ProShares UltraShort Silver Citibank N.A. 610,478 — — 610,478 Goldman Sachs International 323,829 (323,829 ) — — Societe Generale S.A. 86,543 (86,543 ) — — UBS AG 363,396 — (363,396 ) — ProShares UltraShort Euro Goldman Sachs International 8,109,067 (8,109,067 ) — — UBS AG 8,053,864 — (8,053,864 ) — ProShares UltraShort Yen Goldman Sachs International 8,256,779 (7,771,819 ) — 484,960 UBS AG 8,488,158 — (7,980,000 ) 508,158 ProShares Ultra Bloomberg Crude Oil Citibank N.A. 18,427,009 — — 18,427,009 Goldman Sachs International 14,016,906 (14,016,906 ) — — Societe Generale S.A. 8,661,821 (8,661,821 ) — — UBS AG 14,252,835 — (14,252,835 ) — ProShares Ultra Gold Citibank N.A. (1,464,982 ) 1,464,982 — — Goldman Sachs International (1,112,916 ) 1,112,916 — — Societe Generale S.A. (643,587 ) 643,587 — — UBS AG (1,209,622 ) 1,209,622 — — ProShares Ultra Silver Citibank N.A. (6,946,009 ) 6,946,009 — — Goldman Sachs International (5,869,092 ) 5,869,092 — — Societe Generale S.A. (2,532,729 ) 2,532,729 — — UBS AG (5,628,359 ) 5,628,359 — — ProShares Ultra Euro Goldman Sachs International (239,256 ) 239,256 — — UBS AG (334,754 ) 334,754 — — ProShares Ultra Yen Goldman Sachs International (219,736 ) 219,736 — — UBS AG (122,340 ) 122,340 — — The following table presents each Fund’s derivatives by investment type and by counterparty net of amounts available for offset under a master netting agreement and the related collateral received or pledged by the Funds as of December 31, 2015: Fair Values of Derivative Instruments as of December 31, 2015 Assets Liabilities Gross Gross the Statements Net Amounts of Assets Gross Gross Statements Net Amounts of ProShares UltraShort Bloomberg Crude Oil Swap agreements $ 6,412,656 $ — $ 6,412,656 $ — $ — $ — ProShares UltraShort Gold Forward agreements 1,808,942 — 1,808,942 — — — ProShares UltraShort Silver Forward agreements 4,778,279 — 4,778,279 — — — ProShares UltraShort Euro Foreign currency forward contracts — — — 28,710,336 — 28,710,336 ProShares UltraShort Yen Foreign currency forward contracts 933,727 — 933,727 14,829,179 — 14,829,179 ProShares Ultra Bloomberg Crude Oil Swap agreements — — — 72,176,589 — 72,176,589 ProShares Ultra Gold Forward agreements — — — 2,250,595 — 2,250,595 ProShares Ultra Silver Forward agreements — — — 22,561,101 — 22,561,101 ProShares Ultra Euro Foreign currency forward contracts 604,920 — 604,920 — — — ProShares Ultra Yen Foreign currency forward contracts 267,014 — 267,014 5,703 — 5,703 Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2015. These amounts may be collateralized by cash or financial instruments, segregated for the benefit of the

Agreements

Agreements	12 Months Ended
	Dec. 31, 2016
Text Block [Abstract]
Agreements	NOTE 4 – AGREEMENTS Management Fee Each Leveraged Fund, the Short Euro Fund and each Geared VIX Fund pays the Sponsor a Management Fee, monthly in arrears, in an amount equal to 0.95% per annum of its average daily NAV of such Fund. Each Matching VIX Fund pays the Sponsor a Management Fee, monthly in arrears, in an amount equal to 0.85% per annum of its average daily NAV of such Fund. The Sponsor did not and will not charge the Management Fee in the first year of operation of each Fund in an amount equal to the offering costs. The Sponsor reimbursed each Fund, to the extent that its offering costs exceed the Management Fee, for the first year of operations. The Management Fee is paid in consideration of the Sponsor’s services as commodity pool operator, and for managing the business and affairs of the Funds. From the Management Fee, the Sponsor pays all of the routine operational, administrative and other ordinary expenses of each Fund, generally as determined by the Sponsor, including but not limited to the Administrator, Custodian, Distributor, ProFunds Distributors, Inc. (“PDI”), an affiliated broker-dealer of the Sponsor, Transfer Agent, accounting and auditing fees and expenses, any index licensors for the Funds, and the normal and expected expenses incurred in connection with the continuous offering of Shares of each Fund after the commencement of its trading operations, including, but not limited to, expenses such as tax preparation expenses, legal fees not in excess of $100,000 per annum, ongoing SEC registration fees not exceeding 0.021% per annum of the NAV of a Fund and Financial Industry Regulatory Authority (“FINRA”) filing fees, individual Schedule K-1 Non-Recurring Each Fund pays all its non-recurring Non-recurring The Administrator The Sponsor and the Trust, for itself and on behalf of each Fund, has appointed Brown Brothers Harriman & Co. (“BBH&Co.”) as the Administrator of the Funds, and the Sponsor, and the Trust, on its own behalf and on behalf of each Fund, and BBH&Co. have entered into an Administrative Agency Agreement (the “Administration Agreement”) in connection therewith. Pursuant to the terms of the Administration Agreement and under the supervision and direction of the Sponsor and the Trust, BBH&Co. prepares and files certain regulatory filings on behalf of the Funds. BBH&Co. may also perform other services for the Funds pursuant to the Administration Agreement as mutually agreed upon by the Sponsor, the Trust and BBH&Co. from time to time. Pursuant to the terms of the Administration Agreement, BBH&Co. also serves as the Transfer Agent of the Funds. The Administrator’s fees are paid on behalf of the Funds by the Sponsor. The Custodian BBH&Co. serves as the Custodian of the Funds, and the Trust, on its own behalf and on behalf of each Fund, and BBH&Co. have entered into a Custodian Agreement in connection therewith. Pursuant to the terms of the Custodian Agreement, BBH&Co. is responsible for the holding and safekeeping of assets delivered to it by the Funds, and performing various administrative duties in accordance with instructions delivered to BBH&Co. by the Funds. The Custodian’s fees are paid on behalf of the Funds by the Sponsor. The Distributor SEI Investments Distribution Co. (“SEI”), serves as Distributor of the Funds and assists the Sponsor and the Administrator with certain functions and duties relating to distribution and marketing, including taking creation and redemption orders, consulting with the marketing staff of the Sponsor and its affiliates with respect to compliance with the requirements of FINRA and/or the NFA in connection with marketing efforts, and reviewing and filing of marketing materials with FINRA and/or the NFA. SEI retains all marketing materials separately for each Fund, at c/o SEI, One Freedom Valley Drive, Oaks, PA 19456. The Sponsor, on behalf of each Fund, has entered into a Distribution Services Agreement with SEI. The Sponsor pays SEI for performing its duties on behalf of the Funds.

Offering Costs

Offering Costs	12 Months Ended
	Dec. 31, 2016
Text Block [Abstract]
Offering Costs	NOTE 5 – OFFERING COSTS Offering costs will be amortized by the Funds over a twelve month period on a straight-line basis beginning once the fund commences operations. The Sponsor will not charge its Management Fee in the first year of operations of a Fund in an amount equal to the offering costs. Normal and expected expenses incurred in connection with the continuous offering of Shares of a Fund after the commencement of its trading operations will be paid by the Sponsor.

Creation and Redemption of Crea

Creation and Redemption of Creation Units	12 Months Ended
	Dec. 31, 2016
Text Block [Abstract]
Creation and Redemption of Creation Units	NOTE 6 – CREATION AND REDEMPTION OF CREATION UNITS Each Fund issues and redeems shares from time to time, but only in one or more Creation Units. A Creation Unit is a block of 50,000 Shares of a Geared Fund and 25,000 Shares of a Matching VIX Fund. Creation Units may be created or redeemed only by Authorized Participants. As a result of the Share splits and reverse Share splits as described in Note 1, certain redemptions as disclosed in the Statements of Changes in Shareholders’ Equity reflect payment of fractional share balances on beneficial shareholder accounts. Except when aggregated in Creation Units, the Shares are not redeemable securities. Retail investors, therefore, generally will not be able to purchase or redeem Shares directly from or with a Fund. Rather, most retail investors will purchase or sell Shares in the secondary market with the assistance of a broker. Thus, some of the information contained in these Notes to Financial Statements—such as references to the Transaction Fees imposed on purchases and redemptions—is not relevant to retail investors. Transaction Fees on Creation and Redemption Transactions The manner by which Creation Units are purchased or redeemed is dictated by the terms of the Authorized Participant Agreement and Authorized Participant Handbook. By placing a purchase order, an Authorized Participant agrees to: (1) deposit cash with the Custodian; and (2) if permitted by the Sponsor in its sole discretion, enter into or arrange for an exchange of futures contract for related position or block trade whereby the Authorized Participant would also transfer to such Fund a number and type of exchange-traded futures contracts at or near the closing settlement price for such contracts on the purchase order date. Authorized Participants may pay a fixed transaction fee of up to $500 in connection with each order to create or redeem a Creation Unit in order to compensate BBH&Co., as the Administrator, the Custodian and the Transfer Agent of each Fund and its Shares, for services in processing the creation and redemption of Creation Units and to offset the costs of increasing or decreasing derivative positions. Authorized Participants also may pay a variable transaction fee to the Fund of up to 0.10% (and a variable transaction fee to the Matching VIX Funds of 0.05%) of the value of the Creation Unit that is purchased or redeemed unless the transaction fee is waived or otherwise adjusted by the Sponsor. The Sponsor provides such Authorized Participant with prompt notice in advance of any such waiver or adjustment of the transaction fee. Authorized Participants may sell the Shares included in the Creation Units they purchase from the Funds to other investors in the secondary market. Transaction fees for the years ended December 31, 2016, 2015 and 2014 which are included in the Addition and/or Redemption of Shares on the Statements of Changes in Shareholders’ Equity, were as follows: Fund Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 VIX Short-Term Futures ETF $ 229,699 $ 105,024 $ 72,020 VIX Mid-Term 24,056 8,521 8,927 Short VIX Short-Term Futures ETF 801,564 342,734 218,121 Ultra VIX Short-Term Futures ETF 1,822,247 1,391,292 734,298 UltraShort Bloomberg Crude Oil 398,027 382,054 257,458 UltraShort Bloomberg Natural Gas 8,989 8,853 26,053 UltraShort Gold 29,854 11,024 32,473 UltraShort Silver 16,729 39,354 48,832 Short Euro — — — UltraShort Australian Dollar — — — UltraShort Euro — — — UltraShort Yen — — — Ultra Bloomberg Crude Oil 504,533 847,422 299,493 Ultra Bloomberg Natural Gas 9,175 13,939 30,073 Ultra Gold 14,138 4,218 12,088 Ultra Silver 47,414 38,848 65,208 Ultra Euro — — — Ultra Yen — — — Total Trust* $ 3,906,425 $ 3,193,283 $ 1,805,044 * Amounts exclude the activity of ProShares Ultra Australian Dollar which liquidated on June 29, 2015, ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016.

Financial Highlights

Financial Highlights	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Financial Highlights	NOTE 7 – FINANCIAL HIGHLIGHTS Selected data for a Share outstanding throughout the year ended December 31, 2016: For the Year Ended December 31, 2016 Per Share Operating Performance VIX Short- Term Futures VIX Mid- Term Futures ETF Short VIX Short-Term Ultra VIX UltraShort UltraShort Net asset value, at December 31, 2015 $ 66.2109 $ 53.9626 $ 50.8150 $ 702.1025 $ 66.6009 $ 46.5314 Net investment income (loss) (0.2754 ) (0.3333 ) (0.6090 ) (1.9193 ) (0.3600 ) (0.6812 ) Net realized and unrealized gain (loss)# (44.7209 ) (11.4932 ) 41.0242 (656.7016 ) (34.5434 ) (22.7492 ) Change in net asset value from operations (44.9963 ) (11.8265 ) 40.4152 (658.6209 ) (34.9034 ) (23.4304 ) Net asset value, at December 31, 2016 $ 21.2146 $ 42.1361 $ 91.2302 $ 43.4816 $ 31.6975 $ 23.1010 Market value per share, at December 31, 2015† $ 66.65 $ 53.99 $ 50.45 $ 708.75 $ 66.82 $ 46.55 Market value per share, at December 31, 2016† $ 21.26 $ 42.34 $ 90.98 $ 43.75 $ 31.65 $ 23.05 Total Return, at net asset value (68.0 )% (21.9 )% 79.5 % (93.8 )% (52.4 )% (50.4 )% Total Return, at market value (68.1 )% (21.6 )% 80.3 % (93.8 )% (52.6 )% (50.5 )% Ratios to Average Net Assets Expense ratio 0.99 % 0.93 % 1.39 % 1.57 % 1.03 % 1.65 % Expense ratio, excluding brokerage commissions 0.85 % 0.85 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.75 )% (0.68 )% (1.15 )% (1.32 )% (0.76 )% (1.43 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2016 Per Share Operating Performance UltraShort Gold UltraShort Short Euro UltraShort UltraShort Euro UltraShort Yen Net asset value, at December 31, 2015 $ 115.8799 $ 64.5783 $ 43.7767 $ 58.4582 $ 25.5406 $ 87.9389 Net investment income (loss) (0.5542 ) (0.2641 ) (0.3268 ) (0.4268 ) (0.1703 ) (0.4974 ) Net realized and unrealized gain (loss)# (23.9976 ) (27.0070 ) 1.6075 (2.6532 ) 1.7144 (7.1984 ) Change in net asset value from operations (24.5518 ) (27.2711 ) 1.2807 (3.0800 ) 1.5441 (7.6958 ) Net asset value, at December 31, 2016 $ 91.3281 $ 37.3072 $ 45.0574 $ 55.3782 $ 27.0847 $ 80.2431 Market value per share, at December 31, 2015† $ 115.83 $ 64.55 $ 43.74 $ 58.15 $ 25.53 $ 87.89 Market value per share, at December 31, 2016† $ 90.54 $ 38.76 $ 45.12 $ 55.24 $ 27.08 $ 80.25 Total Return, at net asset value (21.2 )% (42.2 )% 2.9 % (5.3 )% 6.0 % (8.8 )% Total Return, at market value (21.8 )% (40.0 )% 3.2 % (5.0 )% 6.1 % (8.7 )% Ratios to Average Net Assets Expense ratio 0.95 % 0.95 % 0.97 % 1.03 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.70 )% (0.70 )% (0.76 )% (0.79 )% (0.70 )% (0.71 )% # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2016 Per Share Operating Performance Ultra Bloomberg Ultra Bloomberg Ultra Gold Ultra Silver Ultra Euro Ultra Yen Net asset value, at December 31, 2015 $ 25.1548 $ 18.5698 $ 29.7295 $ 27.0638 $ 15.5107 $ 54.7527 Net investment income (loss) (0.1534 ) (0.1579 ) (0.2751 ) (0.2717 ) (0.1119 ) (0.4586 ) Net realized and unrealized gain (loss)# (1.6662 ) 0.4364 3.4482 6.6499 (1.3816 ) 1.1321 Change in net asset value from operations (1.8196 ) 0.2785 3.1731 6.3782 (1.4935 ) 0.6735 Net asset value, at December 31, 2016 $ 23.3352 $ 18.8483 $ 32.9026 $ 33.4420 $ 14.0172 $ 55.4262 Market value per share, at December 31, 2015† $ 25.08 $ 18.48 $ 29.73 $ 27.08 $ 15.51 $ 54.70 Market value per share, at December 31, 2016† $ 23.36 $ 18.96 $ 33.20 $ 32.09 $ 14.09 $ 55.52 Total Return, at net asset value (7.2 )% 1.5 % 10.7 % 23.6 % (9.6 )% 1.2 % Total Return, at market value (6.9 )% 2.6 % 11.7 % 18.5 % (9.2 )% 1.5 % Ratios to Average Net Assets Expense ratio 1.01 % 1.34 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.76 )% (1.12 )% (0.69 )% (0.69 )% (0.71 )% (0.69 )% ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. Selected data for a Share outstanding throughout the year ended December 31, 2015: For the Year Ended December 31, 2015 Per Share Operating Performance VIX Short- Term Futures VIX Mid- Term Futures Short VIX Ultra VIX UltraShort UltraShort Net asset value, at December 31, 2014 $ 104.6604 $ 63.6020 $ 61.4004 $ 3,136.4730 $ 38.9895 $ 27.9859 Net investment income (loss) (0.6622 ) (0.5053 ) (0.8162 ) (18.0602 ) (0.3924 ) (0.4438 ) Net realized and unrealized gain (loss)# (37.7873 ) (9.1341 ) (9.7692 ) (2,416.3103 ) 28.0038 18.9893 Change in net asset value from operations (38.4495 ) (9.6394 ) (10.5854 ) (2,434.3705 ) 27.6114 18.5455 Net asset value, at December 31, 2015 $ 66.2109 $ 53.9626 $ 50.8150 $ 702.1025 $ 66.6009 $ 46.5314 Market value per share, at December 31, 2014† $ 104.95 $ 63.89 $ 61.16 $ 3,143.75 $ 38.26 $ 27.34 Market value per share, at December 31, 2015† $ 66.65 $ 53.99 $ 50.45 $ 708.75 $ 66.82 $ 46.55 Total Return, at net asset value (36.7 )% (15.2 )% (17.2 )% (77.6 )% 70.8 % 66.3 % Total Return, at market value (36.5 )% (15.5 )% (17.5 )% (77.5 )% 74.6 % 70.3 % Ratios to Average Net Assets Expense ratio 0.95 % 0.91 % 1.40 % 1.65 % 1.07 % 1.55 % Expense ratio, excluding brokerage commissions 0.85 % 0.85 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.92 )% (0.88 )% (1.36 )% (1.61 )% (1.04 )% (1.50 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2015 Per Share Operating Performance UltraShort Gold UltraShort Short Euro UltraShort UltraShort Euro UltraShort Yen Net asset value, at December 31, 2014 $ 96.6516 $ 57.8071 $ 40.0617 $ 51.3790 $ 21.5946 $ 89.3336 Net investment income (loss) (0.9149 ) (0.4968 ) (0.4096 ) (0.5741 ) (0.2256 ) (0.8243 ) Net realized and unrealized gain (loss)# 20.1432 7.2680 4.1246 7.6533 4.1716 (0.5704 ) Change in net asset value from operations 19.2283 6.7712 3.7150 7.0792 3.9460 (1.3947 ) Net asset value, at December 31, 2015 $ 115.8799 $ 64.5783 $ 43.7767 $ 58.4582 $ 25.5406 $ 87.9389 Market value per share, at December 31, 2014† $ 100.22 $ 59.70 $ 40.03 $ 51.37 $ 21.61 $ 89.30 Market value per share, at December 31, 2015† $ 115.83 $ 64.55 $ 43.74 $ 58.15 $ 25.53 $ 87.89 Total Return, at net asset value 19.9 % 11.7 % 9.3 % 13.8 % 18.3 % (1.6 )% Total Return, at market value 15.6 % 8.1 % 9.3 % 13.2 % 18.1 % (1.6 )% Ratios to Average Net Assets Expense ratio 0.95 % 0.95 % 0.97 % 1.03 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.91 )% (0.91 )% (0.95 )% (1.00 )% (0.90 )% (0.92 )% * See Note 1 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2015 Per Share Operating Performance Ultra Bloomberg Ultra Bloomberg Ultra Gold Ultra Silver Ultra Euro Ultra Yen* Net asset value, at December 31, 2014 $ 101.4800 $ 61.6491 $ 40.0011 $ 39.3657 $ 19.8744 $ 56.4747 Net investment income (loss) (0.5621 ) (0.4982 ) (0.3292 ) (0.3258 ) (0.1505 ) (0.4787 ) Net realized and unrealized gain (loss)# (75.7631 ) (42.5811 ) (9.9424 ) (11.9761 ) (4.2132 ) (1.2433 ) Change in net asset value from operations (76.3252 ) (43.0793 ) (10.2716 ) (12.3019 ) (4.3637 ) (1.7220 ) Net asset value, at December 31, 2015 $ 25.1548 $ 18.5698 $ 29.7295 $ 27.0638 $ 15.5107 $ 54.7527 Market value per share, at December 31, 2014† $ 103.70 $ 63.12 $ 38.41 $ 38.05 $ 19.80 $ 56.48 Market value per share, at December 31, 2015† $ 25.08 $ 18.48 $ 29.73 $ 27.08 $ 15.51 $ 54.70 Total Return, at net asset value (75.2 )% (69.9 )% (25.7 )% (31.3 )% (22.0 )% (3.0 )% Total Return, at market value (75.8 )% (70.7 )% (22.6 )% (28.8 )% (21.7 )% (3.2 )% Ratios to Average Net Assets Expense ratio 1.02 % 1.29 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.98 )% (1.26 )% (0.90 )% (0.89 )% (0.93 )% (0.88 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. Selected data for a Share outstanding throughout the year ended December 31, 2014: For the Year Ended December 31, 2014 Per Share Operating Performance VIX Short- Term Futures VIX Mid- Term Futures Short VIX Short-Term Ultra VIX UltraShort UltraShort Net asset value, at December 31, 2013 $ 142.6934 $ 77.1837 $ 67.4993 $ 8,385.5437 $ 15.8651 $ 23.3212 Net investment income (loss) (1.0237 ) (0.5666 ) (1.0247 ) (72.6365 ) (0.1387 ) (0.1654 ) Net realized and unrealized gain (loss)# (37.0093 ) (13.0151 ) (5.0742 ) (5,176.4342 ) 23.2631 4.8301 Change in net asset value from operations (38.0330 ) (13.5817 ) (6.0989 ) (5,249.0707 ) 23.1244 4.6647 Net asset value, at December 31, 2014 $ 104.6604 $ 63.6020 $ 61.4004 $ 3,136.4730 $ 38.9895 $ 27.9859 Market value per share, at December 31, 2013† $ 142.65 $ 77.16 $ 67.47 $ 8,390.00 $ 15.79 $ 23.12 Market value per share, at December 31, 2014† $ 104.95 $ 63.89 $ 61.16 $ 3,143.75 $ 38.26 $ 27.34 Total Return, at net asset value (26.7 )% (17.6 )% (9.0 )% (62.6 )% 145.8 % 20.0 % Total Return, at market value (26.4 )% (17.2 )% (9.4 )% (62.5 )% 142.3 % 18.3 % Ratios to Average Net Assets Expense ratio 0.92 % 0.87 % 1.49 % 1.80 % 0.98 % 1.18 % Expense ratio, excluding brokerage commissions 0.85 % 0.85 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.88 )% (0.84 )% (1.46 )% (1.78 )% (0.94 )% (1.14 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2014 Per Share Operating Performance UltraShort Gold UltraShort Short Euro UltraShort UltraShort Euro UltraShort Yen Net asset value, at December 31, 2013 $ 103.5180 $ 44.8910 $ 35.5867 $ 46.6384 $ 17.0613 $ 70.8640 Net investment income (loss) (0.8233 ) (0.3937 ) (0.3428 ) (0.4272 ) (0.1642 ) (0.6412 ) Net realized and unrealized gain (loss)# (6.0431 ) 13.3098 4.8178 5.1678 4.6975 19.1108 Change in net asset value from operations (6.8664 ) 12.9161 4.4750 4.7406 4.5333 18.4696 Net asset value, at December 31, 2014 $ 96.6516 $ 57.8071 $ 40.0617 $ 51.3790 $ 21.5946 $ 89.3336 Market value per share, at December 31, 2013† $ 103.53 $ 45.10 $ 35.66 $ 46.66 $ 17.06 $ 70.91 Market value per share, at December 31, 2014† $ 100.22 $ 59.70 $ 40.03 $ 51.37 $ 21.61 $ 89.30 Total Return, at net asset value (6.6 )% 28.8 % 12.6 % 10.2 % 26.6 % 26.1 % Total Return, at market value (3.2 )% 32.4 % 12.3 % 10.1 % 26.7 % 25.9 % Ratios to Average Net Assets Expense ratio 0.95 % 0.95 % 0.96 % 1.01 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.91 )% (0.90 )% (0.93 )% (0.97 )% (0.90 )% (0.90 )% * See Note 1 of these Notes for Financial Statements. # Percentages The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2014 Per Share Operating Performance Ultra Bloomberg Ultra Bloomberg Ultra Gold Ultra Silver Ultra Euro Ultra Yen* Net asset value, at December 31, 2013 $ 320.8990 $ 155.3534 $ 41.2553 $ 63.3305 $ 26.0346 $ 74.5261 Net investment income (loss) (2.1856 ) (1.5167 ) (0.4078 ) (0.5348 ) (0.2185 ) (0.6693 ) Net realized and unrealized gain (loss)# (217.2334 ) (92.1876 ) (0.8464 ) (23.4300 ) (5.9417 ) (17.3821 ) Change in net asset value from operations (219.4190 ) (93.7043 ) (1.2542 ) (23.9648 ) (6.1602 ) (18.0514 ) Net asset value, at December 31, 2014 $ 101.4800 $ 61.6491 $ 40.0011 $ 39.3657 $ 19.8744 $ 56.4747 Market value per share, at December 31, 2013† $ 322.20 $ 157.12 $ 41.26 $ 63.04 $ 25.98 $ 74.44 Market value per share, at December 31, 2014† $ 103.70 $ 63.12 $ 38.41 $ 38.05 $ 19.80 $ 56.48 Total Return, at net asset value (68.4 )% (60.3 )% (3.0 )% (37.8 )% (23.7 )% (24.2 )% Total Return, at market value (67.8 )% (59.8 )% (6.9 )% (39.6 )% (23.8 )% (24.1 )% Ratios to Average Net Assets Expense ratio 0.99 % 1.13 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.95 )% (1.10 )% (0.91 )% (0.91 )% (0.91 )% (0.90 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated.

Risk

Risk	12 Months Ended
	Dec. 31, 2016
Risks and Uncertainties [Abstract]
Risk	NOTE 8 – RISK Correlation and Compounding Risk The Geared Funds do not seek to achieve their stated investment objective over a period of time greater than a single day (as measured from NAV calculation time to NAV calculation time). The return of a Geared Fund for a period longer than a single day is the result of its return for each day compounded over the period and usually will differ from the inverse (-1x), (-2x), Each Ultra and UltraShort Fund uses leverage and should produce daily returns that are more volatile than that of its benchmark. For example, the daily return of an Ultra Fund with a 2x multiple should be approximately two times as volatile on a daily basis as is the return of a fund with an objective of matching the same benchmark. The daily return of a Short or UltraShort Fund is designed to return the inverse (-1x) (-2x) While the Funds expect to meet their investment objectives, several factors may affect their ability to do so. Among these factors are: (1) the Sponsor’s ability to purchase and sell Financial Instruments in a manner that correlates to a Fund’s objective; (2) an imperfect correlation between the performance of Financial Instruments held by a Fund and the performance of the applicable benchmark; (3) bid-ask A number of factors may affect a Geared Fund’s ability to achieve a high degree of correlation with its benchmark, and there can be no guarantee that a Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent a Geared Fund from achieving its investment objective. In order to achieve a high degree of correlation with their underlying benchmarks, the Geared Funds seek to rebalance their portfolios daily to keep exposure consistent with their investment objectives. Being materially under- or over-exposed to the benchmark may prevent such Geared Funds from achieving a high degree of correlation with such benchmark. Market disruptions or closure, large amounts of assets into or out of the Geared Funds, regulatory restrictions or extreme market volatility will adversely affect such Funds’ ability to adjust exposure to requisite levels. The target amount of portfolio exposure is impacted dynamically by the benchmarks’ movements during each day. Because of this, it is unlikely that the Geared Funds will be perfectly exposed ( i.e., -1x, -2x In addition, unlike other funds that do not rebalance their portfolios as frequently, each Geared Fund may be subject to increased trading costs associated with daily portfolio rebalancing in order to maintain appropriate exposure to the underlying benchmarks. Counterparty Risk Certain of the Funds will use swap agreements and/or forward contracts as a means to achieve their respective investment objectives. Such Funds will use either swap agreements and/or forward contracts referencing their respective benchmarks. These Funds may also invest in other swap agreements or forward contracts if such instruments tend to exhibit trading prices or returns that correlate with the benchmark or a component of the benchmark and will further the investment objective of the Fund. Certain Funds may invest in swap agreements or forward contracts if position accountability rules or position limits are reached with respect to specific futures contracts or the market for a specific futures contract experiences emergencies ( e.g. e.g. Swap agreements and forward contracts are generally traded in OTC markets and have only recently become subject to regulation by the CFTC. CFTC rules, however, do not cover all types of swap agreements and forward contracts. Investors, therefore, may not receive the protection of CFTC regulation or the statutory scheme of the Commodity Exchange Act (the “CEA”) in connection with each Fund’s swap agreements or forward contracts. The lack of regulation in these markets could expose investors to significant losses under certain circumstances, including in the event of trading abuses or financial failure by participants. The Funds will be subject to credit risk with respect to the counterparties to the derivatives contracts (whether a clearing corporation in the case of cleared instruments or another third party in the case of OTC uncleared instruments). Unlike in futures contracts, the counterparty to uncleared swap agreements or forward contracts is generally a single bank or other financial institution, rather than a clearing organization backed by a group of financial institutions. As a result, a Fund is subject to credit risk with respect to the amount it expects to receive from counterparties to uncleared swaps and forward contracts entered into as part of that Fund’s principal investment strategy. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, a Fund could suffer significant losses on these contracts and the value of an investor’s investment in a Fund may decline. The Funds have sought to mitigate these risks by generally requiring that the counterparties for each Fund agree to post collateral for the benefit of the Fund, marked to market daily, subject to certain minimum thresholds; however there are no limitations on the percentage of its assets each Fund may invest in swap agreements or forward contracts with a particular counterparty. To the extent any such collateral is insufficient or there are delays in accessing the collateral, the Funds will be exposed to counterparty risk as described above, including possible delays in recovering amounts as a result of bankruptcy proceedings. The Funds typically enter into transactions only with major global financial institutions. OTC swaps or forward contracts are less liquid than futures contracts because they are not traded on an exchange, do not have uniform terms and conditions, and are generally entered into based upon the creditworthiness of the parties and the availability of credit support, such as collateral, and in general, are not transferable without the consent of the counterparty. If the level of the Fund’s benchmark has a dramatic intraday move that would cause a material decline in the Fund’s NAV, the terms of the swap may permit the counterparty to immediately close out the transaction with the Fund. In that event, it may not be possible for the Fund to enter into another swap agreement or to invest in other Financial Instruments necessary to achieve the desired exposure consistent with the Fund’s objective. This, in turn, may prevent the Fund from achieving its investment objective, particularly if the level of the Fund’s benchmark reverses all or part of its intraday move by the end of the day. In addition, cleared derivative transactions benefit from daily marking-to-market Each counterparty and/or any of its affiliates may be an Authorized Participant or shareholder of a Fund. The counterparty risk for cleared derivative transactions is generally lower than for uncleared OTC derivatives since generally a clearing organization becomes substituted for each counterparty to a cleared derivative contract and, in effect, guarantees the parties’ performance under the contract as each party to a trade looks only to the clearing house for performance of financial obligations. However, there can be no assurance that the clearing house, or its members, will satisfy its obligations to the Fund. Leverage Risk The Leveraged Funds may utilize leverage in seeking to achieve their respective investment objectives and will lose more money in market environments adverse to their respective daily investment objectives than funds that do not employ leverage. The use of leveraged and/or inverse leveraged positions could result in the total loss of an investor’s investment. For example, because the UltraShort Funds and Ultra Funds include a two times the inverse (-2x), or single-day single-day single-day Liquidity Risk Financial Instruments cannot always be liquidated at the desired price. It is difficult to execute a trade at a specific price when there is a relatively small volume of buy and sell orders in a market. A market disruption can also make it difficult to liquidate a position or find a swap or forward contract counterparty at a reasonable cost. Market illiquidity may cause losses for the Funds. The large size of the positions which the Funds may acquire increases the risk of illiquidity by both making their positions more difficult to liquidate and increasing the losses incurred while trying to do so. Any type of disruption or illiquidity will potentially be exacerbated due to the fact that the Funds will typically invest in Financial Instruments related to one benchmark, which in many cases is highly concentrated. “Contango” and “Backwardation” Risk In Funds that hold futures contracts, as the futures contracts near expiration, they are generally replaced by contracts that have a later expiration. Thus, for example, a contract purchased and held in November 2015 may specify a January 2016 expiration. As that contract nears expiration, it may be replaced by selling the January 2016 contract and purchasing the contract expiring in March 2016. This process is referred to as “rolling.” Rolling may have a positive or negative impact on performance. For example, historically, the prices of certain types of futures contracts have frequently been higher for contracts with shorter-term expirations than for contracts with longer-term expirations, which is referred to as “backwardation.” In these circumstances, absent other factors, the sale of the January 2016 contract would take place at a price that is higher than the price at which the March 2016 contract is purchased, thereby creating a gain in connection with rolling. While certain types of futures contracts have historically exhibited consistent periods of backwardation, backwardation will likely not exist in these markets at all times. The presence of contango (where prices of contracts are higher in the distant delivery months than in the nearer delivery months due to the costs of long-term storage of a physical commodity prior to delivery or other factors) in certain futures contracts at the time of rolling would be expected to adversely affect an Ultra Fund or a Matching VIX Fund that invests in such futures, and positively affect a Short Fund or an UltraShort Fund that invests in such futures. Similarly, the presence of backwardation in certain futures contracts at the time of rolling such contracts would be expected to adversely affect the Short Funds and UltraShort Funds, and positively affect the Ultra Funds and Matching VIX Funds. Since the introduction of VIX futures contracts, there have frequently been periods where VIX futures prices reflect higher expected volatility levels further out in time. This can result in a loss from “rolling” the VIX futures to maintain the constant weighted average maturity of the applicable VIX Futures Index. Losses from exchanging a lower priced VIX future for a higher priced longer-term future in the rolling process would adversely affect the value of each VIX Futures Index and, accordingly, decrease the return of the Ultra VIX Short-Term Futures ETF and the Matching VIX Funds. Gold and silver historically exhibit persistent “contango” markets rather than backwardation. Natural gas, like crude oil, moves in and out of backwardation and contango but historically has been in contango most commonly. It is generally believed this is because the market needs to build inventories for most of the year in order to have enough storage to make it through a normal winter. Periods of backwardation are typically thought to be caused by demand shocks or supply shortages such as an unusually cold winter or a hurricane.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	NOTE 9 – SUBSEQUENT EVENTS Management has evaluated the possibility of subsequent events existing in the Trust’s and the Funds’ financial statements through the date the financial statements were issued. The subsequent events were as follows: On December 22, 2016, the Trust announced a 2-for-1 split of the shares of beneficial interest of ProShares UltraShort Bloomberg Crude Oil (NYSE Arca symbol “SCO”). The split was effective prior to the opening of trading on NYSE Arca on January 12, 2017. The split was effective for shareholders of record after the close of the markets on January 9, 2017 and payable after the close of the markets on January 11, 2017. The Fund traded at its post-split price on January 12, 2017. The ticker symbol for the Fund did not change, and the Fund continues to trade on NYSE Arca. The split was applied retroactively for all periods presented, increasing the number of shares outstanding for ProShares UltraShort Bloomberg Crude Oil, and resulted in a proportionate decrease in the price per share and per share information of ProShares UltraShort Bloomberg Crude Oil. Therefore, the split did not change the aggregate net asset value of a shareholder’s investment at the time of the split. On December 22, 2016, the Trust announced a 1-for-2 reverse split of the shares of beneficial interest of ProShares Ultra Bloomberg Crude Oil (NYSE Arca symbol “UCO”) and a 1-for-5 reverse split of the shares of beneficial interest of ProShares Ultra VIX Short-Term Futures ETF (NYSE Arca symbol “UVXY”). The reverse splits were effective prior to the opening of trading on NYSE Arca on January 12, 2017. The reverse splits were effective for shareholders at the market open on January 12, 2017, when the Funds traded at their post-split price. The ticker symbols for the Funds did not change, and each Fund was issued a new CUSIP numbers. The reverse splits were applied retroactively for all periods presented, reducing the number of shares outstanding for ProShares Ultra Bloomberg Crude Oil and ProShares Ultra VIX Short-Term Futures ETF, and resulted in a proportionate increase in the price per share and per share information of ProShares Ultra Bloomberg Crude Oil and ProShares Ultra VIX Short-Term Futures ETF. Therefore, the reverse splits did not change the aggregate net asset value of a shareholder’s investment at the time of the reverse splits.

Significant Accounting Polici17

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Use of Estimates and Indemnifications	Use of Estimates & Indemnifications The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the normal course of business, the Trust enters into contracts that contain a variety of representations which provide general indemnifications. The Trust’s maximum exposure under these arrangements cannot be known; however, the Trust expects any risk of loss to be remote.
Basis of Presentation	Basis of Presentation Pursuant to rules and regulations of the U.S. Securities and Exchange Commission (“SEC”), audited financial statements are presented for the Trust as a whole, as the SEC registrant, and for each Fund individually. The debts, liabilities, obligations and expenses incurred, contracted for or otherwise existing with respect to a particular Fund shall be enforceable only against the assets of such Fund and not against the assets of the Trust generally or any other Fund. Accordingly, the assets of one Fund of the Trust include only those funds and other assets that are paid to, held by or distributed to the Trust for the purchase of Shares in that Fund.
Statement of Cash Flows	Statement of Cash Flows The cash amount shown in the Statements of Cash Flows is the amount reported as cash in the Statement of Financial Condition dated December 31, 2016 and 2015, and represents non-segregated
Final Net Asset Value for Fiscal Period	Final Net Asset Value for Fiscal Period The cut-off Create/Redeem Cut-off* NAV Calculation Time NAV Calculation Date UltraShort Silver, Ultra Silver 6:30 a.m. 7:00 a.m. December 30 UltraShort Gold, Ultra Gold 9:30 a.m. 10:00 a.m. December 30 UltraShort Bloomberg Crude Oil, Ultra Bloomberg Crude Oil 2:00 p.m. 2:30 p.m. December 30 UltraShort Bloomberg Natural Gas, Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 30 UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 30 Short Euro, 3:00 p.m. 4:00 p.m. December 30 UltraShort Euro, Ultra Euro UltraShort Yen, Ultra Yen 3:00 p.m. 4:00 p.m. December 30 VIX Short-Term Futures ETF, Ultra VIX Short-Term Futures ETF, Short VIX Short-Term Futures ETF 2:00 p.m. 4:15 p.m. December 30 VIX Mid-Term 2:00 p.m. 4:15 p.m. December 30 * Although the Funds’ shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the year ended December 31, 2016. Market value per Share is determined at the close of the NYSE Arca and may be later than when the Funds’ NAV per Share is calculated. For financial reporting purposes, the Funds value transactions based upon the final closing price in their primary markets. Accordingly, the investment valuations in these financial statements may differ from those used in the calculation of certain of the Funds’ final creation/redemption NAV for the year ended December 31, 2016.
Investment Valuation	Investment Valuation Short-term investments are valued at amortized cost which approximates fair value for daily NAV purposes. For financial reporting purposes, short-term investments are valued at their market price using information provided by a third-party pricing service or market quotations. In each of these situations, valuations are typically categorized as Level I in the fair value hierarchy. Derivatives ( e.g. non-exchange-traded Fair value pricing may require subjective determinations about the value of an investment. While the Funds’ policies are intended to result in a calculation of its respective Fund’s NAV that fairly reflects investment values as of the time of pricing, such Fund cannot ensure that fair values determined by the Sponsor or persons acting at their direction would accurately reflect the price that a Fund could obtain for an investment if it were to dispose of that investment as of the time of pricing (for instance, in a forced or distressed sale). The prices used by such Fund may differ from the value that would be realized if the investments were sold and the differences could be material to the financial statements.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Funds disclose the fair value of their investments in a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The disclosure requirements establish a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of the Funds (observable inputs); and (2) the Funds’ own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the disclosure requirements 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 in different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls is determined based on the lowest input level that is significant to the fair value measurement in its entirety. Fair value measurements also require additional disclosure when the volume and level of activity for the asset or liability have significantly decreased, as well as when circumstances indicate that a transaction is not orderly. The following table summarizes the valuation of investments at December 31, 2016 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total VIX Short-Term Futures ETF $ 147,991,233 $ (468,652 ) $ — $ — $ — $ 147,522,581 VIX Mid-Term 45,486,235 (1,288,245 ) — — — 44,197,990 Short VIX Short-Term Futures ETF 170,396,436 (10,309,611 ) — — — 160,086,825 Ultra VIX Short-Term Futures ETF 434,671,795 (7,972,237 ) — — — 426,699,558 UltraShort Bloomberg Crude Oil 205,694,385 (1,426,815 ) — — (12,206,881 ) 192,060,689 UltraShort Bloomberg Natural Gas 2,899,151 (482,031 ) — — — 2,417,120 UltraShort Gold 60,540,555 18,980 3,033,566 — — 63,593,101 UltraShort Silver 21,550,319 27,310 1,384,246 — — 22,961,875 Short Euro 13,164,828 132,900 — — — 13,297,728 UltraShort Australian Dollar 12,909,619 1,182,340 — — — 14,091,959 UltraShort Euro 337,375,787 — — 16,162,931 — 353,538,718 UltraShort Yen 257,102,313 — — 16,744,937 — 273,847,250 Ultra Bloomberg Crude Oil 885,050,007 5,537,165 — — 55,358,571 945,945,743 Ultra Bloomberg Natural Gas 36,183,648 2,536,720 — — — 38,720,368 Ultra Gold 95,356,621 (18,960 ) (4,431,107 ) — — 90,906,554 Ultra Silver 295,300,799 (27,360 ) (20,976,189 ) — — 274,297,250 Ultra Euro 11,891,831 — — (574,010 ) — 11,317,821 Ultra Yen 5,282,879 — — (342,076 ) — 4,940,803 Total Trust $ 3,038,848,441 $ (12,558,496 ) $ (20,989,484 ) $ 31,991,782 $ 43,151,690 $ 3,080,443,933 * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. At December 31, 2016, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. The Funds’ policy is to recognize transfers between valuation levels at the end of the reporting period. At December 31, 2016, there were no significant transfers in or out of Level I and Level II fair value measurements. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. The following table summarizes the valuation of investments at December 31, 2015 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total VIX Short-Term Futures ETF $ 96,073,659 $ (1,078,625 ) $ — $ — $ — $ 94,995,034 VIX Mid-Term 25,976,287 (344,360 ) — — — 25,631,927 Short VIX Short-Term Futures ETF 535,392,718 10,746,415 — — — 546,139,133 Ultra VIX Short-Term Futures ETF 438,357,849 11,894,466 — — — 450,252,315 UltraShort Bloomberg Crude Oil 79,692,642 2,464,513 — — 6,412,656 88,569,811 UltraShort Bloomberg Natural Gas 8,115,004 (2,471,164 ) — — — 5,643,840 UltraShort Gold 72,979,905 5,220 1,808,942 — — 74,794,067 UltraShort Silver 50,730,230 5,970 4,778,279 — — 55,514,479 Short Euro 15,153,211 243,438 — — — 15,396,649 UltraShort Australian Dollar 18,408,894 (420,270 ) — — — 17,988,624 UltraShort Euro 546,166,776 — — (28,710,336 ) — 517,456,440 UltraShort Yen 259,997,001 — — (13,895,452 ) — 246,101,549 Ultra Bloomberg Crude Oil 797,650,543 (17,929,314 ) — — (72,176,589 ) 707,544,640 Ultra Bloomberg Natural Gas 26,807,731 6,312,879 — — — 33,120,610 Ultra Gold 71,912,587 (5,200 ) (2,250,595 ) — — 69,656,792 Ultra Silver 238,899,626 (9,030 ) (22,561,101 ) — — 216,329,495 Ultra Euro 11,605,262 — — 604,920 — 12,210,182 Ultra Yen 5,069,491 — — 261,311 — 5,330,802 Total Trust** $ 3,298,989,416 $ 9,414,938 $ (18,224,475 ) $ (41,739,557 ) $ (65,763,933 ) $ 3,182,676,389 * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. ** Amounts exclude the activity of: ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016. At December 31, 2015, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. The Funds’ policy is to recognize transfers between valuation levels at the end of the reporting period. At December 31, 2015, there were no significant transfers in or out of Level I and Level II fair value measurements. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities.
Investment Transactions and Related Income	Investment Transactions and Related Income Investment transactions are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized appreciation/depreciation on open contracts are reflected in the Statements of Financial Condition and changes in the unrealized appreciation/depreciation between periods are reflected in the Statements of Operations. Discounts on short-term securities purchased are amortized and reflected as Interest Income in the Statements of Operations.
Brokerage Commissions and Fees	Brokerage Commissions and Fees Each Fund pays its respective brokerage commissions, including applicable exchange fees, National Futures Association (“NFA”) fees, give-up
Federal Income Tax	Federal Income Tax Each Fund is registered as a series of a Delaware statutory trust and is treated as a partnership for U.S. federal income tax purposes. Accordingly, no Fund expects to incur U.S. federal income tax liability; rather, each beneficial owner of a Fund’s Shares is required to take into account its allocable share of its Fund’s income, gain, loss, deductions and other items for its Fund’s taxable year ending with or within the beneficial owner’s taxable year. Management of the Funds has reviewed all open tax years and major jurisdictions ( i.e. on-going

Organization (Tables)

Organization (Tables)	12 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Share Splits and Reverse Share Splits	The table below includes Share splits and reverse Share splits for the Funds during the years ended December 31, 2014, 2015 and 2016. The ticker symbols for these Funds did not change, and each Fund continues to trade on the NYSE Arca. Fund Execution Date (Prior to Opening of Trading) Type of Split Date Trading Resumed at Post- Split Price ProShares Short VIX Short-Term Futures ETF January 21, 2014 2-for-1 Share split January 24, 2014 ProShares Ultra VIX Short-Term Futures ETF January 21, 2014 1-for-4 reverse Share split January 24, 2014 ProShares Ultra Silver January 21, 2014 1-for-4 reverse Share split January 24, 2014 ProShares VIX Mid-Term Futures November 6, 2014 1-for-4 reverse Share split November 6, 2014 ProShares Ultra VIX Short-Term Futures ETF May 20, 2015 1-for-5 reverse Share split May 20, 2015 ProShares Ultra Bloomberg Crude Oil May 20, 2015 1-for-5 reverse Share split May 20, 2015 ProShares Ultra Bloomberg Natural Gas May 20, 2015 1-for-4 May 20, 2015 ProShares Ultra Yen May 20, 2015 1-for-4 May 20, 2015 ProShares UltraShort Silver November 13, 2015 2-for-1 November 13, 2015 ProShares UltraShort Bloomberg Natural Gas July 20, 2016 3-for-1 July 25, 2016 ProShares VIX Short-Term Futures ETF July 25, 2016 1-for-5 July 25, 2016 ProShares Ultra VIX Short-Term Futures ETF July 25, 2016 1-for-5 July 25, 2016

Significant Accounting Polici19

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Cut-off Times and Times of Calculation of Funds' Final Net Asset Value for Creation and Redemption of Fund Shares	The cut-off Create/Redeem Cut-off* NAV Calculation Time NAV Calculation Date UltraShort Silver, Ultra Silver 6:30 a.m. 7:00 a.m. December 30 UltraShort Gold, Ultra Gold 9:30 a.m. 10:00 a.m. December 30 UltraShort Bloomberg Crude Oil, Ultra Bloomberg Crude Oil 2:00 p.m. 2:30 p.m. December 30 UltraShort Bloomberg Natural Gas, Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 30 UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 30 Short Euro, 3:00 p.m. 4:00 p.m. December 30 UltraShort Euro, Ultra Euro UltraShort Yen, Ultra Yen 3:00 p.m. 4:00 p.m. December 30 VIX Short-Term Futures ETF, Ultra VIX Short-Term Futures ETF, Short VIX Short-Term Futures ETF 2:00 p.m. 4:15 p.m. December 30 VIX Mid-Term 2:00 p.m. 4:15 p.m. December 30 * Although the Funds’ shares may continue to trade on secondary markets subsequent to the calculation of the final NAV, these times represent the final opportunity to transact in creation or redemption units for the year ended December 31, 2016.
Valuation of Investments using Fair Value Hierarchy	The following table summarizes the valuation of investments at December 31, 2016 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total VIX Short-Term Futures ETF $ 147,991,233 $ (468,652 ) $ — $ — $ — $ 147,522,581 VIX Mid-Term 45,486,235 (1,288,245 ) — — — 44,197,990 Short VIX Short-Term Futures ETF 170,396,436 (10,309,611 ) — — — 160,086,825 Ultra VIX Short-Term Futures ETF 434,671,795 (7,972,237 ) — — — 426,699,558 UltraShort Bloomberg Crude Oil 205,694,385 (1,426,815 ) — — (12,206,881 ) 192,060,689 UltraShort Bloomberg Natural Gas 2,899,151 (482,031 ) — — — 2,417,120 UltraShort Gold 60,540,555 18,980 3,033,566 — — 63,593,101 UltraShort Silver 21,550,319 27,310 1,384,246 — — 22,961,875 Short Euro 13,164,828 132,900 — — — 13,297,728 UltraShort Australian Dollar 12,909,619 1,182,340 — — — 14,091,959 UltraShort Euro 337,375,787 — — 16,162,931 — 353,538,718 UltraShort Yen 257,102,313 — — 16,744,937 — 273,847,250 Ultra Bloomberg Crude Oil 885,050,007 5,537,165 — — 55,358,571 945,945,743 Ultra Bloomberg Natural Gas 36,183,648 2,536,720 — — — 38,720,368 Ultra Gold 95,356,621 (18,960 ) (4,431,107 ) — — 90,906,554 Ultra Silver 295,300,799 (27,360 ) (20,976,189 ) — — 274,297,250 Ultra Euro 11,891,831 — — (574,010 ) — 11,317,821 Ultra Yen 5,282,879 — — (342,076 ) — 4,940,803 Total Trust $ 3,038,848,441 $ (12,558,496 ) $ (20,989,484 ) $ 31,991,782 $ 43,151,690 $ 3,080,443,933 * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. At December 31, 2016, there were no Level III portfolio investments for which significant unobservable inputs were used to determine fair value. The Funds’ policy is to recognize transfers between valuation levels at the end of the reporting period. At December 31, 2016, there were no significant transfers in or out of Level I and Level II fair value measurements. The inputs or methodology used for valuing investments are not necessarily an indication of the risk associated with investing in those securities. The following table summarizes the valuation of investments at December 31, 2015 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total VIX Short-Term Futures ETF $ 96,073,659 $ (1,078,625 ) $ — $ — $ — $ 94,995,034 VIX Mid-Term 25,976,287 (344,360 ) — — — 25,631,927 Short VIX Short-Term Futures ETF 535,392,718 10,746,415 — — — 546,139,133 Ultra VIX Short-Term Futures ETF 438,357,849 11,894,466 — — — 450,252,315 UltraShort Bloomberg Crude Oil 79,692,642 2,464,513 — — 6,412,656 88,569,811 UltraShort Bloomberg Natural Gas 8,115,004 (2,471,164 ) — — — 5,643,840 UltraShort Gold 72,979,905 5,220 1,808,942 — — 74,794,067 UltraShort Silver 50,730,230 5,970 4,778,279 — — 55,514,479 Short Euro 15,153,211 243,438 — — — 15,396,649 UltraShort Australian Dollar 18,408,894 (420,270 ) — — — 17,988,624 UltraShort Euro 546,166,776 — — (28,710,336 ) — 517,456,440 UltraShort Yen 259,997,001 — — (13,895,452 ) — 246,101,549 Ultra Bloomberg Crude Oil 797,650,543 (17,929,314 ) — — (72,176,589 ) 707,544,640 Ultra Bloomberg Natural Gas 26,807,731 6,312,879 — — — 33,120,610 Ultra Gold 71,912,587 (5,200 ) (2,250,595 ) — — 69,656,792 Ultra Silver 238,899,626 (9,030 ) (22,561,101 ) — — 216,329,495 Ultra Euro 11,605,262 — — 604,920 — 12,210,182 Ultra Yen 5,069,491 — — 261,311 — 5,330,802 Total Trust** $ 3,298,989,416 $ 9,414,938 $ (18,224,475 ) $ (41,739,557 ) $ (65,763,933 ) $ 3,182,676,389 * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures. ** Amounts exclude the activity of: ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016.

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Fair Value of Derivative Instruments	The following tables indicate the location of derivative related items on the Statement of Financial Condition as well as the effect of derivative instruments on the Statement of Operations during the reporting period. Fair Value of Derivative Instruments as of December 31, 2016 Assets Derivatives Liability Derivatives Derivatives not accounted for as hedging instruments Statements of Financial Condition Location Fund Unrealized Appreciation Statements of Financial Condition Location Fund Unrealized Depreciation VIX Futures Contracts Receivables on open futures contracts ProShares VIX Short-Term Futures ETF $ 2,273,874 * Payable on open futures contracts ProShares VIX Short-Term Futures ETF $ 2,742,526 * ProShares VIX Mid- 68,375 * ProShares VIX Mid-Term 1,356,620 * ProShares Ultra VIX Short-Term 13,594,875 * ProShares Short VIX Short-Term 10,309,611 * ProShares Ultra VIX Short-Term Futures ETF 21,567,112 * Commodities Contracts Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements ProShares UltraShort Gold 3,052,546 * Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil 13,633,696 * ProShares UltraShort Silver 1,411,556 * ProShares UltraShort Bloomberg Natural Gas 482,031 * ProShares Ultra Bloomberg Crude Oil 60,895,736 * ProShares Ultra Gold 4,450,067 * ProShares Ultra Bloomberg Natural Gas 2,536,720 * ProShares Ultra Silver 21,003,549 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts ProShares Short Euro 132,900 * Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts ProShares UltraShort Euro 356,139 ProShares UltraShort Australian Dollar 1,182,340 * ProShares UltraShort Yen 125,420 ProShares UltraShort Euro 16,519,070 ProShares Ultra Euro 576,558 ProShares UltraShort Yen 16,870,357 ProShares Ultra Yen 342,455 ProShares Ultra Euro 2,548 ProShares Ultra Yen 379 Total Trust $ 118,541,276 * Total Trust $ 76,945,784 * * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. Fair Value of Derivative Instruments as of December 31, 2015 Assets Derivatives Liability Derivatives Derivatives not accounted for as hedging instruments Statements of Financial Condition Location Fund Unrealized Statements of Financial Condition Location Fund Unrealized VIX Futures Contracts Receivables on open futures contracts ProShares VIX Mid- $ 10,005 * Payable on open futures contracts ProShares VIX Short- Term Futures ETF $ 1,078,625 * ProShares Short VIX Short-Term Futures ETF 10,805,245 * ProShares VIX Mid-Term 354,365 * ProShares Ultra VIX Short-Term Futures ETF 11,894,466 * ProShares Short VIX Short-Term Futures ETF 58,830 * Commodities Contracts Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil 8,877,169 * Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Natural Gas 2,471,164 * ProShares Ultra Bloomberg Natural Gas 6,312,879 * ProShares Ultra Bloomberg Crude Oil 90,105,903 * ProShares UltraShort Gold 1,814,162 * ProShares Ultra Gold 2,255,795 * ProShares UltraShort Silver 4,784,249 * ProShares Ultra Silver 22,570,131 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts ProShares Short Euro 243,438 * Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts ProShares UltraShort Australian Dollar 420,270 * ProShares UltraShort Yen 933,727 ProShares UltraShort Euro 28,710,336 ProShares Ultra Euro 604,920 ProShares UltraShort Yen 14,829,179 ProShares Ultra Yen 267,014 ProShares Ultra Yen 5,703 Total Trust** $ 46,547,274 * Total Trust** $ 162,860,301 * * Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts. ** Amounts exclude the activity of: ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016.
Effect of Derivative Instruments on Statements of Operations	The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2016 Derivatives not accounted for as hedging instruments Location of Gain (Loss) on Derivatives Fund Realized Gain (Loss) on Derivatives Change in Unrealized Recognized in VIX Futures Contracts Net realized gain (loss) on futures contracts/ changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term Futures ETF $ (195,475,791 ) $ 609,973 ProShares VIX Mid-Term (11,085,506 ) (943,885 ) ProShares Short VIX Short-Term Futures ETF 440,391,389 (21,056,026 ) ProShares Ultra VIX Short-Term Futures ETF (1,567,340,688 ) (19,866,703 ) Commodity Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil (67,752,164 ) (22,510,865 ) ProShares UltraShort Bloomberg Natural Gas 586,860 1,989,133 ProShares UltraShort Gold (12,240,751 ) 1,238,384 ProShares UltraShort Silver (17,554,714 ) (3,372,693 ) ProShares Ultra Bloomberg Crude Oil 74,061,040 151,001,639 ProShares Ultra Bloomberg Natural Gas 17,571,809 (3,776,159 ) ProShares Ultra Gold 5,816,565 (2,194,272 ) ProShares Ultra Silver 62,342,441 1,566,582 Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts ProShares Short Euro 663,774 (110,538 ) ProShares UltraShort Australian Dollar (2,787,204 ) 1,602,610 ProShares UltraShort Euro (25,711,518 ) 44,873,267 ProShares UltraShort Yen (22,220,271 ) 30,640,389 ProShares Ultra Euro 138,959 (1,178,930 ) ProShares Ultra Yen 717,086 (603,387 ) Total Trust $ (1,319,878,684 ) $ 157,908,519 The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2015 Derivatives not accounted for as Location of Gain or (Loss) on Derivatives Recognized in Income Fund Realized Gain or (Loss) on Recognized in Income Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in VIX Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term $ (19,408,543 ) $ (7,343,245 ) ProShares VIX Mid-Term (3,335,936 ) (605,025 ) ProShares Short VIX Short-Term Futures ETF 69,793,028 27,098,564 ProShares Ultra VIX Short-Term Futures ETF (392,174,228 ) (27,690,787 ) Commodity Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil 91,670,324 (33,947,511 ) ProShares UltraShort Bloomberg Natural Gas 15,212,804 (6,412,629 ) ProShares UltraShort Gold 12,707,635 4,101,460 ProShares UltraShort Silver 10,759,545 4,187,736 ProShares Ultra Bloomberg Crude Oil (896,177,096 ) 32,549,981 ProShares Ultra Bloomberg Natural Gas (100,776,817 ) 41,202,162 ProShares Ultra Gold (18,605,815 ) (4,311,529 ) ProShares Ultra Silver (78,309,309 ) (10,173,451 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts ProShares Short Euro 1,559,425 (141,893 ) ProShares UltraShort Australian Dollar 4,330,463 (1,163,751 ) ProShares UltraShort Euro 131,651,572 (45,473,330 ) ProShares UltraShort Yen 8,809,464 (12,316,677 ) ProShares Ultra Euro (1,982,208 ) 708,291 ProShares Ultra Yen (472,913 ) 276,556 Total Trust* $ (1,164,748,605 ) $ (39,455,078 ) * Amounts exclude the activity of: ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016. The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2014 Derivatives not accounted for as hedging instruments Location of Gain or (Loss) on Derivatives Recognized in Income Fund Realized Gain or (Loss) on Recognized in Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income VIX Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term $ (694,347 ) $ 22,917,306 ProShares VIX Mid-Term (14,378,810 ) 5,157,354 ProShares Short VIX Short-Term 76,925,998 (24,469,104 ) ProShares Ultra VIX Short-Term (139,412,525 ) 63,595,164 Commodity Contracts Net realized gain (loss) on futures contracts, swap and/or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts, swap and/or forward agreements ProShares UltraShort Bloomberg Crude Oil 99,327,097 46,390,353 ProShares UltraShort Bloomberg Natural Gas 8,791,719 2,899,165 ProShares UltraShort Gold (5,316,482 ) (7,934,871 ) ProShares UltraShort Silver 15,114,883 2,810,170 ProShares Ultra Bloomberg Crude Oil (243,325,957 ) (125,240,438 ) ProShares Ultra Bloomberg Natural Gas (6,464,796 ) (31,232,744 ) ProShares Ultra Gold (9,674,333 ) 8,883,268 ProShares Ultra Silver (155,551,420 ) (9,889,600 ) Foreign Exchange Contracts Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts ProShares Short Euro 1,593,048 418,562 ProShares UltraShort Australian Dollar 2,296,216 (174,124 ) ProShares UltraShort Euro 83,678,955 30,511,501 ProShares UltraShort Yen 127,846,225 (30,965,459 ) ProShares Ultra Euro (420,533 ) (204,333 ) ProShares Ultra Yen (540,398 ) 144,064 Total Trust* $ (160,205,460 ) $ (46,383,766 ) * Amounts exclude the activity of ProShares Ultra Australian Dollar which liquidated on June 29, 2015, ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016.
Offsetting of Financial Assets and Liabilities	The following table presents each Fund’s derivatives by investment type and by counterparty net of amounts available for offset under a master netting agreement and the related collateral received or pledged by the Funds as of December 31, 2016: Fair Values of Derivative Instruments as of December 31, 2016 Assets Liabilities Gross Gross Net Amounts of Gross Gross Net Amounts of ProShares UltraShort Bloomberg Crude Oil Swap agreements $ — $ — $ — $ 12,206,881 $ — $ 12,206,881 ProShares UltraShort Gold Forward agreements 3,033,566 — 3,033,566 — — — ProShares UltraShort Silver Forward agreements 1,384,246 — 1,384,246 — — — ProShares UltraShort Euro Foreign currency forward contracts 16,519,070 — 16,519,070 356,139 — 356,139 ProShares UltraShort Yen Foreign currency forward contracts 16,870,357 — 16,870,357 125,420 — 125,420 ProShares Ultra Bloomberg Crude Oil Swap agreements 55,358,571 — 55,358,571 — — — ProShares Ultra Gold Forward agreements — — — 4,431,107 — 4,431,107 ProShares Ultra Silver Forward agreements — — — 20,976,189 — 20,976,189 ProShares Ultra Euro Foreign currency forward contracts 2,548 — 2,548 576,558 — 576,558 ProShares Ultra Yen Foreign currency forward contracts 379 — 379 342,455 — 342,455 The following table presents each Fund’s derivatives by investment type and by counterparty net of amounts available for offset under a master netting agreement and the related collateral received or pledged by the Funds as of December 31, 2015: Fair Values of Derivative Instruments as of December 31, 2015 Assets Liabilities Gross Gross the Statements Net Amounts of Assets Gross Gross Statements Net Amounts of ProShares UltraShort Bloomberg Crude Oil Swap agreements $ 6,412,656 $ — $ 6,412,656 $ — $ — $ — ProShares UltraShort Gold Forward agreements 1,808,942 — 1,808,942 — — — ProShares UltraShort Silver Forward agreements 4,778,279 — 4,778,279 — — — ProShares UltraShort Euro Foreign currency forward contracts — — — 28,710,336 — 28,710,336 ProShares UltraShort Yen Foreign currency forward contracts 933,727 — 933,727 14,829,179 — 14,829,179 ProShares Ultra Bloomberg Crude Oil Swap agreements — — — 72,176,589 — 72,176,589 ProShares Ultra Gold Forward agreements — — — 2,250,595 — 2,250,595 ProShares Ultra Silver Forward agreements — — — 22,561,101 — 22,561,101 ProShares Ultra Euro Foreign currency forward contracts 604,920 — 604,920 — — — ProShares Ultra Yen Foreign currency forward contracts 267,014 — 267,014 5,703 — 5,703
Gross Amounts Not Offset in Statements of Financial Condition	Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2016. These amounts may be collateralized by cash or financial instruments, segregated for the benefit of the Funds or the counterparties, depending on whether the related contracts are in an appreciated or depreciated position at period end. Amounts shown in the column labeled “Net Amount” represent the uncollateralized portions of these amounts at period end. These amounts may be un-collateralized Gross Amounts Not Offset in the Statements of Financial Condition as of December 31, 2016 Amounts of Recognized Assets / (Liabilities) Statements of Financial Instruments for the Benefit of (the Funds) / the Counterparties Cash Collateral for the Benefit of (the Funds) / the Net Amount ProShares UltraShort Bloomberg Crude Oil Citibank N.A. $ (4,742,191 ) $ 4,742,191 $ — $ — Goldman Sachs International (3,061,395 ) 3,061,395 — — Societe Generale S.A. (1,050,699 ) 1,050,699 — — UBS AG (3,352,596 ) 3,352,596 — — ProShares UltraShort Gold Citibank N.A. 1,147,811 — — 1,147,811 Goldman Sachs International 881,454 (874,948 ) — 6,506 Societe Generale S.A. 393,006 (393,006 ) — — UBS AG 611,295 — (611,295 ) — ProShares UltraShort Silver Citibank N.A. 610,478 — — 610,478 Goldman Sachs International 323,829 (323,829 ) — — Societe Generale S.A. 86,543 (86,543 ) — — UBS AG 363,396 — (363,396 ) — ProShares UltraShort Euro Goldman Sachs International 8,109,067 (8,109,067 ) — — UBS AG 8,053,864 — (8,053,864 ) — ProShares UltraShort Yen Goldman Sachs International 8,256,779 (7,771,819 ) — 484,960 UBS AG 8,488,158 — (7,980,000 ) 508,158 ProShares Ultra Bloomberg Crude Oil Citibank N.A. 18,427,009 — — 18,427,009 Goldman Sachs International 14,016,906 (14,016,906 ) — — Societe Generale S.A. 8,661,821 (8,661,821 ) — — UBS AG 14,252,835 — (14,252,835 ) — ProShares Ultra Gold Citibank N.A. (1,464,982 ) 1,464,982 — — Goldman Sachs International (1,112,916 ) 1,112,916 — — Societe Generale S.A. (643,587 ) 643,587 — — UBS AG (1,209,622 ) 1,209,622 — — ProShares Ultra Silver Citibank N.A. (6,946,009 ) 6,946,009 — — Goldman Sachs International (5,869,092 ) 5,869,092 — — Societe Generale S.A. (2,532,729 ) 2,532,729 — — UBS AG (5,628,359 ) 5,628,359 — — ProShares Ultra Euro Goldman Sachs International (239,256 ) 239,256 — — UBS AG (334,754 ) 334,754 — — ProShares Ultra Yen Goldman Sachs International (219,736 ) 219,736 — — UBS AG (122,340 ) 122,340 — — Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2015. These amounts may be collateralized by cash or financial instruments, segregated for the benefit of the Funds or the counterparties, depending on whether the related contracts are in an appreciated or depreciated position at period end. Amounts shown in the column labeled “Net Amount” represent the uncollateralized portions of these amounts at period end. These amounts may be un-collateralized Gross Amounts Not Offset in the Statements of Financial Condition as of December 31, 2015 Amounts of Financial Cash Collateral Net Amount ProShares UltraShort Bloomberg Crude Oil Citibank N.A. $ 1,098,278 $ — $ — $ 1,098,278 Deutsche Bank AG 1,722,894 — (1,722,894 ) — Goldman Sachs International 1,595,552 (1,595,552 ) — — Societe Generale S.A. 521,142 (521,142 ) — — UBS AG 1,474,790 (1,474,790 ) — — ProShares UltraShort Gold Citibank N.A. 3,915 — — 3,915 Deutsche Bank AG 1,046,664 — (1,046,664 ) — Goldman Sachs International 158,827 — — 158,827 Societe Generale S.A. 212,680 (212,680 ) — — UBS AG 386,856 (386,856 ) — — ProShares UltraShort Silver Deutsche Bank AG 2,500,263 — (2,500,000 ) 263 Goldman Sachs International 1,044,986 (858,460 ) — 186,526 Societe Generale S.A. 438,975 (438,975 ) — — UBS AG 794,055 (582,692 ) — 211,363 ProShares UltraShort Euro Goldman Sachs International (14,992,024 ) 14,992,024 — — UBS AG (13,718,312 ) 13,718,312 — — ProShares UltraShort Yen Goldman Sachs International (6,470,405 ) 6,470,405 — — UBS AG (7,425,047 ) 7,425,047 — — ProShares Ultra Bloomberg Crude Oil Citibank N.A. (2,509,989 ) 2,509,989 — — Deutsche Bank AG (20,221,872 ) 20,221,872 — — Goldman Sachs International (20,806,119 ) 20,806,119 — — Societe Generale S.A. (6,357,459 ) 6,357,459 — — UBS AG (22,281,150 ) 22,281,150 — — ProShares Ultra Gold Citibank N.A. (4,614 ) — — (4,614 ) Deutsche Bank AG (1,049,383 ) 1,049,383 — — Goldman Sachs International (520,730 ) 520,730 — — Societe Generale S.A. (244,992 ) 244,992 — — UBS AG (430,876 ) 430,876 — — ProShares Ultra Silver Deutsche Bank AG (9,355,945 ) 9,355,945 — — Goldman Sachs International (5,106,853 ) 5,106,853 — — Societe Generale S.A. (2,704,459 ) 2,704,459 — — UBS AG (5,393,844 ) 5,393,844 — — ProShares Ultra Euro Goldman Sachs International 315,354 (315,354 ) — — UBS AG 289,566 (289,566 ) — — ProShares Ultra Yen Goldman Sachs International 169,787 — — 169,787 UBS AG 91,524 — — 91,524

Creation and Redemption of Cr21

Creation and Redemption of Creation Units (Tables)	12 Months Ended
	Dec. 31, 2016
Text Block [Abstract]
Schedule of Transaction Fees	Transaction fees for the years ended December 31, 2016, 2015 and 2014 which are included in the Addition and/or Redemption of Shares on the Statements of Changes in Shareholders’ Equity, were as follows: Fund Year Ended December 31, 2016 Year Ended December 31, 2015 Year Ended December 31, 2014 VIX Short-Term Futures ETF $ 229,699 $ 105,024 $ 72,020 VIX Mid-Term 24,056 8,521 8,927 Short VIX Short-Term Futures ETF 801,564 342,734 218,121 Ultra VIX Short-Term Futures ETF 1,822,247 1,391,292 734,298 UltraShort Bloomberg Crude Oil 398,027 382,054 257,458 UltraShort Bloomberg Natural Gas 8,989 8,853 26,053 UltraShort Gold 29,854 11,024 32,473 UltraShort Silver 16,729 39,354 48,832 Short Euro — — — UltraShort Australian Dollar — — — UltraShort Euro — — — UltraShort Yen — — — Ultra Bloomberg Crude Oil 504,533 847,422 299,493 Ultra Bloomberg Natural Gas 9,175 13,939 30,073 Ultra Gold 14,138 4,218 12,088 Ultra Silver 47,414 38,848 65,208 Ultra Euro — — — Ultra Yen — — — Total Trust* $ 3,906,425 $ 3,193,283 $ 1,805,044 * Amounts exclude the activity of ProShares Ultra Australian Dollar which liquidated on June 29, 2015, ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016.

Financial Highlights (Tables)

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Per Share Operating Performance	Selected data for a Share outstanding throughout the year ended December 31, 2016: For the Year Ended December 31, 2016 Per Share Operating Performance VIX Short- Term Futures VIX Mid- Term Futures ETF Short VIX Short-Term Ultra VIX UltraShort UltraShort Net asset value, at December 31, 2015 $ 66.2109 $ 53.9626 $ 50.8150 $ 702.1025 $ 66.6009 $ 46.5314 Net investment income (loss) (0.2754 ) (0.3333 ) (0.6090 ) (1.9193 ) (0.3600 ) (0.6812 ) Net realized and unrealized gain (loss)# (44.7209 ) (11.4932 ) 41.0242 (656.7016 ) (34.5434 ) (22.7492 ) Change in net asset value from operations (44.9963 ) (11.8265 ) 40.4152 (658.6209 ) (34.9034 ) (23.4304 ) Net asset value, at December 31, 2016 $ 21.2146 $ 42.1361 $ 91.2302 $ 43.4816 $ 31.6975 $ 23.1010 Market value per share, at December 31, 2015† $ 66.65 $ 53.99 $ 50.45 $ 708.75 $ 66.82 $ 46.55 Market value per share, at December 31, 2016† $ 21.26 $ 42.34 $ 90.98 $ 43.75 $ 31.65 $ 23.05 Total Return, at net asset value (68.0 )% (21.9 )% 79.5 % (93.8 )% (52.4 )% (50.4 )% Total Return, at market value (68.1 )% (21.6 )% 80.3 % (93.8 )% (52.6 )% (50.5 )% Ratios to Average Net Assets Expense ratio 0.99 % 0.93 % 1.39 % 1.57 % 1.03 % 1.65 % Expense ratio, excluding brokerage commissions 0.85 % 0.85 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.75 )% (0.68 )% (1.15 )% (1.32 )% (0.76 )% (1.43 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2016 Per Share Operating Performance UltraShort Gold UltraShort Short Euro UltraShort UltraShort Euro UltraShort Yen Net asset value, at December 31, 2015 $ 115.8799 $ 64.5783 $ 43.7767 $ 58.4582 $ 25.5406 $ 87.9389 Net investment income (loss) (0.5542 ) (0.2641 ) (0.3268 ) (0.4268 ) (0.1703 ) (0.4974 ) Net realized and unrealized gain (loss)# (23.9976 ) (27.0070 ) 1.6075 (2.6532 ) 1.7144 (7.1984 ) Change in net asset value from operations (24.5518 ) (27.2711 ) 1.2807 (3.0800 ) 1.5441 (7.6958 ) Net asset value, at December 31, 2016 $ 91.3281 $ 37.3072 $ 45.0574 $ 55.3782 $ 27.0847 $ 80.2431 Market value per share, at December 31, 2015† $ 115.83 $ 64.55 $ 43.74 $ 58.15 $ 25.53 $ 87.89 Market value per share, at December 31, 2016† $ 90.54 $ 38.76 $ 45.12 $ 55.24 $ 27.08 $ 80.25 Total Return, at net asset value (21.2 )% (42.2 )% 2.9 % (5.3 )% 6.0 % (8.8 )% Total Return, at market value (21.8 )% (40.0 )% 3.2 % (5.0 )% 6.1 % (8.7 )% Ratios to Average Net Assets Expense ratio 0.95 % 0.95 % 0.97 % 1.03 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.70 )% (0.70 )% (0.76 )% (0.79 )% (0.70 )% (0.71 )% # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2016 Per Share Operating Performance Ultra Bloomberg Ultra Bloomberg Ultra Gold Ultra Silver Ultra Euro Ultra Yen Net asset value, at December 31, 2015 $ 25.1548 $ 18.5698 $ 29.7295 $ 27.0638 $ 15.5107 $ 54.7527 Net investment income (loss) (0.1534 ) (0.1579 ) (0.2751 ) (0.2717 ) (0.1119 ) (0.4586 ) Net realized and unrealized gain (loss)# (1.6662 ) 0.4364 3.4482 6.6499 (1.3816 ) 1.1321 Change in net asset value from operations (1.8196 ) 0.2785 3.1731 6.3782 (1.4935 ) 0.6735 Net asset value, at December 31, 2016 $ 23.3352 $ 18.8483 $ 32.9026 $ 33.4420 $ 14.0172 $ 55.4262 Market value per share, at December 31, 2015† $ 25.08 $ 18.48 $ 29.73 $ 27.08 $ 15.51 $ 54.70 Market value per share, at December 31, 2016† $ 23.36 $ 18.96 $ 33.20 $ 32.09 $ 14.09 $ 55.52 Total Return, at net asset value (7.2 )% 1.5 % 10.7 % 23.6 % (9.6 )% 1.2 % Total Return, at market value (6.9 )% 2.6 % 11.7 % 18.5 % (9.2 )% 1.5 % Ratios to Average Net Assets Expense ratio 1.01 % 1.34 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.76 )% (1.12 )% (0.69 )% (0.69 )% (0.71 )% (0.69 )% ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. Selected data for a Share outstanding throughout the year ended December 31, 2015: For the Year Ended December 31, 2015 Per Share Operating Performance VIX Short- Term Futures VIX Mid- Term Futures Short VIX Ultra VIX UltraShort UltraShort Net asset value, at December 31, 2014 $ 104.6604 $ 63.6020 $ 61.4004 $ 3,136.4730 $ 38.9895 $ 27.9859 Net investment income (loss) (0.6622 ) (0.5053 ) (0.8162 ) (18.0602 ) (0.3924 ) (0.4438 ) Net realized and unrealized gain (loss)# (37.7873 ) (9.1341 ) (9.7692 ) (2,416.3103 ) 28.0038 18.9893 Change in net asset value from operations (38.4495 ) (9.6394 ) (10.5854 ) (2,434.3705 ) 27.6114 18.5455 Net asset value, at December 31, 2015 $ 66.2109 $ 53.9626 $ 50.8150 $ 702.1025 $ 66.6009 $ 46.5314 Market value per share, at December 31, 2014† $ 104.95 $ 63.89 $ 61.16 $ 3,143.75 $ 38.26 $ 27.34 Market value per share, at December 31, 2015† $ 66.65 $ 53.99 $ 50.45 $ 708.75 $ 66.82 $ 46.55 Total Return, at net asset value (36.7 )% (15.2 )% (17.2 )% (77.6 )% 70.8 % 66.3 % Total Return, at market value (36.5 )% (15.5 )% (17.5 )% (77.5 )% 74.6 % 70.3 % Ratios to Average Net Assets Expense ratio 0.95 % 0.91 % 1.40 % 1.65 % 1.07 % 1.55 % Expense ratio, excluding brokerage commissions 0.85 % 0.85 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.92 )% (0.88 )% (1.36 )% (1.61 )% (1.04 )% (1.50 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2015 Per Share Operating Performance UltraShort Gold UltraShort Short Euro UltraShort UltraShort Euro UltraShort Yen Net asset value, at December 31, 2014 $ 96.6516 $ 57.8071 $ 40.0617 $ 51.3790 $ 21.5946 $ 89.3336 Net investment income (loss) (0.9149 ) (0.4968 ) (0.4096 ) (0.5741 ) (0.2256 ) (0.8243 ) Net realized and unrealized gain (loss)# 20.1432 7.2680 4.1246 7.6533 4.1716 (0.5704 ) Change in net asset value from operations 19.2283 6.7712 3.7150 7.0792 3.9460 (1.3947 ) Net asset value, at December 31, 2015 $ 115.8799 $ 64.5783 $ 43.7767 $ 58.4582 $ 25.5406 $ 87.9389 Market value per share, at December 31, 2014† $ 100.22 $ 59.70 $ 40.03 $ 51.37 $ 21.61 $ 89.30 Market value per share, at December 31, 2015† $ 115.83 $ 64.55 $ 43.74 $ 58.15 $ 25.53 $ 87.89 Total Return, at net asset value 19.9 % 11.7 % 9.3 % 13.8 % 18.3 % (1.6 )% Total Return, at market value 15.6 % 8.1 % 9.3 % 13.2 % 18.1 % (1.6 )% Ratios to Average Net Assets Expense ratio 0.95 % 0.95 % 0.97 % 1.03 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.91 )% (0.91 )% (0.95 )% (1.00 )% (0.90 )% (0.92 )% * See Note 1 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2015 Per Share Operating Performance Ultra Bloomberg Ultra Bloomberg Ultra Gold Ultra Silver Ultra Euro Ultra Yen* Net asset value, at December 31, 2014 $ 101.4800 $ 61.6491 $ 40.0011 $ 39.3657 $ 19.8744 $ 56.4747 Net investment income (loss) (0.5621 ) (0.4982 ) (0.3292 ) (0.3258 ) (0.1505 ) (0.4787 ) Net realized and unrealized gain (loss)# (75.7631 ) (42.5811 ) (9.9424 ) (11.9761 ) (4.2132 ) (1.2433 ) Change in net asset value from operations (76.3252 ) (43.0793 ) (10.2716 ) (12.3019 ) (4.3637 ) (1.7220 ) Net asset value, at December 31, 2015 $ 25.1548 $ 18.5698 $ 29.7295 $ 27.0638 $ 15.5107 $ 54.7527 Market value per share, at December 31, 2014† $ 103.70 $ 63.12 $ 38.41 $ 38.05 $ 19.80 $ 56.48 Market value per share, at December 31, 2015† $ 25.08 $ 18.48 $ 29.73 $ 27.08 $ 15.51 $ 54.70 Total Return, at net asset value (75.2 )% (69.9 )% (25.7 )% (31.3 )% (22.0 )% (3.0 )% Total Return, at market value (75.8 )% (70.7 )% (22.6 )% (28.8 )% (21.7 )% (3.2 )% Ratios to Average Net Assets Expense ratio 1.02 % 1.29 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.98 )% (1.26 )% (0.90 )% (0.89 )% (0.93 )% (0.88 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. Selected data for a Share outstanding throughout the year ended December 31, 2014: For the Year Ended December 31, 2014 Per Share Operating Performance VIX Short- Term Futures VIX Mid- Term Futures Short VIX Short-Term Ultra VIX UltraShort UltraShort Net asset value, at December 31, 2013 $ 142.6934 $ 77.1837 $ 67.4993 $ 8,385.5437 $ 15.8651 $ 23.3212 Net investment income (loss) (1.0237 ) (0.5666 ) (1.0247 ) (72.6365 ) (0.1387 ) (0.1654 ) Net realized and unrealized gain (loss)# (37.0093 ) (13.0151 ) (5.0742 ) (5,176.4342 ) 23.2631 4.8301 Change in net asset value from operations (38.0330 ) (13.5817 ) (6.0989 ) (5,249.0707 ) 23.1244 4.6647 Net asset value, at December 31, 2014 $ 104.6604 $ 63.6020 $ 61.4004 $ 3,136.4730 $ 38.9895 $ 27.9859 Market value per share, at December 31, 2013† $ 142.65 $ 77.16 $ 67.47 $ 8,390.00 $ 15.79 $ 23.12 Market value per share, at December 31, 2014† $ 104.95 $ 63.89 $ 61.16 $ 3,143.75 $ 38.26 $ 27.34 Total Return, at net asset value (26.7 )% (17.6 )% (9.0 )% (62.6 )% 145.8 % 20.0 % Total Return, at market value (26.4 )% (17.2 )% (9.4 )% (62.5 )% 142.3 % 18.3 % Ratios to Average Net Assets Expense ratio 0.92 % 0.87 % 1.49 % 1.80 % 0.98 % 1.18 % Expense ratio, excluding brokerage commissions 0.85 % 0.85 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.88 )% (0.84 )% (1.46 )% (1.78 )% (0.94 )% (1.14 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2014 Per Share Operating Performance UltraShort Gold UltraShort Short Euro UltraShort UltraShort Euro UltraShort Yen Net asset value, at December 31, 2013 $ 103.5180 $ 44.8910 $ 35.5867 $ 46.6384 $ 17.0613 $ 70.8640 Net investment income (loss) (0.8233 ) (0.3937 ) (0.3428 ) (0.4272 ) (0.1642 ) (0.6412 ) Net realized and unrealized gain (loss)# (6.0431 ) 13.3098 4.8178 5.1678 4.6975 19.1108 Change in net asset value from operations (6.8664 ) 12.9161 4.4750 4.7406 4.5333 18.4696 Net asset value, at December 31, 2014 $ 96.6516 $ 57.8071 $ 40.0617 $ 51.3790 $ 21.5946 $ 89.3336 Market value per share, at December 31, 2013† $ 103.53 $ 45.10 $ 35.66 $ 46.66 $ 17.06 $ 70.91 Market value per share, at December 31, 2014† $ 100.22 $ 59.70 $ 40.03 $ 51.37 $ 21.61 $ 89.30 Total Return, at net asset value (6.6 )% 28.8 % 12.6 % 10.2 % 26.6 % 26.1 % Total Return, at market value (3.2 )% 32.4 % 12.3 % 10.1 % 26.7 % 25.9 % Ratios to Average Net Assets Expense ratio 0.95 % 0.95 % 0.96 % 1.01 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.91 )% (0.90 )% (0.93 )% (0.97 )% (0.90 )% (0.90 )% * See Note 1 of these Notes for Financial Statements. # Percentages The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated. For the Year Ended December 31, 2014 Per Share Operating Performance Ultra Bloomberg Ultra Bloomberg Ultra Gold Ultra Silver Ultra Euro Ultra Yen* Net asset value, at December 31, 2013 $ 320.8990 $ 155.3534 $ 41.2553 $ 63.3305 $ 26.0346 $ 74.5261 Net investment income (loss) (2.1856 ) (1.5167 ) (0.4078 ) (0.5348 ) (0.2185 ) (0.6693 ) Net realized and unrealized gain (loss)# (217.2334 ) (92.1876 ) (0.8464 ) (23.4300 ) (5.9417 ) (17.3821 ) Change in net asset value from operations (219.4190 ) (93.7043 ) (1.2542 ) (23.9648 ) (6.1602 ) (18.0514 ) Net asset value, at December 31, 2014 $ 101.4800 $ 61.6491 $ 40.0011 $ 39.3657 $ 19.8744 $ 56.4747 Market value per share, at December 31, 2013† $ 322.20 $ 157.12 $ 41.26 $ 63.04 $ 25.98 $ 74.44 Market value per share, at December 31, 2014† $ 103.70 $ 63.12 $ 38.41 $ 38.05 $ 19.80 $ 56.48 Total Return, at net asset value (68.4 )% (60.3 )% (3.0 )% (37.8 )% (23.7 )% (24.2 )% Total Return, at market value (67.8 )% (59.8 )% (6.9 )% (39.6 )% (23.8 )% (24.1 )% Ratios to Average Net Assets Expense ratio 0.99 % 1.13 % 0.95 % 0.95 % 0.95 % 0.95 % Expense ratio, excluding brokerage commissions 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % 0.95 % Net investment income (loss) (0.95 )% (1.10 )% (0.91 )% (0.91 )% (0.91 )% (0.90 )% * See Note 1 of these Notes for Financial Statements. ^ See Note 9 of these Notes for Financial Statements. # The amount shown for a share outstanding throughout the period may not accord with the change in aggregate gains and losses during the period because of timing of creation and redemption units in relation to fluctuating net asset value during the period. † Market values are determined at the close of the New York Stock Exchange, which may be later than when the Funds’ net asset value is calculated.

Schedule of Investments - Short

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Detail) - USD ($)		Dec. 31, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		$ 3,038,848,441	$ 3,313,591,600
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		147,991,233	96,073,659
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.382% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	39,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	38,996,151
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.330% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	9,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	8,998,340
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.353% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	15,500,000
Total short-term U.S. government and agency obligations, value	[1],[2]	15,495,891
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.409% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	32,560,000
Total short-term U.S. government and agency obligations, value	[1],[2]	32,548,741
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.425% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	5,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	4,997,739
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.390% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	10,000,000
Total short-term U.S. government and agency obligations, value	[2]	9,994,561
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	37,000,000
Total short-term U.S. government and agency obligations, value	[2]	36,959,810
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.087% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		5,167,000
Total short-term U.S. government and agency obligations, value	[2]		5,166,983
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		4,768,000
Total short-term U.S. government and agency obligations, value	[2]		4,767,587
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.007% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		44,408,000
Total short-term U.S. government and agency obligations, value	[2]		44,404,749
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		6,625,000
Total short-term U.S. government and agency obligations, value	[2]		6,624,282
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.190% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,943,000
Total short-term U.S. government and agency obligations, value	[2]		2,942,542
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.070% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,214,000
Total short-term U.S. government and agency obligations, value	[2]		2,213,533
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.201% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		14,428,000
Total short-term U.S. government and agency obligations, value	[1],[2]		14,425,221
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.060% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		5,088,000
Total short-term U.S. government and agency obligations, value	[1],[2]		5,085,965
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.366% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		10,459,000
Total short-term U.S. government and agency obligations, value	[1],[2]		10,442,797
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		45,486,235	25,976,287
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.390% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	6,000,000
Total short-term U.S. government and agency obligations, value	[2]	5,996,737
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,778,000
Total short-term U.S. government and agency obligations, value	[2]		1,777,808
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.281% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,500,000
Total short-term U.S. government and agency obligations, value	[2]	1,499,968
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.390% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	18,500,000
Total short-term U.S. government and agency obligations, value	[2]	18,498,174
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.299% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	2,000,000
Total short-term U.S. government and agency obligations, value	[2]	1,999,631
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.311% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,500,000
Total short-term U.S. government and agency obligations, value	[2]	1,499,602
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.411% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	2,000,000
Total short-term U.S. government and agency obligations, value	[2]	1,999,308
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.372% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	10,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	9,995,478
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	4,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	3,997,337
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.019% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		15,119,000
Total short-term U.S. government and agency obligations, value	[2]		15,117,893
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.209% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		9,082,000
Total short-term U.S. government and agency obligations, value	[1],[2]		9,080,586
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		170,396,436	535,392,718
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	28,000,000
Total short-term U.S. government and agency obligations, value	[2]	27,969,586
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		22,342,000
Total short-term U.S. government and agency obligations, value	[2]		22,340,063
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		10,901,000
Total short-term U.S. government and agency obligations, value	[2]		10,899,819
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.471% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	47,500,000
Total short-term U.S. government and agency obligations, value	[2]	47,478,520
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.437% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	95,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	94,948,330
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.065% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		44,561,000
Total short-term U.S. government and agency obligations, value	[2]		44,560,853
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.053% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		13,600,000
Total short-term U.S. government and agency obligations, value	[2]		13,599,660
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		10,817,000
Total short-term U.S. government and agency obligations, value	[2]		10,816,540
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.035% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		36,091,000
Total short-term U.S. government and agency obligations, value	[2]		36,088,358
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		85,348,000
Total short-term U.S. government and agency obligations, value	[2]		85,336,743
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		63,916,000
Total short-term U.S. government and agency obligations, value	[2]		63,906,048
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.194% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		74,289,000
Total short-term U.S. government and agency obligations, value	[2]		74,274,692
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.206% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		35,842,000
Total short-term U.S. government and agency obligations, value	[2]		35,827,663
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.364% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		137,956,000
Total short-term U.S. government and agency obligations, value	[1],[2]		137,742,279
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		434,671,795	438,357,849
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	3,000,000
Total short-term U.S. government and agency obligations, value	[2]	2,996,741
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.366% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		77,557,000
Total short-term U.S. government and agency obligations, value	[1],[2]		77,436,849
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	8,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	7,994,674
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,327,000
Total short-term U.S. government and agency obligations, value	[2]		1,326,944
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.294% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	20,161,000
Total short-term U.S. government and agency obligations, value	[2]	20,160,569
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.307% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	68,063,000
Total short-term U.S. government and agency obligations, value	[2]	68,056,282
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.336% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	62,500,000
Total short-term U.S. government and agency obligations, value	[1],[2]	62,488,475
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.319% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	66,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	65,982,504
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.342% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	60,092,000
Total short-term U.S. government and agency obligations, value	[1],[2]	60,071,220
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.442% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	14,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	13,993,669
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.435% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]	133,000,000
Total short-term U.S. government and agency obligations, value	[1],[2]	132,927,661
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,000,000
Total short-term U.S. government and agency obligations, value	[2]		999,997
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		9,071,000
Total short-term U.S. government and agency obligations, value	[2]		9,070,773
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.055% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		3,000,000
Total short-term U.S. government and agency obligations, value	[2]		2,999,740
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.130% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,385,000
Total short-term U.S. government and agency obligations, value	[2]		2,384,825
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.150% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		15,718,000
Total short-term U.S. government and agency obligations, value	[2]		15,715,927
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.129% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		8,386,000
Total short-term U.S. government and agency obligations, value	[2]		8,384,795
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.125% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		62,257,000
Total short-term U.S. government and agency obligations, value	[2]		62,250,257
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.181% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		71,491,000
Total short-term U.S. government and agency obligations, value	[2]		71,479,869
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.066% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		62,525,000
Total short-term U.S. government and agency obligations, value	[1],[2]		62,511,820
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.207% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		94,427,000
Total short-term U.S. government and agency obligations, value	[1],[2]		94,408,813
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.101% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		29,399,000
Total short-term U.S. government and agency obligations, value	[1],[2]		29,387,240
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		205,694,385	79,692,642
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.390% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	11,000,000
Total short-term U.S. government and agency obligations, value	[2]	10,994,017
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]	3,000,000
Total short-term U.S. government and agency obligations, value	[2],[3]	2,996,741
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]		14,974,000
Total short-term U.S. government and agency obligations, value	[2],[3]		14,972,378
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.080% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		3,329,000
Total short-term U.S. government and agency obligations, value	[2]		3,328,989
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.020% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		21,612,000
Total short-term U.S. government and agency obligations, value	[2]		21,611,082
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.026% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		5,980,000
Total short-term U.S. government and agency obligations, value	[2]		5,979,562
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.180% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]		5,106,000
Total short-term U.S. government and agency obligations, value	[2],[3]		5,105,266
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]		2,835,000
Total short-term U.S. government and agency obligations, value	[2],[3]		2,834,403
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.172% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]		2,372,000
Total short-term U.S. government and agency obligations, value	[2],[3]		2,371,543
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.176% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]		14,653,000
Total short-term U.S. government and agency obligations, value	[2],[3]		14,647,139
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]		8,856,000
Total short-term U.S. government and agency obligations, value	[2],[3]		8,842,280
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.281% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]	14,476,000
Total short-term U.S. government and agency obligations, value	[2],[3]	14,475,690
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.353% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]	56,495,000
Total short-term U.S. government and agency obligations, value	[2],[3]	56,489,424
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.344% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]	38,000,000
Total short-term U.S. government and agency obligations, value	[2],[3]	37,992,993
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.395% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]	13,300,000
Total short-term U.S. government and agency obligations, value	[2],[3]	13,296,474
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.406% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	5,500,000
Total short-term U.S. government and agency obligations, value	[2]	5,498,098
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.441% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]	9,000,000
Total short-term U.S. government and agency obligations, value	[2],[3]	8,995,930
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.458% Due 03/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]	50,000,000
Total short-term U.S. government and agency obligations, value	[2],[3]	49,960,930
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.516% Due 03/30/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[3]	5,000,000
Total short-term U.S. government and agency obligations, value	[2],[3]	4,994,088
ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		2,899,151	8,115,004
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.406% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,000,000
Total short-term U.S. government and agency obligations, value	[2]	999,654
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.233% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		814,000
Total short-term U.S. government and agency obligations, value	[2]		813,843
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.185% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,294,000
Total short-term U.S. government and agency obligations, value	[2]		1,293,482
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.386% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		6,017,000
Total short-term U.S. government and agency obligations, value	[2]		6,007,679
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.343% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,900,000
Total short-term U.S. government and agency obligations, value	[2]	1,899,497
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		60,540,555	72,979,905
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	2,000,000
Total short-term U.S. government and agency obligations, value	[2]	1,997,828
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		10,734,000
Total short-term U.S. government and agency obligations, value	[2],[4]		10,732,837
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.070% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		4,806,000
Total short-term U.S. government and agency obligations, value	[2],[4]		4,804,987
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	5,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	4,996,671
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		4,870,000
Total short-term U.S. government and agency obligations, value	[2],[4]		4,862,455
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.135% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		10,805,000
Total short-term U.S. government and agency obligations, value	[2],[4]		10,804,964
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.040% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		30,298,000
Total short-term U.S. government and agency obligations, value	[2],[4]		30,297,243
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.043% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		6,940,000
Total short-term U.S. government and agency obligations, value	[2],[4]		6,939,705
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.210% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,742,000
Total short-term U.S. government and agency obligations, value	[2]		1,741,729
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.181% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		500,000
Total short-term U.S. government and agency obligations, value	[2],[4]		499,904
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.203% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		2,297,000
Total short-term U.S. government and agency obligations, value	[2],[4]		2,296,081
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.435% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,572,000
Total short-term U.S. government and agency obligations, value	[2]	1,571,845
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.308% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	1,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	999,815
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.371% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	10,000,000
Total short-term U.S. government and agency obligations, value	[2]	9,997,349
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.407% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	13,000,000
Total short-term U.S. government and agency obligations, value	[2]	12,995,504
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.406% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	18,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	17,990,210
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.481% Due 03/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	10,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	9,991,333
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		21,550,319	50,730,230
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.409% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,300,000
Total short-term U.S. government and agency obligations, value	[2]	1,299,551
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	2,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	1,997,828
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		4,001,000
Total short-term U.S. government and agency obligations, value	[2],[4]		4,000,567
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	2,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	1,998,668
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.055% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,000,000
Total short-term U.S. government and agency obligations, value	[2]		999,913
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.386% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		2,281,000
Total short-term U.S. government and agency obligations, value	[2],[4]		2,277,466
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.135% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		8,744,000
Total short-term U.S. government and agency obligations, value	[2],[4]		8,743,971
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.043% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,641,000
Total short-term U.S. government and agency obligations, value	[2]		1,640,930
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.181% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		4,573,000
Total short-term U.S. government and agency obligations, value	[2],[4]		4,572,119
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.371% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,000,000
Total short-term U.S. government and agency obligations, value	[2]	999,735
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.000% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		1,982,000
Total short-term U.S. government and agency obligations, value	[2],[4]		1,981,739
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.138% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		8,323,000
Total short-term U.S. government and agency obligations, value	[2],[4]		8,321,804
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.163% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		18,199,000
Total short-term U.S. government and agency obligations, value	[2],[4]		18,191,721
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.339% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	5,759,000
Total short-term U.S. government and agency obligations, value	[2],[4]	5,758,432
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.455% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,500,000
Total short-term U.S. government and agency obligations, value	[2]	1,499,723
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.452% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	8,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	7,996,382
ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		13,164,828	15,153,211
ProShares Short Euro [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,962,000
Total short-term U.S. government and agency obligations, value	[2]		2,961,679
ProShares Short Euro [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	3,000,000
Total short-term U.S. government and agency obligations, value	[2]	2,998,003
ProShares Short Euro [Member] | U.S. Treasury Bills 0.000% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		5,605,000
Total short-term U.S. government and agency obligations, value	[2]		5,604,982
ProShares Short Euro [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,635,000
Total short-term U.S. government and agency obligations, value	[2]		1,634,655
ProShares Short Euro [Member] | U.S. Treasury Bills 0.181% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		200,000
Total short-term U.S. government and agency obligations, value	[2]		199,961
ProShares Short Euro [Member] | U.S. Treasury Bills 0.203% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,198,000
Total short-term U.S. government and agency obligations, value	[2]		2,197,121
ProShares Short Euro [Member] | U.S. Treasury Bills 0.027% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,555,000
Total short-term U.S. government and agency obligations, value	[2]		2,554,813
ProShares Short Euro [Member] | U.S. Treasury Bills 0.270% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	8,168,000
Total short-term U.S. government and agency obligations, value	[2]	8,167,194
ProShares Short Euro [Member] | U.S. Treasury Bills 0.355% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	2,000,000
Total short-term U.S. government and agency obligations, value	[2]	1,999,631
ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		12,909,619	18,408,894
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		415,000
Total short-term U.S. government and agency obligations, value	[2]		414,955
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.048% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,538,000
Total short-term U.S. government and agency obligations, value	[2]		2,537,814
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.151% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		1,267,000
Total short-term U.S. government and agency obligations, value	[1],[2]		1,266,803
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.156% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[1],[2]		14,195,000
Total short-term U.S. government and agency obligations, value	[1],[2]		14,189,322
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.326% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	12,912,000
Total short-term U.S. government and agency obligations, value	[2]	12,909,619
ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		337,375,787	546,166,776
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.390% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	33,000,000
Total short-term U.S. government and agency obligations, value	[2]	32,982,051
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	45,000,000
Total short-term U.S. government and agency obligations, value	[2],[5]	44,951,121
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		21,719,000
Total short-term U.S. government and agency obligations, value	[2],[5]		21,716,648
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	45,000,000
Total short-term U.S. government and agency obligations, value	[2],[5]	44,970,039
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		44,995,000
Total short-term U.S. government and agency obligations, value	[2]		44,993,088
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.150% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		29,669,000
Total short-term U.S. government and agency obligations, value	[2]		29,665,087
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.180% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		7,296,000
Total short-term U.S. government and agency obligations, value	[2]		7,294,952
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		88,841,000
Total short-term U.S. government and agency obligations, value	[2],[5]		88,703,367
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.027% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		98,693,000
Total short-term U.S. government and agency obligations, value	[2],[5]		98,685,776
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.286% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]	35,000,000
Total short-term U.S. government and agency obligations, value	[2],[5]	34,999,251
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.421% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]	39,020,000
Total short-term U.S. government and agency obligations, value	[2],[5]	39,016,149
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.342% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	4,000,000
Total short-term U.S. government and agency obligations, value	[2]	3,999,263
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.350% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	68,000,000
Total short-term U.S. government and agency obligations, value	[2]	67,981,973
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.391% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	65,000,000
Total short-term U.S. government and agency obligations, value	[2],[5]	64,977,523
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.471% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	3,500,000
Total short-term U.S. government and agency obligations, value	[2],[5]	3,498,417
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.133% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		67,289,000
Total short-term U.S. government and agency obligations, value	[2]		67,283,166
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.167% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		44,405,000
Total short-term U.S. government and agency obligations, value	[2],[5]		44,398,086
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.175% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		143,484,000
Total short-term U.S. government and agency obligations, value	[2],[5]		143,426,606
ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		257,102,313	259,997,001
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		142,667,000
Total short-term U.S. government and agency obligations, value	[2],[5]		142,651,549
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.366% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		10,194,000
Total short-term U.S. government and agency obligations, value	[2],[5]		10,178,208
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	15,900,000
Total short-term U.S. government and agency obligations, value	[2],[5]	15,889,414
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		8,000,000
Total short-term U.S. government and agency obligations, value	[2]		7,998,754
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.150% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		9,617,000
Total short-term U.S. government and agency obligations, value	[2]		9,615,732
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.080% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		4,417,000
Total short-term U.S. government and agency obligations, value	[2]		4,416,985
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.043% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		5,361,000
Total short-term U.S. government and agency obligations, value	[2]		5,360,772
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.181% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		800,000
Total short-term U.S. government and agency obligations, value	[2],[5]		799,846
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.452% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	35,000,000
Total short-term U.S. government and agency obligations, value	[2],[5]	34,984,173
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.286% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	21,383,000
Total short-term U.S. government and agency obligations, value	[2],[5]	21,382,543
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.148% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		6,017,000
Total short-term U.S. government and agency obligations, value	[2]		6,016,850
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.110% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		6,089,000
Total short-term U.S. government and agency obligations, value	[2]		6,088,472
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.013% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		38,515,000
Total short-term U.S. government and agency obligations, value	[2]		38,512,181
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.152% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		28,369,000
Total short-term U.S. government and agency obligations, value	[2],[5]		28,357,652
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.343% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	32,400,000
Total short-term U.S. government and agency obligations, value	[2],[5]	32,396,802
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.405% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	12,500,000
Total short-term U.S. government and agency obligations, value	[2],[5]	12,497,695
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.346% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	57,000,000
Total short-term U.S. government and agency obligations, value	[2],[5]	56,984,889
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.390% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	30,006,000
Total short-term U.S. government and agency obligations, value	[2],[5]	29,995,624
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.393% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	53,000,000
Total short-term U.S. government and agency obligations, value	[2]	52,971,173
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		885,050,007	797,650,543
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]	12,000,000
Total short-term U.S. government and agency obligations, value	[6]	11,986,966
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.087% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7]		55,485,000
Total short-term U.S. government and agency obligations, value	[7]		55,484,817
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	20,000,000
Total short-term U.S. government and agency obligations, value	[6],[8]	19,986,684
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		25,596,000
Total short-term U.S. government and agency obligations, value	[7],[8]		25,590,604
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.040% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7]		18,803,000
Total short-term U.S. government and agency obligations, value	[7]		18,802,530
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.270% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	113,636,000
Total short-term U.S. government and agency obligations, value	[6],[8]	113,624,784
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.289% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	144,500,000
Total short-term U.S. government and agency obligations, value	[6],[8]	144,496,908
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.371% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	48,500,000
Total short-term U.S. government and agency obligations, value	[6],[8]	48,491,057
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.362% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	106,000,000
Total short-term U.S. government and agency obligations, value	[6],[8]	105,971,899
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.418% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	105,749,000
Total short-term U.S. government and agency obligations, value	[6],[8]	105,712,432
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.400% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	108,000,000
Total short-term U.S. government and agency obligations, value	[6],[8]	107,951,162
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.420% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	77,000,000
Total short-term U.S. government and agency obligations, value	[6],[8]	76,958,120
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.481% Due 03/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]	150,000,000
Total short-term U.S. government and agency obligations, value	[6],[8]	149,869,995
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.001% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7]		6,843,000
Total short-term U.S. government and agency obligations, value	[7]		6,842,709
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.094% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		91,564,000
Total short-term U.S. government and agency obligations, value	[7],[8]		91,556,061
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.025% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7]		80,508,000
Total short-term U.S. government and agency obligations, value	[7]		80,502,107
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.005% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		74,430,000
Total short-term U.S. government and agency obligations, value	[7],[8]		74,420,183
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.119% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		68,546,000
Total short-term U.S. government and agency obligations, value	[7],[8]		68,536,150
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.013% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		38,009,000
Total short-term U.S. government and agency obligations, value	[7],[8]		38,004,884
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.202% Due 03/03/16[Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		86,544,000
Total short-term U.S. government and agency obligations, value	[7],[8]		86,530,525
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.147% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		73,235,000
Total short-term U.S. government and agency obligations, value	[7],[8]		73,220,895
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.178% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		44,753,000
Total short-term U.S. government and agency obligations, value	[7],[8]		44,735,099
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.356% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[7],[8]		133,631,000
Total short-term U.S. government and agency obligations, value	[7],[8]		133,423,979
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		36,183,648	26,807,731
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]	3,000,000
Total short-term U.S. government and agency obligations, value	[9]	2,996,741
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]		861,000
Total short-term U.S. government and agency obligations, value	[9]		860,925
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]		588,000
Total short-term U.S. government and agency obligations, value	[9]		587,936
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.311% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]	3,000,000
Total short-term U.S. government and agency obligations, value	[9]	2,999,205
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]	2,000,000
Total short-term U.S. government and agency obligations, value	[9]	1,998,668
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.035% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]		1,316,000
Total short-term U.S. government and agency obligations, value	[9]		1,315,904
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.080% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]		1,137,000
Total short-term U.S. government and agency obligations, value	[9]		1,136,996
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]		1,823,000
Total short-term U.S. government and agency obligations, value	[9]		1,822,616
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.435% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]	1,200,000
Total short-term U.S. government and agency obligations, value	[9]	1,199,882
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.151% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]		3,234,000
Total short-term U.S. government and agency obligations, value	[9]		3,233,497
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.345% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]	8,000,000
Total short-term U.S. government and agency obligations, value	[9]	7,998,525
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.403% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]	3,000,000
Total short-term U.S. government and agency obligations, value	[9]	2,998,963
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.425% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]	4,000,000
Total short-term U.S. government and agency obligations, value	[9]	3,998,191
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.440% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]	12,000,000
Total short-term U.S. government and agency obligations, value	[9]	11,993,473
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.186% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[9]		17,857,000
Total short-term U.S. government and agency obligations, value	[9]		17,849,857
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		95,356,621	71,912,587
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		2,659,000
Total short-term U.S. government and agency obligations, value	[2],[4]		2,658,712
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	4,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	3,997,337
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		22,780,000
Total short-term U.S. government and agency obligations, value	[2]		22,776,453
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		7,749,000
Total short-term U.S. government and agency obligations, value	[2],[4]		7,736,995
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.135% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		7,778,000
Total short-term U.S. government and agency obligations, value	[2],[4]		7,777,974
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.355% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	4,395,000
Total short-term U.S. government and agency obligations, value	[2],[4]	4,394,189
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.110% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		9,751,000
Total short-term U.S. government and agency obligations, value	[2]		9,750,155
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.393% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	11,006,000
Total short-term U.S. government and agency obligations, value	[2],[4]	11,000,014
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.000% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		1,484,000
Total short-term U.S. government and agency obligations, value	[2],[4]		1,483,891
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.240% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,450,000
Total short-term U.S. government and agency obligations, value	[2]		1,449,721
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.184% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		18,286,000
Total short-term U.S. government and agency obligations, value	[2],[4]		18,278,686
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.318% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	5,340,000
Total short-term U.S. government and agency obligations, value	[2],[4]	5,339,886
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.276% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	15,564,000
Total short-term U.S. government and agency obligations, value	[2],[4]	15,562,464
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.360% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	22,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	21,994,168
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.406% Due 02/02/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	6,100,000
Total short-term U.S. government and agency obligations, value	[2],[4]	6,097,891
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	27,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	26,970,672
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		295,300,799	238,899,626
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	18,000,000
Total short-term U.S. government and agency obligations, value	[2]	17,980,448
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		41,656,000
Total short-term U.S. government and agency obligations, value	[2],[4]		41,651,489
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.491% Due 02/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	6,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	5,996,005
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,873,000
Total short-term U.S. government and agency obligations, value	[2]		2,872,394
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.135% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		19,913,000
Total short-term U.S. government and agency obligations, value	[2],[4]		19,912,934
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.040% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		17,050,000
Total short-term U.S. government and agency obligations, value	[2]		17,049,574
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.371% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	2,000,000
Total short-term U.S. government and agency obligations, value	[2]	1,999,470
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.001% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		34,041,000
Total short-term U.S. government and agency obligations, value	[2],[4]		34,039,553
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.356% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		20,284,000
Total short-term U.S. government and agency obligations, value	[2],[4]		20,252,576
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.318% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	52,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	51,998,887
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.039% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		29,869,000
Total short-term U.S. government and agency obligations, value	[2],[4]		29,866,814
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.115% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,811,000
Total short-term U.S. government and agency obligations, value	[2]		2,810,596
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.199% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		40,444,000
Total short-term U.S. government and agency obligations, value	[2],[4]		40,437,703
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.180% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]		30,018,000
Total short-term U.S. government and agency obligations, value	[2],[4]		30,005,993
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.354% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	68,895,000
Total short-term U.S. government and agency obligations, value	[2],[4]	68,888,200
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.339% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	27,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	26,995,021
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.394% Due 02/02/17 [December]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	9,500,000
Total short-term U.S. government and agency obligations, value	[2],[4]	9,496,715
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.452% Due 02/09/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	76,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	75,965,633
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.423% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[4]	36,000,000
Total short-term U.S. government and agency obligations, value	[2],[4]	35,980,420
ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		11,891,831	11,605,262
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.493% Due 03/23/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	8,000,000
Total short-term U.S. government and agency obligations, value	[2]	7,991,310
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.299% Due 01/19/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	2,000,000
Total short-term U.S. government and agency obligations, value	[2],[5]	1,999,631
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		7,404,000
Total short-term U.S. government and agency obligations, value	[2],[5]		7,403,685
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.035% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		790,000
Total short-term U.S. government and agency obligations, value	[2]		789,942
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.270% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	901,000
Total short-term U.S. government and agency obligations, value	[2]	900,911
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.166% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		3,413,000
Total short-term U.S. government and agency obligations, value	[2],[5]		3,411,635
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.295% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	1,000,000
Total short-term U.S. government and agency obligations, value	[2],[5]	999,979
ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, value		5,282,879	5,069,491
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.390% Due 02/16/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	3,000,000
Total short-term U.S. government and agency obligations, value	[2]	2,998,368
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]		3,811,000
Total short-term U.S. government and agency obligations, value	[2],[5]		3,810,670
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		360,000
Total short-term U.S. government and agency obligations, value	[2]		359,961
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.311% Due 01/26/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	1,655,000
Total short-term U.S. government and agency obligations, value	[2],[5]	1,654,561
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		899,000
Total short-term U.S. government and agency obligations, value	[2]		$ 898,860
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.270% Due 01/12/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	480,000
Total short-term U.S. government and agency obligations, value	[2]	479,953
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.210% Due 01/05/17 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2],[5]	150,000
Total short-term U.S. government and agency obligations, value	[2],[5]	$ 149,997
[1]	All or partial amount pledged as collateral for futures contracts.
[2]	Rates shown represents discount rate at the time of purchase.
[3]	All or partial amount pledged as collateral for swap agreements and/or futures contracts.
[4]	All or partial amount pledged as collateral for forward agreements and/or futures contracts.
[5]	All or partial amount pledged as collateral for foreign currency forward contracts.
[6]	Rates shown represents discount rate at the time of purchase.
[7]	Rates shown represents discount rate at the time of the purchase.
[8]	All or partial amount pledged as collateral for swap agreements and/or futures contracts.
[9]	Rates shown represents discount rate at the time of the purchase.

Schedule of Investments - Sho24

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, cost		$ 3,038,837,465	$ 3,313,585,456
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		85.00%	91.00%
Total short-term U.S. government and agency obligations, cost		$ 147,990,045	$ 96,075,481
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		99.00%	94.00%
Total short-term U.S. government and agency obligations, cost		$ 45,486,489	$ 25,975,462
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		75.00%	83.00%
Total short-term U.S. government and agency obligations, cost		$ 170,391,741	$ 535,381,199
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		84.00%	80.00%
Total short-term U.S. government and agency obligations, cost		$ 434,676,067	$ 438,333,277
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		102.00%	83.00%
Total short-term U.S. government and agency obligations, cost		$ 205,694,828	$ 79,694,797
ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		72.00%	78.00%
Total short-term U.S. government and agency obligations, cost		$ 2,899,188	$ 8,114,653
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		95.00%	97.00%
Total short-term U.S. government and agency obligations, cost		$ 60,540,275	$ 72,981,653
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		94.00%	91.00%
Total short-term U.S. government and agency obligations, cost		$ 21,549,766	$ 50,730,044
ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		83.00%	87.00%
Total short-term U.S. government and agency obligations, cost		$ 13,164,807	$ 15,153,202
ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		78.00%	90.00%
Total short-term U.S. government and agency obligations, cost		$ 12,909,895	$ 18,409,449
ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		97.00%	105.00%
Total short-term U.S. government and agency obligations, cost		$ 337,373,566	$ 546,177,230
ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		93.00%	110.00%
Total short-term U.S. government and agency obligations, cost		$ 257,103,135	$ 260,014,650
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		95.00%	102.00%
Total short-term U.S. government and agency obligations, cost		$ 885,046,303	$ 797,652,302
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		84.00%	69.00%
Total short-term U.S. government and agency obligations, cost		$ 36,183,384	$ 26,806,648
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		104.00%	103.00%
Total short-term U.S. government and agency obligations, cost		$ 95,356,703	$ 71,908,280
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		107.00%	110.00%
Total short-term U.S. government and agency obligations, cost		$ 295,296,440	$ 238,900,176
ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		100.00%	107.00%
Total short-term U.S. government and agency obligations, cost		$ 11,891,729	$ 11,605,665
ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		95.00%	93.00%
Total short-term U.S. government and agency obligations, cost		$ 5,283,104	$ 5,069,206
U.S. Treasury Bills 0.382% Due 01/12/17 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.382%
Debt instrument, maturity date	[1],[2]	Jan. 12, 2017
U.S. Treasury Bills 0.330% Due 01/19/17 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.33%
Debt instrument, maturity date	[1],[2]	Jan. 19, 2017
U.S. Treasury Bills 0.353% Due 01/26/17 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.353%
Debt instrument, maturity date	[1],[2]	Jan. 26, 2017
U.S. Treasury Bills 0.409% Due 02/02/17 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.409%
Debt instrument, maturity date	[1],[2]	Feb. 2, 2017
U.S. Treasury Bills 0.409% Due 02/02/17 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.409%
Debt instrument, maturity date	[2]	Feb. 2, 2017
U.S. Treasury Bills 0.425% Due 02/09/17 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.425%
Debt instrument, maturity date	[1],[2]	Feb. 9, 2017
U.S. Treasury Bills 0.390% Due 02/16/17 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.39%
Debt instrument, maturity date	[2]	Feb. 16, 2017
U.S. Treasury Bills 0.390% Due 02/16/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.39%
Debt instrument, maturity date	[2]	Feb. 16, 2017
U.S. Treasury Bills 0.390% Due 02/16/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.39%
Debt instrument, maturity date	[2]	Feb. 16, 2017
U.S. Treasury Bills 0.390% Due 02/16/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.39%
Debt instrument, maturity date	[2]	Feb. 16, 2017
U.S. Treasury Bills 0.390% Due 02/16/17 [Member] | ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.39%
Debt instrument, maturity date	[2]	Feb. 16, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.493%
Debt instrument, maturity date	[2]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.493%
Debt instrument, maturity date	[2]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.493%
Debt instrument, maturity date	[2]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]	0.493%
Debt instrument, maturity date	[2],[3]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.493%
Debt instrument, maturity date	[2]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.493%
Debt instrument, maturity date	[2],[4]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.493%
Debt instrument, maturity date	[2],[5]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.493%
Debt instrument, maturity date	[6]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.493%
Debt instrument, maturity date	[7]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.493%
Debt instrument, maturity date	[2]	Mar. 23, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.493%
Debt instrument, maturity date	[2]	Feb. 23, 2017
U.S. Treasury Bills 0.087% Due 01/07/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.087%
Debt instrument, maturity date	[2]		Jan. 7, 2016
U.S. Treasury Bills 0.087% Due 01/07/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8]		0.087%
Debt instrument, maturity date	[8]		Jan. 6, 2016
U.S. Treasury Bills 0.165% Due 01/28/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.165%
Debt instrument, maturity date	[2]		Jan. 28, 2016
U.S. Treasury Bills 0.165% Due 01/28/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.165%
Debt instrument, maturity date	[2]		Jan. 28, 2016
U.S. Treasury Bills 0.165% Due 01/28/16 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.165%
Debt instrument, maturity date	[7]		Jan. 28, 2016
U.S. Treasury Bills 0.165% Due 01/28/16 [Member] | ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.165%
Debt instrument, maturity date	[2],[5]		Jan. 28, 2016
U.S. Treasury Bills 0.007% Due 02/04/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.007%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]		0.00%
Debt instrument, maturity date	[2],[3]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.00%
Debt instrument, maturity date	[2],[4]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.00%
Debt instrument, maturity date	[2],[4]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.00%
Debt instrument, maturity date	[2],[5]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.00%
Debt instrument, maturity date	[2],[5]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.00%
Debt instrument, maturity date	[7]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.00%
Debt instrument, maturity date	[2],[4]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.00%
Debt instrument, maturity date	[2],[4]		Feb. 25, 2016
U.S. Treasury Bills 0.000% Due 02/25/16 [Member] | ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Feb. 25, 2016
U.S. Treasury Bills 0.190% Due 03/03/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.19%
Debt instrument, maturity date	[2]		Mar. 3, 2016
U.S. Treasury Bills 0.070% Due 03/10/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.07%
Debt instrument, maturity date	[2]		Mar. 10, 2016
U.S. Treasury Bills 0.070% Due 03/10/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.07%
Debt instrument, maturity date	[2],[4]		Mar. 10, 2016
U.S. Treasury Bills 0.201% Due 03/17/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.201%
Debt instrument, maturity date	[1],[2]		Mar. 17, 2016
U.S. Treasury Bills 0.060% Due 03/24/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.06%
Debt instrument, maturity date	[1],[2]		Mar. 24, 2016
U.S. Treasury Bills 0.366% Due 05/26/16 [Member] | ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.366%
Debt instrument, maturity date	[1],[2]		May 26, 2016
U.S. Treasury Bills 0.366% Due 05/26/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.366%
Debt instrument, maturity date	[1],[2]		May 26, 2016
U.S. Treasury Bills 0.366% Due 05/26/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.366%
Debt instrument, maturity date	[2],[5]		May 26, 2016
U.S. Treasury Bills 0.281% Due 01/05/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.281%
Debt instrument, maturity date	[2]	Jan. 5, 2017
U.S. Treasury Bills 0.390% Due 01/12/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.39%
Debt instrument, maturity date	[2]	Jan. 12, 2017
U.S. Treasury Bills 0.299% Due 01/19/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.299%
Debt instrument, maturity date	[2]	Jan. 19, 2017
U.S. Treasury Bills 0.299% Due 01/19/17 [Member] | ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.299%
Debt instrument, maturity date	[2],[5]	Jan. 19, 2017
U.S. Treasury Bills 0.311% Due 01/26/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.311%
Debt instrument, maturity date	[2]	Jan. 26, 2017
U.S. Treasury Bills 0.311% Due 01/26/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.311%
Debt instrument, maturity date	[7]	Jan. 26, 2017
U.S. Treasury Bills 0.311% Due 01/26/17 [Member] | ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.311%
Debt instrument, maturity date	[2],[5]	Jan. 26, 2017
U.S. Treasury Bills 0.411% Due 02/02/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.411%
Debt instrument, maturity date	[2]	Feb. 2, 2017
U.S. Treasury Bills 0.372% Due 02/09/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.372%
Debt instrument, maturity date	[1],[2]	Feb. 9, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.491%
Debt instrument, maturity date	[1],[2]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.491%
Debt instrument, maturity date	[1],[2]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.491%
Debt instrument, maturity date	[2],[4]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.491%
Debt instrument, maturity date	[2],[4]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.491%
Debt instrument, maturity date	[2]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.491%
Debt instrument, maturity date	[2],[5]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.491%
Debt instrument, maturity date	[2],[5]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.491%
Debt instrument, maturity date	[6],[9]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.491%
Debt instrument, maturity date	[7]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.491%
Debt instrument, maturity date	[2],[4]	Feb. 23, 2017
U.S. Treasury Bills 0.491% Due 02/23/17 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.491%
Debt instrument, maturity date	[2],[4]	Feb. 23, 2017
U.S. Treasury Bills 0.019% Due 02/04/16 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.019%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.209% Due 03/03/16 [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.209%
Debt instrument, maturity date	[1],[2]		Mar. 3, 2016
U.S. Treasury Bills 0.471% Due 02/09/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.471%
Debt instrument, maturity date	[2]	Feb. 9, 2017
U.S. Treasury Bills 0.437% Due 02/16/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.437%
Debt instrument, maturity date	[1],[2]	Feb. 16, 2017
U.S. Treasury Bills 0.065% Due 01/07/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.065%
Debt instrument, maturity date	[2]		Jan. 7, 2016
U.S. Treasury Bills 0.053% Due 01/14/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.053%
Debt instrument, maturity date	[2]		Jan. 14, 2016
U.S. Treasury Bills 0.000% Due 01/21/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Jan. 21, 2016
U.S. Treasury Bills 0.000% Due 01/21/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Jan. 21, 2016
U.S. Treasury Bills 0.000% Due 01/21/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Jan. 21, 2016
U.S. Treasury Bills 0.000% Due 01/21/16 [Member] | ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.00%
Debt instrument, maturity date	[2],[5]		Jan. 21, 2016
U.S. Treasury Bills 0.035% Due 02/04/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.035%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.035% Due 02/04/16 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.035%
Debt instrument, maturity date	[7]		Feb. 4, 2016
U.S. Treasury Bills 0.035% Due 02/04/16 [Member] | ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.035%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.036% Due 02/11/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.036%
Debt instrument, maturity date	[2]		Feb. 11, 2016
U.S. Treasury Bills 0.208% Due 03/03/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.208%
Debt instrument, maturity date	[2]		Mar. 3, 2016
U.S. Treasury Bills 0.208% Due 03/03/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.208%
Debt instrument, maturity date	[2]		Mar. 3, 2016
U.S. Treasury Bills 0.208% Due 03/03/16 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.208%
Debt instrument, maturity date	[2]		Mar. 3, 2016
U.S. Treasury Bills 0.208% Due 03/03/16 [Member] | ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.208%
Debt instrument, maturity date	[2]		Mar. 3, 2016
U.S. Treasury Bills 0.194% Due 03/17/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.194%
Debt instrument, maturity date	[2]		Mar. 17, 2016
U.S. Treasury Bills 0.206% Due 03/24/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.206%
Debt instrument, maturity date	[2]		Mar. 24, 2016
U.S. Treasury Bills 0.364% Due 05/26/16 [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.364%
Debt instrument, maturity date	[1],[2]		May 26, 2016
U.S. Treasury Bills 0.294% Due 01/05/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.294%
Debt instrument, maturity date	[2]	Jan. 5, 2017
U.S. Treasury Bills 0.307% Due 01/12/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.307%
Debt instrument, maturity date	[2]	Jan. 12, 2017
U.S. Treasury Bills 0.336% Due 01/19/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.336%
Debt instrument, maturity date	[1],[2]	Jan. 19, 2017
U.S. Treasury Bills 0.319% Due 01/26/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.319%
Debt instrument, maturity date	[1],[2]	Jan. 26, 2017
U.S. Treasury Bills 0.342% Due 02/02/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.342%
Debt instrument, maturity date	[1],[2]	Feb. 2, 2017
U.S. Treasury Bills 0.442% Due 02/09/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.442%
Debt instrument, maturity date	[1],[2]	Feb. 9, 2017
U.S. Treasury Bills 0.435% Due 02/16/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]	0.435%
Debt instrument, maturity date	[1],[2]	Feb. 16, 2017
U.S. Treasury Bills 0.000% Due 01/07/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Jan. 7, 2016
U.S. Treasury Bills 0.000% Due 01/07/16 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Jan. 7, 2016
U.S. Treasury Bills 0.000% Due 01/14/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.00%
Debt instrument, maturity date	[2]		Jan. 14, 2016
U.S. Treasury Bills 0.055% Due 01/28/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.055%
Debt instrument, maturity date	[2]		Jan. 28, 2016
U.S. Treasury Bills 0.055% Due 01/28/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.055%
Debt instrument, maturity date	[2]		Jan. 28, 2016
U.S. Treasury Bills 0.130% Due 02/04/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.13%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.150% Due 02/11/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.15%
Debt instrument, maturity date	[2]		Feb. 11, 2016
U.S. Treasury Bills 0.150% Due 02/11/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.15%
Debt instrument, maturity date	[2]		Feb. 11, 2016
U.S. Treasury Bills 0.150% Due 02/11/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.15%
Debt instrument, maturity date	[2]		Feb. 11, 2016
U.S. Treasury Bills 0.129% Due 02/18/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.129%
Debt instrument, maturity date	[2]		Feb. 18, 2016
U.S. Treasury Bills 0.125% Due 02/25/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.125%
Debt instrument, maturity date	[2]		Feb. 25, 2016
U.S. Treasury Bills 0.181% Due 03/03/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.181%
Debt instrument, maturity date	[2]		Mar. 3, 2016
U.S. Treasury Bills 0.066% Due 03/10/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.066%
Debt instrument, maturity date	[1],[2]		Mar. 10, 2016
U.S. Treasury Bills 0.207% Due 03/17/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.207%
Debt instrument, maturity date	[1],[2]		Mar. 17, 2016
U.S. Treasury Bills 0.101% Due 03/24/16 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.101%
Debt instrument, maturity date	[1],[2]		Mar. 24, 2016
U.S. Treasury Bills 0.080% Due 01/07/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.08%
Debt instrument, maturity date	[2]		Jan. 7, 2016
U.S. Treasury Bills 0.080% Due 01/07/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.08%
Debt instrument, maturity date	[2]		Jan. 7, 2016
U.S. Treasury Bills 0.080% Due 01/07/16 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.08%
Debt instrument, maturity date	[7]		Jan. 7, 2016
U.S. Treasury Bills 0.020% Due 01/21/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.02%
Debt instrument, maturity date	[2]		Jan. 21, 2016
U.S. Treasury Bills 0.026% Due 02/04/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.026%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.180% Due 02/18/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]		0.18%
Debt instrument, maturity date	[2],[3]		Feb. 18, 2016
U.S. Treasury Bills 0.180% Due 02/18/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.18%
Debt instrument, maturity date	[2]		Feb. 18, 2016
U.S. Treasury Bills 0.200% Due 03/10/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]		0.20%
Debt instrument, maturity date	[2],[3]		Mar. 10, 2016
U.S. Treasury Bills 0.200% Due 03/10/16 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.20%
Debt instrument, maturity date	[2]		Mar. 10, 2016
U.S. Treasury Bills 0.200% Due 03/10/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.20%
Debt instrument, maturity date	[8],[9]		Mar. 10, 2016
U.S. Treasury Bills 0.200% Due 03/10/16 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.20%
Debt instrument, maturity date	[7]		Mar. 10, 2016
U.S. Treasury Bills 0.200% Due 03/10/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.20%
Debt instrument, maturity date	[2]		Mar. 10, 2016
U.S. Treasury Bills 0.172% Due 03/17/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]		0.172%
Debt instrument, maturity date	[2],[3]		Mar. 17, 2016
U.S. Treasury Bills 0.176% Due 03/24/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]		0.176%
Debt instrument, maturity date	[2],[3]		Mar. 24, 2016
U.S. Treasury Bills 0.353% Due 05/26/16 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]		0.353%
Debt instrument, maturity date	[2],[3]		May 26, 2016
U.S. Treasury Bills 0.353% Due 05/26/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.353%
Debt instrument, maturity date	[2],[4]		May 26, 2016
U.S. Treasury Bills 0.353% Due 05/26/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.353%
Debt instrument, maturity date	[2],[5]		May 26, 2016
U.S. Treasury Bills 0.353% Due 05/26/16 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.353%
Debt instrument, maturity date	[2],[4]		May 26, 2016
U.S. Treasury Bills 0.281% Due 01/05/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]	0.281%
Debt instrument, maturity date	[2],[3]	Jan. 5, 2017
U.S. Treasury Bills 0.353% Due 01/12/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]	0.353%
Debt instrument, maturity date	[2],[3]	Jan. 12, 2017
U.S. Treasury Bills 0.344% Due 01/19/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]	0.344%
Debt instrument, maturity date	[2],[3]	Jan. 19, 2017
U.S. Treasury Bills 0.395% Due 01/26/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]	0.395%
Debt instrument, maturity date	[2],[3]	Jan. 26, 2017
U.S. Treasury Bills 0.406% Due 02/02/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.406%
Debt instrument, maturity date	[2]	Feb. 2, 2017
U.S. Treasury Bills 0.406% Due 02/02/17 [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.406%
Debt instrument, maturity date	[2]	Feb. 2, 2017
U.S. Treasury Bills 0.441% Due 02/09/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]	0.441%
Debt instrument, maturity date	[2],[3]	Feb. 9, 2017
U.S. Treasury Bills 0.458% Due 03/02/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]	0.458%
Debt instrument, maturity date	[2],[3]	Mar. 2, 2017
U.S. Treasury Bills 0.516% Due 03/30/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[3]	0.516%
Debt instrument, maturity date	[2],[3]	Mar. 30, 2017
U.S. Treasury Bills 0.233% Due 03/17/16 [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.233%
Debt instrument, maturity date	[2]		Mar. 17, 2016
U.S. Treasury Bills 0.185% Due 03/24/16 [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.185%
Debt instrument, maturity date	[2]		Mar. 24, 2016
U.S. Treasury Bills 0.386% Due 05/26/16 [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.386%
Debt instrument, maturity date	[2]		May 26, 2016
U.S. Treasury Bills 0.386% Due 05/26/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.386%
Debt instrument, maturity date	[2],[4]		May 26, 2016
U.S. Treasury Bills 0.343% Due 01/26/17 [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.343%
Debt instrument, maturity date	[2]	Jan. 26, 2017
U.S. Treasury Bills 0.135% Due 01/07/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.135%
Debt instrument, maturity date	[2],[4]		Jan. 7, 2016
U.S. Treasury Bills 0.135% Due 01/07/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.135%
Debt instrument, maturity date	[2],[4]		Jan. 7, 2016
U.S. Treasury Bills 0.135% Due 01/07/16 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.135%
Debt instrument, maturity date	[2],[4]		Jan. 7, 2016
U.S. Treasury Bills 0.135% Due 01/07/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.135%
Debt instrument, maturity date	[2],[4]		Jan. 7, 2016
U.S. Treasury Bills 0.040% Due 01/14/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.04%
Debt instrument, maturity date	[2],[4]		Jan. 14, 2016
U.S. Treasury Bills 0.040% Due 01/14/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8]		0.04%
Debt instrument, maturity date	[8]		Jan. 14, 2016
U.S. Treasury Bills 0.040% Due 01/14/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.04%
Debt instrument, maturity date	[2]		Jan. 14, 2016
U.S. Treasury Bills 0.043% Due 01/21/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.043%
Debt instrument, maturity date	[2],[4]		Jan. 21, 2016
U.S. Treasury Bills 0.043% Due 01/21/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.043%
Debt instrument, maturity date	[2]		Jan. 21, 2016
U.S. Treasury Bills 0.043% Due 01/21/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.043%
Debt instrument, maturity date	[2]		Jan. 21, 2016
U.S. Treasury Bills 0.210% Due 03/03/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.21%
Debt instrument, maturity date	[2]		Mar. 3, 2016
U.S. Treasury Bills 0.181% Due 03/17/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.181%
Debt instrument, maturity date	[2],[4]		Mar. 17, 2016
U.S. Treasury Bills 0.181% Due 03/17/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.181%
Debt instrument, maturity date	[2],[4]		Mar. 17, 2016
U.S. Treasury Bills 0.181% Due 03/17/16 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.181%
Debt instrument, maturity date	[2]		Mar. 17, 2016
U.S. Treasury Bills 0.181% Due 03/17/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.181%
Debt instrument, maturity date	[2],[5]		Mar. 17, 2016
U.S. Treasury Bills 0.203% Due 03/24/16 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.203%
Debt instrument, maturity date	[2],[4]		Mar. 24, 2016
U.S. Treasury Bills 0.203% Due 03/24/16 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.203%
Debt instrument, maturity date	[2]		Mar. 24, 2016
U.S. Treasury Bills 0.435% Due 01/12/17 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.435%
Debt instrument, maturity date	[2]	Jan. 12, 2017
U.S. Treasury Bills 0.435% Due 01/12/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.435%
Debt instrument, maturity date	[7]	Jan. 12, 2017
U.S. Treasury Bills 0.308% Due 01/19/17 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.308%
Debt instrument, maturity date	[2],[4]	Jan. 19, 2017
U.S. Treasury Bills 0.371% Due 01/26/17 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.371%
Debt instrument, maturity date	[2]	Jan. 26, 2017
U.S. Treasury Bills 0.371% Due 01/26/17 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.371%
Debt instrument, maturity date	[2]	Jan. 26, 2017
U.S. Treasury Bills 0.371% Due 01/26/17 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.371%
Debt instrument, maturity date	[2]	Jan. 26, 2017
U.S. Treasury Bills 0.407% Due 02/02/17 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.407%
Debt instrument, maturity date	[2]	Feb. 2, 2017
U.S. Treasury Bills 0.406% Due 02/16/17 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.406%
Debt instrument, maturity date	[2],[4]	Feb. 16, 2017
U.S. Treasury Bills 0.481% Due 03/09/17 [Member] | ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.481%
Debt instrument, maturity date	[2],[4]	Mar. 9, 2017
U.S. Treasury Bills 0.000% Due 02/11/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.00%
Debt instrument, maturity date	[2],[4]		Feb. 11, 2016
U.S. Treasury Bills 0.138% Due 02/18/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.138%
Debt instrument, maturity date	[2],[4]		Feb. 18, 2016
U.S. Treasury Bills 0.163% Due 03/24/16 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.163%
Debt instrument, maturity date	[2],[4]		Mar. 24, 2016
U.S. Treasury Bills 0.339% Due 01/12/17 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.339%
Debt instrument, maturity date	[2],[4]	Jan. 12, 2017
U.S. Treasury Bills 0.455% Due 01/19/17 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.455%
Debt instrument, maturity date	[2]	Jan. 19, 2017
U.S. Treasury Bills 0.452% Due 02/09/17 [Member] | ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.452%
Debt instrument, maturity date	[2],[4]	Feb. 9, 2017
U.S. Treasury Bills 0.452% Due 02/09/17 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.452%
Debt instrument, maturity date	[2],[5]	Feb. 9, 2017
U.S. Treasury Bills 0.027% Due 02/04/16 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.027%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.027% Due 02/04/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.027%
Debt instrument, maturity date	[2],[5]		Feb. 4, 2016
U.S. Treasury Bills 0.270% Due 01/12/17 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.27%
Debt instrument, maturity date	[2]	Jan. 12, 2017
U.S. Treasury Bills 0.270% Due 01/12/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.27%
Debt instrument, maturity date	[6],[9]	Jan. 12, 2017
U.S. Treasury Bills 0.270% Due 01/12/17 [Member] | ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.27%
Debt instrument, maturity date	[2]	Jan. 12, 2017
U.S. Treasury Bills 0.270% Due 01/12/17 [Member] | ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.27%
Debt instrument, maturity date	[2]	Jan. 12, 2017
U.S. Treasury Bills 0.355% Due 01/19/17 [Member] | ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.355%
Debt instrument, maturity date	[2]	Jan. 19, 2017
U.S. Treasury Bills 0.355% Due 01/19/17 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.355%
Debt instrument, maturity date	[2],[4]	Jan. 19, 2017
U.S. Treasury Bills 0.048% Due 02/04/16 [Member] | ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.048%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.151% Due 03/03/16 [Member] | ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.151%
Debt instrument, maturity date	[1],[2]		Mar. 3, 2016
U.S. Treasury Bills 0.151% Due 03/03/16 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.151%
Debt instrument, maturity date	[7]		Mar. 3, 2016
U.S. Treasury Bills 0.156% Due 03/24/16 [Member] | ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1],[2]		0.156%
Debt instrument, maturity date	[1],[2]		Mar. 24, 2016
U.S. Treasury Bills 0.326% Due 01/19/17 [Member] | ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.326%
Debt instrument, maturity date	[2]	Jan. 19, 2017
U.S. Treasury Bills 0.286% Due 01/05/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.286%
Debt instrument, maturity date	[5]	Jan. 5, 2017
U.S. Treasury Bills 0.286% Due 01/05/17 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.286%
Debt instrument, maturity date	[2],[5]	Jan. 5, 2017
U.S. Treasury Bills 0.421% Due 01/12/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.421%
Debt instrument, maturity date	[5]	Jan. 12, 2017
U.S. Treasury Bills 0.342% Due 01/19/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.342%
Debt instrument, maturity date	[2]	Jan. 19, 2017
U.S. Treasury Bills 0.350% Due 01/26/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.35%
Debt instrument, maturity date	[2],[5]	Jan. 26, 2017
U.S. Treasury Bills 0.391% Due 02/02/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.391%
Debt instrument, maturity date	[2],[5]	Feb. 2, 2017
U.S. Treasury Bills 0.471% Due 02/09/17 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.471%
Debt instrument, maturity date	[2]	Feb. 9, 2017
U.S. Treasury Bills 0.133% Due 01/28/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.133%
Debt instrument, maturity date	[2]		Jan. 28, 2016
U.S. Treasury Bills 0.167% Due 03/03/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.167%
Debt instrument, maturity date	[2],[5]		Mar. 3, 2016
U.S. Treasury Bills 0.175% Due 03/24/16 [Member] | ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.175%
Debt instrument, maturity date	[2],[5]		Mar. 24, 2016
U.S. Treasury Bills 0.148% Due 01/14/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.148%
Debt instrument, maturity date	[2]		Jan. 14, 2016
U.S. Treasury Bills 0.110% Due 01/28/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.11%
Debt instrument, maturity date	[2]		Jan. 18, 2016
U.S. Treasury Bills 0.110% Due 01/28/16 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.11%
Debt instrument, maturity date	[2]		Jan. 28, 2016
U.S. Treasury Bills 0.013% Due 02/04/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.013%
Debt instrument, maturity date	[2]		Feb. 4, 2016
U.S. Treasury Bills 0.152% Due 03/24/16 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.152%
Debt instrument, maturity date	[2],[5]		Mar. 24, 2016
U.S. Treasury Bills 0.343% Due 01/12/17 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.343%
Debt instrument, maturity date	[2],[5]	Jan. 12, 2017
U.S. Treasury Bills 0.405% Due 01/19/17 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.405%
Debt instrument, maturity date	[2],[5]	Jan. 19, 2017
U.S. Treasury Bills 0.346% Due 01/26/17 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.346%
Debt instrument, maturity date	[2],[5]	Jan. 26, 2017
U.S. Treasury Bills 0.390% Due 02/02/17 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.39%
Debt instrument, maturity date	[2],[5]	Feb. 2, 2017
U.S. Treasury Bills 0.393% Due 02/16/17 [Member] | ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.393%
Debt instrument, maturity date	[2]	Feb. 16, 2017
U.S. Treasury Bills 0.393% Due 02/16/17 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.393%
Debt instrument, maturity date	[2],[4]	Feb. 16, 2017
U.S. Treasury Bills 0.289% Due 01/05/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.289%
Debt instrument, maturity date	[6],[9]	Jan. 5, 2017
U.S. Treasury Bills 0.371% Due 01/19/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.371%
Debt instrument, maturity date	[6],[9]	Jan. 19, 2017
U.S. Treasury Bills 0.362% Due 01/26/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.362%
Debt instrument, maturity date	[6],[9]	Jan. 26, 2017
U.S. Treasury Bills 0.418% Due 02/02/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.418%
Debt instrument, maturity date	[6],[9]	Feb. 2, 2017
U.S. Treasury Bills 0.400% Due 02/09/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.40%
Debt instrument, maturity date	[6],[9]	Feb. 9, 2017
U.S. Treasury Bills 0.420% Due 02/16/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.42%
Debt instrument, maturity date	[6],[9]	Feb. 16, 2017
U.S. Treasury Bills 0.481% Due 03/09/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6],[9]	0.481%
Debt instrument, maturity date	[6],[9]	Mar. 9, 2017
U.S. Treasury Bills 0.001% Due 01/21/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8]		0.001%
Debt instrument, maturity date	[8]		Jan. 21, 2016
U.S. Treasury Bills 0.001% Due 01/21/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.001%
Debt instrument, maturity date	[2],[4]		Jan. 21, 2016
U.S. Treasury Bills 0.094% Due 01/28/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.094%
Debt instrument, maturity date	[8],[9]		Jan. 28, 2016
U.S. Treasury Bills 0.025% Due 02/04/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8]		0.025%
Debt instrument, maturity date	[8]		Feb. 4, 2016
U.S. Treasury Bills 0.005% Due 02/11/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.005%
Debt instrument, maturity date	[8],[9]		Feb. 11, 2016
U.S. Treasury Bills 0.119% Due 02/18/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.119%
Debt instrument, maturity date	[8],[9]		Feb. 18, 2016
U.S. Treasury Bills 0.013% Due 02/25/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.013%
Debt instrument, maturity date	[8],[9]		Feb. 25, 2016
U.S. Treasury Bills 0.202% Due 03/03/16[Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.202%
Debt instrument, maturity date	[8],[9]		Mar. 3, 2016
U.S. Treasury Bills 0.147% Due 03/17/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.147%
Debt instrument, maturity date	[8],[9]		Mar. 17, 2016
U.S. Treasury Bills 0.178% Due 03/24/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.178%
Debt instrument, maturity date	[8],[9]		Jan. 24, 2016
U.S. Treasury Bills 0.356% Due 05/26/16 [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8],[9]		0.356%
Debt instrument, maturity date	[8],[9]		May 26, 2016
U.S. Treasury Bills 0.356% Due 05/26/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.356%
Debt instrument, maturity date	[2],[4]		May 26, 2016
U.S. Treasury Bills 0.345% Due 01/19/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.345%
Debt instrument, maturity date	[7]	Jan. 19, 2017
U.S. Treasury Bills 0.403% Due 02/02/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.403%
Debt instrument, maturity date	[7]	Feb. 2, 2017
U.S. Treasury Bills 0.425% Due 02/09/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.425%
Debt instrument, maturity date	[7]	Feb. 9, 2017
U.S. Treasury Bills 0.440% Due 02/16/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.44%
Debt instrument, maturity date	[7]	Feb. 16, 2017
U.S. Treasury Bills 0.186% Due 03/24/16 [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.186%
Debt instrument, maturity date	[7]		Mar. 24, 2016
U.S. Treasury Bills 0.000% Due 02/04/16 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.00%
Debt instrument, maturity date	[2],[4]		Feb. 4, 2016
U.S. Treasury Bills 0.240% Due 03/17/16 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.24%
Debt instrument, maturity date	[2]		Mar. 17, 2016
U.S. Treasury Bills 0.184% Due 03/24/16 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.184%
Debt instrument, maturity date	[2],[4]		Mar. 24, 2016
U.S. Treasury Bills 0.318% Due 01/05/17 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.318%
Debt instrument, maturity date	[2],[4]	Jan. 5, 2017
U.S. Treasury Bills 0.318% Due 01/05/17 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.318%
Debt instrument, maturity date	[2],[4]	Jan. 5, 2017
U.S. Treasury Bills 0.276% Due 01/12/17 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.276%
Debt instrument, maturity date	[2],[4]	Jan. 12, 2017
U.S. Treasury Bills 0.360% Due 01/26/17 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.36%
Debt instrument, maturity date	[2],[4]	Jan. 26, 2017
U.S. Treasury Bills 0.406% Due 02/02/17 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.406%
Debt instrument, maturity date	[2],[4]	Feb. 2, 2017
U.S. Treasury Bills 0.493% Due 03/23/17 [Member] | ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.493%
Debt instrument, maturity date	[2],[4]	Mar. 23, 2017
U.S. Treasury Bills 0.039% Due 02/04/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.039%
Debt instrument, maturity date	[2],[4]		Feb. 4, 2016
U.S. Treasury Bills 0.115% Due 02/18/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.115%
Debt instrument, maturity date	[2]		Feb. 18, 2016
U.S. Treasury Bills 0.199% Due 03/03/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.199%
Debt instrument, maturity date	[2],[4]		Mar. 3, 2016
U.S. Treasury Bills 0.180% Due 03/24/16 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]		0.18%
Debt instrument, maturity date	[2],[4]		Mar. 24, 2016
U.S. Treasury Bills 0.354% Due 01/12/17 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.354%
Debt instrument, maturity date	[2],[4]	Jan. 12, 2017
U.S. Treasury Bills 0.339% Due 01/19/17 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.339%
Debt instrument, maturity date	[2],[4]	Jan. 19, 2017
U.S. Treasury Bills 0.394% Due 02/02/17 [December] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.394%
Debt instrument, maturity date	[2],[4]	Feb. 2, 2017
U.S. Treasury Bills 0.452% Due 02/09/17 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.452%
Debt instrument, maturity date	[2],[4]	Feb. 9, 2017
U.S. Treasury Bills 0.423% Due 02/16/17 [Member] | ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[4]	0.423%
Debt instrument, maturity date	[2],[4]	Feb. 16, 2017
U.S. Treasury Bills 0.166% Due 03/24/16 [Member] | ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]		0.166%
Debt instrument, maturity date	[2],[5]		Mar. 24, 2016
U.S. Treasury Bills 0.295% Due 01/05/17 [Member] | ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.295%
Debt instrument, maturity date	[2],[5]	Jan. 5, 2017
U.S. Treasury Bills 0.210% Due 01/05/17 [Member] | ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2],[5]	0.21%
Debt instrument, maturity date	[2],[5]	Jan. 5, 2017
[1]	All or partial amount pledged as collateral for futures contracts.
[2]	Rates shown represents discount rate at the time of purchase.
[3]	All or partial amount pledged as collateral for swap agreements and/or futures contracts.
[4]	All or partial amount pledged as collateral for forward agreements and/or futures contracts.
[5]	All or partial amount pledged as collateral for foreign currency forward contracts.
[6]	Rates shown represents discount rate at the time of purchase.
[7]	Rates shown represents discount rate at the time of the purchase.
[8]	Rates shown represents discount rate at the time of the purchase.
[9]	All or partial amount pledged as collateral for swap agreements and/or futures contracts.

Schedule of Investments - Futur

Schedule of Investments - Futures Contracts Purchased (Detail)		12 Months Ended
		Dec. 31, 2016USD ($)Contract		Dec. 31, 2015USD ($)Contract
ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (468,652)	[1]	$ (1,078,625)	[2]
Cash collateral pledged to cover margin requirements		$ 17,235,855		$ 5,888,545
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	6,549
Notional Amount at Value	[1]	$ 99,053,625
Unrealized Appreciation (Depreciation)	[1]	$ (2,742,526)
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	4,560
Notional Amount at Value	[1]	$ 75,582,000
Unrealized Appreciation (Depreciation)	[1]	2,273,874
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			2,821
Notional Amount at Value	[2]			$ 52,259,025
Unrealized Appreciation (Depreciation)	[2]			$ (958,831)
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			2,821
Notional Amount at Value	[2]			$ 53,246,375
Unrealized Appreciation (Depreciation)	[2]			(119,794)
ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		(1,288,245)	[3]	(344,360)	[4]
Cash collateral pledged to cover margin requirements		$ 1,052,615		$ 980,750
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires April 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[3]	474
Notional Amount at Value	[3]	$ 8,733,450
Unrealized Appreciation (Depreciation)	[3]	$ (655,635)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires May 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[3]	806
Notional Amount at Value	[3]	$ 15,172,950
Unrealized Appreciation (Depreciation)	[3]	$ (628,070)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires June 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[3]	807
Notional Amount at Value	[3]	$ 15,393,525
Unrealized Appreciation (Depreciation)	[3]	$ (72,915)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires July 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[3]	332
Notional Amount at Value	[3]	$ 6,523,800
Unrealized Appreciation (Depreciation)	[3]	68,375
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires April 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[4]			235
Notional Amount at Value	[4]			$ 4,547,250
Unrealized Appreciation (Depreciation)	[4]			$ (168,335)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires May 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[4]			469
Notional Amount at Value	[4]			$ 9,145,500
Unrealized Appreciation (Depreciation)	[4]			$ 10,005
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires June 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[4]			469
Notional Amount at Value	[4]			$ 9,262,750
Unrealized Appreciation (Depreciation)	[4]			$ (135,125)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires July 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[4]			234
Notional Amount at Value	[4]			$ 4,691,700
Unrealized Appreciation (Depreciation)	[4]			(50,905)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		(7,972,237)	[5]	11,894,466	[6]
Cash collateral pledged to cover margin requirements		$ 71,363,625		$ 62,348,600
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[5]	38,688
Notional Amount at Value	[5]	$ 585,156,000
Unrealized Appreciation (Depreciation)	[5]	$ (21,567,112)
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[5]	27,012
Notional Amount at Value	[5]	$ 447,723,900
Unrealized Appreciation (Depreciation)	[5]	13,594,875
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[6]			29,321
Notional Amount at Value	[6]			$ 543,171,525
Unrealized Appreciation (Depreciation)	[6]			$ 10,546,019
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[6]			29,320
Notional Amount at Value	[6]			$ 553,415,000
Unrealized Appreciation (Depreciation)	[6]			1,348,447
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		55,358,571	[7]	(72,176,589)	[8]
ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements		$ 20,609,600		$ 47,571,810
ProShares Ultra Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, Expires March 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[9]	5,855
Notional Amount at Value	[9]	$ 320,034,300
Unrealized Appreciation (Depreciation)	[9]	5,537,165
ProShares Ultra Bloomberg Crude Oil [Member] | Crude Oil - NYMEX, Expires March 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[10]			11,089
Notional Amount at Value	[10]			$ 423,267,130
Unrealized Appreciation (Depreciation)	[10]			(17,929,314)
ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements		$ 7,612,770		$ 7,595,280
ProShares Ultra Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, Expires March 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[11]	2,346
Notional Amount at Value	[11]	$ 86,426,640
Unrealized Appreciation (Depreciation)	[11]	2,536,720
ProShares Ultra Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, Expires March 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[12]			3,288
Notional Amount at Value	[12]			$ 77,695,440
Unrealized Appreciation (Depreciation)	[12]			6,312,879
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		(4,431,107)	[13]	(2,250,595)	[14]
ProShares Ultra Gold [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements		$ 13,200		$ 8,250
ProShares Ultra Gold [Member] | Gold Futures - COMEX, Expires February 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[15]			2
Notional Amount at Value	[15]			$ 212,040
Unrealized Appreciation (Depreciation)	[15]			(5,200)
ProShares Ultra Gold [Member] | Gold Futures - COMEX, Expires February 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[16]	2
Notional Amount at Value	[16]	$ 230,340
Unrealized Appreciation (Depreciation)	[16]	(18,960)
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		(20,976,189)	[13]	(22,561,101)	[14]
ProShares Ultra Silver [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements		$ 14,300		$ 17,160
ProShares Ultra Silver [Member] | Silver Futures - COMEX, Expires March 2016 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[17]			3
Notional Amount at Value	[17]			$ 207,045
Unrealized Appreciation (Depreciation)	[17]			$ (9,030)
ProShares Ultra Silver [Member] | Silver Futures - COMEX, Expires March 2017 [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[18]	2
Notional Amount at Value	[18]	$ 159,890
Unrealized Appreciation (Depreciation)	[18]	$ (27,360)
[1]	Cash collateral in the amount of $17,235,855 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[2]	Cash collateral in the amount of $5,888,545 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[3]	Cash collateral in the amount of $1,052,615 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[4]	Cash collateral in the amount of $980,750 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[5]	Cash collateral in the amount of $71,363,625 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[6]	Cash collateral in the amount of $62,348,600 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[7]	The positions and counterparties herein are as of December 31, 2016. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[8]	The positions and counterparties herein are as of December 31, 2015. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.
[9]	Cash collateral in the amount of $20,609,600 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[10]	Cash collateral in the amount of $47,571,810 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[11]	Cash collateral in the amount of $7,612,770 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[12]	Cash collateral in the amount of $7,595,280 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[13]	The positions and counterparties herein are as of December 31, 2016. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.
[14]	The positions and counterparties herein are as of December 31, 2015. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[15]	Cash collateral in the amount of $8,250 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[16]	Cash collateral in the amount of $13,200 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[17]	Cash collateral in the amount of $17,160 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[18]	Cash collateral in the amount of $14,300 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.

Schedule of Investments - Fut26

Schedule of Investments - Futures Contracts Purchased (Parenthetical) (Detail) - Futures Contracts Purchased [Member] - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 17,235,855	$ 5,888,545
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	1,052,615	980,750
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	71,363,625	62,348,600
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	20,609,600	47,571,810
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	7,612,770	7,595,280
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	13,200	8,250
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 14,300	$ 17,160

Schedule of Investments - Fut27

Schedule of Investments - Futures Contracts Sold (Detail)		Dec. 31, 2016USD ($)Contract		Dec. 31, 2015USD ($)Contract
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (10,309,611)	[1]	$ 10,746,415	[2]
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2017 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	8,491
Notional Amount at Value	[1]	$ 128,426,375
Unrealized Appreciation (Depreciation)	[1]	$ (7,027,685)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2017 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	5,974
Notional Amount at Value	[1]	$ 99,019,050
Unrealized Appreciation (Depreciation)	[1]	(3,281,926)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2016 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			17,150
Notional Amount at Value	[2]			$ 317,703,750
Unrealized Appreciation (Depreciation)	[2]			$ 10,805,245
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2016 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			17,151
Notional Amount at Value	[2]			$ 323,725,125
Unrealized Appreciation (Depreciation)	[2]			(58,830)
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (12,206,881)	[3]	$ 6,412,656	[4]
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, Expires March 2017 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[5]	1,401
Notional Amount at Value	[5]	$ 76,578,660
Unrealized Appreciation (Depreciation)	[5]	$ (1,426,815)
ProShares UltraShort Bloomberg Crude Oil [Member] | Crude Oil - NYMEX, Expires March 2016 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[6]			2,367
Notional Amount at Value	[6]			$ 90,348,390
Unrealized Appreciation (Depreciation)	[6]			$ 2,464,513
ProShares UltraShort Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, Expires March 2017 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[7]	219
Notional Amount at Value	[7]	$ 8,067,960
Unrealized Appreciation (Depreciation)	[7]	(482,031)
ProShares UltraShort Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, Expires March 2016 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[8]			886
Notional Amount at Value	[8]			$ 20,936,180
Unrealized Appreciation (Depreciation)	[8]			(2,471,164)
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 3,033,566	[3]	$ 1,808,942	[4]
ProShares UltraShort Gold [Member] | Gold Futures - COMEX, Expires February 2017 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[9]	2
Notional Amount at Value	[9]	$ 230,340
Unrealized Appreciation (Depreciation)	[9]	18,980
ProShares UltraShort Gold [Member] | Gold Futures - COMEX, Expires February 2016 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[10]			2
Notional Amount at Value	[10]			$ 212,040
Unrealized Appreciation (Depreciation)	[10]			5,220
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 1,384,246	[3]	$ 4,778,279	[4]
ProShares UltraShort Silver [Member] | Silver Futures - COMEX, Expires March 2017 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[11]	2
Notional Amount at Value	[11]	$ 159,890
Unrealized Appreciation (Depreciation)	[11]	$ 27,310
ProShares UltraShort Silver [Member] | Silver Futures - COMEX, Expires March 2016 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[12]			2
Notional Amount at Value	[12]			$ 138,030
Unrealized Appreciation (Depreciation)	[12]			$ 5,970
ProShares Short Euro [Member] | Euro Fx Currency Futures - CME, Expires March 2017 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[13]	120
Notional Amount at Value	[13]	$ 15,861,000
Unrealized Appreciation (Depreciation)	[13]	$ 132,900
ProShares Short Euro [Member] | Euro Fx Currency Futures - CME, Expires March 2016 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[14]			129
Notional Amount at Value	[14]			$ 17,553,675
Unrealized Appreciation (Depreciation)	[14]			$ 243,438
ProShares UltraShort Australian Dollar [Member] | Australian Dollar Fx Currency Futures - CME, Expires March 2017 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[15]	462
Notional Amount at Value	[15]	$ 33,273,240
Unrealized Appreciation (Depreciation)	[15]	$ 1,182,340
ProShares UltraShort Australian Dollar [Member] | Australian Dollar Fx Currency Futures - CME, Expires March 2016 [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[16]			562
Notional Amount at Value	[16]			$ 40,834,920
Unrealized Appreciation (Depreciation)	[16]			$ (420,270)
[1]	Cash collateral in the amount of $55,323,984 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[2]	Cash collateral in the amount of $123,528,405 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[3]	The positions and counterparties herein are as of December 31, 2016. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.
[4]	The positions and counterparties herein are as of December 31, 2015. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.
[5]	Cash collateral in the amount of $4,931,520 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[6]	Cash collateral in the amount of $10,154,430 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[7]	Cash collateral in the amount of $710,655 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[8]	Cash collateral in the amount of $2,046,660 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[9]	Cash collateral in the amount of $13,200 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[10]	Cash collateral in the amount of $8,250 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[11]	Cash collateral in the amount of $14,300 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[12]	Cash collateral in the amount of $11,440 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[13]	Cash collateral in the amount of $402,600 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[14]	Cash collateral in the amount of $503,745 was pledged to cover margin requirements for open futures contracts as of December 31, 2015
[15]	Cash collateral in the amount of $914,760 was pledged to cover margin requirements for open futures contracts as of December 31, 2016.
[16]	Cash collateral in the amount of $57,065 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.

Schedule of Investments - Fut28

Schedule of Investments - Futures Contracts Sold (Parenthetical) (Detail) - Futures Contracts Sold [Member] - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 55,323,984	$ 123,528,405
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	4,931,520	10,154,430
ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	710,655	2,046,660
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	13,200	8,250
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	14,300	11,440
ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	402,600	503,745
ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 914,760	$ 57,065

Schedule of Investments - Swap

Schedule of Investments - Swap Agreements (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (12,206,881)	[1]	$ 6,412,656	[2]
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with Goldman Sachs International Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[3]	0.25%
Termination Date	[1]	Jan. 10, 2017
Notional Amount at Value	[1],[4]	$ (87,898,388)
Unrealized Appreciation (Depreciation)	[1]	$ (3,061,395)
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with Societe Generale S.A. Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[3]	0.25%
Termination Date	[1]	Jan. 10, 2017
Notional Amount at Value	[1],[4]	$ (31,195,025)
Unrealized Appreciation (Depreciation)	[1]	$ (1,050,699)
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with UBS AG Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[3]	0.25%
Termination Date	[1]	Jan. 10, 2017
Notional Amount at Value	[1],[4]	$ (89,698,517)
Unrealized Appreciation (Depreciation)	[1]	$ (3,352,596)
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with Citibank N.A. Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[3]	0.18%
Termination Date	[1]	Jan. 10, 2017
Notional Amount at Value	[1],[4]	$ (116,603,958)
Unrealized Appreciation (Depreciation)	[1]	(4,742,191)
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with Citibank N.A. Based on Bloomberg Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[2],[5]			0.18%
Termination Date	[2]			Jan. 6, 2016
Notional Amount at Value	[2],[4]			$ (19,234,533)
Unrealized Appreciation (Depreciation)	[2]			$ 1,098,278
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with Deutsche Bank AG Based on Bloomberg Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[2],[5]			0.25%
Termination Date	[2]			Jan. 6, 2016
Notional Amount at Value	[2],[4]			$ (29,881,854)
Unrealized Appreciation (Depreciation)	[2]			$ 1,722,894
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with Goldman Sachs International Based on Bloomberg Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[2],[5]			0.25%
Termination Date	[2]			Jan. 6, 2016
Notional Amount at Value	[2],[4]			$ (17,799,590)
Unrealized Appreciation (Depreciation)	[2]			$ 1,595,552
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with Societe Generale S.A. Based on Bloomberg Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[2],[5]			0.25%
Termination Date	[2]			Jan. 6, 2016
Notional Amount at Value	[2],[4]			$ (8,303,436)
Unrealized Appreciation (Depreciation)	[2]			$ 521,142
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreement with UBS AG Based on Bloomberg Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[2],[5]			0.25%
Termination Date	[2]			Jan. 6, 2016
Notional Amount at Value	[2],[4]			$ (26,258,293)
Unrealized Appreciation (Depreciation)	[2]			1,474,790
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 55,358,571	[6]	$ (72,176,589)	[2]
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreement with Deutsche Bank AG Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[2],[5]			25.00%
Termination Date	[2]			Jan. 6, 2016
Notional Amount at Value	[2],[4]			$ 292,553,469
Unrealized Appreciation (Depreciation)	[2]			$ (20,221,872)
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreement with Goldman Sachs International Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		25.00%	[3],[6]	25.00%	[2],[5]
Termination Date		Jan. 10, 2017	[6]	Jan. 6, 2016	[2]
Notional Amount at Value	[4]	$ 379,451,639	[6]	$ 298,419,036	[2]
Unrealized Appreciation (Depreciation)		$ 14,016,906	[6]	$ (20,806,119)	[2]
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreement with Societe Generale S.A. Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		25.00%	[3],[6]	25.00%	[2],[5]
Termination Date		Jan. 10, 2017	[6]	Jan. 6, 2016	[2]
Notional Amount at Value	[4]	$ 259,616,766	[6]	$ 100,733,521	[2]
Unrealized Appreciation (Depreciation)		$ 8,661,821	[6]	$ (6,357,459)	[2]
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreement with UBS AG Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		25.00%	[3],[6]	25.00%	[2],[5]
Termination Date		Jan. 10, 2017	[6]	Jan. 6, 2016	[2]
Notional Amount at Value	[4]	$ 363,331,028	[6]	$ 294,338,185	[2]
Unrealized Appreciation (Depreciation)		$ 14,252,835	[6]	$ (22,281,150)	[2]
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreement with Citibank N.A. Based on Bloomberg WTI Crude Oil Subindex [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		18.00%	[3],[6]	18.00%	[2],[5]
Termination Date		Jan. 10, 2017	[6]	Jan. 6, 2016	[2]
Notional Amount at Value	[4]	$ 545,083,669	[6]	$ 158,594,078	[2]
Unrealized Appreciation (Depreciation)		$ 18,427,009	[6]	$ (2,509,989)	[2]
[1]	The positions and counterparties herein are as of December 31, 2016. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.
[2]	The positions and counterparties herein are as of December 31, 2015. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.
[3]	Reflects the floating financing rate, as of December 31, 2016, on the notional amount of the swap agreement paid to the counterparty or received from the counterparty, excluding any commissions.
[4]	For swap agreements, a positive amount represents "long" exposure to the benchmark index. A negative amount represents "short" exposure to the benchmark index.
[5]	Reflects the floating financing rate, as of December 31, 2015, on the notional amount of the swap agreement paid to the counterparty or received from the counterparty, excluding any commissions.
[6]	The positions and counterparties herein are as of December 31, 2016. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.

Schedule of Investments - Forwa

Schedule of Investments - Forward Agreements (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 3,033,566	[1]	$ 1,808,942	[2]
ProShares UltraShort Gold [Member] | Forward Agreements with Citibank N.A. Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		(0.85%)	[1],[3]	0.50%	[2],[4]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[2]
Commitment to (Deliver)/Receive		$ (44,500)	[1]	$ (6,500)	[2]
Notional Amount at Value	[5]	(51,008,125)	[1]	(6,889,740)	[2]
Unrealized Appreciation (Depreciation)		$ 1,147,811	[1]	$ 3,915	[2]
ProShares UltraShort Gold [Member] | Forward Agreements with Deutsche Bank AG Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[2],[4]			0.25%
Settlement Date	[2]			Jan. 6, 2016
Commitment to (Deliver)/Receive	[2]			$ (68,100)
Notional Amount at Value	[2],[5]			(72,186,681)
Unrealized Appreciation (Depreciation)	[2]			$ 1,046,664
ProShares UltraShort Gold [Member] | Forward Agreements with Goldman Sachs International Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		(0.70%)	[1],[3]	0.60%	[2],[4]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[2]
Commitment to (Deliver)/Receive		$ (25,498)	[1]	$ (26,298)	[2]
Notional Amount at Value	[5]	(29,227,083)	[1]	(27,874,828)	[2]
Unrealized Appreciation (Depreciation)		$ 881,454	[1]	$ 158,827	[2]
ProShares UltraShort Gold [Member] | Forward Agreements with Societe Generale S.A. Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		(0.65%)	[1],[3]	0.74%	[2],[4]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[2]
Commitment to (Deliver)/Receive		$ (14,600)	[1]	$ (14,000)	[2]
Notional Amount at Value	[5]	(16,735,250)	[1]	(14,839,440)	[2]
Unrealized Appreciation (Depreciation)		$ 393,006	[1]	$ 212,680	[2]
ProShares UltraShort Gold [Member] | Forward Agreements with UBS AG Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		(0.74%)	[1],[3]	0.61%	[2],[4]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[2]
Commitment to (Deliver)/Receive		$ (26,250)	[1]	$ (26,350)	[2]
Notional Amount at Value	[5]	(30,089,325)	[1]	(27,929,946)	[2]
Unrealized Appreciation (Depreciation)		611,295	[1]	386,856	[2]
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 1,384,246	[1]	$ 4,778,279	[2]
ProShares UltraShort Silver [Member] | Forward Agreements with Deutsche Bank AG Based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[2],[4]			(0.50%)
Settlement Date	[2]			Jan. 6, 2016
Commitment to (Deliver)/Receive	[2]			$ (3,253,000)
Notional Amount at Value	[2],[5]			(44,962,315)
Unrealized Appreciation (Depreciation)	[2]			$ 2,500,263
ProShares UltraShort Silver [Member] | Forward Agreements with Goldman Sachs International Based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		(0.80%)	[1],[6]	(0.10%)	[2],[4]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[2]
Commitment to (Deliver)/Receive		$ (934,500)	[1]	$ (2,047,500)	[2]
Notional Amount at Value	[5]	(15,181,326)	[1]	(28,298,907)	[2]
Unrealized Appreciation (Depreciation)		$ 323,829	[1]	$ 1,044,986	[2]
ProShares UltraShort Silver [Member] | Forward Agreements with Societe Generale S.A. Based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		(0.80%)	[1],[6]	0.00%	[2],[4]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[2]
Commitment to (Deliver)/Receive		$ (156,000)	[1]	$ (656,000)	[2]
Notional Amount at Value	[5]	(2,534,314)	[1]	(9,066,707)	[2]
Unrealized Appreciation (Depreciation)		$ 86,543	[1]	$ 438,975	[2]
ProShares UltraShort Silver [Member] | Forward Agreements with UBS AG Based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		(0.82%)	[1],[6]	(0.09%)	[2],[4]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[2]
Commitment to (Deliver)/Receive		$ (657,000)	[1]	$ (2,135,000)	[2]
Notional Amount at Value	[5]	(10,673,425)	[1]	(29,508,262)	[2]
Unrealized Appreciation (Depreciation)		$ 363,396	[1]	794,055	[2]
ProShares UltraShort Silver [Member] | Forward Agreements With Citibank, N.A. based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[6]	(1.05%)
Settlement Date	[1]	Jan. 10, 2017
Commitment to (Deliver)/Receive	[1]	$ (1,076,000)
Notional Amount at Value	[1],[5]	(17,480,588)
Unrealized Appreciation (Depreciation)	[1]	610,478
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (4,431,107)	[1]	$ (2,250,595)	[7]
ProShares Ultra Gold [Member] | Forward Agreements with Citibank N.A. Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		1.35%	[1],[8]	0.00%	[4],[7]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[7]
Commitment to (Deliver)/Receive		$ 55,100	[1]	$ 3,000	[7]
Notional Amount at Value	[5]	63,158,375	[1]	3,179,880	[7]
Unrealized Appreciation (Depreciation)		$ (1,464,982)	[1]	$ (4,614)	[7]
ProShares Ultra Gold [Member] | Forward Agreements with Deutsche Bank AG Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[4],[7]			0.35%
Settlement Date	[7]			Jan. 6, 2016
Commitment to (Deliver)/Receive	[7]			$ 63,900
Notional Amount at Value	[5],[7]			67,734,639
Unrealized Appreciation (Depreciation)	[7]			$ (1,049,383)
ProShares Ultra Gold [Member] | Forward Agreements with Goldman Sachs International Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		1.55%	[1],[8]	0.25%	[4],[7]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[7]
Commitment to (Deliver)/Receive		$ 42,320	[1]	$ 23,620	[7]
Notional Amount at Value	[5]	48,509,300	[1]	25,036,255	[7]
Unrealized Appreciation (Depreciation)		$ (1,112,916)	[1]	$ (520,730)	[7]
ProShares Ultra Gold [Member] | Forward Agreements with UBS AG Based on 0.995 Fine Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		1.54%	[1],[8]	0.19%	[4],[7]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[7]
Commitment to (Deliver)/Receive		$ 39,800	[1]	$ 25,700	[7]
Notional Amount at Value	[5]	45,621,148	[1]	27,240,972	[7]
Unrealized Appreciation (Depreciation)		$ (1,209,622)	[1]	$ (430,876)	[7]
ProShares Ultra Gold [Member] | Forward Agreements with Societe Generale based on 0.995 Troy Ounce Gold [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		1.55%	[1],[8]	0.26%	[4],[7]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[7]
Commitment to (Deliver)/Receive		$ 23,300	[1]	$ 15,400	[7]
Notional Amount at Value	[5]	26,707,625	[1]	16,323,384	[7]
Unrealized Appreciation (Depreciation)		(643,587)	[1]	(244,992)	[7]
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (20,976,189)	[1]	$ (22,561,101)	[7]
ProShares Ultra Silver [Member] | Forward Agreements with Deutsche Bank AG Based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[4],[7]			1.10%
Settlement Date	[7]			Jan. 6, 2016
Commitment to (Deliver)/Receive	[7]			$ 13,088,000
Notional Amount at Value	[5],[7]			180,899,718
Unrealized Appreciation (Depreciation)	[7]			$ (9,355,945)
ProShares Ultra Silver [Member] | Forward Agreements with Goldman Sachs International Based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		1.65%	[1],[3]	0.95%	[4],[7]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[7]
Commitment to (Deliver)/Receive		$ 8,498,800	[1]	$ 6,855,800	[7]
Notional Amount at Value	[5]	138,066,406	[1]	94,755,383	[7]
Unrealized Appreciation (Depreciation)		$ (5,869,092)	[1]	$ (5,106,853)	[7]
ProShares Ultra Silver [Member] | Forward Agreements with Societe Generale S.A. Based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		1.70%	[1],[3]	1.00%	[4],[7]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[7]
Commitment to (Deliver)/Receive		$ 4,484,000	[1]	$ 3,984,000	[7]
Notional Amount at Value	[5]	72,845,270	[1]	55,063,661	[7]
Unrealized Appreciation (Depreciation)		$ (2,532,729)	[1]	$ (2,704,459)	[7]
ProShares Ultra Silver [Member] | Forward Agreements with UBS AG Based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		1.72%	[1],[3]	0.99%	[4],[7]
Settlement Date		Jan. 10, 2017	[1]	Jan. 6, 2016	[7]
Commitment to (Deliver)/Receive		$ 8,632,000	[1]	$ 7,373,000	[7]
Notional Amount at Value	[5]	140,232,882	[1]	101,903,708	[7]
Unrealized Appreciation (Depreciation)		$ (5,628,359)	[1]	$ (5,393,844)	[7]
ProShares Ultra Silver [Member] | Forward Agreements With Citibank, N.A. based on 0.999 Fine Troy Ounce Silver [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[3]	1.55%
Settlement Date	[1]	Jan. 10, 2017
Commitment to (Deliver)/Receive	[1]	$ 12,327,000
Notional Amount at Value	[1],[5]	200,263,209
Unrealized Appreciation (Depreciation)	[1]	$ (6,946,009)
[1]	The positions and counterparties herein are as of December 31, 2016. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.
[2]	The positions and counterparties herein are as of December 31, 2015. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.
[3]	Reflects the floating financing rate, as of December 31, 2016, on the notional amount of the forward agreement paid to the counterparty or received from the counterparty, excluding any commissions.
[4]	Reflects the floating financing rate, as of December 31, 2015, on the notional amount of the forward agreement paid to the counterparty or received from the counterparty, excluding any commissions.
[5]	For forward agreements, a positive amount represents "long" exposure to the underlying commodity. A negative amount represents "short" exposure to the underlying commodity.
[6]	Reflects the floating financing rate, as of December 31, 2016, on the notional amount of the forward agreement paid to the counterparty or received from the counterparty, excluding any commissions.
[7]	The positions and counterparties herein are as of December 31, 2015. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[8]	Reflects the floating financing rate, as of December 31, 2016 on the notional amount of the forward agreement paid to the counterparty or received from the counterparty, excluding any commissions.

Schedule of Investments - Forei

Schedule of Investments - Foreign Currency Forward Contracts (Detail)

12 Months Ended

Dec. 31, 2016USD ($)

Dec. 31, 2015USD ($)

Dec. 31, 2016JPY (¥)

[3]

Dec. 31, 2016EUR (€)

[1]

Dec. 31, 2015JPY (¥)

Dec. 31, 2015EUR (€)

[2]

ProShares UltraShort Euro [Member] | Contracts to Purchase [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)

$ (60,534)

[1]

$ (1,965,394)

[2]

ProShares UltraShort Euro [Member] | Contracts to Purchase [Member] | Euro with Goldman Sachs International [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[1]

Jan. 8, 2016

[2]

Notional Amount

$ 69,424,004

[1]

$ 140,627,935

[2]

€ 65,899,000

€ 129,386,700

Unrealized Appreciation (Depreciation)

$ 295,605

[1]

$ (1,100,282)

[2]

ProShares UltraShort Euro [Member] | Contracts to Purchase [Member] | Euro with UBS AG [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[1]

Jan. 8, 2016

[2]

Notional Amount

$ 23,557,639

[1]

$ 81,943,430

[2]

22,361,500

75,393,200

Unrealized Appreciation (Depreciation)

(356,139)

[1]

(865,112)

[2]

ProShares UltraShort Euro [Member] | Contracts to Sell [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)

$ 16,223,465

[1]

$ (26,744,942)

[2]

ProShares UltraShort Euro [Member] | Contracts to Sell [Member] | Euro with Goldman Sachs International [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[1]

Jan. 8, 2016

[2]

Notional Amount

$ (414,315,600)

[1]

$ (655,098,912)

[2]

(393,278,725)

(602,732,925)

Unrealized Appreciation (Depreciation)

$ 7,813,462

[1]

$ (13,891,742)

[2]

ProShares UltraShort Euro [Member] | Contracts to Sell [Member] | Euro with UBS AG [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[1]

Jan. 8, 2016

[2]

Notional Amount

$ (376,072,375)

[1]

$ (611,502,135)

[2]

(356,977,300)

(562,621,100)

Unrealized Appreciation (Depreciation)

8,410,003

[1]

(12,853,200)

[2]

ProShares UltraShort Yen [Member] | Contracts to Purchase [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)

$ 90,057

[3]

$ 933,727

[2]

ProShares UltraShort Yen [Member] | Contracts to Purchase [Member] | Yen with Goldman Sachs International [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[3]

Jan. 8, 2016

[2]

Notional Amount

$ 80,581,067

[3]

$ 49,402,434

[2]

¥ 9,411,824,400

¥ 5,938,040,200

[2]

Unrealized Appreciation (Depreciation)

$ 215,477

[3]

$ 319,567

[2]

ProShares UltraShort Yen [Member] | Contracts to Purchase [Member] | Yen with UBS AG [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[3]

Jan. 8, 2016

[2]

Notional Amount

$ 5,783,703

[3]

$ 95,858,003

[2]

675,533,300

11,521,875,200

[2]

Unrealized Appreciation (Depreciation)

(125,420)

[3]

614,160

[2]

ProShares UltraShort Yen [Member] | Contracts to Sell [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)

$ 16,654,880

[3]

$ (14,829,179)

[2]

ProShares UltraShort Yen [Member] | Contracts to Sell [Member] | Yen with Goldman Sachs International [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[3]

Jan. 8, 2016

[2]

Notional Amount

$ (354,548,372)

[3]

$ (280,344,651)

[2]

(41,411,055,600)

(33,696,676,000)

[2]

Unrealized Appreciation (Depreciation)

$ 8,041,302

[3]

$ (6,789,972)

[2]

ProShares UltraShort Yen [Member] | Contracts to Sell [Member] | Yen with UBS AG [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[3]

Jan. 8, 2016

[2]

Notional Amount

$ (284,180,901)

[3]

$ (339,880,862)

[2]

(33,192,173,500)

(40,852,769,100)

[2]

Unrealized Appreciation (Depreciation)

8,613,578

[3]

(8,039,207)

[2]

ProShares Ultra Euro [Member] | Contracts to Purchase [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)

$ (573,401)

[1]

$ 587,231

[2]

ProShares Ultra Euro [Member] | Contracts to Purchase [Member] | Euro with Goldman Sachs International [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[1]

Jan. 8, 2016

[2]

Notional Amount

$ 10,368,169

[1]

$ 13,533,325

[2]

9,841,725

12,451,525

Unrealized Appreciation (Depreciation)

$ (236,099)

[1]

$ 298,929

[2]

ProShares Ultra Euro [Member] | Contracts to Purchase [Member] | Euro with UBS AG [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[1]

Jan. 8, 2016

[2]

Notional Amount

$ 14,511,417

[1]

$ 12,519,346

[2]

13,774,600

11,518,600

Unrealized Appreciation (Depreciation)

(337,302)

[1]

288,302

[2]

ProShares Ultra Euro [Member] | Contracts to Sell [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)

$ (609)

[1]

$ 17,689

[2]

ProShares Ultra Euro [Member] | Contracts to Sell [Member] | Euro with Goldman Sachs International [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[1]

Jan. 8, 2016

[2]

Notional Amount

$ (756,196)

[1]

$ (3,728,762)

[2]

(717,800)

(3,430,700)

Unrealized Appreciation (Depreciation)

$ (3,157)

[1]

$ 16,425

[2]

ProShares Ultra Euro [Member] | Contracts to Sell [Member] | Euro with UBS AG [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[1]

Jan. 8, 2016

[2]

Notional Amount

$ (278,122)

[1]

$ (603,328)

[2]

€ (264,000)

€ (555,100)

Unrealized Appreciation (Depreciation)

2,548

[1]

1,264

[2]

ProShares Ultra Yen [Member] | Contracts to Purchase [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)

$ (342,455)

[3]

$ 267,014

[2]

ProShares Ultra Yen [Member] | Contracts to Purchase [Member] | Yen with Goldman Sachs International [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[3]

Jan. 8, 2016

[2]

Notional Amount

$ 7,572,024

[3]

$ 7,210,368

[2]

884,408,200

866,666,900

[2]

Unrealized Appreciation (Depreciation)

$ (220,115)

[3]

$ 172,891

[2]

ProShares Ultra Yen [Member] | Contracts to Purchase [Member] | Yen with UBS AG [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[3]

Jan. 8, 2016

[2]

Notional Amount

$ 4,025,524

[3]

$ 4,067,664

[2]

470,179,000

488,922,300

[2]

Unrealized Appreciation (Depreciation)

(122,340)

[3]

94,123

[2]

ProShares Ultra Yen [Member] | Contracts to Sell [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)

$ 379

[3]

$ (5,703)

[2]

ProShares Ultra Yen [Member] | Contracts to Sell [Member] | Yen with Goldman Sachs International [Member]

Schedule of Investments [Line Items]

Settlement Date

Jan. 13, 2017

[3]

Jan. 8, 2016

[2]

Notional Amount

$ (488,372)

[3]

$ (156,666)

[2]

¥ (57,041,600)

(18,830,800)

[2]

Unrealized Appreciation (Depreciation)

$ 379

[3]

$ (3,104)

[2]

ProShares Ultra Yen [Member] | Contracts to Sell [Member] | Yen with UBS AG [Member]

Schedule of Investments [Line Items]

Settlement Date

[2]

Jan. 8, 2016

Notional Amount

[2]

$ (175,547)

¥ (21,100,300)

Unrealized Appreciation (Depreciation)

[2]

$ (2,599)

[1]

The positions and counterparties herein are as of December 31, 2016. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.

[2]

The positions and counterparties herein are as of December 31, 2015. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.

[3]

The positions and counterparties herein are as of December 31, 2016. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at anytime.

Organization - Additional Infor

Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016USD ($)Trustshares
Organization [Line Items]
Number of series of Trust | Trust	18
Number of shares of each Leveraged Fund | shares	14
Aggregate purchase price of each Leveraged Fund	$ 350
Period for expected multiple returns	1 day
ProShares UltraShort Bloomberg Crude Oil [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	$ 350
ProShares UltraShort Gold [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	350
ProShares UltraShort Silver [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	350
ProShares UltraShort Euro [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	350
ProShares UltraShort Yen [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	350
ProShares Ultra Bloomberg Crude Oil [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	350
ProShares Ultra Gold [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	350
ProShares Ultra Silver [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	350
ProShares Ultra Euro [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	350
ProShares Ultra Yen [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	$ 350

Organization - Schedule of Shar

Organization - Schedule of Share Splits and Reverse Share Splits (Detail)	12 Months Ended
	Dec. 31, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | January 21, 2014 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jan. 21, 2014
Date Trading Resumed at Post- Split Price	Jan. 24, 2014
Type of Split	2-for-1 Share split
ProShares Ultra VIX Short-Term Futures ETF [Member] | January 21, 2014 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jan. 21, 2014
Date Trading Resumed at Post- Split Price	Jan. 24, 2014
Type of Split	1-for-4 reverse Share split
ProShares Ultra VIX Short-Term Futures ETF [Member] | May 20, 2015 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	May 20, 2015
Date Trading Resumed at Post- Split Price	May 20, 2015
Type of Split	1-for-5 reverse Share split
ProShares Ultra VIX Short-Term Futures ETF [Member] | July 25, 2016 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jul. 25, 2016
Date Trading Resumed at Post- Split Price	Jul. 25, 2016
Type of Split	1-for-5 reverse Share split
ProShares Ultra Silver [Member] | January 21, 2014 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jan. 21, 2014
Date Trading Resumed at Post- Split Price	Jan. 24, 2014
Type of Split	1-for-4 reverse Share split
ProShares VIX Mid-Term Futures ETF [Member] | November 6, 2014 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Nov. 6, 2014
Date Trading Resumed at Post- Split Price	Nov. 6, 2014
Type of Split	1-for-4 reverse Share split
ProShares Ultra Bloomberg Crude Oil [Member] | May 20, 2015 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	May 20, 2015
Date Trading Resumed at Post- Split Price	May 20, 2015
Type of Split	1-for-5 reverse Share split
ProShares Ultra Bloomberg Natural Gas [Member] | May 20, 2015 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	May 20, 2015
Date Trading Resumed at Post- Split Price	May 20, 2015
Type of Split	1-for-4 reverse Share split
ProShares Ultra Yen [Member] | May 20, 2015 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	May 20, 2015
Date Trading Resumed at Post- Split Price	May 20, 2015
Type of Split	1-for-4 reverse Share split
ProShares UltraShort Silver [Member] | November 13, 2015 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Nov. 13, 2015
Date Trading Resumed at Post- Split Price	Nov. 13, 2015
Type of Split	2-for-1 Share split
ProShares UltraShort Bloomberg Natural Gas [Member] | July 20, 2016 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jul. 20, 2016
Date Trading Resumed at Post- Split Price	Jul. 25, 2016
Type of Split	3-for-1 Share split
ProShares VIX Short-Term Futures ETF [Member] | July 25, 2016 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	Jul. 25, 2016
Date Trading Resumed at Post- Split Price	Jul. 25, 2016
Type of Split	1-for-5 reverse Share split

Significant Accounting Polici34

Significant Accounting Policies - Cut-off Times and Times of Calculation of Funds' Final Net Asset Value for Creation and Redemption of Fund Shares (Detail)	12 Months Ended
	Dec. 31, 2016
ProShares UltraShort Silver [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	6:30 a.m.
NAV Calculation Time	7:00 a.m.
NAV Calculation Date	December 30
ProShares Ultra Silver [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	6:30 a.m.
NAV Calculation Time	7:00 a.m.
NAV Calculation Date	December 30
ProShares UltraShort Gold [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	9:30 a.m.
NAV Calculation Time	10:00 a.m.
NAV Calculation Date	December 30
ProShares Ultra Gold [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	9:30 a.m.
NAV Calculation Time	10:00 a.m.
NAV Calculation Date	December 30
ProShares UltraShort Bloomberg Crude Oil [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	2:30 p.m.
NAV Calculation Date	December 30
ProShares Ultra Bloomberg Crude Oil [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	2:30 p.m.
NAV Calculation Date	December 30
ProShares UltraShort Bloomberg Natural Gas [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	2:30 p.m.
NAV Calculation Date	December 30
ProShares Ultra Bloomberg Natural Gas [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	2:30 p.m.
NAV Calculation Date	December 30
ProShares UltraShort Australian Dollar [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
NAV Calculation Date	December 30
ProShares Short Euro [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
NAV Calculation Date	December 30
ProShares UltraShort Euro [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
NAV Calculation Date	December 30
ProShares Ultra Euro [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
NAV Calculation Date	December 30
ProShares UltraShort Yen [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
NAV Calculation Date	December 30
ProShares Ultra Yen [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	3:00 p.m.
NAV Calculation Time	4:00 p.m.
NAV Calculation Date	December 30
ProShares Short VIX Short-Term Futures ETF [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	4:15 p.m.
NAV Calculation Date	December 30
ProShares Ultra VIX Short-Term Futures ETF [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	4:15 p.m.
NAV Calculation Date	December 30
ProShares VIX Mid-Term Futures ETF [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	2:00 p.m.
NAV Calculation Time	4:15 p.m.
NAV Calculation Date	December 30

Significant Accounting Polici35

Significant Accounting Policies - Valuation of Investments using Fair Value Hierarchy (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
ProShares VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	$ 147,522,581	$ 94,995,034
ProShares VIX Mid-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	44,197,990	25,631,927
ProShares Short VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	160,086,825	546,139,133
ProShares Ultra VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	426,699,558	450,252,315
ProShares UltraShort Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	192,060,689	88,569,811
ProShares UltraShort Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	2,417,120	5,643,840
ProShares UltraShort Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	63,593,101	74,794,067
ProShares UltraShort Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	22,961,875	55,514,479
ProShares Short Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	13,297,728	15,396,649
ProShares UltraShort Australian Dollar [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	14,091,959	17,988,624
ProShares UltraShort Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	353,538,718	517,456,440
ProShares UltraShort Yen [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	273,847,250	246,101,549
ProShares Ultra Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	945,945,743	707,544,640
ProShares Ultra Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	38,720,368	33,120,610
ProShares Ultra Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	90,906,554	69,656,792
ProShares Ultra Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	274,297,250	216,329,495
ProShares Ultra Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	11,317,821	12,210,182
ProShares Ultra Yen [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	4,940,803	5,330,802
Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	3,080,443,933	3,182,676,389
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	147,991,233	96,073,659
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	45,486,235	25,976,287
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	170,396,436	535,392,718
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	434,671,795	438,357,849
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	205,694,385	79,692,642
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	2,899,151	8,115,004
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares UltraShort Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	60,540,555	72,979,905
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares UltraShort Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	21,550,319	50,730,230
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Short Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	13,164,828	15,153,211
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares UltraShort Australian Dollar [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	12,909,619	18,408,894
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares UltraShort Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	337,375,787	546,166,776
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares UltraShort Yen [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	257,102,313	259,997,001
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	885,050,007	797,650,543
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	36,183,648	26,807,731
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Ultra Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	95,356,621	71,912,587
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Ultra Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	295,300,799	238,899,626
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Ultra Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	11,891,831	11,605,262
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Ultra Yen [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	5,282,879	5,069,491
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	3,038,848,441	3,298,989,416
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(468,652)	(1,078,625)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(1,288,245)	(344,360)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(10,309,611)	10,746,415
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(7,972,237)	11,894,466
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(1,426,815)	2,464,513
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(482,031)	(2,471,164)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	18,980	5,220
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	27,310	5,970
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Short Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	132,900	243,438
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	1,182,340	(420,270)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	5,537,165	(17,929,314)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	2,536,720	6,312,879
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(18,960)	(5,200)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(27,360)	(9,030)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(12,558,496)	9,414,938
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | ProShares UltraShort Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	3,033,566	1,808,942
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | ProShares UltraShort Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	1,384,246	4,778,279
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | ProShares Ultra Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(4,431,107)	(2,250,595)
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | ProShares Ultra Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(20,976,189)	(22,561,101)
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(20,989,484)	(18,224,475)
Level II - Other Significant Observable Inputs [Member] | Foreign Currency Forward Contracts [Member] | ProShares UltraShort Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	16,162,931	(28,710,336)
Level II - Other Significant Observable Inputs [Member] | Foreign Currency Forward Contracts [Member] | ProShares UltraShort Yen [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	16,744,937	(13,895,452)
Level II - Other Significant Observable Inputs [Member] | Foreign Currency Forward Contracts [Member] | ProShares Ultra Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(574,010)	604,920
Level II - Other Significant Observable Inputs [Member] | Foreign Currency Forward Contracts [Member] | ProShares Ultra Yen [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(342,076)	261,311
Level II - Other Significant Observable Inputs [Member] | Foreign Currency Forward Contracts [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	31,991,782	(41,739,557)
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(12,206,881)	6,412,656
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	55,358,571	(72,176,589)
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	$ 43,151,690	$ (65,763,933)

Significant Accounting Polici36

Significant Accounting Policies - Additional Information (Detail) - USD ($)	Jul. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Significant Accounting Policies [Line Items]
Level III portfolio investments		$ 0	$ 0
Minimum [Member] | Volatility Index Fund [Member]
Significant Accounting Policies [Line Items]
Percentage of brokerage commissions exceed variable create/redeem fees	0.02%

Investments - Fair Value of Der

Investments - Fair Value of Derivative Instruments (Detail) - USD ($)		Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	$ 118,541,276	$ 46,547,274	[2]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	76,945,784	162,860,301	[2]
VIX Futures Contracts [Member] | Payable on Open Futures Contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	1,356,620	354,365
VIX Futures Contracts [Member] | Payable on Open Futures Contracts [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	10,309,611	58,830
VIX Futures Contracts [Member] | Payable on Open Futures Contracts [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	2,742,526	1,078,625
VIX Futures Contracts [Member] | Payable on Open Futures Contracts [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	21,567,112
VIX Futures Contracts [Member] | Receivables on Open Futures Contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	68,375	10,005
VIX Futures Contracts [Member] | Receivables on Open Futures Contracts [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		10,805,245
VIX Futures Contracts [Member] | Receivables on Open Futures Contracts [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	2,273,874
VIX Futures Contracts [Member] | Receivables on Open Futures Contracts [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	13,594,875	11,894,466
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	4,450,067	2,255,795
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]		90,105,903
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	482,031	2,471,164
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	21,003,549	22,570,131
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]	13,633,696
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swaps and/ or Forwards Agreements [Member] | ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	1,411,556	4,784,249
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swaps and/ or Forwards Agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	60,895,736
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swaps and/ or Forwards Agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		8,877,169
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swaps and/ or Forwards Agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	2,536,720	6,312,879
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swaps and/ or Forwards Agreements [Member] | ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	3,052,546	1,814,162
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation		356,139	28,710,336
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation		125,420	14,829,179
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation		576,558
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation		342,455	5,703
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts and Payable on Open Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1]		420,270
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		16,519,070
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		16,870,357	933,727
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		2,548	604,920
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		379	267,014
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares Short Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	132,900	$ 243,438
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts and Receivables on Open Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	$ 1,182,340
[1]	Includes cumulative appreciation/depreciation of futures contracts as reported in the Schedules of Investments. Only current day's variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures contracts.
[2]	Amounts exclude the activity of: ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016.

Investments - Effect of Derivat

Investments - 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]
Realized Gain (Loss) on Derivatives Recognized in Income	$ (1,319,878,684)	$ (1,164,748,605)	$ (160,205,460)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	157,908,519	(39,455,078)	(46,383,766)
VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts / Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(195,475,791)	(19,408,543)	(694,347)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	609,973	(7,343,245)	22,917,306
VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts / Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(11,085,506)	(3,335,936)	(14,378,810)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(943,885)	(605,025)	5,157,354
VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts / Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	440,391,389	69,793,028	76,925,998
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(21,056,026)	27,098,564	(24,469,104)
VIX Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts / Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(1,567,340,688)	(392,174,228)	(139,412,525)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(19,866,703)	(27,690,787)	63,595,164
Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/or Forward Agreements/Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/or Forward Agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(67,752,164)	91,670,324	99,327,097
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(22,510,865)	(33,947,511)	46,390,353
Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/or Forward Agreements/Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/or Forward Agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	586,860	15,212,804	8,791,719
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	1,989,133	(6,412,629)	2,899,165
Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/or Forward Agreements/Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/or Forward Agreements [Member] | ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(12,240,751)	12,707,635	(5,316,482)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	1,238,384	4,101,460	(7,934,871)
Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/or Forward Agreements/Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/or Forward Agreements [Member] | ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(17,554,714)	10,759,545	15,114,883
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(3,372,693)	4,187,736	2,810,170
Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/or Forward Agreements/Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/or Forward Agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	74,061,040	(896,177,096)	(243,325,957)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	151,001,639	32,549,981	(125,240,438)
Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/or Forward Agreements/Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/or Forward Agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	17,571,809	(100,776,817)	(6,464,796)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(3,776,159)	41,202,162	(31,232,744)
Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/or Forward Agreements/Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/or Forward Agreements [Member] | ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	5,816,565	(18,605,815)	(9,674,333)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(2,194,272)	(4,311,529)	8,883,268
Commodity Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts, Swap and/or Forward Agreements/Changes in Unrealized Appreciation/ Depreciation on Futures Contracts, Swap and/or Forward Agreements [Member] | ProShares Ultra Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	62,342,441	(78,309,309)	(155,551,420)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	1,566,582	(10,173,451)	(9,889,600)
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts [Member] | ProShares Short Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	663,774	1,559,425	1,593,048
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(110,538)	(141,893)	418,562
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(2,787,204)	4,330,463	2,296,216
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	1,602,610	(1,163,751)	(174,124)
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(25,711,518)	131,651,572	83,678,955
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	44,873,267	(45,473,330)	30,511,501
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(22,220,271)	8,809,464	127,846,225
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	30,640,389	(12,316,677)	(30,965,459)
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	138,959	(1,982,208)	(420,533)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(1,178,930)	708,291	(204,333)
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/or foreign currency forward contracts/changes in unrealized appreciation/ depreciation on futures and/or foreign currency forward contracts [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	717,086	(472,913)	(540,398)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	$ (603,387)	$ 276,556	$ 144,064

Investments - Offsetting of Fin

Investments - Offsetting of Financial Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition		$ 6,412,656
Gross Amounts Offset in the Statements of Financial Condition	$ 0	0
Net Amounts of Assets presented in the Statements of Financial Condition		6,412,656
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	12,206,881
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	12,206,881
ProShares UltraShort Gold [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	3,033,566	1,808,942
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	3,033,566	1,808,942
Gross Amounts Offset in the Statements of Financial Condition	0	0
ProShares UltraShort Silver [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	1,384,246	4,778,279
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	1,384,246	4,778,279
Gross Amounts Offset in the Statements of Financial Condition	0	0
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	16,519,070
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	16,519,070
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	356,139	28,710,336
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	356,139	28,710,336
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	16,870,357	933,727
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	16,870,357	933,727
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	125,420	14,829,179
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	125,420	14,829,179
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	55,358,571
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	55,358,571
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition		72,176,589
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition		72,176,589
ProShares Ultra Gold [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts Offset in the Statements of Financial Condition	0	0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	4,431,107	2,250,595
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	4,431,107	2,250,595
ProShares Ultra Silver [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts Offset in the Statements of Financial Condition	0	0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	20,976,189	22,561,101
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	20,976,189	22,561,101
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	2,548	604,920
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	2,548	604,920
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	576,558
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	576,558
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	379	267,014
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	379	267,014
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	342,455	5,703
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	$ 342,455	$ 5,703

Investments - Gross Amounts Not

Investments - Gross Amounts Not Offset in Statements of Financial Condition (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
ProShares UltraShort Gold [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		$ 1,046,664
Cash Collateral for the Benefit of (the Funds) / the Counterparties		(1,046,664)
ProShares UltraShort Gold [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	$ 881,454	158,827
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(874,948)
Net Amounts of Assets presented in the Statements of Financial Condition	6,506	158,827
ProShares UltraShort Gold [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	393,006	212,680
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(393,006)	(212,680)
ProShares UltraShort Gold [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	611,295	386,856
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(386,856)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(611,295)
ProShares UltraShort Gold [Member] | Citibank N.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	1,147,811	3,915
Net Amounts of Assets presented in the Statements of Financial Condition	1,147,811	3,915
ProShares UltraShort Silver [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		2,500,263
Cash Collateral for the Benefit of (the Funds) / the Counterparties		(2,500,000)
Net Amounts of Assets presented in the Statements of Financial Condition		263
ProShares UltraShort Silver [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	323,829	1,044,986
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(323,829)	(858,460)
Net Amounts of Assets presented in the Statements of Financial Condition		186,526
ProShares UltraShort Silver [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	86,543	438,975
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(86,543)	(438,975)
ProShares UltraShort Silver [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	363,396	794,055
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(582,692)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(363,396)
Net Amounts of Assets presented in the Statements of Financial Condition		211,363
ProShares UltraShort Silver [Member] | Citibank N.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	610,478
Net Amounts of Assets presented in the Statements of Financial Condition	610,478
ProShares UltraShort Yen [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	8,256,779
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(7,771,819)
Net Amounts of Assets presented in the Statements of Financial Condition	484,960
Amounts of Recognized Assets presented in the Statements of Financial Condition		(6,470,405)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		6,470,405
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares UltraShort Yen [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	8,488,158
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(7,980,000)
Net Amounts of Assets presented in the Statements of Financial Condition	508,158
Amounts of Recognized Assets presented in the Statements of Financial Condition		(7,425,047)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		7,425,047
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Bloomberg Crude Oil [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		(20,221,872)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		20,221,872
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Bloomberg Crude Oil [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		(20,806,119)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		20,806,119
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Bloomberg Crude Oil [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		(6,357,459)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		6,357,459
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Bloomberg Crude Oil [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		(22,281,150)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		22,281,150
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Bloomberg Crude Oil [Member] | Citibank N.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		(2,509,989)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		2,509,989
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Silver [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		(9,355,945)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		9,355,945
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Silver [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	(5,869,092)	(5,106,853)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	5,869,092	5,106,853
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Silver [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	(2,532,729)	(2,704,459)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	2,532,729	2,704,459
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Silver [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	(5,628,359)	(5,393,844)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	5,628,359	5,393,844
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Silver [Member] | Citibank N.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	(6,946,009)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	6,946,009
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares Ultra Euro [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		315,354
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(315,354)
Amounts of Recognized Assets presented in the Statements of Financial Condition	(239,256)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	239,256
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares Ultra Euro [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		289,566
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(289,566)
Amounts of Recognized Assets presented in the Statements of Financial Condition	(334,754)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	334,754
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares Ultra Yen [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		169,787
Net Amounts of Assets presented in the Statements of Financial Condition		169,787
Amounts of Recognized Assets presented in the Statements of Financial Condition	(219,736)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	219,736
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares Ultra Yen [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		91,524
Net Amounts of Assets presented in the Statements of Financial Condition		91,524
Amounts of Recognized Assets presented in the Statements of Financial Condition	(122,340)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	122,340
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares UltraShort Bloomberg Crude Oil [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		1,722,894
Cash Collateral for the Benefit of (the Funds) / the Counterparties		(1,722,894)
ProShares UltraShort Bloomberg Crude Oil [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	14,016,906	1,595,552
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(14,016,906)	(1,595,552)
Amounts of Recognized Assets presented in the Statements of Financial Condition	(3,061,395)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	3,061,395
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares UltraShort Bloomberg Crude Oil [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	8,661,821	521,142
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(8,661,821)	(521,142)
Amounts of Recognized Assets presented in the Statements of Financial Condition	(1,050,699)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	1,050,699
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares UltraShort Bloomberg Crude Oil [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	14,252,835	1,474,790
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(1,474,790)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(14,252,835)
Amounts of Recognized Assets presented in the Statements of Financial Condition	(3,352,596)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	3,352,596
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares UltraShort Bloomberg Crude Oil [Member] | Citibank N.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	18,427,009	1,098,278
Net Amounts of Assets presented in the Statements of Financial Condition	18,427,009	1,098,278
Amounts of Recognized Assets presented in the Statements of Financial Condition	(4,742,191)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	4,742,191
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares UltraShort Euro [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	8,109,067
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(8,109,067)
Amounts of Recognized Assets presented in the Statements of Financial Condition		(14,992,024)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		14,992,024
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares UltraShort Euro [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	8,053,864
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(8,053,864)
Amounts of Recognized Assets presented in the Statements of Financial Condition		(13,718,312)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		13,718,312
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Gold [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		(1,049,383)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		1,049,383
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares Ultra Gold [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	(1,112,916)	(520,730)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	1,112,916	520,730
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Gold [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	(643,587)	(244,992)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	643,587	244,992
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Gold [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	(1,209,622)	(430,876)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	1,209,622	430,876
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Gold [Member] | Citibank N.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	(1,464,982)	(4,614)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	1,464,982
Cash Collateral for the Benefit of (the Funds) / the Counterparties	$ 0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition		$ (4,614)

Agreements - Additional Informa

Agreements - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016USD ($)
Health Care Trust Fund [Line Items]
Ceiling for legal fees	$ 100,000
Percentage of annual NAV as limit to pay SEC registration fees incurred	0.021%
Ceiling for per annum K-1 preparation and mailing fees against annual net assets of Fund	0.10%
Leverage Fund [Member]
Health Care Trust Fund [Line Items]
Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund	0.95%
Geared Vix Fund [Member]
Health Care Trust Fund [Line Items]
Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund	0.95%
Short Euro Fund [Member]
Health Care Trust Fund [Line Items]
Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund	0.95%
Volatility Index Fund [Member]
Health Care Trust Fund [Line Items]
Management Fee paid to sponsor, percent per annum of the average daily NAV of each Geared Fund	0.85%

Offering Costs - Additional Inf

Offering Costs - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Offering costs, amortization period	12 months

Creation and Redemption of Cr43

Creation and Redemption of Creation Units - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016$ / EquityUnitshares
Creation And Redemption Of Creation Units [Line Items]
Creation Unit, block Shares of a Fund	50,000
Fixed transaction fee per Creation Unit | $ / EquityUnit	500
Variable transaction fee, percent of the value of the Creation Unit, maximum	0.10%
Volatility Index Fund [Member]
Creation And Redemption Of Creation Units [Line Items]
Creation Unit, block Shares of a Fund	25,000
Variable transaction fee, percent of the value of the Creation Unit, maximum	0.05%

Creation and Redemption of Cr44

Creation and Redemption of Creation Units - Schedule of Transaction Fees (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	[1]	$ 3,906,425	$ 3,193,283	$ 1,805,044
ProShares VIX Short-Term Futures ETF [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		229,699	105,024	72,020
ProShares VIX Mid-Term Futures ETF [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		24,056	8,521	8,927
ProShares Short VIX Short-Term Futures ETF [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		801,564	342,734	218,121
ProShares Ultra VIX Short-Term Futures ETF [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		1,822,247	1,391,292	734,298
ProShares UltraShort Bloomberg Crude Oil [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		398,027	382,054	257,458
ProShares UltraShort Bloomberg Natural Gas [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		8,989	8,853	26,053
ProShares UltraShort Gold [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		29,854	11,024	32,473
ProShares UltraShort Silver [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		16,729	39,354	48,832
ProShares Ultra Bloomberg Crude Oil [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		504,533	847,422	299,493
ProShares Ultra Bloomberg Natural Gas [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		9,175	13,939	30,073
ProShares Ultra Gold [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		14,138	4,218	12,088
ProShares Ultra Silver [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees		$ 47,414	$ 38,848	$ 65,208
[1]	Amounts exclude the activity of ProShares Ultra Australian Dollar which liquidated on June 29, 2015, ProShares Managed Futures Strategy which liquidated on March 30, 2016, ProShares UltraShort Bloomberg Commodity and ProShares Ultra Bloomberg Commodity which liquidated on September 1, 2016.

Financial Highlights - Per Shar

Financial Highlights - Per Share Operating Performance (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ProShares VIX Short-Term Futures ETF [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 66.21	$ 104.6604	$ 142.6934
Net investment income (loss)	(0.2754)	(0.6622)	(1.0237)
Net realized and unrealized gain (loss)	(44.7209)	(37.7873)	(37.0093)
Change in net asset value from operations	(44.9963)	(38.4495)	(38.0330)
Net asset value, ending balance	21.21	66.21	104.6604
Market value per share, beginning balance	66.65	104.95	142.65
Market value per share, ending balance	$ 21.26	$ 66.65	$ 104.95
Total Return, at net asset value	(68.00%)	(36.70%)	(26.70%)
Total Return, at market value	(68.10%)	(36.50%)	(26.40%)
Ratios to Average Net Assets
Expense ratio	0.99%	0.95%	0.92%
Expense ratio, excluding brokerage commissions	0.85%	0.85%	0.85%
Net investment income (loss)	(0.75%)	(0.92%)	(0.88%)
ProShares VIX Mid-Term Futures ETF [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 53.96	$ 63.6020	$ 77.1837
Net investment income (loss)	(0.3333)	(0.5053)	(0.5666)
Net realized and unrealized gain (loss)	(11.4932)	(9.1341)	(13.0151)
Change in net asset value from operations	(11.8265)	(9.6394)	(13.5817)
Net asset value, ending balance	42.14	53.96	63.6020
Market value per share, beginning balance	53.99	63.89	77.16
Market value per share, ending balance	$ 42.34	$ 53.99	$ 63.89
Total Return, at net asset value	(21.90%)	(15.20%)	(17.60%)
Total Return, at market value	(21.60%)	(15.50%)	(17.20%)
Ratios to Average Net Assets
Expense ratio	0.93%	0.91%	0.87%
Expense ratio, excluding brokerage commissions	0.85%	0.85%	0.85%
Net investment income (loss)	(0.68%)	(0.88%)	(0.84%)
ProShares Short VIX Short-Term Futures ETF [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 50.81	$ 61.4004	$ 67.4993
Net investment income (loss)	(0.6090)	(0.8162)	(1.0247)
Net realized and unrealized gain (loss)	41.0242	(9.7692)	(5.0742)
Change in net asset value from operations	40.4152	(10.5854)	(6.0989)
Net asset value, ending balance	91.23	50.81	61.4004
Market value per share, beginning balance	50.45	61.16	67.47
Market value per share, ending balance	$ 90.98	$ 50.45	$ 61.16
Total Return, at net asset value	79.50%	(17.20%)	(9.00%)
Total Return, at market value	80.30%	(17.50%)	(9.40%)
Ratios to Average Net Assets
Expense ratio	1.39%	1.40%	1.49%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(1.15%)	(1.36%)	(1.46%)
ProShares Ultra VIX Short-Term Futures ETF [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 702.10	$ 3,136.4730	$ 8,385.5437
Net investment income (loss)	(1.9193)	(18.0602)	(72.6365)
Net realized and unrealized gain (loss)	(656.7016)	(2,416.3103)	(5,176.4342)
Change in net asset value from operations	(658.6209)	(2,434.3705)	(5,249.0707)
Net asset value, ending balance	43.48	702.10	3,136.4730
Market value per share, beginning balance	708.75	3,143.75	8,390
Market value per share, ending balance	$ 43.75	$ 708.75	$ 3,143.75
Total Return, at net asset value	(93.80%)	(77.60%)	(62.60%)
Total Return, at market value	(93.80%)	(77.50%)	(62.50%)
Ratios to Average Net Assets
Expense ratio	1.57%	1.65%	1.80%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(1.32%)	(1.61%)	(1.78%)
ProShares UltraShort Bloomberg Crude Oil [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 66.60	$ 38.9895	$ 15.8651
Net investment income (loss)	(0.3600)	(0.3924)	(0.1387)
Net realized and unrealized gain (loss)	(34.5434)	28.0038	23.2631
Change in net asset value from operations	(34.9034)	27.6114	23.1244
Net asset value, ending balance	31.70	66.60	38.9895
Market value per share, beginning balance	66.82	38.26	15.79
Market value per share, ending balance	$ 31.65	$ 66.82	$ 38.26
Total Return, at net asset value	(52.40%)	70.80%	145.80%
Total Return, at market value	(52.60%)	74.60%	142.30%
Ratios to Average Net Assets
Expense ratio	1.03%	1.07%	0.98%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.76%)	(1.04%)	(0.94%)
ProShares UltraShort Bloomberg Natural Gas [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 46.53	$ 27.9859	$ 23.3212
Net investment income (loss)	(0.6812)	(0.4438)	(0.1654)
Net realized and unrealized gain (loss)	(22.7492)	18.9893	4.8301
Change in net asset value from operations	(23.4304)	18.5455	4.6647
Net asset value, ending balance	23.10	46.53	27.9859
Market value per share, beginning balance	46.55	27.34	23.12
Market value per share, ending balance	$ 23.05	$ 46.55	$ 27.34
Total Return, at net asset value	(50.40%)	66.30%	20.00%
Total Return, at market value	(50.50%)	70.30%	18.30%
Ratios to Average Net Assets
Expense ratio	1.65%	1.55%	1.18%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(1.43%)	(1.50%)	(1.14%)
ProShares UltraShort Gold [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 115.88	$ 96.6516	$ 103.5180
Net investment income (loss)	(0.5542)	(0.9149)	(0.8233)
Net realized and unrealized gain (loss)	(23.9976)	20.1432	(6.0431)
Change in net asset value from operations	(24.5518)	19.2283	(6.8664)
Net asset value, ending balance	91.33	115.88	96.6516
Market value per share, beginning balance	115.83	100.22	103.53
Market value per share, ending balance	$ 90.54	$ 115.83	$ 100.22
Total Return, at net asset value	(21.20%)	19.90%	(6.60%)
Total Return, at market value	(21.80%)	15.60%	(3.20%)
Ratios to Average Net Assets
Expense ratio	0.95%	0.95%	0.95%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.70%)	(0.91%)	(0.91%)
ProShares UltraShort Silver [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 64.58	$ 57.8071	$ 44.8910
Net investment income (loss)	(0.2641)	(0.4968)	(0.3937)
Net realized and unrealized gain (loss)	(27.0070)	7.2680	13.3098
Change in net asset value from operations	(27.2711)	6.7712	12.9161
Net asset value, ending balance	37.31	64.58	57.8071
Market value per share, beginning balance	64.55	59.70	45.10
Market value per share, ending balance	$ 38.76	$ 64.55	$ 59.70
Total Return, at net asset value	(42.20%)	11.70%	28.80%
Total Return, at market value	(40.00%)	8.10%	32.40%
Ratios to Average Net Assets
Expense ratio	0.95%	0.95%	0.95%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.70%)	(0.91%)	(0.90%)
ProShares Short Euro [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 43.78	$ 40.0617	$ 35.5867
Net investment income (loss)	(0.3268)	(0.4096)	(0.3428)
Net realized and unrealized gain (loss)	1.6075	4.1246	4.8178
Change in net asset value from operations	1.2807	3.7150	4.4750
Net asset value, ending balance	45.06	43.78	40.0617
Market value per share, beginning balance	43.74	40.03	35.66
Market value per share, ending balance	$ 45.12	$ 43.74	$ 40.03
Total Return, at net asset value	2.90%	9.30%	12.60%
Total Return, at market value	3.20%	9.30%	12.30%
Ratios to Average Net Assets
Expense ratio	0.97%	0.97%	0.96%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.76%)	(0.95%)	(0.93%)
ProShares UltraShort Australian Dollar [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 58.46	$ 51.3790	$ 46.6384
Net investment income (loss)	(0.4268)	(0.5741)	(0.4272)
Net realized and unrealized gain (loss)	(2.6532)	7.6533	5.1678
Change in net asset value from operations	(3.0800)	7.0792	4.7406
Net asset value, ending balance	55.38	58.46	51.3790
Market value per share, beginning balance	58.15	51.37	46.66
Market value per share, ending balance	$ 55.24	$ 58.15	$ 51.37
Total Return, at net asset value	(5.30%)	13.80%	10.20%
Total Return, at market value	(5.00%)	13.20%	10.10%
Ratios to Average Net Assets
Expense ratio	1.03%	1.03%	1.01%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.79%)	(1.00%)	(0.97%)
ProShares UltraShort Euro [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 25.54	$ 21.5946	$ 17.0613
Net investment income (loss)	(0.1703)	(0.2256)	(0.1642)
Net realized and unrealized gain (loss)	1.7144	4.1716	4.6975
Change in net asset value from operations	1.5441	3.9460	4.5333
Net asset value, ending balance	27.08	25.54	21.5946
Market value per share, beginning balance	25.53	21.61	17.06
Market value per share, ending balance	$ 27.08	$ 25.53	$ 21.61
Total Return, at net asset value	6.00%	18.30%	26.60%
Total Return, at market value	6.10%	18.10%	26.70%
Ratios to Average Net Assets
Expense ratio	0.95%	0.95%	0.95%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.70%)	(0.90%)	(0.90%)
ProShares UltraShort Yen [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 87.94	$ 89.3336	$ 70.8640
Net investment income (loss)	(0.4974)	(0.8243)	(0.6412)
Net realized and unrealized gain (loss)	(7.1984)	(0.5704)	19.1108
Change in net asset value from operations	(7.6958)	(1.3947)	18.4696
Net asset value, ending balance	80.24	87.94	89.3336
Market value per share, beginning balance	87.89	89.30	70.91
Market value per share, ending balance	$ 80.25	$ 87.89	$ 89.30
Total Return, at net asset value	(8.80%)	(1.60%)	26.10%
Total Return, at market value	(8.70%)	(1.60%)	25.90%
Ratios to Average Net Assets
Expense ratio	0.95%	0.95%	0.95%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.71%)	(0.92%)	(0.90%)
ProShares Ultra Bloomberg Crude Oil [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 25.15	$ 101.4800	$ 320.8990
Net investment income (loss)	(0.1534)	(0.5621)	(2.1856)
Net realized and unrealized gain (loss)	(1.6662)	(75.7631)	(217.2334)
Change in net asset value from operations	(1.8196)	(76.3252)	(219.4190)
Net asset value, ending balance	23.34	25.15	101.4800
Market value per share, beginning balance	25.08	103.70	322.20
Market value per share, ending balance	$ 23.36	$ 25.08	$ 103.70
Total Return, at net asset value	(7.20%)	(75.20%)	(68.40%)
Total Return, at market value	(6.90%)	(75.80%)	(67.80%)
Ratios to Average Net Assets
Expense ratio	1.01%	1.02%	0.99%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.76%)	(0.98%)	(0.95%)
ProShares Ultra Bloomberg Natural Gas [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 18.57	$ 61.6491	$ 155.3534
Net investment income (loss)	(0.1579)	(0.4982)	(1.5167)
Net realized and unrealized gain (loss)	0.4364	(42.5811)	(92.1876)
Change in net asset value from operations	0.2785	(43.0793)	(93.7043)
Net asset value, ending balance	18.85	18.57	61.6491
Market value per share, beginning balance	18.48	63.12	157.12
Market value per share, ending balance	$ 18.96	$ 18.48	$ 63.12
Total Return, at net asset value	1.50%	(69.90%)	(60.30%)
Total Return, at market value	2.60%	(70.70%)	(59.80%)
Ratios to Average Net Assets
Expense ratio	1.34%	1.29%	1.13%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(1.12%)	(1.26%)	(1.10%)
ProShares Ultra Gold [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 29.73	$ 40.0011	$ 41.2553
Net investment income (loss)	(0.2751)	(0.3292)	(0.4078)
Net realized and unrealized gain (loss)	3.4482	(9.9424)	(0.8464)
Change in net asset value from operations	3.1731	(10.2716)	(1.2542)
Net asset value, ending balance	32.90	29.73	40.0011
Market value per share, beginning balance	29.73	38.41	41.26
Market value per share, ending balance	$ 33.20	$ 29.73	$ 38.41
Total Return, at net asset value	10.70%	(25.70%)	(3.00%)
Total Return, at market value	11.70%	(22.60%)	(6.90%)
Ratios to Average Net Assets
Expense ratio	0.95%	0.95%	0.95%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.69%)	(0.90%)	(0.91%)
ProShares Ultra Silver [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 27.06	$ 39.3657	$ 63.3305
Net investment income (loss)	(0.2717)	(0.3258)	(0.5348)
Net realized and unrealized gain (loss)	6.6499	(11.9761)	(23.4300)
Change in net asset value from operations	6.3782	(12.3019)	(23.9648)
Net asset value, ending balance	33.44	27.06	39.3657
Market value per share, beginning balance	27.08	38.05	63.04
Market value per share, ending balance	$ 32.09	$ 27.08	$ 38.05
Total Return, at net asset value	23.60%	(31.30%)	(37.80%)
Total Return, at market value	18.50%	(28.80%)	(39.60%)
Ratios to Average Net Assets
Expense ratio	0.95%	0.95%	0.95%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.69%)	(0.89%)	(0.91%)
ProShares Ultra Euro [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 15.51	$ 19.8744	$ 26.0346
Net investment income (loss)	(0.1119)	(0.1505)	(0.2185)
Net realized and unrealized gain (loss)	(1.3816)	(4.2132)	(5.9417)
Change in net asset value from operations	(1.4935)	(4.3637)	(6.1602)
Net asset value, ending balance	14.02	15.51	19.8744
Market value per share, beginning balance	15.51	19.80	25.98
Market value per share, ending balance	$ 14.09	$ 15.51	$ 19.80
Total Return, at net asset value	(9.60%)	(22.00%)	(23.70%)
Total Return, at market value	(9.20%)	(21.70%)	(23.80%)
Ratios to Average Net Assets
Expense ratio	0.95%	0.95%	0.95%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.71%)	(0.93%)	(0.91%)
ProShares Ultra Yen [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 54.75	$ 56.4747	$ 74.5261
Net investment income (loss)	(0.4586)	(0.4787)	(0.6693)
Net realized and unrealized gain (loss)	1.1321	(1.2433)	(17.3821)
Change in net asset value from operations	0.6735	(1.7220)	(18.0514)
Net asset value, ending balance	55.43	54.75	56.4747
Market value per share, beginning balance	54.70	56.48	74.44
Market value per share, ending balance	$ 55.52	$ 54.70	$ 56.48
Total Return, at net asset value	1.20%	(3.00%)	(24.20%)
Total Return, at market value	1.50%	(3.20%)	(24.10%)
Ratios to Average Net Assets
Expense ratio	0.95%	0.95%	0.95%
Expense ratio, excluding brokerage commissions	0.95%	0.95%	0.95%
Net investment income (loss)	(0.69%)	(0.88%)	(0.90%)

Risk - Additional Information (

Risk - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016
Unusual Risk or Uncertainty [Line Items]
Percentage of calculation on simple inverse correlation	200.00%
Forward Agreements [Member]
Unusual Risk or Uncertainty [Line Items]
Exposure to swap agreements or forward contracts	100.00%
Ultrashort Fund [Member]
Unusual Risk or Uncertainty [Line Items]
Leverage risk benchmark	50% at any point in the day

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Subsequent Event [Member]	Jan. 12, 2017
ProShares UltraShort Bloomberg Crude Oil [Member]
Subsequent Event [Line Items]
Stockholders' equity, stock split conversion ratio	2
Stockholders' equity, stock split	2-for-1
ProShares Ultra Bloomberg Crude Oil [Member]
Subsequent Event [Line Items]
Stockholders' equity, reverse stock split conversion ratio	2
Stockholders' Equity, Reverse Stock Split	1-for-2
ProShares Ultra VIX Short-Term Futures ETF [Member]
Subsequent Event [Line Items]
Stockholders' equity, reverse stock split conversion ratio	5
Stockholders' Equity, Reverse Stock Split	1-for-5