ProShares Ultra Gold (UGL) 10-K 29 Feb 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2015	Feb. 18, 2016	Jun. 30, 2015
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
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 Managed Futures Strategy [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		350,010
Entity Public Float			9,405,209
ProShares VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		5,099,811
Entity Public Float			168,418,477
ProShares VIX Mid-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		412,403
Entity Public Float			26,470,911
ProShares Short VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		14,350,000
Entity Public Float			189,747,162
ProShares Ultra VIX Short-Term Futures ETF [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,052,448
Entity Public Float			426,519,614
ProShares UltraShort Bloomberg Commodity [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		59,995
Entity Public Float			5,337,333
ProShares UltraShort Bloomberg Crude Oil [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		969,942
Entity Public Float			181,067,201
ProShares UltraShort Bloomberg Natural Gas [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		74,944
Entity Public Float			13,156,390
ProShares UltraShort Gold [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		596,977
Entity Public Float			73,816,366
ProShares UltraShort Silver [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		616,976
Entity Public Float			60,618,396
ProShares Short Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		400,000
Entity Public Float			19,372,715
ProShares UltraShort Australian Dollar [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		350,000
Entity Public Float			19,281,775
ProShares UltraShort Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		17,500,000
Entity Public Float			629,887,847
ProShares UltraShort Yen [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,499,290
Entity Public Float			405,570,914
ProShares Ultra Bloomberg Commodity [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		199,961
Entity Public Float			2,349,354
ProShares Ultra Bloomberg Crude Oil [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		103,827,866
Entity Public Float			988,879,588
ProShares Ultra Bloomberg Natural Gas [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		1,942,169
Entity Public Float			62,926,084
ProShares Ultra Gold [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,250,000
Entity Public Float			88,896,519
ProShares Ultra Silver [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		7,946,526
Entity Public Float			287,418,504
ProShares Ultra Euro [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		700,000
Entity Public Float			13,272,232
ProShares Ultra Yen [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		99,970
Entity Public Float			$ 5,359,606

Statements of Financial Conditi

Statements of Financial Condition - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash	$ 48,049,225	$ 35,899,231
Segregated cash balances with brokers for futures contracts	261,083,712	296,561,615
Short-term U.S. government and agency obligations	3,313,591,600	3,005,876,580
Unrealized appreciation on swap agreements	6,669,519	27,585,336
Unrealized appreciation on forward agreements	6,587,221	2,850,677
Unrealized appreciation on foreign currency forward contracts	1,805,661	19,594,239
Receivable from capital shares sold	48,046,138	58,085,447
Receivable on open futures contracts	27,655,327	56,002,326
Offering costs		49,384
Limitation by Sponsor		9,474
Total assets	3,713,488,403	3,502,514,309
Liabilities
Payable for capital shares redeemed	60,119,975	25,400,996
Payable on open futures contracts	3,078,269	46,405,998
Brokerage commissions and fees payable	39,148
Management fee payable	2,839,305	2,657,505
Payable for offering costs		65,785
Unrealized depreciation on swap agreements	72,446,044	76,512,435
Unrealized depreciation on forward agreements	24,811,696	14,882,468
Unrealized depreciation on foreign currency forward contracts	43,545,218	4,528,636
Total liabilities	$ 206,879,655	$ 170,453,823
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 3,506,608,748	$ 3,332,060,486
Total liabilities and shareholders' equity	$ 3,713,488,403	$ 3,502,514,309
Shares outstanding	143,049,418	72,190,846
ProShares Managed Futures Strategy [Member]
Assets
Cash	$ 6,931,145	$ 6,135,185
Segregated cash balances with brokers for futures contracts	280,322	195,142
Receivable on open futures contracts		17,445
Offering costs		49,384
Limitation by Sponsor		9,474
Total assets	7,211,467	6,406,630
Liabilities
Payable on open futures contracts	19,990
Brokerage commissions and fees payable	164
Management fee payable	4,291
Payable for offering costs		65,785
Total liabilities	$ 24,445	$ 65,785
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 7,187,022	$ 6,340,845
Total liabilities and shareholders' equity	$ 7,211,467	$ 6,406,630
Shares outstanding	350,010	300,010
Net asset value per share	$ 20.53	$ 21.14
Market value per share	$ 20.76	$ 21.28
ProShares VIX Short-Term Futures ETF [Member]
Assets
Cash	$ 2,124,103	$ 1,694,791
Segregated cash balances with brokers for futures contracts	5,888,545	18,439,750
Short-term U.S. government and agency obligations	96,073,659	82,088,299
Receivable on open futures contracts	1,263,933	9,317,236
Total assets	105,350,240	111,540,076
Liabilities
Management fee payable	77,417	80,751
Total liabilities	$ 77,417	$ 80,751
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 105,272,823	$ 111,459,325
Total liabilities and shareholders' equity	$ 105,350,240	$ 111,540,076
Shares outstanding	7,949,812	5,324,812
Net asset value per share	$ 13.24	$ 20.93
Market value per share	$ 13.33	$ 20.99
ProShares VIX Mid-Term Futures ETF [Member]
Assets
Cash	$ 671,791	$ 1,634,082
Segregated cash balances with brokers for futures contracts	980,750	1,906,950
Short-term U.S. government and agency obligations	25,976,287	24,105,906
Receivable on open futures contracts	42,188	1,783,328
Total assets	27,671,016	29,430,266
Liabilities
Payable for capital shares redeemed		7,947,955
Management fee payable	20,378	22,736
Total liabilities	$ 20,378	$ 7,970,691
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 27,650,638	$ 21,459,575
Total liabilities and shareholders' equity	$ 27,671,016	$ 29,430,266
Shares outstanding	512,404	337,404
Net asset value per share	$ 53.96	$ 63.60
Market value per share	$ 53.99	$ 63.89
ProShares Short VIX Short-Term Futures ETF [Member]
Assets
Cash	$ 5,150,976	$ 9,122,219
Segregated cash balances with brokers for futures contracts	123,528,405	85,244,950
Short-term U.S. government and agency obligations	535,392,718	446,975,220
Receivable from capital shares sold	10,164,157
Total assets	674,236,256	541,342,389
Liabilities
Payable for capital shares redeemed	29,497,107	3,358,781
Payable on open futures contracts	1,420,271	31,020,019
Management fee payable	507,517	407,465
Total liabilities	$ 31,424,895	$ 34,786,265
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 642,811,361	$ 506,556,124
Total liabilities and shareholders' equity	$ 674,236,256	$ 541,342,389
Shares outstanding	12,650,040	8,250,040
Net asset value per share	$ 50.81	$ 61.40
Market value per share	$ 50.45	$ 61.16
ProShares Ultra VIX Short-Term Futures ETF [Member]
Assets
Cash	$ 9,081,964	$ 3,737,292
Segregated cash balances with brokers for futures contracts	62,348,600	116,907,700
Short-term U.S. government and agency obligations	438,357,849	182,639,188
Receivable from capital shares sold	32,987,472	12,549,248
Receivable on open futures contracts	17,995,478	42,531,441
Total assets	560,771,363	358,364,869
Liabilities
Payable for capital shares redeemed	12,635,235	6,272,056
Management fee payable	427,388	302,860
Total liabilities	$ 13,062,623	$ 6,574,916
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 547,708,740	$ 351,789,953
Total liabilities and shareholders' equity	$ 560,771,363	$ 358,364,869
Shares outstanding	19,502,448	2,804,020
Net asset value per share	$ 28.08	$ 125.46
Market value per share	$ 28.35	$ 125.75
ProShares UltraShort Bloomberg Commodity [Member]
Assets
Cash	$ 831,440	$ 467,766
Short-term U.S. government and agency obligations	7,518,119	4,233,548
Unrealized appreciation on swap agreements	224,491	567,259
Total assets	8,574,050	5,268,573
Liabilities
Management fee payable	6,844	3,867
Unrealized depreciation on swap agreements	53,167
Total liabilities	$ 60,011	$ 3,867
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 8,514,039	$ 5,264,706
Total liabilities and shareholders' equity	$ 8,574,050	$ 5,268,573
Shares outstanding	59,997	59,997
Net asset value per share	$ 141.91	$ 87.75
Market value per share	$ 140.41	$ 87.44
ProShares UltraShort Bloomberg Crude Oil [Member]
Assets
Cash	$ 598,645	$ 994,268
Segregated cash balances with brokers for futures contracts	10,154,430	12,292,665
Short-term U.S. government and agency obligations	79,692,642	131,594,608
Unrealized appreciation on swap agreements	6,412,656	27,018,077
Receivable on open futures contracts		1,293,531
Total assets	96,858,373	173,193,149
Liabilities
Payable for capital shares redeemed		3,854,654
Payable on open futures contracts	850,883
Brokerage commissions and fees payable	8,453
Management fee payable	101,143	128,385
Total liabilities	$ 960,479	$ 3,983,039
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 95,897,894	$ 169,210,110
Total liabilities and shareholders' equity	$ 96,858,373	$ 173,193,149
Shares outstanding	719,944	2,169,944
Net asset value per share	$ 133.20	$ 77.98
Market value per share	$ 133.64	$ 76.52
ProShares UltraShort Bloomberg Natural Gas [Member]
Assets
Cash	$ 1,099,140	$ 696,743
Segregated cash balances with brokers for futures contracts	2,046,660	4,405,830
Short-term U.S. government and agency obligations	8,115,004	8,672,710
Receivable on open futures contracts		923,531
Total assets	11,260,804	14,698,814
Liabilities
Payable on open futures contracts	785,170
Brokerage commissions and fees payable	1,908
Management fee payable	10,870	10,250
Total liabilities	$ 797,948	$ 10,250
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 10,462,856	$ 14,688,564
Total liabilities and shareholders' equity	$ 11,260,804	$ 14,698,814
Shares outstanding	74,952	174,952
Net asset value per share	$ 139.59	$ 83.96
Market value per share	$ 139.66	$ 82.03
ProShares UltraShort Gold [Member]
Assets
Cash	$ 151,638	$ 162,434
Segregated cash balances with brokers for futures contracts	91,250	8,800
Short-term U.S. government and agency obligations	72,979,905	84,040,107
Unrealized appreciation on forward agreements	1,808,942
Receivable on open futures contracts		3,260
Total assets	75,031,735	84,214,601
Liabilities
Payable on open futures contracts	80
Management fee payable	59,891	70,061
Unrealized depreciation on forward agreements		2,282,778
Total liabilities	$ 59,971	$ 2,352,839
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 74,971,764	$ 81,861,762
Total liabilities and shareholders' equity	$ 75,031,735	$ 84,214,601
Shares outstanding	646,978	846,978
Net asset value per share	$ 115.88	$ 96.65
Market value per share	$ 115.83	$ 100.22
ProShares UltraShort Silver [Member]
Assets
Cash	$ 514,784	$ 207,506
Segregated cash balances with brokers for futures contracts	11,440	14,300
Short-term U.S. government and agency obligations	50,730,230	52,226,692
Unrealized appreciation on forward agreements	4,778,279	799,523
Receivable on open futures contracts	390	6,770
Total assets	56,035,123	53,254,791
Liabilities
Management fee payable	47,185	42,354
Unrealized depreciation on forward agreements		204,570
Total liabilities	$ 47,185	$ 246,924
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 55,987,938	$ 53,007,867
Total liabilities and shareholders' equity	$ 56,035,123	$ 53,254,791
Shares outstanding	866,978	916,978
Net asset value per share	$ 64.58	$ 57.81
Market value per share	$ 64.55	$ 59.70
ProShares Short Euro [Member]
Assets
Cash	$ 1,783,802	$ 1,640,225
Segregated cash balances with brokers for futures contracts	503,745	242,880
Short-term U.S. government and agency obligations	15,153,211	12,086,577
Receivable on open futures contracts	84,235	63,250
Total assets	17,524,993	14,032,932
Liabilities
Management fee payable	14,095	11,128
Total liabilities	$ 14,095	$ 11,128
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 17,510,898	$ 14,021,804
Total liabilities and shareholders' equity	$ 17,524,993	$ 14,032,932
Shares outstanding	400,005	350,005
Net asset value per share	$ 43.78	$ 40.06
Market value per share	$ 43.74	$ 40.03
ProShares UltraShort Australian Dollar [Member]
Assets
Cash	$ 1,958,996	$ 1,788,757
Segregated cash balances with brokers for futures contracts	57,065	1,020,217
Short-term U.S. government and agency obligations	18,408,894	20,267,679
Receivable on open futures contracts	52,491	62,534
Total assets	20,477,446	23,139,187
Liabilities
Management fee payable	16,767	18,397
Total liabilities	$ 16,767	$ 18,397
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 20,460,679	$ 23,120,790
Total liabilities and shareholders' equity	$ 20,477,446	$ 23,139,187
Shares outstanding	350,005	450,005
Net asset value per share	$ 58.46	$ 51.38
Market value per share	$ 58.15	$ 51.37
ProShares UltraShort Euro [Member]
Assets
Cash	$ 10,372,583	$ 746,454
Short-term U.S. government and agency obligations	546,166,776	487,111,117
Unrealized appreciation on foreign currency forward contracts		19,019,765
Receivable from capital shares sold		12,956,604
Total assets	556,539,359	519,833,940
Liabilities
Payable for capital shares redeemed	5,108,230
Management fee payable	414,275	385,820
Unrealized depreciation on foreign currency forward contracts	28,710,336	2,256,771
Total liabilities	$ 34,232,841	$ 2,642,591
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 522,306,518	$ 517,191,349
Total liabilities and shareholders' equity	$ 556,539,359	$ 519,833,940
Shares outstanding	20,450,014	23,950,014
Net asset value per share	$ 25.54	$ 21.59
Market value per share	$ 25.53	$ 21.61
ProShares UltraShort Yen [Member]
Assets
Cash	$ 276,968	$ 532,706
Short-term U.S. government and agency obligations	259,997,001	532,957,746
Unrealized appreciation on foreign currency forward contracts	933,727	571,149
Total assets	261,207,696	534,061,601
Liabilities
Payable for capital shares redeemed	8,794,729
Management fee payable	210,888	439,804
Unrealized depreciation on foreign currency forward contracts	14,829,179	2,149,924
Total liabilities	$ 23,834,796	$ 2,589,728
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 237,372,900	$ 531,471,873
Total liabilities and shareholders' equity	$ 261,207,696	$ 534,061,601
Shares outstanding	2,699,294	5,949,294
Net asset value per share	$ 87.94	$ 89.33
Market value per share	$ 87.89	$ 89.30
ProShares Ultra Bloomberg Commodity [Member]
Assets
Cash	$ 211,629	$ 185,684
Short-term U.S. government and agency obligations	7,084,065	2,754,900
Unrealized appreciation on swap agreements	32,372
Total assets	7,328,066	2,940,584
Liabilities
Management fee payable	5,794	2,326
Unrealized depreciation on swap agreements	216,288	331,338
Total liabilities	$ 222,082	$ 333,664
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 7,105,984	$ 2,606,920
Total liabilities and shareholders' equity	$ 7,328,066	$ 2,940,584
Shares outstanding	249,965	50,004
Net asset value per share	$ 28.43	$ 52.13
Market value per share	$ 28.07	$ 51.44
ProShares Ultra Bloomberg Crude Oil [Member]
Assets
Cash	$ 4,008,379	$ 2,349,384
Segregated cash balances with brokers for futures contracts	47,571,810	34,605,120
Short-term U.S. government and agency obligations	797,650,543	467,200,736
Receivable from capital shares sold	4,894,509	28,726,173
Receivable on open futures contracts	5,150,763
Total assets	859,276,004	532,881,413
Liabilities
Payable for capital shares redeemed	2,514,956
Payable on open futures contracts		5,817,266
Brokerage commissions and fees payable	25,000
Management fee payable	636,984	320,062
Unrealized depreciation on swap agreements	72,176,589	76,181,097
Total liabilities	$ 75,353,529	$ 82,318,425
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 783,922,475	$ 450,562,988
Total liabilities and shareholders' equity	$ 859,276,004	$ 532,881,413
Shares outstanding	62,327,867	8,879,834
Net asset value per share	$ 12.58	$ 50.74
Market value per share	$ 12.54	$ 51.85
ProShares Ultra Bloomberg Natural Gas [Member]
Assets
Cash	$ 1,411,137	$ 1,653,582
Segregated cash balances with brokers for futures contracts	7,595,280	21,134,080
Short-term U.S. government and agency obligations	26,807,731	53,410,227
Receivable from capital shares sold		3,853,422
Receivable on open futures contracts	3,065,769
Total assets	38,879,917	80,051,311
Liabilities
Payable on open futures contracts		9,552,314
Brokerage commissions and fees payable	3,623
Management fee payable	25,110	65,790
Total liabilities	$ 28,733	$ 9,618,104
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 38,851,184	$ 70,433,207
Total liabilities and shareholders' equity	$ 38,879,917	$ 80,051,311
Shares outstanding	2,092,170	1,142,485
Net asset value per share	$ 18.57	$ 61.65
Market value per share	$ 18.48	$ 63.12
ProShares Ultra Gold [Member]
Assets
Cash	$ 251,524	$ 104,145
Segregated cash balances with brokers for futures contracts	8,250	8,800
Short-term U.S. government and agency obligations	71,912,587	101,927,857
Unrealized appreciation on forward agreements		2,051,154
Receivable on open futures contracts	80
Total assets	72,172,441	104,091,956
Liabilities
Payable for capital shares redeemed		1,999,718
Payable on open futures contracts		3,260
Management fee payable	57,031	85,633
Unrealized depreciation on forward agreements	2,250,595
Total liabilities	$ 2,307,626	$ 2,088,611
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 69,864,815	$ 102,003,345
Total liabilities and shareholders' equity	$ 72,172,441	$ 104,091,956
Shares outstanding	2,350,014	2,550,014
Net asset value per share	$ 29.73	$ 40
Market value per share	$ 29.73	$ 38.41
ProShares Ultra Silver [Member]
Assets
Cash	$ 243,900	$ 305,004
Segregated cash balances with brokers for futures contracts	17,160	14,300
Short-term U.S. government and agency obligations	238,899,626	305,474,211
Total assets	239,160,686	305,793,515
Liabilities
Payable for capital shares redeemed		1,967,832
Payable on open futures contracts	1,875	6,770
Management fee payable	181,068	254,050
Unrealized depreciation on forward agreements	22,561,101	12,395,120
Total liabilities	$ 22,744,044	$ 14,623,772
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 216,416,642	$ 291,169,743
Total liabilities and shareholders' equity	$ 239,160,686	$ 305,793,515
Shares outstanding	7,996,533	7,396,533
Net asset value per share	$ 27.06	$ 39.37
Market value per share	$ 27.08	$ 38.05
ProShares Ultra Euro [Member]
Assets
Cash	$ 227,310	$ 671,117
Short-term U.S. government and agency obligations	11,605,262	2,415,698
Unrealized appreciation on foreign currency forward contracts	604,920	2,921
Total assets	12,437,492	3,089,736
Liabilities
Payable for capital shares redeemed	1,569,718
Management fee payable	10,044	2,003
Unrealized depreciation on foreign currency forward contracts		106,292
Total liabilities	$ 1,579,762	$ 108,295
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 10,857,730	$ 2,981,441
Total liabilities and shareholders' equity	$ 12,437,492	$ 3,089,736
Shares outstanding	700,014	150,014
Net asset value per share	$ 15.51	$ 19.87
Market value per share	$ 15.51	$ 19.80
ProShares Ultra Yen [Member]
Assets
Cash	$ 147,371	$ 846,919
Short-term U.S. government and agency obligations	5,069,491	1,287,869
Unrealized appreciation on foreign currency forward contracts	267,014	404
Total assets	5,483,876	2,135,192
Liabilities
Management fee payable	4,325	1,515
Unrealized depreciation on foreign currency forward contracts	5,703	15,649
Total liabilities	$ 10,028	$ 17,164
Commitments and Contingencies
Shareholders' equity
Shareholders' equity	$ 5,473,848	$ 2,118,028
Total liabilities and shareholders' equity	$ 5,483,876	$ 2,135,192
Shares outstanding	99,974	37,504
Net asset value per share	$ 54.75	$ 56.47
Market value per share	$ 54.70	$ 56.48

Statements of Operations

Statements of Operations - USD ($)		3 Months Ended		12 Months Ended
		Dec. 31, 2014		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Investment Income
Interest				$ 1,546,729		$ 1,151,784		$ 1,552,350
Expenses
Management fee				35,055,606		27,669,705		30,836,871
Brokerage commissions and fees				6,480,284		4,580,430		3,202,862
Offering costs				59,479		16,401		141,251
Limitation by Sponsor				(11,814)		(9,474)		(57,127)
Total expenses				41,583,555		32,257,062		34,123,857
Net investment income (loss)				(40,036,826)		(31,105,278)		(32,571,507)
Net realized gain (loss) on
Foreign currency forward contracts				138,005,915		210,564,249		114,287,543
Short-term U.S. government and agency obligations				47,732		123,212		79,408
Net realized gain (loss)				(1,164,531,561)		(160,550,428)		(921,507,900)
Change in net unrealized appreciation/depreciation on
Futures contracts				40,193,356		9,175,329		(53,329,004)
Foreign currency forward contracts				(56,805,160)		(514,227)		(8,979,636)
Short-term U.S. government and agency obligations				(46,135)		(73,469)		(3,687)
Change in net unrealized appreciation/depreciation				(39,700,049)		(46,083,005)		41,884,499
Net realized and unrealized gain (loss)				(1,204,231,610)		(206,633,433)		(879,623,401)
Net income (loss)				(1,244,268,436)		(237,738,711)		(912,194,908)
Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				(675,706,798)		(136,360,050)		(398,397,208)
Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				(553,434,721)		(79,470,613)		55,106,405
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				(16,849,426)		(48,539,505)		(28,257,739)
Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				(73,443,689)		(155,407,226)		(692,584,048)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				(6,192,684)		(6,131,133)		132,454,565
ProShares Managed Futures Strategy [Member]
Expenses
Management fee	[1]			16,121
Brokerage commissions and fees	[1]	$ 604		7,768
Offering costs	[1]	16,401		59,479
Limitation by Sponsor	[1]	(9,474)		(11,814)
Total expenses	[1]	7,531		71,554
Net investment income (loss)	[1]	(7,531)		(71,554)
Net realized gain (loss) on
Net realized gain (loss)	[1]	109,006		(278,197)
Change in net unrealized appreciation/depreciation on
Futures contracts	[1]	104,327		(47,148)
Net realized and unrealized gain (loss)	[1]	213,333		(325,345)
Net income (loss)		$ 205,802	[1]	$ (396,899)	[1],[2]	205,802	[2]
Net income (loss) per weighted-average share	[1]	$ 1.14		$ (0.97)
Weighted-average shares outstanding	[1]	180,779		408,914
ProShares Managed Futures Strategy [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives	[1]	$ 109,006		$ (278,197)
ProShares VIX Short-Term Futures ETF [Member]
Investment Income
Interest				42,319		47,562		77,010
Expenses
Management fee				1,062,171		1,083,189		1,661,129
Brokerage commissions and fees				130,942		82,921
Total expenses				1,193,113		1,166,110		1,661,129
Net investment income (loss)				(1,150,794)		(1,118,548)		(1,584,119)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				1,703		12,242		(6,516)
Net realized gain (loss)				(19,406,840)		(682,105)		(144,624,652)
Change in net unrealized appreciation/depreciation on
Futures contracts				(7,343,245)		22,917,306		(16,431,267)
Short-term U.S. government and agency obligations				(3,657)		(6,229)		4,439
Change in net unrealized appreciation/depreciation				(7,346,902)		22,911,077		(16,426,828)
Net realized and unrealized gain (loss)				(26,753,742)		22,228,972		(161,051,480)
Net income (loss)				$ (27,904,536)		$ 21,110,424		$ (162,635,599)
Net income (loss) per weighted-average share				$ (3.21)		$ 3.86		$ (36.12)
Weighted-average shares outstanding				8,688,990		5,463,511		4,503,256
ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ (19,408,543)		$ (694,347)		$ (144,618,136)
ProShares VIX Mid-Term Futures ETF [Member]
Investment Income
Interest				8,293		16,573		25,811
Expenses
Management fee				233,390		392,120		572,377
Brokerage commissions and fees				15,503		10,931
Total expenses				248,893		403,051		572,377
Net investment income (loss)				(240,600)		(386,478)		(546,566)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				1,355		1,742		(78)
Net realized gain (loss)				(3,334,581)		(14,377,068)		(28,219,941)
Change in net unrealized appreciation/depreciation on
Futures contracts				(605,025)		5,157,354		(3,426,279)
Short-term U.S. government and agency obligations				(327)		187		(2,031)
Change in net unrealized appreciation/depreciation				(605,352)		5,157,541		(3,428,310)
Net realized and unrealized gain (loss)				(3,939,933)		(9,219,527)		(31,648,251)
Net income (loss)				$ (4,180,533)		$ (9,606,005)		$ (32,194,817)
Net income (loss) per weighted-average share				$ (8.78)		$ (14.08)		$ (46.49)
Weighted-average shares outstanding				476,171		682,131		692,570
ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ (3,335,936)		$ (14,378,810)		$ (28,219,863)
ProShares Short VIX Short-Term Futures ETF [Member]
Investment Income
Interest				180,686		81,544		36,503
Expenses
Management fee				4,043,491		2,785,597		845,479
Brokerage commissions and fees				1,935,395		1,581,416		519,393
Total expenses				5,978,886		4,367,013		1,364,872
Net investment income (loss)				(5,798,200)		(4,285,469)		(1,328,369)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				35,629		19,363		6,005
Net realized gain (loss)				69,828,657		76,945,361		87,181,110
Change in net unrealized appreciation/depreciation on
Futures contracts				27,098,564		(24,469,104)		9,504,130
Short-term U.S. government and agency obligations				8,936		(1,764)		1,795
Change in net unrealized appreciation/depreciation				27,107,500		(24,470,868)		9,505,925
Net realized and unrealized gain (loss)				96,936,157		52,474,493		96,687,035
Net income (loss)				$ 91,137,957		$ 48,189,024		$ 95,358,666
Net income (loss) per weighted-average share				$ 12.83		$ 11.52		$ 53.11
Weighted-average shares outstanding				7,103,739		4,182,232		1,795,656
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ 69,793,028		$ 76,925,998		$ 87,175,105
ProShares Ultra VIX Short-Term Futures ETF [Member]
Investment Income
Interest				156,187		72,700		70,016
Expenses
Management fee				4,362,460		2,868,337		2,555,345
Brokerage commissions and fees				3,203,875		2,563,849		2,343,432
Total expenses				7,566,335		5,432,186		4,898,777
Net investment income (loss)				(7,410,148)		(5,359,486)		(4,828,761)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				(49,718)		9,921		18,730
Net realized gain (loss)				(392,223,946)		(139,402,604)		(405,797,946)
Change in net unrealized appreciation/depreciation on
Futures contracts				(27,690,787)		63,595,164		(26,066,973)
Short-term U.S. government and agency obligations				26,647		(4,701)		7,062
Change in net unrealized appreciation/depreciation				(27,664,140)		63,590,463		(26,361,262)
Net realized and unrealized gain (loss)				(419,888,086)		(75,812,141)		(432,159,208)
Net income (loss)				$ (427,298,234)		$ (81,171,627)		$ (436,987,969)
Net income (loss) per weighted-average share				$ (41.66)		$ (44)		$ (1,357.88)
Weighted-average shares outstanding				10,257,573		1,844,625		321,817
ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ (392,174,228)		$ (139,412,525)		$ (401,363,569)
ProShares Ultra VIX Short-Term Futures ETF [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives								(4,453,107)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives								(301,351)
ProShares UltraShort Bloomberg Commodity [Member]
Investment Income
Interest				2,698		1,232		1,899
Expenses
Management fee				59,324		35,302		34,029
Total expenses				59,324		35,302		34,029
Net investment income (loss)				(56,626)		(34,070)		(32,130)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				16		3		24
Net realized gain (loss)				3,701,255		906,312		760,026
Change in net unrealized appreciation/depreciation on
Short-term U.S. government and agency obligations				639		113		(267)
Change in net unrealized appreciation/depreciation				(395,296)		595,037		(176,434)
Net realized and unrealized gain (loss)				3,305,959		1,501,349		583,592
Net income (loss)				$ 3,249,333		$ 1,467,279		$ 551,462
Net income (loss) per weighted-average share				$ 54.16		$ 24.46		$ 9.19
Weighted-average shares outstanding				59,997		59,997		59,997
ProShares UltraShort Bloomberg Commodity [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ 3,701,239		$ 906,309		$ 760,002
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				(395,935)		594,924		(176,167)
ProShares UltraShort Bloomberg Crude Oil [Member]
Investment Income
Interest				60,884		110,620		113,487
Expenses
Management fee				1,978,613		2,448,428		2,581,084
Brokerage commissions and fees				248,482		78,033		77,031
Total expenses				2,227,095		2,526,461		2,658,115
Net investment income (loss)				(2,166,211)		(2,415,841)		(2,544,628)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				14,458		20,701		5,188
Net realized gain (loss)				91,684,782		99,347,798		(12,299,811)
Change in net unrealized appreciation/depreciation on
Futures contracts				(13,342,090)		17,039,376		2,796,948
Short-term U.S. government and agency obligations				(4,396)		(8,704)		6,876
Change in net unrealized appreciation/depreciation				(33,951,907)		46,381,649		6,077,984
Net realized and unrealized gain (loss)				57,732,875		145,729,447		(6,221,827)
Net income (loss)				$ 55,566,664		$ 143,313,606		$ (8,766,455)
Net income (loss) per weighted-average share				$ 20.13		$ 16.45		$ (1.05)
Weighted-average shares outstanding				2,760,218		8,711,177		8,388,848
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ 46,904,474		$ 44,472,509		$ (4,299,671)
ProShares UltraShort Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				44,765,850		54,854,588		(8,005,328)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				(20,605,421)		29,350,977		3,274,160
ProShares UltraShort Bloomberg Natural Gas [Member]
Investment Income
Interest				5,830		16,306		8,620
Expenses
Management fee				112,277		385,014		172,542
Brokerage commissions and fees				70,677		92,199		45,438
Total expenses				182,954		477,213		217,980
Net investment income (loss)				(177,124)		(460,907)		(209,360)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				29		5,163		619
Net realized gain (loss)				15,212,833		8,796,882		(2,584,895)
Change in net unrealized appreciation/depreciation on
Futures contracts				(6,412,629)		2,899,165		633,165
Short-term U.S. government and agency obligations				168		72		(422)
Change in net unrealized appreciation/depreciation				(6,412,461)		2,899,237		632,743
Net realized and unrealized gain (loss)				8,800,372		11,696,119		(1,952,152)
Net income (loss)				$ 8,623,248		$ 11,235,212		$ (2,161,512)
Net income (loss) per weighted-average share				$ 64.82		$ 12.09		$ (9.52)
Weighted-average shares outstanding				133,033		929,061		227,135
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ 15,212,804		$ 8,791,719		$ (2,585,514)
ProShares UltraShort Gold [Member]
Investment Income
Interest				31,999		40,675		61,891
Expenses
Management fee				735,540		898,453		1,237,712
Brokerage commissions and fees				41		39		39
Total expenses				735,581		898,492		1,237,751
Net investment income (loss)				(703,582)		(857,817)		(1,175,860)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				1,301		3,873		(1,351)
Net realized gain (loss)				12,708,936		(5,312,609)		61,123,058
Change in net unrealized appreciation/depreciation on
Futures contracts				9,740		(19,040)		(720)
Short-term U.S. government and agency obligations				(2,950)		868		(1,136)
Change in net unrealized appreciation/depreciation				4,098,510		(7,934,003)		1,901,341
Net realized and unrealized gain (loss)				16,807,446		(13,246,612)		63,024,399
Net income (loss)				$ 16,103,864		$ (14,104,429)		$ 61,848,539
Net income (loss) per weighted-average share				$ 20.94		$ (13.54)		$ 39.77
Weighted-average shares outstanding				769,032		1,041,909		1,555,197
ProShares UltraShort Gold [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ 15,950		$ 23,310		$ 97,060
ProShares UltraShort Gold [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				12,691,685		(5,339,792)		61,027,349
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				4,091,720		(7,915,831)		1,903,197
ProShares UltraShort Silver [Member]
Investment Income
Interest				23,831		30,901		60,178
Expenses
Management fee				540,253		616,703		1,033,442
Brokerage commissions and fees				42		39		40
Total expenses				540,295		616,742		1,033,482
Net investment income (loss)				(516,464)		(585,841)		(973,304)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				(2,787)		4,234		6,916
Net realized gain (loss)				10,756,758		15,119,117		113,463,320
Change in net unrealized appreciation/depreciation on
Futures contracts				4,410		(12,640)		(25,820)
Short-term U.S. government and agency obligations				(794)		(2,414)		(3,439)
Change in net unrealized appreciation/depreciation				4,186,942		2,807,756		(21,564,801)
Net realized and unrealized gain (loss)				14,943,700		17,926,873		91,898,519
Net income (loss)				$ 14,427,236		$ 17,341,032		$ 90,925,215
Net income (loss) per weighted-average share				$ 13.88		$ 11.65		$ 29.07
Weighted-average shares outstanding				1,039,579		1,487,936		3,127,936
ProShares UltraShort Silver [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ 15,575		$ 32,275		$ 137,040
ProShares UltraShort Silver [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				10,743,970		15,082,608		113,319,364
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				4,183,326		2,822,810		(21,535,542)
ProShares Short Euro [Member]
Investment Income
Interest				4,504		4,716		1,996
Expenses
Management fee				179,286		121,126		35,075
Brokerage commissions and fees				3,979		1,837		812
Offering costs								45,511
Limitation by Sponsor								(28,232)
Total expenses				183,265		122,963		53,166
Net investment income (loss)				(178,761)		(118,247)		(51,170)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				218		402		157
Net realized gain (loss)				1,559,643		1,593,450		(381,830)
Change in net unrealized appreciation/depreciation on
Futures contracts				(141,893)		418,562		21,825
Short-term U.S. government and agency obligations				(170)		(472)		463
Change in net unrealized appreciation/depreciation				(142,063)		418,090		22,288
Net realized and unrealized gain (loss)				1,417,580		2,011,540		(359,542)
Net income (loss)				$ 1,238,819		$ 1,893,293		$ (410,712)
Net income (loss) per weighted-average share				$ 2.84		$ 5.49		$ (2.75)
Weighted-average shares outstanding				436,443		344,937		149,183
ProShares Short Euro [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ 1,559,425		$ 1,593,048		$ (381,987)
ProShares UltraShort Australian Dollar [Member]
Investment Income
Interest				5,998		8,225		5,653
Expenses
Management fee				199,845		208,597		106,713
Brokerage commissions and fees				16,140		12,811		11,753
Offering costs								47,870
Limitation by Sponsor								(1,259)
Total expenses				215,985		221,408		165,077
Net investment income (loss)				(209,987)		(213,183)		(159,424)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				225		492		(74)
Net realized gain (loss)				4,330,688		2,296,708		2,720,005
Change in net unrealized appreciation/depreciation on
Futures contracts				(1,163,751)		(174,124)		832,015
Short-term U.S. government and agency obligations				(553)		(1,463)		1,279
Change in net unrealized appreciation/depreciation				(1,164,304)		(175,587)		833,294
Net realized and unrealized gain (loss)				3,166,384		2,121,121		3,553,299
Net income (loss)				$ 2,956,397		$ 1,907,938		$ 3,393,875
Net income (loss) per weighted-average share				$ 8.08		$ 3.82		$ 9.21
Weighted-average shares outstanding				365,758		499,046		368,635
ProShares UltraShort Australian Dollar [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ 4,330,463		$ 2,296,216		$ 2,720,079
ProShares UltraShort Euro [Member]
Investment Income
Interest				264,845		199,596		224,967
Expenses
Management fee				5,265,432		4,193,741		4,600,479
Total expenses				5,265,432		4,193,741		4,600,479
Net investment income (loss)				(5,000,587)		(3,994,145)		(4,375,512)
Net realized gain (loss) on
Foreign currency forward contracts				131,651,572		83,678,955		(48,063,036)
Short-term U.S. government and agency obligations				22,509		4,637		7,153
Net realized gain (loss)				131,674,081		83,683,592		(48,055,883)
Change in net unrealized appreciation/depreciation on
Foreign currency forward contracts				(45,473,330)		30,511,501		(600,935)
Short-term U.S. government and agency obligations				(23,782)		(12,286)		12,268
Change in net unrealized appreciation/depreciation				(45,497,112)		30,499,215		(588,667)
Net realized and unrealized gain (loss)				86,176,969		114,182,807		(48,644,550)
Net income (loss)				$ 81,176,382		$ 110,188,662		$ (53,020,062)
Net income (loss) per weighted-average share				$ 3.66		$ 4.53		$ (2.03)
Weighted-average shares outstanding				22,169,740		24,321,384		26,095,630
ProShares UltraShort Yen [Member]
Investment Income
Interest				$ 135,814		$ 197,253		$ 209,601
Expenses
Management fee				3,759,492		3,938,854		4,607,832
Total expenses				3,759,492		3,938,854		4,607,832
Net investment income (loss)				(3,623,678)		(3,741,601)		(4,398,231)
Net realized gain (loss) on
Foreign currency forward contracts				8,809,464		127,846,225		164,019,598
Short-term U.S. government and agency obligations				(3,035)		13,833		4,527
Net realized gain (loss)				8,806,429		127,860,058		164,024,125
Change in net unrealized appreciation/depreciation on
Foreign currency forward contracts				(12,316,677)		(30,965,459)		(8,727,491)
Short-term U.S. government and agency obligations				(30,886)		(20,893)		22,835
Change in net unrealized appreciation/depreciation				(12,347,563)		(30,986,352)		(8,704,656)
Net realized and unrealized gain (loss)				(3,541,134)		96,873,706		155,319,469
Net income (loss)				$ (7,164,812)		$ 93,132,105		$ 150,921,238
Net income (loss) per weighted-average share				$ (1.63)		$ 15.96		$ 19.43
Weighted-average shares outstanding				4,396,143		5,835,184		7,767,376
ProShares Ultra Bloomberg Commodity [Member]
Investment Income
Interest				$ 733		$ 1,330		$ 2,066
Expenses
Management fee				34,275		32,321		40,543
Total expenses				34,275		32,321		40,543
Net investment income (loss)				(33,542)		(30,991)		(38,477)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				(351)		43		(44)
Net realized gain (loss)				(2,952,171)		(1,065,579)		(1,254,295)
Change in net unrealized appreciation/depreciation on
Short-term U.S. government and agency obligations				(706)		(44)		(72)
Change in net unrealized appreciation/depreciation				146,716		(346,460)		321,274
Net realized and unrealized gain (loss)				(2,805,455)		(1,412,039)		(933,021)
Net income (loss)				$ (2,838,997)		$ (1,443,030)		$ (971,498)
Net income (loss) per weighted-average share				$ (29.55)		$ (32.81)		$ (19.64)
Weighted-average shares outstanding				96,077		43,976		49,456
ProShares Ultra Bloomberg Commodity [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ (2,951,820)		$ (1,065,622)		$ (1,254,251)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				147,422		(346,416)		321,346
ProShares Ultra Bloomberg Crude Oil [Member]
Investment Income
Interest				396,158		68,292		135,291
Expenses
Management fee				8,230,180		1,769,248		2,275,701
Brokerage commissions and fees				639,133		65,408		55,871
Total expenses				8,869,313		1,834,656		2,331,572
Net investment income (loss)				(8,473,155)		(1,766,364)		(2,196,281)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				22,728		11,806		11,289
Net realized gain (loss)				(896,154,368)		(243,314,151)		120,757,237
Change in net unrealized appreciation/depreciation on
Futures contracts				28,545,473		(47,101,448)		(21,333,749)
Short-term U.S. government and agency obligations				(6,857)		(7,333)		(5,591)
Change in net unrealized appreciation/depreciation				32,543,124		(125,247,771)		(52,715,067)
Net realized and unrealized gain (loss)				(863,611,244)		(368,561,922)		68,042,170
Net income (loss)				$ (872,084,399)		$ (370,328,286)		$ 65,845,889
Net income (loss) per weighted-average share				$ (28.93)		$ (229.11)		$ 42.70
Weighted-average shares outstanding				30,146,006		1,616,382		1,541,998
ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ (297,227,106)		$ (109,160,069)		$ 52,686,859
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				(598,949,990)		(134,165,888)		68,059,089
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				4,004,508		(78,138,990)		(31,375,727)
ProShares Ultra Bloomberg Natural Gas [Member]
Investment Income
Interest				20,167		15,961		33,341
Expenses
Management fee				574,158		455,794		707,598
Brokerage commissions and fees				207,344		88,748		147,433
Total expenses				781,502		544,542		855,031
Net investment income (loss)				(761,335)		(528,581)		(821,690)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				4,341		5,068		4,691
Net realized gain (loss)				(100,772,476)		(6,459,728)		41,422,856
Change in net unrealized appreciation/depreciation on
Futures contracts				41,202,162		(31,232,744)		160,411
Short-term U.S. government and agency obligations				(296)		(1,537)		2,133
Change in net unrealized appreciation/depreciation				41,201,866		(31,234,281)		162,544
Net realized and unrealized gain (loss)				(59,570,610)		(37,694,009)		41,585,400
Net income (loss)				$ (60,331,945)		$ (38,222,590)		$ 40,763,710
Net income (loss) per weighted-average share				$ (39.48)		$ (109.67)		$ 80.44
Weighted-average shares outstanding				1,528,192		348,513		506,766
ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ (100,776,817)		$ (6,464,796)		$ 41,418,165
ProShares Ultra Gold [Member]
Investment Income
Interest				42,700		54,755		130,437
Expenses
Management fee				839,083		1,212,064		2,055,613
Brokerage commissions and fees				41		39		39
Total expenses				839,124		1,212,103		2,055,652
Net investment income (loss)				(796,424)		(1,157,348)		(1,925,215)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				(393)		1,361		7,780
Net realized gain (loss)				(18,606,208)		(9,672,972)		(165,625,006)
Change in net unrealized appreciation/depreciation on
Futures contracts				(9,780)		19,140		680
Short-term U.S. government and agency obligations				2,086		5,375		(19,303)
Change in net unrealized appreciation/depreciation				(4,309,443)		8,888,643		8,820,461
Net realized and unrealized gain (loss)				(22,915,651)		(784,329)		(156,804,545)
Net income (loss)				$ (23,712,075)		$ (1,941,677)		$ (158,729,760)
Net income (loss) per weighted-average share				$ (9.80)		$ (0.68)		$ (44.55)
Weighted-average shares outstanding				2,418,918		2,838,096		3,562,617
ProShares Ultra Gold [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ (16,180)		$ (23,260)		$ (97,160)
ProShares Ultra Gold [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				(18,589,635)		(9,651,073)		(165,535,626)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				(4,301,749)		8,864,128		8,839,084
ProShares Ultra Silver [Member]
Investment Income
Interest				156,353		179,642		348,317
Expenses
Management fee				2,664,160		4,148,207		5,628,988
Brokerage commissions and fees				52		43		36
Total expenses				2,664,212		4,148,250		5,629,024
Net investment income (loss)				(2,507,859)		(3,968,608)		(5,280,707)
Net realized gain (loss) on
Short-term U.S. government and agency obligations				(441)		8,226		14,261
Net realized gain (loss)				(78,309,750)		(155,543,194)		(701,518,468)
Change in net unrealized appreciation/depreciation on
Futures contracts				(7,470)		12,640		25,820
Short-term U.S. government and agency obligations				(9,125)		(11,363)		(30,955)
Change in net unrealized appreciation/depreciation				(10,182,576)		(9,900,963)		143,242,691
Net realized and unrealized gain (loss)				(88,492,326)		(165,444,157)		(558,275,777)
Net income (loss)				$ (91,000,185)		$ (169,412,765)		$ (563,556,484)
Net income (loss) per weighted-average share				$ (11.82)		$ (22.83)		$ (93.80)
Weighted-average shares outstanding				7,697,629		7,420,839		6,008,363
ProShares Ultra Silver [Member] | Futures Contracts [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				$ (19,600)		$ (52,451)		$ (137,594)
ProShares Ultra Silver [Member] | Forward Agreements [Member]
Net realized gain (loss) on
Gain (loss) on sale of derivatives				(78,289,709)		(155,498,969)		(701,395,135)
Change in net unrealized appreciation/depreciation on
Unrealized gain (loss) on derivatives				(10,165,981)		(9,902,240)		143,247,826
ProShares Ultra Euro [Member]
Investment Income
Interest				2,797		1,083		1,901
Expenses
Management fee				106,868		23,330		36,925
Total expenses				106,868		23,330		36,925
Net investment income (loss)				(104,071)		(22,247)		(35,024)
Net realized gain (loss) on
Foreign currency forward contracts				(1,982,208)		(420,533)		210,150
Short-term U.S. government and agency obligations				(109)		5		55
Net realized gain (loss)				(1,982,317)		(420,528)		210,205
Change in net unrealized appreciation/depreciation on
Foreign currency forward contracts				708,291		(204,333)		13,803
Short-term U.S. government and agency obligations				(369)		(182)		76
Change in net unrealized appreciation/depreciation				707,922		(204,515)		13,879
Net realized and unrealized gain (loss)				(1,274,395)		(625,043)		224,084
Net income (loss)				$ (1,378,466)		$ (647,290)		$ 189,060
Net income (loss) per weighted-average share				$ (1.99)		$ (6.36)		$ 1.19
Weighted-average shares outstanding				691,384		101,795		159,192
ProShares Ultra Yen [Member]
Investment Income
Interest				$ 3,609		$ 1,101		$ 1,795
Expenses
Management fee				48,032		21,963		33,569
Total expenses				48,032		21,963		33,569
Net investment income (loss)				(44,423)		(20,862)		(31,774)
Net realized gain (loss) on
Foreign currency forward contracts				(472,913)		(540,398)		(1,879,169)
Short-term U.S. government and agency obligations				6		94		68
Net realized gain (loss)				(472,907)		(540,304)		(1,879,101)
Change in net unrealized appreciation/depreciation on
Foreign currency forward contracts				276,556		144,064		334,987
Short-term U.S. government and agency obligations				260		(289)		97
Change in net unrealized appreciation/depreciation				276,816		143,775		335,084
Net realized and unrealized gain (loss)				(196,091)		(396,529)		(1,544,017)
Net income (loss)				$ (240,514)		$ (417,391)		$ (1,575,791)
Net income (loss) per weighted-average share				$ (2.59)		$ (13.39)		$ (39.59)
Weighted-average shares outstanding				92,794		31,168		39,798
[1]	Since the Fund commenced investment operations on October 1, 2014, the Statement of Operations for the year ended December 31, 2013 has not been provided.
[2]	Since the Fund commenced investment operations on October 1, 2014, the Statement of Cash Flows for the year ended December 31, 2013 has not been provided.

Statements of Changes in Shareh

Statements of Changes in Shareholders' Equity - USD ($)	Total	ProShares Managed Futures Strategy [Member]		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 Commodity [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 Commodity [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, 2012	$ 3,242,449,608			$ 137,657,464	$ 37,302,992	$ 82,663,633	$ 84,716,132	$ 3,245,965	$ 89,481,266	$ 12,768,340	$ 92,416,742	$ 100,656,703	$ 3,763,040	$ 3,780,999	$ 526,778,026	$ 408,563,630	$ 6,097,211	$ 483,508,964	$ 73,019,370	$ 335,054,752	$ 747,725,400	$ 4,870,316	$ 4,227,995
Addition of shares	6,061,413,770			688,146,488	151,394,850	529,295,847	1,958,417,114		764,617,811	43,490,786	233,728,116	251,109,632	5,544,514	20,808,405	119,076,233	362,152,598		334,161,435	182,988,911	30,696,013	383,200,214	1,261,329	1,323,474
Redemption of shares	(5,309,461,386)			(392,769,799)	(105,368,702)	(565,566,944)	(1,379,911,693)		(589,272,473)	(31,362,847)	(248,556,941)	(329,701,864)			(174,833,082)	(333,515,950)	(2,210,679)	(740,742,859)	(233,856,212)	(75,003,600)	(101,889,611)	(3,716,878)	(1,180,652)
Net addition (redemption) of shares	751,952,384			295,376,689	46,026,148	(36,271,097)	578,505,421		175,345,338	12,127,939	(14,828,825)	(78,592,232)	5,544,514	20,808,405	(55,756,849)	28,636,648	(2,210,679)	(406,581,424)	(50,867,301)	(44,307,587)	281,310,603	(2,455,549)	142,822
Net investment income (loss)	(32,571,507)			(1,584,119)	(546,566)	(1,328,369)	(4,828,761)	(32,130)	(2,544,628)	(209,360)	(1,175,860)	(973,304)	(51,170)	(159,424)	(4,375,512)	(4,398,231)	(38,477)	(2,196,281)	(821,690)	(1,925,215)	(5,280,707)	(35,024)	(31,774)
Net realized gain (loss)	(921,507,900)			(144,624,652)	(28,219,941)	87,181,110	(405,797,946)	760,026	(12,299,811)	(2,584,895)	61,123,058	113,463,320	(381,830)	2,720,005	(48,055,883)	164,024,125	(1,254,295)	120,757,237	41,422,856	(165,625,006)	(701,518,468)	210,205	(1,879,101)
Change in net unrealized appreciation/depreciation	41,884,499			(16,426,828)	(3,428,310)	9,505,925	(26,361,262)	(176,434)	6,077,984	632,743	1,901,341	(21,564,801)	22,288	833,294	(588,667)	(8,704,656)	321,274	(52,715,067)	162,544	8,820,461	143,242,691	13,879	335,084
Net income (loss)	(912,194,908)			(162,635,599)	(32,194,817)	95,358,666	(436,987,969)	551,462	(8,766,455)	(2,161,512)	61,848,539	90,925,215	(410,712)	3,393,875	(53,020,062)	150,921,238	(971,498)	65,845,889	40,763,710	(158,729,760)	(563,556,484)	189,060	(1,575,791)
Shareholders' equity, end of period at Dec. 31, 2013	3,082,207,084			270,398,554	51,134,323	141,751,202	226,233,584	3,797,427	256,060,149	22,734,767	139,436,456	112,989,686	8,896,842	27,983,279	418,001,115	588,121,516	2,915,034	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	1,134,916	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)	1,134,916	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)	(34,070)	(2,415,841)	(460,907)	(857,817)	(585,841)	(118,247)	(213,183)	(3,994,145)	(3,741,601)	(30,991)	(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)	906,312	99,347,798	8,796,882	(5,312,609)	15,119,117	1,593,450	2,296,708	83,683,592	127,860,058	(1,065,579)	(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	595,037	46,381,649	2,899,237	(7,934,003)	2,807,756	418,090	(175,587)	30,499,215	(30,986,352)	(346,460)	(125,247,771)	(31,234,281)	8,888,643	(9,900,963)	(204,515)	143,775
Net income (loss)	(237,738,711)	$ 205,802	[1]	21,110,424	(9,606,005)	48,189,024	(81,171,627)	1,467,279	143,313,606	11,235,212	(14,104,429)	17,341,032	1,893,293	1,907,938	110,188,662	93,132,105	(1,443,030)	(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	6,340,845		111,459,325	21,459,575	506,556,124	351,789,953	5,264,706	169,210,110	14,688,564	81,861,762	53,007,867	14,021,804	23,120,790	517,191,349	531,471,873	2,606,920	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	11,524,992		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	8,571,369	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)	(10,281,916)		(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)	(1,233,308)	(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	1,243,076		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)	7,338,061	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)	(71,554)	[2]	(1,150,794)	(240,600)	(5,798,200)	(7,410,148)	(56,626)	(2,166,211)	(177,124)	(703,582)	(516,464)	(178,761)	(209,987)	(5,000,587)	(3,623,678)	(33,542)	(8,473,155)	(761,335)	(796,424)	(2,507,859)	(104,071)	(44,423)
Net realized gain (loss)	(1,164,531,561)	(278,197)		(19,406,840)	(3,334,581)	69,828,657	(392,223,946)	3,701,255	91,684,782	15,212,833	12,708,936	10,756,758	1,559,643	4,330,688	131,674,081	8,806,429	(2,952,171)	(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)	(47,148)		(7,346,902)	(605,352)	27,107,500	(27,664,140)	(395,296)	(33,951,907)	(6,412,461)	4,098,510	4,186,942	(142,063)	(1,164,304)	(45,497,112)	(12,347,563)	146,716	32,543,124	41,201,866	(4,309,443)	(10,182,576)	707,922	276,816
Net income (loss)	(1,244,268,436)	(396,899)	[1],[2]	(27,904,536)	(4,180,533)	91,137,957	(427,298,234)	3,249,333	55,566,664	8,623,248	16,103,864	14,427,236	1,238,819	2,956,397	81,176,382	(7,164,812)	(2,838,997)	(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	$ 7,187,022		$ 105,272,823	$ 27,650,638	$ 642,811,361	$ 547,708,740	$ 8,514,039	$ 95,897,894	$ 10,462,856	$ 74,971,764	$ 55,987,938	$ 17,510,898	$ 20,460,679	$ 522,306,518	$ 237,372,900	$ 7,105,984	$ 783,922,475	$ 38,851,184	$ 69,864,815	$ 216,416,642	$ 10,857,730	$ 5,473,848
[1]	Since the Fund commenced investment operations on October 1, 2014, the Statement of Cash Flows for the year ended December 31, 2013 has not been provided.
[2]	Since the Fund commenced investment operations on October 1, 2014, the Statement of Operations for the year ended December 31, 2013 has not been provided.

Statements of Changes in Share5

Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Addition, shares		230,297,500	80,763,760	85,440,000
Redemption, shares		159,438,928	79,572,779	75,095,573	[1]
Net addition (redemption), shares		70,858,572	1,190,981	10,343,842
Redemptions of shares related to termination of offerings under new funds value				$ 600
ProShares Managed Futures Strategy [Member]
Addition, shares	400,010	550,000
Redemption, shares	100,000	500,000
Net addition (redemption), shares	300,010	50,000
ProShares VIX Short-Term Futures ETF [Member]
Addition, shares		12,475,000	10,575,000	16,095,000
Redemption, shares		9,850,000	14,725,000	8,260,189
Net addition (redemption), shares		2,625,000	(4,150,000)	7,834,811
ProShares VIX Mid-Term Futures ETF [Member]
Addition, shares		325,000	593,750	1,512,500
Redemption, shares		150,000	918,847	1,118,750
Net addition (redemption), shares		175,000	(325,097)	393,750
ProShares Short VIX Short-Term Futures ETF [Member]
Addition, shares		24,100,000	16,100,000	11,500,000
Redemption, shares		19,700,000	9,950,000	11,900,000
Net addition (redemption), shares		4,400,000	6,150,000	(400,000)
ProShares Ultra VIX Short-Term Futures ETF [Member]
Addition, shares		72,180,000	10,215,000	1,980,000
Redemption, shares		55,481,572	8,085,458	1,326,563
Net addition (redemption), shares		16,698,428	2,129,542	653,437
ProShares UltraShort Bloomberg Crude Oil [Member]
Addition, shares		10,800,000	15,700,000	23,300,000
Redemption, shares		12,250,000	21,600,000	17,450,000
Net addition (redemption), shares		(1,450,000)	(5,900,000)	5,850,000
ProShares UltraShort Bloomberg Natural Gas [Member]
Addition, shares		450,000	2,850,000	587,500
Redemption, shares		550,000	3,000,000	387,556
Net addition (redemption), shares		(100,000)	(150,000)	199,944
ProShares UltraShort Gold [Member]
Addition, shares		150,000	550,000	2,650,000
Redemption, shares		350,000	1,050,000	2,750,000
Net addition (redemption), shares		(200,000)	(500,000)	(100,000)
ProShares UltraShort Silver [Member]
Addition, shares		1,650,000	1,800,000	6,900,000
Redemption, shares		1,700,000	3,400,000	8,300,000
Net addition (redemption), shares		(50,000)	(1,600,000)	(1,400,000)
ProShares Short Euro [Member]
Addition, shares		550,000	250,000	150,000
Redemption, shares		500,000	150,000	0
Net addition (redemption), shares		50,000	100,000	150,000
ProShares UltraShort Australian Dollar [Member]
Addition, shares		50,000	0	500,000
Redemption, shares		150,000	150,000	0
Net addition (redemption), shares		(100,000)	(150,000)	500,000
ProShares UltraShort Euro [Member]
Addition, shares		12,600,000	4,500,000	6,250,000
Redemption, shares		16,100,000	5,050,000	9,450,000
Net addition (redemption), shares		(3,500,000)	(550,000)	(3,200,000)
ProShares UltraShort Yen [Member]
Addition, shares		1,350,000	2,850,000	5,650,000
Redemption, shares		4,600,000	5,200,000	5,400,000
Net addition (redemption), shares		(3,250,000)	(2,350,000)	250,000
ProShares Ultra Bloomberg Commodity [Member]
Addition, shares		225,000	12,500	0
Redemption, shares		25,039	0	25,000
Net addition (redemption), shares		199,961	12,500	(25,000)
ProShares Ultra Bloomberg Crude Oil [Member]
Addition, shares		86,830,000	10,080,000	2,290,000
Redemption, shares		33,381,967	2,090,000	4,690,000
Net addition (redemption), shares		53,448,033	7,990,000	(2,400,000)
ProShares Ultra Bloomberg Natural Gas [Member]
Addition, shares		2,137,500	1,437,500	1,350,000
Redemption, shares		1,187,815	700,000	1,412,500
Net addition (redemption), shares		949,685	737,500	(62,500)
ProShares Ultra Gold [Member]
Addition, shares		150,000	300,000	550,000
Redemption, shares		350,000	950,000	1,350,000
Net addition (redemption), shares		(200,000)	(650,000)	(800,000)
ProShares Ultra Silver [Member]
Addition, shares		2,700,000	2,487,500	4,112,500
Redemption, shares		2,100,000	2,440,974	1,112,500
Net addition (redemption), shares		600,000	46,526	3,000,000
ProShares Ultra Euro [Member]
Addition, shares		950,000	50,000	50,000
Redemption, shares		400,000	0	150,000
Net addition (redemption), shares		550,000	50,000	(100,000)
ProShares Ultra Yen [Member]
Addition, shares		75,000	12,500	12,500
Redemption, shares		12,530	12,500	12,500
Net addition (redemption), shares		62,470	0	0
[1]	Amount includes $600 of redemptions related to the termination of offerings of certain Funds.

Statements of Cash Flows

Statements of Cash Flows - USD ($)		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Cash flow from operating activities
Net income (loss)		$ (1,244,268,436)		$ (237,738,711)	$ (912,194,908)
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		35,477,903		(61,515,085)	(93,386,617)
Purchases of short-term U.S. government and agency obligations		(17,070,603,480)		(12,667,505,150)	(16,624,948,160)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		16,764,420,326		12,509,293,100	17,115,395,982
Net amortization and accretion on short-term U.S. government and agency obligations		(1,530,269)		(1,148,962)	(1,552,346)
Net realized gain (loss) on investments		(47,732)		(123,212)	(79,408)
Change in unrealized appreciation/depreciation on investments		79,893,405		55,258,334	(95,213,503)
Decrease (Increase) in receivable on futures contracts		28,346,999		(49,071,751)	2,682,450
Decrease (Increase) in Limitation by Sponsor		9,474		(9,474)	5,373
Change in offering cost		49,384		(49,384)	64,027
Increase (Decrease) in management fee payable		181,800		134,637	(206,989)
Increase (Decrease) in brokerage commissions and fees payable		39,148
Increase (Decrease) in payable on futures contracts		(43,327,729)		36,334,537	(64,914,699)
Increase (Decrease) in payable for offering costs		(65,785)		65,785	(123,000)
Net cash provided by (used in) operating activities		(1,451,424,992)		(416,075,336)	(674,471,798)
Cash flow from financing activities
Proceeds from addition of shares		8,953,972,200		5,304,403,567	6,098,182,208
Payment on shares redeemed		(7,490,397,088)		(4,875,819,732)	(5,420,279,034)
Net cash provided by (used in) financing activities		1,463,575,112		428,583,835	677,903,174
Net increase (decrease) in cash		12,150,120		12,508,499	3,431,376
Cash, beginning of period		35,899,231		23,390,732	19,959,356
Cash, end of period		48,049,351		35,899,231	23,390,732
ProShares Managed Futures Strategy [Member]
Cash flow from operating activities
Net income (loss)	[1]	(396,899)	[2]	205,802
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]	(85,180)		(195,142)
Decrease (Increase) in receivable on futures contracts	[1]	17,445		(17,445)
Decrease (Increase) in Limitation by Sponsor	[1]	9,474		(9,474)
Change in offering cost	[1]	49,384		(49,384)
Increase (Decrease) in management fee payable	[1]	4,291
Increase (Decrease) in brokerage commissions and fees payable	[1]	164
Increase (Decrease) in payable on futures contracts	[1]	19,990
Increase (Decrease) in payable for offering costs	[1]	(65,785)		65,785
Net cash provided by (used in) operating activities	[1]	(447,116)		142
Cash flow from financing activities
Proceeds from addition of shares	[1]	11,524,992		8,174,604
Payment on shares redeemed	[1]	(10,281,916)		(2,039,561)
Net cash provided by (used in) financing activities	[1]	1,243,076		6,135,043
Net increase (decrease) in cash	[1]	795,960		6,135,185
Cash, beginning of period	[1]	6,135,185
Cash, end of period	[1]	6,931,145		6,135,185
ProShares VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)		(27,904,536)		21,110,424	(162,635,599)
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		12,551,205		45,580,600	(29,910,352)
Purchases of short-term U.S. government and agency obligations		(599,166,468)		(674,817,750)	(1,149,809,572)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		585,220,876		800,418,587	1,086,309,043
Net amortization and accretion on short-term U.S. government and agency obligations		(41,722)		(46,740)	(77,010)
Net realized gain (loss) on investments		(1,703)		(12,242)	6,516
Change in unrealized appreciation/depreciation on investments		3,657		6,229	(4,439)
Decrease (Increase) in receivable on futures contracts		8,053,303		(6,138,219)	(3,179,017)
Increase (Decrease) in management fee payable		(3,334)		(128,002)	102,304
Increase (Decrease) in payable on futures contracts					(31,540,181)
Net cash provided by (used in) operating activities		(21,288,722)		185,972,887	(290,738,307)
Cash flow from financing activities
Proceeds from addition of shares		187,659,682		228,373,046	690,664,556
Payment on shares redeemed		(165,941,648)		(416,984,894)	(398,582,455)
Net cash provided by (used in) financing activities		21,718,034		(188,611,848)	292,082,101
Net increase (decrease) in cash		429,312		(2,638,961)	1,343,794
Cash, beginning of period		1,694,791		4,333,752	2,989,958
Cash, end of period		2,124,103		1,694,791	4,333,752
ProShares VIX Mid-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)		(4,180,533)		(9,606,005)	(32,194,817)
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		926,200		6,547,440	(624,390)
Purchases of short-term U.S. government and agency obligations		(95,567,067)		(161,570,392)	(290,242,216)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		93,706,007		183,523,221	324,156,552
Net amortization and accretion on short-term U.S. government and agency obligations		(8,293)		(16,573)	(25,812)
Net realized gain (loss) on investments		(1,355)		(1,742)	78
Change in unrealized appreciation/depreciation on investments		327		(187)	2,031
Decrease (Increase) in receivable on futures contracts		1,741,140		(1,682,594)	(100,734)
Increase (Decrease) in management fee payable		(2,358)		(22,712)	(13,917)
Increase (Decrease) in payable on futures contracts					(1,890,675)
Net cash provided by (used in) operating activities		(3,385,932)		17,170,456	(933,900)
Cash flow from financing activities
Proceeds from addition of shares		19,318,111		41,886,902	151,394,850
Payment on shares redeemed		(16,894,470)		(59,329,673)	(150,618,268)
Net cash provided by (used in) financing activities		2,423,641		(17,442,771)	776,582
Net increase (decrease) in cash		(962,291)		(272,315)	(157,318)
Cash, beginning of period		1,634,082		1,906,397	2,063,715
Cash, end of period		671,791		1,634,082	1,906,397
ProShares Short VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)		91,137,957		48,189,024	95,358,666
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		(38,283,455)		(51,692,300)	(12,821,153)
Purchases of short-term U.S. government and agency obligations		(2,104,319,382)		(1,647,460,143)	(675,205,073)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		2,016,127,119		1,306,143,088	623,376,707
Net amortization and accretion on short-term U.S. government and agency obligations		(180,670)		(81,544)	(36,504)
Net realized gain (loss) on investments		(35,629)		(19,363)	(6,005)
Change in unrealized appreciation/depreciation on investments		(8,936)		1,764	(1,795)
Decrease (Increase) in receivable on futures contracts				603,833	4,920,888
Increase (Decrease) in management fee payable		100,052		289,792	68,716
Increase (Decrease) in payable on futures contracts		(29,599,748)		31,020,019
Net cash provided by (used in) operating activities		(65,062,692)		(313,005,830)	35,654,447
Cash flow from financing activities
Proceeds from addition of shares		1,393,067,009		1,056,547,830	542,528,525
Payment on shares redeemed		(1,331,975,560)		(736,573,151)	(578,266,328)
Net cash provided by (used in) financing activities		61,091,449		319,974,679	(35,737,803)
Net increase (decrease) in cash		(3,971,243)		6,968,849	(83,356)
Cash, beginning of period		9,122,219		2,153,370	2,236,726
Cash, end of period		5,150,976		9,122,219	2,153,370
ProShares Ultra VIX Short-Term Futures ETF [Member]
Cash flow from operating activities
Net income (loss)		(427,298,234)		(81,171,627)	(436,987,969)
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		54,559,100		(9,805,950)	(68,374,743)
Purchases of short-term U.S. government and agency obligations		(3,411,109,730)		(2,489,268,812)	(1,990,709,180)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		3,155,524,185		2,416,241,031	1,978,712,334
Net amortization and accretion on short-term U.S. government and agency obligations		(156,187)		(72,700)	(70,006)
Net realized gain (loss) on investments		49,718		(9,921)	(18,730)
Change in unrealized appreciation/depreciation on investments		(26,647)		4,701	294,289
Decrease (Increase) in receivable on futures contracts		24,535,963		(42,531,441)
Increase (Decrease) in management fee payable		124,528		113,369	92,830
Increase (Decrease) in payable on futures contracts				(3,356,803)	(32,309,932)
Net cash provided by (used in) operating activities		(603,797,304)		(209,858,153)	(549,371,107)
Cash flow from financing activities
Proceeds from addition of shares		3,172,328,095		1,645,206,121	1,965,640,739
Payment on shares redeemed		(2,563,186,119)		(1,433,851,653)	(1,415,819,480)
Net cash provided by (used in) financing activities		609,141,976		211,354,468	549,821,259
Net increase (decrease) in cash		5,344,672		1,496,315	450,152
Cash, beginning of period		3,737,292		2,240,977	1,790,825
Cash, end of period		9,081,964		3,737,292	2,240,977
ProShares UltraShort Bloomberg Commodity [Member]
Cash flow from operating activities
Net income (loss)		3,249,333		1,467,279	551,462
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		(16,569,217)		(10,193,241)	(11,125,326)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		13,287,999		9,414,931	10,476,996
Net amortization and accretion on short-term U.S. government and agency obligations		(2,698)		(1,232)	(1,899)
Net realized gain (loss) on investments		(16)		(3)	(24)
Change in unrealized appreciation/depreciation on investments		395,296		(595,037)	176,434
Increase (Decrease) in management fee payable		2,977		824	483
Net cash provided by (used in) operating activities		363,674		93,521	78,126
Cash flow from financing activities
Net increase (decrease) in cash		363,674		93,521	78,126
Cash, beginning of period		467,766		374,245	296,119
Cash, end of period		831,440		467,766	374,245
ProShares UltraShort Bloomberg Crude Oil [Member]
Cash flow from operating activities
Net income (loss)		55,566,664		143,313,606	(8,766,455)
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		2,138,235		(4,659,270)	(3,232,021)
Purchases of short-term U.S. government and agency obligations		(1,238,357,695)		(1,127,199,240)	(1,381,886,204)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,290,330,607		1,243,311,872	1,221,473,521
Net amortization and accretion on short-term U.S. government and agency obligations		(60,884)		(110,620)	(113,487)
Net realized gain (loss) on investments		(14,458)		(20,701)	(5,188)
Change in unrealized appreciation/depreciation on investments		20,609,817		(29,342,273)	(3,281,036)
Decrease (Increase) in receivable on futures contracts		1,293,531		210,412	(1,503,943)
Increase (Decrease) in management fee payable		(27,242)		(73,442)	131,573
Increase (Decrease) in brokerage commissions and fees payable		8,453
Increase (Decrease) in payable on futures contracts		850,883			(979,336)
Net cash provided by (used in) operating activities		132,337,911		225,430,344	(178,162,576)
Cash flow from financing activities
Proceeds from addition of shares		796,070,368		474,919,955	768,649,288
Payment on shares redeemed		(928,803,902)		(701,228,946)	(589,272,473)
Net cash provided by (used in) financing activities		(132,733,534)		(226,308,991)	179,376,815
Net increase (decrease) in cash		(395,623)		(878,647)	1,214,239
Cash, beginning of period		994,268		1,872,915	658,676
Cash, end of period		598,645		994,268	1,872,915
ProShares UltraShort Bloomberg Natural Gas [Member]
Cash flow from operating activities
Net income (loss)		8,623,248		11,235,212	(2,161,512)
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		2,359,170		(2,021,030)	(589,770)
Purchases of short-term U.S. government and agency obligations		(59,678,558)		(208,007,837)	(111,087,096)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		60,242,291		217,631,381	102,863,931
Net amortization and accretion on short-term U.S. government and agency obligations		(5,830)		(16,306)	(8,620)
Net realized gain (loss) on investments		(29)		(5,163)	(619)
Change in unrealized appreciation/depreciation on investments		(168)		(72)	422
Decrease (Increase) in receivable on futures contracts		923,531		597,017	(887,771)
Increase (Decrease) in management fee payable		620		309	(2,317)
Increase (Decrease) in brokerage commissions and fees payable		1,908
Increase (Decrease) in payable on futures contracts		785,170
Net cash provided by (used in) operating activities		13,251,353		19,413,511	(11,873,352)
Cash flow from financing activities
Proceeds from addition of shares		37,204,187		119,491,987	43,490,786
Payment on shares redeemed		(50,053,143)		(138,773,402)	(31,362,847)
Net cash provided by (used in) financing activities		(12,848,956)		(19,281,415)	12,127,939
Net increase (decrease) in cash		402,397		132,096	254,587
Cash, beginning of period		696,743		564,647	310,060
Cash, end of period		1,099,140		696,743	564,647
ProShares UltraShort Gold [Member]
Cash flow from operating activities
Net income (loss)		16,103,864		(14,104,429)	61,848,539
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		(82,450)		7,150	(1,100)
Purchases of short-term U.S. government and agency obligations		(254,497,395)		(320,898,147)	(678,813,513)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		265,587,947		385,891,756	618,459,986
Net amortization and accretion on short-term U.S. government and agency obligations		(31,999)		(40,646)	(61,891)
Net realized gain (loss) on investments		(1,301)		(3,873)	1,351
Change in unrealized appreciation/depreciation on investments		(4,088,770)		7,914,963	(1,902,061)
Decrease (Increase) in receivable on futures contracts		3,260		(2,960)	(300)
Increase (Decrease) in management fee payable		(10,170)		(53,758)	49,243
Increase (Decrease) in payable on futures contracts		80			(3,980)
Net cash provided by (used in) operating activities		22,983,066		58,710,056	(423,726)
Cash flow from financing activities
Proceeds from addition of shares		13,383,255		51,784,693	233,728,116
Payment on shares redeemed		(36,377,117)		(110,529,962)	(233,281,937)
Net cash provided by (used in) financing activities		(22,993,862)		(58,745,269)	446,179
Net increase (decrease) in cash		(10,796)		(35,213)	22,453
Cash, beginning of period		162,434		197,647	175,194
Cash, end of period		151,638		162,434	197,647
ProShares UltraShort Silver [Member]
Cash flow from operating activities
Net income (loss)		14,427,236		17,341,032	90,925,215
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		7,700	2,200
Purchases of short-term U.S. government and agency obligations		(220,073,123)		(243,452,982)	(593,520,715)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		221,589,835		306,085,077	564,965,005
Net amortization and accretion on short-term U.S. government and agency obligations		(23,831)		(30,901)	(60,178)
Net realized gain (loss) on investments		2,787		(4,234)	(6,916)
Change in unrealized appreciation/depreciation on investments		(4,182,532)		(2,820,396)	21,538,981
Decrease (Increase) in receivable on futures contracts		6,380		(4,320)	(2,450)
Increase (Decrease) in management fee payable		4,831		(51,786)	8,515
Increase (Decrease) in payable on futures contracts					(2,520)
Net cash provided by (used in) operating activities		11,754,443		77,069,190	83,847,137
Cash flow from financing activities
Proceeds from addition of shares		84,272,164		72,497,634	251,109,632
Payment on shares redeemed		(95,719,329)		(149,820,485)	(334,839,980)
Net cash provided by (used in) financing activities		(11,447,165)		(77,322,851)	(83,730,348)
Net increase (decrease) in cash		307,278		(253,661)	116,789
Cash, beginning of period		207,506		461,167	344,378
Cash, end of period		514,784		207,506	461,167
ProShares Short Euro [Member]
Cash flow from operating activities
Net income (loss)		1,238,819		1,893,293	(410,712)
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		(260,865)		(114,180)	(65,450)
Purchases of short-term U.S. government and agency obligations		(56,503,913)		(36,652,485)	(21,563,433)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		53,441,831		32,472,610	17,073,898
Net amortization and accretion on short-term U.S. government and agency obligations		(4,504)		(4,716)	(1,997)
Net realized gain (loss) on investments		(218)		(402)	(157)
Change in unrealized appreciation/depreciation on investments		170		472	(463)
Decrease (Increase) in receivable on futures contracts		(20,985)		(54,150)	(2,488)
Decrease (Increase) in Limitation by Sponsor					2,145
Change in offering cost					19,770
Increase (Decrease) in management fee payable		2,967		4,134	6,994
Increase (Decrease) in payable for offering costs					(41,000)
Net cash provided by (used in) operating activities		(2,106,698)		(2,455,424)	(4,982,893)
Cash flow from financing activities
Proceeds from addition of shares		23,563,492		8,924,282	5,544,514
Payment on shares redeemed		(21,313,217)		(5,692,613)
Net cash provided by (used in) financing activities		2,250,275		3,231,669	5,544,514
Net increase (decrease) in cash		143,577		776,245	561,621
Cash, beginning of period		1,640,225		863,980	302,359
Cash, end of period		1,783,802		1,640,225	863,980
ProShares UltraShort Australian Dollar [Member]
Cash flow from operating activities
Net income (loss)		2,956,397		1,907,938	3,393,875
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		963,152		121,418	(997,095)
Purchases of short-term U.S. government and agency obligations		(61,647,966)		(41,309,385)	(69,157,620)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		63,512,421		45,247,467	48,268,878
Net amortization and accretion on short-term U.S. government and agency obligations		(5,998)		(8,225)	(5,653)
Net realized gain (loss) on investments		(225)		(492)	74
Change in unrealized appreciation/depreciation on investments		553		1,463	(1,279)
Decrease (Increase) in receivable on futures contracts		10,043		(62,534)
Decrease (Increase) in Limitation by Sponsor					2,216
Change in offering cost					22,129
Increase (Decrease) in management fee payable		(1,630)		(3,620)	22,017
Increase (Decrease) in payable on futures contracts				(86,166)	75,216
Increase (Decrease) in payable for offering costs					(41,000)
Net cash provided by (used in) operating activities		5,786,747		5,807,864	(18,418,242)
Cash flow from financing activities
Proceeds from addition of shares		2,764,167			20,808,405
Payment on shares redeemed		(8,380,675)		(6,770,427)
Net cash provided by (used in) financing activities		(5,616,508)		(6,770,427)	20,808,405
Net increase (decrease) in cash		170,239		(962,563)	2,390,163
Cash, beginning of period		1,788,757		2,751,320	361,157
Cash, end of period		1,958,996		1,788,757	2,751,320
ProShares UltraShort Euro [Member]
Cash flow from operating activities
Net income (loss)		81,176,382		110,188,662	(53,020,062)
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		(1,901,774,819)		(1,291,071,881)	(2,234,974,275)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,842,981,707		1,241,999,870	2,350,802,065
Net amortization and accretion on short-term U.S. government and agency obligations		(263,820)		(199,596)	(224,966)
Net realized gain (loss) on investments		(22,509)		(4,637)	(7,153)
Change in unrealized appreciation/depreciation on investments		45,497,112		(30,499,215)	588,667
Increase (Decrease) in management fee payable		28,455		40,427	(153,734)
Net cash provided by (used in) operating activities		67,622,508		30,453,630	63,010,542
Cash flow from financing activities
Proceeds from addition of shares		341,209,778		71,794,729	119,076,233
Payment on shares redeemed		(399,206,157)		(101,720,845)	(182,144,207)
Net cash provided by (used in) financing activities		(57,996,379)		(29,926,116)	(63,067,974)
Net increase (decrease) in cash		9,626,129		527,514	(57,432)
Cash, beginning of period		746,454		218,940	276,372
Cash, end of period		10,372,583		746,454	218,940
ProShares UltraShort Yen [Member]
Cash flow from operating activities
Net income (loss)		(7,164,812)		93,132,105	150,921,238
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		(1,322,695,643)		(1,219,436,703)	(2,181,412,341)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		1,595,758,281		1,245,266,414	1,985,795,270
Net amortization and accretion on short-term U.S. government and agency obligations		(135,814)		(197,253)	(209,600)
Net realized gain (loss) on investments		3,035		(13,833)	(4,527)
Change in unrealized appreciation/depreciation on investments		12,347,563		30,986,352	8,704,656
Increase (Decrease) in management fee payable		(228,916)		2,264	166,305
Net cash provided by (used in) operating activities		277,883,694		149,739,346	(36,038,999)
Cash flow from financing activities
Proceeds from addition of shares		124,524,909		216,403,570	369,766,231
Payment on shares redeemed		(402,664,341)		(366,185,318)	(333,515,950)
Net cash provided by (used in) financing activities		(278,139,432)		(149,781,748)	36,250,281
Net increase (decrease) in cash		(255,738)		(42,402)	211,282
Cash, beginning of period		532,706		575,108	363,826
Cash, end of period		276,968		532,706	575,108
ProShares Ultra Bloomberg Commodity [Member]
Cash flow from operating activities
Net income (loss)		(2,838,997)		(1,443,030)	(971,498)
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		(11,943,072)		(9,482,798)	(17,205,322)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		7,613,583		9,545,915	20,631,535
Net amortization and accretion on short-term U.S. government and agency obligations		(733)		(1,330)	(2,066)
Net realized gain (loss) on investments		351		(43)	44
Change in unrealized appreciation/depreciation on investments		(146,716)		346,460	(321,274)
Increase (Decrease) in management fee payable		3,468		(48)	(2,644)
Net cash provided by (used in) operating activities		(7,312,116)		(1,034,874)	2,128,775
Cash flow from financing activities
Proceeds from addition of shares		8,571,369		1,134,916
Payment on shares redeemed		(1,233,308)			(2,210,679)
Net cash provided by (used in) financing activities		7,338,061		1,134,916	(2,210,679)
Net increase (decrease) in cash		25,945		100,042	(81,904)
Cash, beginning of period		185,684		85,642	167,546
Cash, end of period		211,629		185,684	85,642
ProShares Ultra Bloomberg Crude Oil [Member]
Cash flow from operating activities
Net income (loss)		(872,084,399)		(370,328,286)	65,845,889
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		(12,966,690)		(30,783,225)	19,534,732
Purchases of short-term U.S. government and agency obligations		(4,300,690,737)		(1,059,239,810)	(1,333,100,462)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		3,970,639,458		729,547,449	1,633,468,496
Net amortization and accretion on short-term U.S. government and agency obligations		(382,657)		(68,292)	(135,296)
Net realized gain (loss) on investments		(22,728)		(11,806)	(11,289)
Change in unrealized appreciation/depreciation on investments		(3,997,651)		78,146,323	31,381,318
Decrease (Increase) in receivable on futures contracts		(5,150,763)			3,430,415
Increase (Decrease) in management fee payable		316,922		185,707	(267,682)
Increase (Decrease) in brokerage commissions and fees payable		25,000
Increase (Decrease) in payable on futures contracts		(5,817,266)		4,820,056	997,210
Net cash provided by (used in) operating activities		(1,230,131,511)		(647,731,884)	421,143,331
Cash flow from financing activities
Proceeds from addition of shares		2,529,448,592		979,031,080	334,161,435
Payment on shares redeemed		(1,297,658,086)		(329,639,408)	(756,814,102)
Net cash provided by (used in) financing activities		1,231,790,506		649,391,672	(422,652,667)
Net increase (decrease) in cash		1,658,995		1,659,788	(1,509,336)
Cash, beginning of period		2,349,384		689,596	2,198,932
Cash, end of period		4,008,379		2,349,384	689,596
ProShares Ultra Bloomberg Natural Gas [Member]
Cash flow from operating activities
Net income (loss)		(60,331,945)		(38,222,590)	40,763,710
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		13,538,800		(14,531,880)	3,661,890
Purchases of short-term U.S. government and agency obligations		(262,203,648)		(269,350,242)	(417,636,625)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		288,829,035		274,880,518	423,069,003
Net amortization and accretion on short-term U.S. government and agency obligations		(18,846)		(15,961)	(33,341)
Net realized gain (loss) on investments		(4,341)		(5,068)	(4,691)
Change in unrealized appreciation/depreciation on investments		296		1,537	(2,133)
Decrease (Increase) in receivable on futures contracts		(3,065,769)
Increase (Decrease) in management fee payable		(40,680)		(15,937)	29,802
Increase (Decrease) in brokerage commissions and fees payable		3,623
Increase (Decrease) in payable on futures contracts		(9,552,314)		3,923,782	736,749
Net cash provided by (used in) operating activities		(32,845,789)		(43,335,841)	50,584,364
Cash flow from financing activities
Proceeds from addition of shares		87,380,298		168,002,793	182,988,911
Payment on shares redeemed		(54,776,954)		(126,116,197)	(233,856,212)
Net cash provided by (used in) financing activities		32,603,344		41,886,596	(50,867,301)
Net increase (decrease) in cash		(242,445)		(1,449,245)	(282,937)
Cash, beginning of period		1,653,582		3,102,827	3,385,764
Cash, end of period		1,411,137		1,653,582	3,102,827
ProShares Ultra Gold [Member]
Cash flow from operating activities
Net income (loss)		(23,712,075)		(1,941,677)	(158,729,760)
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		550		7,150	(1,100)
Purchases of short-term U.S. government and agency obligations		(260,988,119)		(407,203,130)	(923,993,097)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		291,047,782		446,217,714	1,133,855,965
Net amortization and accretion on short-term U.S. government and agency obligations		(42,700)		(54,755)	(130,437)
Net realized gain (loss) on investments		393		(1,361)	(7,780)
Change in unrealized appreciation/depreciation on investments		4,299,663		(8,869,503)	(8,819,781)
Decrease (Increase) in receivable on futures contracts		(80)			3,980
Increase (Decrease) in management fee payable		(28,602)		(25,929)	(167,707)
Increase (Decrease) in payable on futures contracts		(3,260)		2,960	300
Net cash provided by (used in) operating activities		10,573,552		28,131,469	42,010,583
Cash flow from financing activities
Proceeds from addition of shares		5,401,300		13,559,078	30,696,013
Payment on shares redeemed		(15,827,473)		(41,728,968)	(72,906,375)
Net cash provided by (used in) financing activities		(10,426,173)		(28,169,890)	(42,210,362)
Net increase (decrease) in cash		147,379		(38,421)	(199,779)
Cash, beginning of period		104,145		142,566	342,345
Cash, end of period		251,524		104,145	142,566
ProShares Ultra Silver [Member]
Cash flow from operating activities
Net income (loss)		(91,000,185)		(169,412,765)	(563,556,484)
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)		7,700	2,200
Purchases of short-term U.S. government and agency obligations		(835,846,036)		(1,432,093,309)	(2,495,134,063)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		902,567,408		1,594,662,608	2,918,654,096
Net amortization and accretion on short-term U.S. government and agency obligations		(156,353)		(177,671)	(348,317)
Net realized gain (loss) on investments		441		(8,226)	(14,261)
Change in unrealized appreciation/depreciation on investments		10,175,106		9,913,603	(143,216,871)
Decrease (Increase) in receivable on futures contracts					2,520
Increase (Decrease) in management fee payable		(72,982)		(125,078)	(277,880)
Increase (Decrease) in payable on futures contracts		(4,895)		4,320	2,450
Net cash provided by (used in) operating activities		(14,340,356)		2,771,182	(283,886,610)
Cash flow from financing activities
Proceeds from addition of shares		96,078,803		144,929,400	385,349,171
Payment on shares redeemed		(81,799,551)		(147,858,579)	(101,889,611)
Net cash provided by (used in) financing activities		14,279,252		(2,929,179)	283,459,560
Net increase (decrease) in cash		(61,104)		(157,997)	(427,050)
Cash, beginning of period		305,004		463,001	890,051
Cash, end of period		243,900		305,004	463,001
ProShares Ultra Euro [Member]
Cash flow from operating activities
Net income (loss)		(1,378,466)		(647,290)	189,060
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		(42,137,395)		(7,297,855)	(15,171,747)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		32,950,150		7,338,926	17,264,860
Net amortization and accretion on short-term U.S. government and agency obligations		(2,797)		(1,083)	(1,901)
Net realized gain (loss) on investments		109		(5)	(55)
Change in unrealized appreciation/depreciation on investments		(707,922)		204,515	(13,879)
Increase (Decrease) in management fee payable		8,041		(718)	(1,152)
Net cash provided by (used in) operating activities		(11,268,280)		(403,510)	2,265,186
Cash flow from financing activities
Proceeds from addition of shares		15,916,613		1,024,904	1,261,329
Payment on shares redeemed		(5,092,140)			(3,716,878)
Net cash provided by (used in) financing activities		10,824,473		1,024,904	(2,455,549)
Net increase (decrease) in cash		(443,807)		621,394	(190,363)
Cash, beginning of period		671,117		49,723	240,086
Cash, end of period		227,310		671,117	49,723
ProShares Ultra Yen [Member]
Cash flow from operating activities
Net income (loss)		(240,514)		(417,391)	(1,575,791)
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		(12,557,564)		(5,540,122)	(14,074,486)
Proceeds from sales or maturities of short-term U.S. government and agency obligations		8,779,817		7,181,715	15,735,808
Net amortization and accretion on short-term U.S. government and agency obligations		(3,609)		(1,101)	(1,795)
Net realized gain (loss) on investments		(6)		(94)	(68)
Change in unrealized appreciation/depreciation on investments		(276,816)		(143,775)	(335,084)
Increase (Decrease) in management fee payable		2,810		(822)	(1,323)
Net cash provided by (used in) operating activities		(4,295,882)		1,078,410	(252,739)
Cash flow from financing activities
Proceeds from addition of shares		4,285,016		716,043	1,323,474
Payment on shares redeemed		(688,682)		(975,650)	(1,180,652)
Net cash provided by (used in) financing activities		3,596,334		(259,607)	142,822
Net increase (decrease) in cash		(699,548)		818,803	(109,917)
Cash, beginning of period		846,919		28,116	138,033
Cash, end of period		$ 147,371		$ 846,919	$ 28,116
[1]	Since the Fund commenced investment operations on October 1, 2014, the Statement of Cash Flows for the year ended December 31, 2013 has not been provided.
[2]	Since the Fund commenced investment operations on October 1, 2014, the Statement of Operations for the year ended December 31, 2013 has not been provided.

Statements of Financial Condit7

Statements of Financial Condition (Parenthetical) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Short-term U.S. government and agency obligations, cost	$ 3,313,585,456	$ 3,005,824,301
ProShares VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	96,075,481	82,086,464
ProShares VIX Mid-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	25,975,462	24,104,754
ProShares Short VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	535,381,199	446,972,637
ProShares Ultra VIX Short-Term Futures ETF [Member]
Short-term U.S. government and agency obligations, cost	438,333,277	182,641,263
ProShares UltraShort Bloomberg Commodity [Member]
Short-term U.S. government and agency obligations, cost	7,517,328	4,233,396
ProShares UltraShort Bloomberg Crude Oil [Member]
Short-term U.S. government and agency obligations, cost	79,694,797	131,592,367
ProShares UltraShort Bloomberg Natural Gas [Member]
Short-term U.S. government and agency obligations, cost	8,114,653	8,672,527
ProShares UltraShort Gold [Member]
Short-term U.S. government and agency obligations, cost	72,981,653	84,038,905
ProShares UltraShort Silver [Member]
Short-term U.S. government and agency obligations, cost	50,730,044	52,225,712
ProShares Short Euro [Member]
Short-term U.S. government and agency obligations, cost	15,153,202	12,086,398
ProShares UltraShort Australian Dollar [Member]
Short-term U.S. government and agency obligations, cost	18,409,449	20,267,681
ProShares UltraShort Euro [Member]
Short-term U.S. government and agency obligations, cost	546,177,230	487,097,789
ProShares UltraShort Yen [Member]
Short-term U.S. government and agency obligations, cost	260,014,650	532,944,509
ProShares Ultra Bloomberg Commodity [Member]
Short-term U.S. government and agency obligations, cost	7,084,754	2,754,883
ProShares Ultra Bloomberg Crude Oil [Member]
Short-term U.S. government and agency obligations, cost	797,652,302	467,195,638
ProShares Ultra Bloomberg Natural Gas [Member]
Short-term U.S. government and agency obligations, cost	26,806,648	53,408,848
ProShares Ultra Gold [Member]
Short-term U.S. government and agency obligations, cost	71,908,280	101,925,636
ProShares Ultra Silver [Member]
Short-term U.S. government and agency obligations, cost	238,900,176	305,465,636
ProShares Ultra Euro [Member]
Short-term U.S. government and agency obligations, cost	11,605,665	2,415,732
ProShares Ultra Yen [Member]
Short-term U.S. government and agency obligations, cost	$ 5,069,206	$ 1,287,844

Organization

Organization	12 Months Ended
	Dec. 31, 2015
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, 2015, the following twenty-one series of the Trust have commenced investment operations: (i) ProShares Managed Futures Strategy (the “Managed Futures Fund”); (ii) ProShares VIX Short-Term Futures ETF and ProShares VIX Mid-Term Futures ETF (each, a “Matching VIX Fund” and collectively, the “Matching VIX Funds”); (iii) ProShares Short VIX Short-Term Futures ETF and ProShares Ultra VIX Short-Term Futures ETF (each, a “Geared VIX Fund” and collectively, the “Geared VIX Funds”); and (iv) ProShares UltraShort Bloomberg Commodity, ProShares UltraShort Bloomberg Crude Oil, ProShares UltraShort Bloomberg Natural Gas, ProShares UltraShort Gold, ProShares UltraShort Silver, ProShares UltraShort Australian Dollar, ProShares UltraShort Euro, ProShares UltraShort Yen, ProShares Ultra Bloomberg Commodity, ProShares Ultra Bloomberg Crude Oil, ProShares Ultra Bloomberg Natural Gas, ProShares Ultra Gold, ProShares Ultra Silver, ProShares Ultra Euro and ProShares Ultra Yen (each, a “Leveraged Fund” and collectively, the “Leveraged Funds”); and (v) ProShares Short Euro (the “Short Euro Fund”). Each of the Funds listed above issues common units of beneficial interest (“Shares”), which represent units of fractional undivided beneficial interest in and ownership of only that Fund. The Shares of each Fund are listed on the New York Stock Exchange Archipelago (“NYSE Arca”). The Leveraged Funds, the Short Euro Fund and the Geared VIX Funds, are collectively referred to as the “Geared Funds” in these Notes to Financial Statements. The Geared VIX Funds and the Matching VIX Funds are collectively referred to as the “VIX Funds” in these Notes to Financial Statements. On May 22, 2015, the Trust announced plans to liquidate ProShares Ultra Australian Dollar (ticker symbol: GDAY). ProShares Ultra Australian Dollar was closed to purchases and redemptions as of the close of regular trading on the NYSE Arca on June 18, 2015. Beginning June 19, 2015, no secondary market for ProShares Ultra Australian Dollar’s Shares remained. Proceeds of the liquidation were distributed to shareholders on June 29, 2015. Any shareholders remaining in the fund on June 29, 2015 automatically had their shares redeemed for cash at ProShares Ultra Australian Dollar’s net asset value per Share as of June 19, 2015. On June 30, 2015, the NYSE Arca filed a Form 25 removing the listing of ProShares Ultra Australian Dollar on the NYSE Arca. On July 10, 2015 a Form 15 was filed with the U.S. Securities and Exchange Commission (“SEC”) terminating the registration of ProShares Ultra Australian Dollar. 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 Commodity, ProShares UltraShort Bloomberg Crude Oil, ProShares UltraShort Gold, ProShares UltraShort Silver, ProShares UltraShort Euro, ProShares UltraShort Yen, ProShares Ultra Bloomberg Commodity, 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) of the daily performance of its corresponding benchmark. Each “UltraShort” Fund seeks daily investment results (before fees and expenses) that correspond to two times the inverse (-2x) of the daily performance of its corresponding benchmark. Each “Ultra” Fund seeks daily investment results (before fees and expenses) that correspond to two times (2x) the daily performance of its corresponding benchmark. Each Matching VIX Fund and the Managed Futures Fund seeks investment results (before fees and expenses), both over a single day and over time, that match the performance of its corresponding benchmark. Daily performance is measured from the calculation of one NAV to the next. 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 or 2x) of the period return of the corresponding benchmark and will likely differ significantly. The Matching VIX Funds and the Managed Futures Fund seek to achieve their stated investment objective both over a single day and over time. 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, 2013, 2014 and 2015. 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 VIX Short-Term Futures ETF June 10, 2013 1-for-5 reverse Share split June 10, 2013 ProShares VIX Mid-Term Futures ETF November 6, 2014 1-for-4 reverse Share split November 6, 2014 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 June 10, 2013 1-for-10 reverse Share June 10, 2013 ProShares Ultra VIX Short-Term Futures ETF January 21, 2014 1-for-4 reverse Share split January 24, 2014 ProShares Ultra VIX Short-Term Futures ETF May 20, 2015 1-for-5 reverse Share split May 20, 2015 ProShares UltraShort Bloomberg Natural Gas June 10, 2013 1-for-4 reverse Share split June 10, 2013 ProShares UltraShort Silver November 13, 2015 2-for-1 Share split November 13, 2015 ProShares Ultra Silver January 21, 2014 1-for-4 reverse Share split January 24, 2014 ProShares Ultra Bloomberg Commodity May 20, 2015 1-for-4 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 reverse Share split May 20, 2015 ProShares Ultra Yen May 20, 2015 1-for-4 reverse Share split May 20, 2015 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, 2015
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”). Certain prior year amounts have been reclassified to conform to the current year presentation. 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 and disclosures in these financial statements. 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, 2015 and 2014, and represents non-segregated cash with the custodian and does not include short-term investments. Final Net Asset Value for Fiscal Period The cut-off times and the times of the calculation of the Funds’ final net asset value for creation and redemption of fund Shares for the year ended December 31, 2015 were as follows. All times are Eastern Standard Time: Create/Redeem Cut-off* NAV Calculation NAV UltraShort Silver, Ultra Silver 6:30 a.m. 7:00 a.m. December 31 UltraShort Gold, Ultra Gold 9:30 a.m. 10:00 a.m. December 31 UltraShort Bloomberg Crude Oil, Ultra Bloomberg Crude Oil 2:00 p.m. 2:30 p.m. December 31 UltraShort Bloomberg Natural Gas, Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 31 UltraShort Bloomberg Commodity, Ultra Bloomberg Commodity 10:45 a.m. 2:30 p.m. December 31 Managed Futures Strategy 10:45 a.m. 3:00 p.m. December 31 UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 31 Short Euro, UltraShort Euro, Ultra Euro 3:00 p.m. 4:00 p.m. December 31 UltraShort Yen, Ultra Yen 3:00 p.m. 4:00 p.m. December 31 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 31 VIX Mid-Term Futures ETF 2:00 p.m. 4:15 p.m. December 31 * 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, 2015. 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, 2015. 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. 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, 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 Managed Futures Strategy $ — $ 57,179 $ — $ — $ — $ 57,179 VIX Short-Term Futures ETF 96,073,659 (1,078,625 ) — — — 94,995,034 VIX Mid-Term Futures ETF 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 Commodity 7,518,119 — — — 171,324 7,689,443 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 Commodity 7,084,065 — — — (183,916 ) 6,900,149 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 $ 3,313,591,600 $ 9,472,117 $ (18,224,475 ) $ (41,739,557 ) $ (65,776,525 ) $ 3,197,323,160 * 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, 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. The following table summarizes the valuation of investments at December 31, 2014 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total Managed Futures Strategy $ — $ 104,327 $ — $ — $ — $ 104,327 VIX Short-Term Futures ETF 82,088,299 6,264,620 — — — 88,352,919 VIX Mid-Term Futures ETF 24,105,906 260,665 — — — 24,366,571 Short VIX Short-Term Futures ETF 446,975,220 (16,352,149 ) — — — 430,623,071 Ultra VIX Short-Term Futures ETF 182,639,188 39,585,253 — — — 222,224,441 UltraShort Bloomberg Commodity 4,233,548 — — — 567,259 4,800,807 UltraShort Bloomberg Crude Oil 131,594,608 15,806,603 — — 27,018,077 174,419,288 UltraShort Bloomberg Natural Gas 8,672,710 3,941,465 — — — 12,614,175 UltraShort Gold 84,040,107 (4,520 ) (2,282,778 ) — — 81,752,809 UltraShort Silver 52,226,692 1,560 594,953 — — 52,823,205 Short Euro 12,086,577 385,331 — — — 12,471,908 UltraShort Australian Dollar 20,267,679 743,481 — — — 21,011,160 UltraShort Euro 487,111,117 — — 16,762,994 — 503,874,111 UltraShort Yen 532,957,746 — — (1,578,775 ) — 531,378,971 Ultra Bloomberg Commodity 2,754,900 — — — (331,338 ) 2,423,562 Ultra Bloomberg Crude Oil 467,200,736 (46,474,787 ) — — (76,181,097 ) 344,544,852 Ultra Bloomberg Natural Gas 53,410,227 (34,889,283 ) — — — 18,520,944 Ultra Gold 101,927,857 4,580 2,051,154 — — 103,983,591 Ultra Silver 305,474,211 (1,560 ) (12,395,120 ) — — 293,077,531 Ultra Euro 2,415,698 — — (103,371 ) — 2,312,327 Ultra Yen 1,287,869 — — (15,245 ) — 1,272,624 Total Trust** $ 3,003,470,895 $ (30,624,414 ) $ (12,031,791 ) $ 15,065,603 $ (48,927,099 ) $ 2,926,953,194 * 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. ** Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015. At December 31, 2014, 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, 2014, 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 fees, pit brokerage fees and other transaction related fees and expenses charged in connection with trading activities for each Fund’s investment in U.S. Commodity Futures Trading Commission (“CFTC”) regulated investments. The effects of trading spreads, financing costs/fees associated with Financial Instruments, and costs relating to the purchase of U.S. Treasury securities or similar high credit quality short-term fixed-income or similar securities would also be borne by the Funds. Brokerage commissions on futures contracts are recognized on a half-turn basis (e.g., the first half is recognized when the contract is purchased (opened) and the second half is recognized when the transaction is closed). Through July 30, 2014, the Sponsor paid brokerage commissions on VIX futures contracts for the Matching VIX Funds. On July 31, 2014, the Sponsor began paying, and is currently paying, brokerage commissions on VIX futures contracts for the Matching VIX Funds that exceed variable create/redeem fees collected by more than 0.02% of the Matching VIX Fund’s average net assets annually. 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.

Investments

Investments	12 Months Ended
	Dec. 31, 2015
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. 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 contracts that have traditionally been entered into primarily with institutional investors in over-the-counter (“OTC”) markets for a specified period, ranging from a day to more than one year. However, the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”) provides for significant reforms of the OTC derivative markets, including a requirement to execute certain swap transactions on a CFTC-regulated market and/or to clear such transactions through a CFTC-regulated central clearing organization. In a standard swap transaction, two parties agree to exchange the returns earned or realized on a particular predetermined investment, instrument or index in exchange for a fixed or floating rate of return in respect of a predetermined notional amount. Transaction or commission costs are reflected in the benchmark level at which the transaction is entered into. The gross returns to be exchanged are calculated with respect to a notional amount and the benchmark returns to which the swap is linked. Swap agreements do not involve the delivery of underlying instruments. 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 31, 2015 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 account at the Custodian to protect the counterparty against non-payment by the Funds. In the event of a default by the counterparty, the Funds will seek withdrawal of this collateral from the segregated account and may incur certain costs in exercising its right with respect to the collateral. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Funds may experience significant delays in obtaining any recovery in a bankruptcy or other reorganizational proceeding. The Funds may obtain only limited recovery or may obtain no recovery in such circumstances. 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, 2015, 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 and settlement, and segregation and minimum capital requirements applicable to intermediaries. 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 forwards (including deliverable forwards where the parties do not take delivery). Certain non-deliverable forward contracts, such as non-deliverable foreign exchange forwards, may be subject to regulation as swap agreements, including mandatory clearing. Changes in the forward markets may entail increased costs and result in burdensome reporting requirements. 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 account at the Custodian to protect the counterparty against non-payment by the Funds. In the event of a default by the counterparty, the Funds will seek withdrawal of this collateral from the segregated account and may incur certain costs in exercising its right with respect to the collateral. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, the Funds may experience significant delays in obtaining any recovery in a bankruptcy or other reorganizational proceeding. The Funds may obtain only limited recovery or may obtain no recovery in such circumstances. 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 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 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, 2015, 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 and settlement, and segregation and minimum capital requirements applicable to intermediaries. 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, 2015 Asset Derivatives Liability Derivatives Derivatives not Statements of Financial Condition Location Fund Unrealized Statements of Financial Condition Location Fund Unrealized Managed Futures Contracts Receivables on open futures contracts ProShares Managed Futures Strategy $ 100,136 * Payable on open futures contracts ProShares Managed Futures Strategy $ 42,957 * VIX Futures Contracts Receivables on open futures contracts ProShares VIX Mid-Term Futures ETF 10,005 * Payable on open futures contracts ProShares VIX Short-Term Futures ETF 1,078,625 * ProShares Short VIX Short-Term ETF 10,805,245 * ProShares VIX Mid-Term Futures ETF 354,365 * ProShares Ultra VIX Short-Term Futures ETF 11,894,466 * ProShares Short VIX Short-Term ETF 58,830 * Commodities Contracts Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Commodity 224,491 Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Commodity 53,167 ProShares UltraShort Bloomberg Crude Oil 8,877,169 * ProShares UltraShort Bloomberg Natural Gas 2,471,164 * ProShares Ultra Bloomberg Commodity 32,372 ProShares Ultra Bloomberg Commodity 216,288 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 $ 46,904,273 * Total Trust $ 163,172,713 * * 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, 2014 Asset Derivatives Liability Derivatives Derivatives not Statements of Financial Condition Location Fund Unrealized Statements of Financial Condition Location Fund Unrealized Managed Futures Contracts Receivables on open futures contracts ProShares Managed Futures Strategy $ 122,831 * Payable on open futures contracts ProShares Managed Futures Strategy $ 18,504 * VIX Futures Contracts Receivables on open futures contracts ProShares VIX Short-Term Futures ETF 6,264,620 * Payable on open futures contracts ProShares VIX Mid-Term Futures ETF 222,845 * ProShares VIX Mid-Term Futures ETF 483,510 * ProShares Short VIX Short-Term ETF 16,352,149 * ProShares Ultra VIX Short-Term Futures ETF 39,585,253 * Commodities Contracts Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Commodity 567,259 Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements ProShares UltraShort Gold 2,287,298 * ProShares UltraShort Bloomberg Crude Oil 42,824,680 * ProShares UltraShort Silver 204,570 ProShares UltraShort Bloomberg Natural Gas 3,941,465 * ProShares Ultra Bloomberg Commodity 331,338 ProShares UltraShort Silver 801,083 * ProShares Ultra Bloomberg Crude Oil 122,655,884 * ProShares Ultra Gold 2,055,734 * ProShares Ultra Bloomberg Natural Gas 34,889,283 * ProShares Ultra Silver 12,396,680 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts ProShares Short Euro 385,331 * Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts ProShares UltraShort Euro 2,256,771 ProShares UltraShort Australian Dollar 743,481 * ProShares UltraShort Yen 2,149,924 ProShares UltraShort Euro 19,019,765 ProShares Ultra Euro 106,292 ProShares UltraShort Yen 571,149 ProShares Ultra Yen 15,649 ProShares Ultra Euro 2,921 ProShares Ultra Yen 404 Total Trust** $ 117,369,486 * Total Trust $ 193,887,187 * * 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. ** Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015. 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 Fund Realized Gain Change in Unrealized Recognized in Managed Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares Managed Futures Strategy $ (278,197 ) $ (47,148 ) VIX Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term Futures ETF (19,408,543 ) (7,343,245 ) ProShares VIX Mid-Term Futures ETF (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 Commodity 3,701,239 (395,935 ) 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 Commodity (2,951,820 ) 147,422 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 contracts or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts or forward agreements 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 $ (1,164,277,383 ) $ (39,750,739 ) The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2014 Derivatives not accounted for as Location of Gain or (Loss) on Derivatives Fund Realized Gain Change in Unrealized Recognized in Managed Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares Managed Futures Strategy $ 109,006 $ 104,327 VIX Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term Futures ETF (694,347 ) 22,917,306 ProShares VIX Mid-Term Futures ETF (14,378,810 ) 5,157,354 ProShares Short VIX Short-Term Futures ETF 76,925,998 (24,469,104 ) ProShares Ultra VIX Short-Term Futures ETF (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 Commodity 906,309 594,924 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 Commodity (1,065,622 ) (346,416 ) 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 contracts or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts or forward agreements 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* $ (160,255,767 ) $ (46,030,931 ) * Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015. The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2013 Derivatives not accounted for as Location of Gain or (Loss) on Derivatives Fund Realized Gain Change in Unrealized Recognized in VIX Futures Contracts Net realized gain (loss) on futures contracts and/or swap agreements /changes in unrealized appreciation/ depreciation on futures contracts and/or swap agreements ProShares VIX Short-Term Futures ETF $ (144,618,136 ) $ (16,431,267 ) ProShares VIX Mid-Term Futures ETF (28,219,863 ) (3,426,279 ) ProShares Short VIX Short-Term Futures ETF 87,175,105 9,504,130 ProShares Ultra VIX Short-Term Futures ETF (405,816,676 ) (26,368,324 ) 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 Commodity 760,002 (176,167 ) ProShares UltraShort Bloomberg Crude Oil (12,304,999 ) 6,071,108 ProShares UltraShort Bloomberg Natural Gas (2,585,514 ) 633,165 ProShares UltraShort Gold 61,124,409 1,902,477 ProShares UltraShort Silver 113,456,404 (21,561,362 ) ProShares Ultra Bloomberg Commodity (1,254,251 ) 321,346 ProShares Ultra Bloomberg Crude Oil 120,745,948 (52,709,476 ) ProShares Ultra Bloomberg Natural Gas 41,418,165 160,411 ProShares Ultra Gold (165,632,786 ) 8,839,764 ProShares Ultra Silver (701,532,729 ) 143,273,646 Foreign Exchange 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 Short Euro (381,987 ) 21,825 ProShares UltraShort Australian Dollar 2,720,079 832,015 ProShares UltraShort Euro (48,063,036 ) (600,935 ) ProShares UltraShort Yen 164,019,598 (8,727,491 ) ProShares Ultra Euro 210,150 13,803 ProShares Ultra Yen (1,879,169 ) 334,987 Total Trust* $ (920,659,286 ) $ 41,907,376 * Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015. 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, 2015 and 2014: Fair Values of Derivative Instruments as of December 31, 2015 Assets Liabilities Gross Gross Net Amounts of Gross Gross Net Amounts of ProShares UltraShort Bloomberg Commodity Swap agreements $ 224,491 $ — $ 224,491 $ 53,167 $ — $ 53,167 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 Commodity Swap agreements 32,372 — 32,372 216,288 — 216,288 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 Funds or the counterparties, depending on whether the related contracts are in an appreciated or depreciated p

Agreements

Agreements	12 Months Ended
	Dec. 31, 2015
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 Managed Futures Fund will pay the Sponsor a Management Fee, monthly in arrears, in an amount equal to 0.75% per annum of its average daily net assets. 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 preparation and mailing fees not exceeding 0.10% per annum of the net assets of a Fund, and report preparation and mailing expenses. Non-Recurring Fees and Expenses Each Fund pays all its non-recurring and unusual fees and expenses, if any, as determined by the Sponsor. Non-recurring and unusual fees and expenses are fees and expenses which are unexpected or unusual in nature, such as legal claims and liabilities, litigation costs or indemnification or other material expenses which are not currently anticipated obligations of the Funds. Such fees and expenses are those that are non-recurring, unexpected or unusual in nature. 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, 2015
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 did not and will not charge its Management Fee in the first year of operations of the Managed Futures Fund in an amount equal to the offering costs. The Sponsor will reimburse the Managed Futures Fund to the extent its offering costs exceed 0.75% of its average daily NAV for the first year of operations. Normal and expected expenses incurred in connection with the continuous offering of Shares of the Managed Futures 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, 2015
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 the Managed Futures 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, 2015, 2014 and 2013, 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, Year Ended December 31, Year Ended December 31, Managed Futures Strategy* $ — $ — $ N/A VIX Short-Term Futures ETF 105,024 72,020 — VIX Mid-Term Futures ETF 8,521 8,927 — Short VIX Short-Term Futures ETF 342,734 218,121 130,779 Ultra VIX Short-Term Futures ETF 1,391,292 734,298 814,195 UltraShort Bloomberg Commodity — — — UltraShort Bloomberg Crude Oil 382,054 257,458 298,261 UltraShort Bloomberg Natural Gas 8,853 26,053 7,434 UltraShort Gold 11,024 32,473 105,508 UltraShort Silver 39,354 48,832 128,850 Short Euro — — — UltraShort Australian Dollar — — — UltraShort Euro — — — UltraShort Yen — — — Ultra Bloomberg Commodity 2,194 249 487 Ultra Bloomberg Crude Oil 847,422 299,493 236,956 Ultra Bloomberg Natural Gas 13,939 30,073 42,172 Ultra Gold 4,218 12,088 23,035 Ultra Silver 38,848 65,208 107,285 Ultra Euro — — — Ultra Yen — — — Total Trust $ 3,195,477 $ 1,805,293 $ 1,894,962 * Fund commenced investment operations on October 1, 2014.

Financial Highlights

Financial Highlights	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Financial Highlights	NOTE 7 – FINANCIAL HIGHLIGHTS Selected data for a Share outstanding throughout the year ended December 31, 2015: For the Year Ended December 31, 2015 Per Share Operating Performance Managed VIX Short- VIX Mid- Short VIX Ultra VIX UltraShort UltraShort Net asset value, at December 31, 2014 $ 21.1354 $ 20.9321 $ 63.6020 $ 61.4004 $ 125.4591 $ 87.7495 $ 77.9790 Net investment income (loss) (0.1750 ) (0.1324 ) (0.5053 ) (0.8162 ) (0.7224 ) (0.9438 ) (0.7848 ) Net realized and unrealized gain (loss)# (0.4266 ) (7.5575 ) (9.1341 ) (9.7692 ) (96.6526 ) 55.1020 56.0077 Change in net asset value from operations (0.6016 ) (7.6899 ) (9.6394 ) (10.5854 ) (97.3750 ) 54.1582 55.2229 Net asset value, at December 31, 2015 $ 20.5338 $ 13.2422 $ 53.9626 $ 50.8150 $ 28.0841 $ 141.9077 $ 133.2019 Market value per share, at December 31, 2014† $ 21.28 $ 20.99 $ 63.89 $ 61.16 $ 125.75 $ 87.44 $ 76.52 Market value per share, at December 31, 2015† $ 20.76 $ 13.33 $ 53.99 $ 50.45 $ 28.35 $ 140.41 $ 133.64 Total Return, at net asset value (2.8 )% (36.7 )% (15.2 )% (17.2 )% (77.6 )% 61.7 % 70.8 % Total Return, at market value (2.4 )% (36.5 )% (15.5 )% (17.5 )% (77.5 )% 60.6 % 74.6 % Ratios to Average Net Assets Expense ratio (0.84 )% (0.95 )% (0.91 )% (1.40 )% (1.65 )% (0.95 )% (1.07 )% Expense ratio, excluding brokerage commissions (0.75 )% (0.85 )% (0.85 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% Net investment income (loss) (0.84 )% (0.92 )% (0.88 )% (1.36 )% (1.61 )% (0.91 )% (1.04 )% * See Note 1 of these Notes to 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 UltraShort UltraShort Short UltraShort UltraShort UltraShort Net asset value, at December 31, 2014 $ 83.9577 $ 96.6516 $ 57.8071 $ 40.0617 $ 51.3790 $ 21.5946 $ 89.3336 Net investment income (loss) (1.3314 ) (0.9149 ) (0.4968 ) (0.4096 ) (0.5741 ) (0.2256 ) (0.8243 ) Net realized and unrealized gain (loss)# 56.9678 20.1432 7.2680 4.1246 7.6533 4.1716 (0.5704 ) Change in net asset value from operations 55.6364 19.2283 6.7712 3.7150 7.0792 3.9460 (1.3947 ) Net asset value, at December 31, 2015 $ 139.5941 $ 115.8799 $ 64.5783 $ 43.7767 $ 58.4582 $ 25.5406 $ 87.9389 Market value per share, at December 31, 2014† $ 82.03 $ 100.22 $ 59.70 $ 40.03 $ 51.37 $ 21.61 $ 89.30 Market value per share, at December 31, 2015† $ 139.66 $ 115.83 $ 64.55 $ 43.74 $ 58.15 $ 25.53 $ 87.89 Total Return, at net asset value 66.3 % 19.9 % 11.7 % 9.3 % 13.8 % 18.3 % (1.6 )% Total Return, at market value 70.3 % 15.6 % 8.1 % 9.3 % 13.2 % 18.1 % (1.6 )% Ratios to Average Net Assets Expense ratio (1.55 )% (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 )% (0.95 )% Net investment income (loss) (1.50 )% (0.91 )% (0.91 )% (0.95 )% (1.00 )% (0.90 )% (0.92 )% * See Note 1 of these Notes to 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 Ultra Ultra Ultra Gold Ultra Silver Ultra Ultra Net asset value, at December 31, 2014 $ 52.1342 $ 50.7400 $ 61.6491 $ 40.0011 $ 39.3657 $ 19.8744 $ 56.4747 Net investment income (loss) (0.3491 ) (0.2811 ) (0.4982 ) (0.3292 ) (0.3258 ) (0.1505 ) (0.4787 ) Net realized and unrealized gain (loss)# (23.3572 ) (37.8815 ) (42.5811 ) (9.9424 ) (11.9761 ) (4.2132 ) (1.2433 ) Change in net asset value from operations (23.7063 ) (38.1626 ) (43.0793 ) (10.2716 ) (12.3019 ) (4.3637 ) (1.7220 ) Net asset value, at December 31, 2015 $ 28.4279 $ 12.5774 $ 18.5698 $ 29.7295 $ 27.0638 $ 15.5107 $ 54.7527 Market value per share, at December 31, 2014† $ 51.44 $ 51.85 $ 63.12 $ 38.41 $ 38.05 $ 19.80 $ 56.48 Market value per share, at December 31, 2015† $ 28.07 $ 12.54 $ 18.48 $ 29.73 $ 27.08 $ 15.51 $ 54.70 Total Return, at net asset value (45.5 )% (75.2 )% (69.9 )% (25.7 )% (31.3 )% (22.0 )% (3.0 )% Total Return, at market value (45.4 )% (75.8 )% (70.7 )% (22.6 )% (28.8 )% (21.7 )% (3.2 )% Ratios to Average Net Assets Expense ratio (0.95 )% (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 )% (0.95 )% Net investment income (loss) (0.93 )% (0.98 )% (1.26 )% (0.90 )% (0.89 )% (0.93 )% (0.88 )% * See Note 1 of these Notes to 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 Managed VIX Short- VIX Mid- Short VIX Ultra VIX UltraShort UltraShort Net asset value, beginning of period $ 20.0000 $ 28.5387 $ 77.1837 $ 67.4993 $ 335.4203 $ 63.2936 $ 31.7301 Net investment income (loss) (0.0417 ) (0.2047 ) (0.5666 ) (1.0247 ) (2.9055 ) (0.5679 ) (0.2773 ) Net realized and unrealized gain (loss)# 1.1771 (7.4019 ) (13.0151 ) (5.0742 ) (207.0557 ) 25.0238 46.5262 Change in net asset value from operations 1.1354 (7.6066 ) (13.5817 ) (6.0989 ) (209.9612 ) 24.4559 46.2489 Net asset value, at December 31, 2014 $ 21.1354 $ 20.9321 $ 63.6020 $ 61.4004 $ 125.4591 $ 87.7495 $ 77.9790 Market value per share, at December 31, 2013† $ — $ 28.53 $ 77.16 $ 67.47 $ 335.60 $ 58.41 $ 31.58 Market value per share, at December 31, 2014† $ 21.28 $ 20.99 $ 63.89 $ 61.16 $ 125.75 $ 87.44 $ 76.52 Total Return, at net asset value 5.7 %^ (26.7 )% (17.6 )% (9.0 )% (62.6 )% 38.6 % 145.8 % Total Return, at market value 6.4 %^ (26.4 )% (17.2 )% (9.4 )% (62.5 )% 49.7 % 142.3 % Ratios to Average Net Assets Expense ratio (0.82 )%** (0.92 )% (0.87 )% (1.49 )% (1.80 )% (0.95 )% (0.98 )% Expense ratio, excluding brokerage commissions (0.75 )%** (0.85 )% (0.85 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% Net investment income (loss) (0.82 )%** (0.88 )% (0.84 )% (1.46 )% (1.78 )% (0.92 )% (0.94 )% * See Note 1 of these Notes to Financial Statements. + From commencement of operations, October 1, 2014, through December 31, 2014. # 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. ^ Percentages are not annualized for the period ended December 31, 2014. The return for a share outstanding for 2014 is calculated based on the initial offering price upon commencement of investment operations of $20.0000 for ProShares Managed Futures Strategy. ** Percentage are annualized. For the Year Ended December 31, 2014 Per Share Operating Performance UltraShort UltraShort UltraShort Short UltraShort UltraShort UltraShort Net asset value, at December 31, 2013 $ 69.9635 $ 103.5180 $ 44.8910 $ 35.5867 $ 46.6384 $ 17.0613 $ 70.8640 Net investment income (loss) (0.4961 ) (0.8233 ) (0.3937 ) (0.3428 ) (0.4272 ) (0.1642 ) (0.6412 ) Net realized and unrealized gain (loss)# 14.4903 (6.0431 ) 13.3098 4.8178 5.1678 4.6975 19.1108 Change in net asset value from operations 13.9942 (6.8664 ) 12.9161 4.4750 4.7406 4.5333 18.4696 Net asset value, at December 31, 2014 $ 83.9577 $ 96.6516 $ 57.8071 $ 40.0617 $ 51.3790 $ 21.5946 $ 89.3336 Market value per share, at December 31, 2013† $ 69.36 $ 103.53 $ 45.10 $ 35.66 $ 46.66 $ 17.06 $ 70.91 Market value per share, at December 31, 2014† $ 82.03 $ 100.22 $ 59.70 $ 40.03 $ 51.37 $ 21.61 $ 89.30 Total Return, at net asset value 20.0 % (6.6 )% 28.8 % 12.6 % 10.2 % 26.6 % 26.1 % Total Return, at market value 18.3 % (3.2 )% 32.4 % 12.3 % 10.1 % 26.7 % 25.9 % Ratios to Average Net Assets Expense ratio (1.18 )% (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 )% (0.95 )% Net investment income (loss) (1.14 )% (0.91 )% (0.90 )% (0.93 )% (0.97 )% (0.90 )% (0.90 )% * See Note 1 of these Notes to 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 Ultra Ultra Ultra Ultra Gold Ultra Silver Ultra Ultra Yen* Net asset value, at December 31, 2013 $ 77.7259 $ 160.4495 $ 155.3534 $ 41.2553 $ 63.3305 $ 26.0346 $ 74.5261 Net investment income (loss) (0.7047 ) (1.0928 ) (1.5167 ) (0.4078 ) (0.5348 ) (0.2185 ) (0.6693 ) Net realized and unrealized gain (loss)# (24.8870 ) (108.6167 ) (92.1876 ) (0.8464 ) (23.4300 ) (5.9417 ) (17.3821 ) Change in net asset value from operations (25.5917 ) (109.7095 ) (93.7043 ) (1.2542 ) (23.9648 ) (6.1602 ) (18.0514 ) Net asset value, at December 31, 2014 $ 52.1342 $ 50.7400 $ 61.6491 $ 40.0011 $ 39.3657 $ 19.8744 $ 56.4747 Market value per share, at December 31, 2013† $ 76.52 $ 161.10 $ 157.12 $ 41.26 $ 63.04 $ 25.98 $ 74.44 Market value per share, at December 31, 2014† $ 51.44 $ 51.85 $ 63.12 $ 38.41 $ 38.05 $ 19.80 $ 56.48 Total Return, at net asset value (32.9 )% (68.4 )% (60.3 )% (3.0 )% (37.8 )% (23.7 )% (24.2 )% Total Return, at market value (32.8 )% (67.8 )% (59.8 )% (6.9 )% (39.6 )% (23.8 )% (24.1 )% Ratios to Average Net Assets Expense ratio (0.95 )% (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 )% (0.95 )% Net investment income (loss) (0.91 )% (0.95 )% (1.10 )% (0.91 )% (0.91 )% (0.91 )% (0.90 )% * See Note 1 of these Notes to 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, 2013 For the Year Ended December 31, 2013 Per Share Operating Performance VIX Short- VIX Mid- Short VIX Ultra VIX UltraShort UltraShort UltraShort Net asset value, at December 31, 2012 $ 83.9374 $ 138.8013 $ 33.0649 $ 4,026.4321 $ 54.1021 $ 40.3079 $ 102.1402 Net investment income (loss) (0.3518 ) (0.7892 ) (0.7398 ) (15.0047 ) (0.5355 ) (0.3033 ) (0.9217 ) Net realized and unrealized gain (loss)# (55.0469 ) (60.8284 ) 35.1742 (3,676.0071 ) 9.7270 (8.2745 ) (31.2550 ) Change in net asset value from operations (55.3987 ) (61.6176 ) 34.4344 (3,691.0118 ) 9.1915 (8.5778 ) (32.1767 ) Net asset value, at December 31, 2013 $ 28.5387 $ 77.1837 $ 67.4993 $ 335.4203 $ 63.2936 $ 31.7301 $ 69.9635 Market value per share, at December 31, 2012† $ 85.05 $ 136.88 $ 32.73 $ 4,180.00 $ 51.64 $ 40.44 $ 101.64 Market value per share, at December 31, 2013† $ 28.53 $ 77.16 $ 67.47 $ 335.60 $ 58.41 $ 31.58 $ 69.36 Total Return, at net asset value (66.0 )% (44.4 )% 104.1 % (91.7 )% 17.0 % (21.3 )% (31.5 )% Total Return, at market value (66.5 )% (43.6 )% 106.2 % (92.0 )% 13.1 % (21.9 )% (31.8 )% Ratios to Average Net Assets Expense ratio (0.85 )% (0.85 )% (1.53 )% (1.82 )% (0.95 )% (0.98 )% (1.20 )% Expense ratio, excluding brokerage commissions (0.85 )% (0.85 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% Net investment income (loss) (0.81 )% (0.81 )% (1.49 )% (1.80 )% (0.90 )% (0.94 )% (1.15 )% * See Note 1 of these Notes to 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, 2013 Per Share Operating Performance UltraShort UltraShort Short Euro UltraShort UltraShort UltraShort Ultra Net asset value, at December 31, 2012 $ 63.8688 $ 25.6975 $ 37.6285 $ 37.8081 $ 19.0172 $ 50.7577 $ 97.5491 Net investment income (loss) (0.7561 ) (0.3112 ) (0.3430 ) (0.4325 ) (0.1677 ) (0.5662 ) (0.7780 ) Net realized and unrealized gain (loss)# 40.4053 19.5047 (1.6988 ) 9.2628 (1.7882 ) 20.6725 (19.0452 ) Change in net asset value from operations 39.6492 19.1935 (2.0418 ) 8.8303 (1.9559 ) 20.1063 (19.8232 ) Net asset value, at December 31, 2013 $ 103.5180 $ 44.8910 $ 35.5867 $ 46.6384 $ 17.0613 $ 70.8640 $ 77.7259 Market value per share, at December 31, 2012† $ 62.60 $ 25.04 $ 37.64 $ 37.74 $ 19.01 $ 50.77 $ 95.72 Market value per share, at December 31, 2013† $ 103.53 $ 45.10 $ 35.66 $ 46.66 $ 17.06 $ 70.91 $ 76.52 Total Return, at net asset value 62.1 % 74.7 % (5.4 )% 23.4 % (10.3 )% 39.6 % (20.3 )% Total Return, at market value 65.4 % 80.1 % (5.3 )% 23.6 % (10.3 )% 39.7 % (20.1 )% Ratios to Average Net Assets Expense ratio (0.95 )% (0.95 )% (0.96 )% (1.02 )% (0.95 )% (0.95 )% (0.95 )% Expense ratio, excluding brokerage commissions (0.95 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% Net investment income (loss) (0.90 )% (0.89 )% (0.93 )% (0.99 )% (0.90 )% (0.91 )% (0.90 )% * See Note 1 of these Notes to 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, 2013 Per Share Operating Performance Ultra Ultra Ultra Gold Ultra Silver* Ultra Euro Ultra Yen* Net asset value, at December 31, 2012 $ 146.9706 $ 156.1962 $ 83.7634 $ 171.8906 $ 24.3499 $ 112.7345 Net investment income (loss) (1.4243 ) (1.6214 ) (0.5404 ) (0.8789 ) (0.2200 ) (0.7984 ) Net realized and unrealized gain (loss)# 14.9032 0.7786 (41.9677 ) (107.6812 ) 1.9047 (37.4100 ) Change in net asset value from operations 13.4789 (0.8428 ) (42.5081 ) (108.5601 ) 1.6847 (38.2084 ) Net asset value, at December 31, 2013 $ 160.4495 $ 155.3534 $ 41.2553 $ 63.3305 $ 26.0346 $ 74.5261 Market value per share, at December 31, 2012† $ 146.60 $ 156.96 $ 85.34 $ 176.40 $ 24.32 $ 113.12 Market value per share, at December 31, 2013† $ 161.10 $ 157.12 $ 41.26 $ 63.04 $ 25.98 $ 74.44 Total Return, at net asset value 9.2 % (0.5 )% (50.7 )% (63.2 )% 6.9 % (33.9 )% Total Return, at market value 9.9 % 0.1 % (51.7 )% (64.3 )% 6.8 % (34.2 )% Ratios to Average Net Assets Expense ratio (0.97 )% (1.15 )% (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) (0.92 )% (1.10 )% (0.89 )% (0.89 )% (0.90 )% (0.90 )% * See Note 1 of these Notes to 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, 2015
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), two times the inverse (-2x), or two times (2x) of the return of the Geared Fund’s benchmark for the period. A Fund will lose money if its benchmark performance is flat over time, and it is possible for a Geared Fund to lose money over time even if the performance of its benchmark increases (or decreases in the case of Short and UltraShort Funds), as a result of daily rebalancing, the benchmark’s volatility and compounding. Longer holding periods, higher benchmark volatility, inverse exposure and greater leverage each affect the impact of compounding on a Fund’s returns. Daily compounding of a Geared Fund’s investment returns can dramatically and adversely affect its longer-term performance during periods of high volatility. Volatility may be at least as important to a Geared Fund’s return for a period as the return of the Fund’s underlying benchmark. The Matching VIX Funds and the Managed Futures Fund seek to achieve their stated investment objective both over a single day and over time. 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) or two times the inverse (-2x) of the return that would be expected of a fund with an objective of matching the same benchmark. The Geared Funds are not appropriate for all investors and present different risks than other funds. The Leveraged Funds use leverage and are riskier than similarly benchmarked exchange-traded funds that do not use leverage. An investor should only consider an investment in a Geared Fund if he or she understands the consequences of seeking daily leveraged, daily inverse or daily inverse leveraged investment results. Daily objective geared funds, if used properly and in conjunction with the investor’s view on the future direction and volatility of the markets, can be useful tools for investors who want to manage their exposure to various markets and market segments and who are willing to monitor and/or periodically rebalance their portfolios. Shareholders who invest in the Funds should actively manage and monitor their investments, as frequently as daily. 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 spreads on such Financial Instruments; (4) fees, expenses, transaction costs, financing costs associated with the use of Financial Instruments and commission costs; (5) holding instruments traded in a market that has become illiquid or disrupted; (6) a Fund’s Share prices being rounded to the nearest cent and/or valuation methodology; (7) changes to a benchmark index that are not disseminated in advance; (8) the need to conform a Fund’s portfolio holdings to comply with investment restrictions or policies or regulatory or tax law requirements; (9) early and unanticipated closings of the markets on which the holdings of a Fund trade, resulting in the inability of the Fund to execute intended portfolio transactions; (10) accounting standards; and (11) differences caused by a Fund obtaining exposure to only a representative sample of the components of a benchmark, overweighting or underweighting certain components of a benchmark or obtaining exposure to assets that are not included in a benchmark. 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., 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 and settlement, and segregation and minimum capital requirements applicable to intermediaries. Transactions entered into directly between two counterparties generally do not benefit from such protections. This exposes the Funds to the risk that a counterparty will not settle a transaction in accordance with its terms and conditions because of a dispute over the terms of the contract (whether or not bona fide) or because of a credit or liquidity problem, thus causing the Funds to suffer a loss. 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 a two times (2x) multiplier, a single-day movement in the relevant benchmark approaching 50% at any point in the day (for an UltraShort Fund or an UltraShort Fund) could result in the total loss or almost total loss of an investor’s investment if that movement is contrary to the investment objective of the Fund in which an investor has invested, even if such Fund’s benchmark subsequently moves in an opposite direction, eliminating all or a portion of the movement. This would be the case with downward single-day or intraday movements in the underlying benchmark of an Ultra Fund or upward single-day or intraday movements in the benchmark of an UltraShort Fund, even if the underlying benchmark maintains a level greater than zero at all times. 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 2014 may specify a January 2015 expiration. As that contract nears expiration, it may be replaced by selling the January 2015 contract and purchasing the contract expiring in March 2015. 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 2015 contract would take place at a price that is higher than the price at which the March 2015 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, the Managed Futures 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, the Managed Futures Fund 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. Shareholder Concentration As of December 31, 2015, ProShares Morningstar Alternatives Solution ETF, an ETF affiliated with the Funds, owned 51.4% of the outstanding shares of the Managed Futures Fund. Subscription and redemption activity by concentrated shareholders may have a significant effect on the operations of the Fund.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2015
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 February 18, 2016, the Trust announced that it plans to close and liquidate ProShares Managed Futures Strategy (ticker symbol: FUTS). The fund trades on NYSE Arca. After the close of business on March 18, 2016, the fund will no longer accept creation orders. Trading in the fund on NYSE Arca will be halted prior to market open on March 21, 2016. Fund holdings will be liquidated by March 21, 2016 or shortly thereafter. Beginning on March 21, 2016, the fund will not be traded on NYSE Arca and there will be no secondary market for the fund’s shares. Once the fund is in the process of liquidating its portfolio holdings, it will not be managed in accordance with its investment objective. Proceeds of the liquidation are scheduled to be distributed to shareholders on or about March 30, 2016. Any shareholders remaining in the fund on the distribution date will automatically have their shares redeemed for cash at the fund’s net asset value per share as of the liquidation date. The cash distribution will be deposited into their brokerage accounts. These cash distributions are taxable events and shareholders should consult their tax advisors about potential tax consequences.

Significant Accounting Polici17

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
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 and disclosures in these financial statements. 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, 2015 and 2014, and represents non-segregated cash with the custodian and does not include short-term investments.
Final Net Asset Value for Fiscal Period	Final Net Asset Value for Fiscal Period The cut-off times and the times of the calculation of the Funds’ final net asset value for creation and redemption of fund Shares for the year ended December 31, 2015 were as follows. All times are Eastern Standard Time: Create/Redeem Cut-off* NAV Calculation NAV UltraShort Silver, Ultra Silver 6:30 a.m. 7:00 a.m. December 31 UltraShort Gold, Ultra Gold 9:30 a.m. 10:00 a.m. December 31 UltraShort Bloomberg Crude Oil, Ultra Bloomberg Crude Oil 2:00 p.m. 2:30 p.m. December 31 UltraShort Bloomberg Natural Gas, Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 31 UltraShort Bloomberg Commodity, Ultra Bloomberg Commodity 10:45 a.m. 2:30 p.m. December 31 Managed Futures Strategy 10:45 a.m. 3:00 p.m. December 31 UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 31 Short Euro, UltraShort Euro, Ultra Euro 3:00 p.m. 4:00 p.m. December 31 UltraShort Yen, Ultra Yen 3:00 p.m. 4:00 p.m. December 31 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 31 VIX Mid-Term Futures ETF 2:00 p.m. 4:15 p.m. December 31 * 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, 2015. 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, 2015.
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. 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, 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 Managed Futures Strategy $ — $ 57,179 $ — $ — $ — $ 57,179 VIX Short-Term Futures ETF 96,073,659 (1,078,625 ) — — — 94,995,034 VIX Mid-Term Futures ETF 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 Commodity 7,518,119 — — — 171,324 7,689,443 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 Commodity 7,084,065 — — — (183,916 ) 6,900,149 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 $ 3,313,591,600 $ 9,472,117 $ (18,224,475 ) $ (41,739,557 ) $ (65,776,525 ) $ 3,197,323,160 * 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, 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. The following table summarizes the valuation of investments at December 31, 2014 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total Managed Futures Strategy $ — $ 104,327 $ — $ — $ — $ 104,327 VIX Short-Term Futures ETF 82,088,299 6,264,620 — — — 88,352,919 VIX Mid-Term Futures ETF 24,105,906 260,665 — — — 24,366,571 Short VIX Short-Term Futures ETF 446,975,220 (16,352,149 ) — — — 430,623,071 Ultra VIX Short-Term Futures ETF 182,639,188 39,585,253 — — — 222,224,441 UltraShort Bloomberg Commodity 4,233,548 — — — 567,259 4,800,807 UltraShort Bloomberg Crude Oil 131,594,608 15,806,603 — — 27,018,077 174,419,288 UltraShort Bloomberg Natural Gas 8,672,710 3,941,465 — — — 12,614,175 UltraShort Gold 84,040,107 (4,520 ) (2,282,778 ) — — 81,752,809 UltraShort Silver 52,226,692 1,560 594,953 — — 52,823,205 Short Euro 12,086,577 385,331 — — — 12,471,908 UltraShort Australian Dollar 20,267,679 743,481 — — — 21,011,160 UltraShort Euro 487,111,117 — — 16,762,994 — 503,874,111 UltraShort Yen 532,957,746 — — (1,578,775 ) — 531,378,971 Ultra Bloomberg Commodity 2,754,900 — — — (331,338 ) 2,423,562 Ultra Bloomberg Crude Oil 467,200,736 (46,474,787 ) — — (76,181,097 ) 344,544,852 Ultra Bloomberg Natural Gas 53,410,227 (34,889,283 ) — — — 18,520,944 Ultra Gold 101,927,857 4,580 2,051,154 — — 103,983,591 Ultra Silver 305,474,211 (1,560 ) (12,395,120 ) — — 293,077,531 Ultra Euro 2,415,698 — — (103,371 ) — 2,312,327 Ultra Yen 1,287,869 — — (15,245 ) — 1,272,624 Total Trust** $ 3,003,470,895 $ (30,624,414 ) $ (12,031,791 ) $ 15,065,603 $ (48,927,099 ) $ 2,926,953,194 * 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. ** Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015. At December 31, 2014, 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, 2014, 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 fees, pit brokerage fees and other transaction related fees and expenses charged in connection with trading activities for each Fund’s investment in U.S. Commodity Futures Trading Commission (“CFTC”) regulated investments. The effects of trading spreads, financing costs/fees associated with Financial Instruments, and costs relating to the purchase of U.S. Treasury securities or similar high credit quality short-term fixed-income or similar securities would also be borne by the Funds. Brokerage commissions on futures contracts are recognized on a half-turn basis (e.g., the first half is recognized when the contract is purchased (opened) and the second half is recognized when the transaction is closed). Through July 30, 2014, the Sponsor paid brokerage commissions on VIX futures contracts for the Matching VIX Funds. On July 31, 2014, the Sponsor began paying, and is currently paying, brokerage commissions on VIX futures contracts for the Matching VIX Funds that exceed variable create/redeem fees collected by more than 0.02% of the Matching VIX Fund’s average net assets annually.
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.

Organization (Tables)

Organization (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2013, 2014 and 2015. 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 VIX Short-Term Futures ETF June 10, 2013 1-for-5 reverse Share split June 10, 2013 ProShares VIX Mid-Term Futures ETF November 6, 2014 1-for-4 reverse Share split November 6, 2014 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 June 10, 2013 1-for-10 reverse Share June 10, 2013 ProShares Ultra VIX Short-Term Futures ETF January 21, 2014 1-for-4 reverse Share split January 24, 2014 ProShares Ultra VIX Short-Term Futures ETF May 20, 2015 1-for-5 reverse Share split May 20, 2015 ProShares UltraShort Bloomberg Natural Gas June 10, 2013 1-for-4 reverse Share split June 10, 2013 ProShares UltraShort Silver November 13, 2015 2-for-1 Share split November 13, 2015 ProShares Ultra Silver January 21, 2014 1-for-4 reverse Share split January 24, 2014 ProShares Ultra Bloomberg Commodity May 20, 2015 1-for-4 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 reverse Share split May 20, 2015 ProShares Ultra Yen May 20, 2015 1-for-4 reverse Share split May 20, 2015

Significant Accounting Polici19

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
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 times and the times of the calculation of the Funds’ final net asset value for creation and redemption of fund Shares for the year ended December 31, 2015 were as follows. All times are Eastern Standard Time: Create/Redeem Cut-off* NAV Calculation NAV UltraShort Silver, Ultra Silver 6:30 a.m. 7:00 a.m. December 31 UltraShort Gold, Ultra Gold 9:30 a.m. 10:00 a.m. December 31 UltraShort Bloomberg Crude Oil, Ultra Bloomberg Crude Oil 2:00 p.m. 2:30 p.m. December 31 UltraShort Bloomberg Natural Gas, Ultra Bloomberg Natural Gas 2:00 p.m. 2:30 p.m. December 31 UltraShort Bloomberg Commodity, Ultra Bloomberg Commodity 10:45 a.m. 2:30 p.m. December 31 Managed Futures Strategy 10:45 a.m. 3:00 p.m. December 31 UltraShort Australian Dollar 3:00 p.m. 4:00 p.m. December 31 Short Euro, UltraShort Euro, Ultra Euro 3:00 p.m. 4:00 p.m. December 31 UltraShort Yen, Ultra Yen 3:00 p.m. 4:00 p.m. December 31 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 31 VIX Mid-Term Futures ETF 2:00 p.m. 4:15 p.m. December 31 * 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, 2015.
Valuation of Investments using Fair Value Hierarchy	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 Managed Futures Strategy $ — $ 57,179 $ — $ — $ — $ 57,179 VIX Short-Term Futures ETF 96,073,659 (1,078,625 ) — — — 94,995,034 VIX Mid-Term Futures ETF 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 Commodity 7,518,119 — — — 171,324 7,689,443 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 Commodity 7,084,065 — — — (183,916 ) 6,900,149 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 $ 3,313,591,600 $ 9,472,117 $ (18,224,475 ) $ (41,739,557 ) $ (65,776,525 ) $ 3,197,323,160 * 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. The following table summarizes the valuation of investments at December 31, 2014 using the fair value hierarchy: Level I - Quoted Prices Level II - Other Significant Observable Inputs Short-Term U.S. Futures Forward Foreign Swap Total Managed Futures Strategy $ — $ 104,327 $ — $ — $ — $ 104,327 VIX Short-Term Futures ETF 82,088,299 6,264,620 — — — 88,352,919 VIX Mid-Term Futures ETF 24,105,906 260,665 — — — 24,366,571 Short VIX Short-Term Futures ETF 446,975,220 (16,352,149 ) — — — 430,623,071 Ultra VIX Short-Term Futures ETF 182,639,188 39,585,253 — — — 222,224,441 UltraShort Bloomberg Commodity 4,233,548 — — — 567,259 4,800,807 UltraShort Bloomberg Crude Oil 131,594,608 15,806,603 — — 27,018,077 174,419,288 UltraShort Bloomberg Natural Gas 8,672,710 3,941,465 — — — 12,614,175 UltraShort Gold 84,040,107 (4,520 ) (2,282,778 ) — — 81,752,809 UltraShort Silver 52,226,692 1,560 594,953 — — 52,823,205 Short Euro 12,086,577 385,331 — — — 12,471,908 UltraShort Australian Dollar 20,267,679 743,481 — — — 21,011,160 UltraShort Euro 487,111,117 — — 16,762,994 — 503,874,111 UltraShort Yen 532,957,746 — — (1,578,775 ) — 531,378,971 Ultra Bloomberg Commodity 2,754,900 — — — (331,338 ) 2,423,562 Ultra Bloomberg Crude Oil 467,200,736 (46,474,787 ) — — (76,181,097 ) 344,544,852 Ultra Bloomberg Natural Gas 53,410,227 (34,889,283 ) — — — 18,520,944 Ultra Gold 101,927,857 4,580 2,051,154 — — 103,983,591 Ultra Silver 305,474,211 (1,560 ) (12,395,120 ) — — 293,077,531 Ultra Euro 2,415,698 — — (103,371 ) — 2,312,327 Ultra Yen 1,287,869 — — (15,245 ) — 1,272,624 Total Trust** $ 3,003,470,895 $ (30,624,414 ) $ (12,031,791 ) $ 15,065,603 $ (48,927,099 ) $ 2,926,953,194 * 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. ** Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015.

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2015
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, 2015 Asset Derivatives Liability Derivatives Derivatives not Statements of Financial Condition Location Fund Unrealized Statements of Financial Condition Location Fund Unrealized Managed Futures Contracts Receivables on open futures contracts ProShares Managed Futures Strategy $ 100,136 * Payable on open futures contracts ProShares Managed Futures Strategy $ 42,957 * VIX Futures Contracts Receivables on open futures contracts ProShares VIX Mid-Term Futures ETF 10,005 * Payable on open futures contracts ProShares VIX Short-Term Futures ETF 1,078,625 * ProShares Short VIX Short-Term ETF 10,805,245 * ProShares VIX Mid-Term Futures ETF 354,365 * ProShares Ultra VIX Short-Term Futures ETF 11,894,466 * ProShares Short VIX Short-Term ETF 58,830 * Commodities Contracts Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Commodity 224,491 Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Commodity 53,167 ProShares UltraShort Bloomberg Crude Oil 8,877,169 * ProShares UltraShort Bloomberg Natural Gas 2,471,164 * ProShares Ultra Bloomberg Commodity 32,372 ProShares Ultra Bloomberg Commodity 216,288 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 $ 46,904,273 * Total Trust $ 163,172,713 * * 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, 2014 Asset Derivatives Liability Derivatives Derivatives not Statements of Financial Condition Location Fund Unrealized Statements of Financial Condition Location Fund Unrealized Managed Futures Contracts Receivables on open futures contracts ProShares Managed Futures Strategy $ 122,831 * Payable on open futures contracts ProShares Managed Futures Strategy $ 18,504 * VIX Futures Contracts Receivables on open futures contracts ProShares VIX Short-Term Futures ETF 6,264,620 * Payable on open futures contracts ProShares VIX Mid-Term Futures ETF 222,845 * ProShares VIX Mid-Term Futures ETF 483,510 * ProShares Short VIX Short-Term ETF 16,352,149 * ProShares Ultra VIX Short-Term Futures ETF 39,585,253 * Commodities Contracts Receivables on open futures contracts, unrealized appreciation on swap and/or forward agreements ProShares UltraShort Bloomberg Commodity 567,259 Payable on open futures contracts, unrealized depreciation on swap and/or forward agreements ProShares UltraShort Gold 2,287,298 * ProShares UltraShort Bloomberg Crude Oil 42,824,680 * ProShares UltraShort Silver 204,570 ProShares UltraShort Bloomberg Natural Gas 3,941,465 * ProShares Ultra Bloomberg Commodity 331,338 ProShares UltraShort Silver 801,083 * ProShares Ultra Bloomberg Crude Oil 122,655,884 * ProShares Ultra Gold 2,055,734 * ProShares Ultra Bloomberg Natural Gas 34,889,283 * ProShares Ultra Silver 12,396,680 * Foreign Exchange Contracts Unrealized appreciation on foreign currency forward contracts and receivables on open futures contracts ProShares Short Euro 385,331 * Unrealized depreciation on foreign currency forward contracts and payable on open futures contracts ProShares UltraShort Euro 2,256,771 ProShares UltraShort Australian Dollar 743,481 * ProShares UltraShort Yen 2,149,924 ProShares UltraShort Euro 19,019,765 ProShares Ultra Euro 106,292 ProShares UltraShort Yen 571,149 ProShares Ultra Yen 15,649 ProShares Ultra Euro 2,921 ProShares Ultra Yen 404 Total Trust** $ 117,369,486 * Total Trust $ 193,887,187 * * 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. ** Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015.
Effect of Derivative Instruments on Statements of Operations	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 Fund Realized Gain Change in Unrealized Recognized in Managed Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares Managed Futures Strategy $ (278,197 ) $ (47,148 ) VIX Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term Futures ETF (19,408,543 ) (7,343,245 ) ProShares VIX Mid-Term Futures ETF (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 Commodity 3,701,239 (395,935 ) 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 Commodity (2,951,820 ) 147,422 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 contracts or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts or forward agreements 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 $ (1,164,277,383 ) $ (39,750,739 ) The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2014 Derivatives not accounted for as Location of Gain or (Loss) on Derivatives Fund Realized Gain Change in Unrealized Recognized in Managed Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares Managed Futures Strategy $ 109,006 $ 104,327 VIX Futures Contracts Net realized gain (loss) on futures contracts / changes in unrealized appreciation/ depreciation on futures contracts ProShares VIX Short-Term Futures ETF (694,347 ) 22,917,306 ProShares VIX Mid-Term Futures ETF (14,378,810 ) 5,157,354 ProShares Short VIX Short-Term Futures ETF 76,925,998 (24,469,104 ) ProShares Ultra VIX Short-Term Futures ETF (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 Commodity 906,309 594,924 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 Commodity (1,065,622 ) (346,416 ) 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 contracts or forward agreements/changes in unrealized appreciation/ depreciation on futures contracts or forward agreements 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* $ (160,255,767 ) $ (46,030,931 ) * Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015. The Effect of Derivative Instruments on the Statements of Operations For the year ended December 31, 2013 Derivatives not accounted for as Location of Gain or (Loss) on Derivatives Fund Realized Gain Change in Unrealized Recognized in VIX Futures Contracts Net realized gain (loss) on futures contracts and/or swap agreements /changes in unrealized appreciation/ depreciation on futures contracts and/or swap agreements ProShares VIX Short-Term Futures ETF $ (144,618,136 ) $ (16,431,267 ) ProShares VIX Mid-Term Futures ETF (28,219,863 ) (3,426,279 ) ProShares Short VIX Short-Term Futures ETF 87,175,105 9,504,130 ProShares Ultra VIX Short-Term Futures ETF (405,816,676 ) (26,368,324 ) 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 Commodity 760,002 (176,167 ) ProShares UltraShort Bloomberg Crude Oil (12,304,999 ) 6,071,108 ProShares UltraShort Bloomberg Natural Gas (2,585,514 ) 633,165 ProShares UltraShort Gold 61,124,409 1,902,477 ProShares UltraShort Silver 113,456,404 (21,561,362 ) ProShares Ultra Bloomberg Commodity (1,254,251 ) 321,346 ProShares Ultra Bloomberg Crude Oil 120,745,948 (52,709,476 ) ProShares Ultra Bloomberg Natural Gas 41,418,165 160,411 ProShares Ultra Gold (165,632,786 ) 8,839,764 ProShares Ultra Silver (701,532,729 ) 143,273,646 Foreign Exchange 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 Short Euro (381,987 ) 21,825 ProShares UltraShort Australian Dollar 2,720,079 832,015 ProShares UltraShort Euro (48,063,036 ) (600,935 ) ProShares UltraShort Yen 164,019,598 (8,727,491 ) ProShares Ultra Euro 210,150 13,803 ProShares Ultra Yen (1,879,169 ) 334,987 Total Trust* $ (920,659,286 ) $ 41,907,376 * Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015.
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, 2015 and 2014: Fair Values of Derivative Instruments as of December 31, 2015 Assets Liabilities Gross Gross Net Amounts of Gross Gross Net Amounts of ProShares UltraShort Bloomberg Commodity Swap agreements $ 224,491 $ — $ 224,491 $ 53,167 $ — $ 53,167 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 Commodity Swap agreements 32,372 — 32,372 216,288 — 216,288 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 Fair Values of Derivative Instruments as of December 31, 2014 Assets Liabilities Gross Gross Net Amounts of Gross Gross Net Amounts of ProShares UltraShort Bloomberg Commodity Swap agreements $ 567,259 $ — $ 567,259 $ — $ — $ — ProShares UltraShort Bloomberg Crude Oil Swap agreements 27,018,077 — 27,018,077 — — — ProShares UltraShort Gold Forward agreements — — — 2,282,778 — 2,282,778 ProShares UltraShort Silver Forward agreements 799,523 — 799,523 204,570 — 204,570 ProShares UltraShort Euro Foreign currency forward contracts 19,019,765 — 19,019,765 2,256,771 — 2,256,771 ProShares UltraShort Yen Foreign currency forward contracts 571,149 — 571,149 2,149,924 — 2,149,924 ProShares Ultra Bloomberg Commodity Swap agreements — — — 331,338 — 331,338 ProShares Ultra Bloomberg Crude Oil Swap agreements — — — 76,181,097 — 76,181,097 ProShares Ultra Gold Forward agreements 2,051,154 — 2,051,154 — — — ProShares Ultra Silver Forward agreements — — — 12,395,120 — 12,395,120 ProShares Ultra Euro Foreign currency forward contracts 2,921 — 2,921 106,292 — 106,292 ProShares Ultra Yen Foreign currency forward contracts 404 — 404 15,649 — 15,649
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, 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 due to timing differences related to market movements or due to minimum thresholds for collateral movement, as further described above under the caption “Accounting for Derivative Instruments”. Gross Amounts Not Offset in the Statement of Financial Condition as of December 31, 2015 Amounts of Financial Cash Collateral Net Amount ProShares UltraShort Bloomberg Commodity Citibank N.A. $ (53,167 ) $ 53,167 $ — $ — Deutsche Bank AG 84,161 — (50,000 ) 34,161 Goldman Sachs International 36,878 (28,466 ) — 8,412 UBS AG 103,452 (103,452 ) — — 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 Commodity Citibank N.A. 32,372 — — 32,372 Deutsche Bank AG (82,976 ) 82,976 — — Goldman Sachs International (60,830 ) 60,830 — — UBS AG (72,482 ) 72,482 — — 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 Asset (Liability) amounts shown in the table below represent amounts owed to (by) the Funds for the derivative-related investments at December 31, 2014. 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 due to timing differences related to market movements or due to minimum thresholds for collateral movement, as further described above under the caption “Accounting for Derivative Instruments”. Gross Amounts Not Offset in the Statements of Financial Condition as of December 31, 2014 Amounts of Financial Cash Collateral Net Amount ProShares UltraShort Bloomberg Commodity Deutsche Bank AG $ 243,474 $ — $ — $ 243,474 Goldman Sachs International 240,271 — — 240,271 UBS AG 83,514 — — 83,514 ProShares UltraShort Bloomberg Crude Oil Deutsche Bank AG 7,669,493 — (6,800,000 ) 869,493 Goldman Sachs International 8,362,336 (7,598,657 ) — 763,679 Societe Generale S.A. 2,132,657 (2,132,657 ) — — UBS AG 8,853,591 (8,281,350 ) — 572,241 ProShares UltraShort Gold Deutsche Bank AG (1,422,997 ) 1,422,997 — — Goldman Sachs International (354,660 ) 354,660 — — Societe Generale S.A. (182,225 ) 182,225 — — UBS AG (322,896 ) 322,896 — — ProShares UltraShort Silver Deutsche Bank AG 462,619 — (462,619 ) — Goldman Sachs International 138,563 (138,563 ) — — Societe Generale S.A. 198,341 (198,341 ) — — UBS AG (204,570 ) 204,570 — — ProShares UltraShort Euro Goldman Sachs International 8,193,303 (6,008,925 ) — 2,184,378 UBS AG 8,569,691 (6,592,366 ) (11,518 ) 1,965,807 ProShares UltraShort Yen Goldman Sachs International (1,466,239 ) 1,466,239 — — UBS AG (112,536 ) 112,536 — — ProShares Ultra Bloomberg Commodity Deutsche Bank AG (143,751 ) 143,751 — — Goldman Sachs International (138,532 ) 138,532 — — UBS AG (49,055 ) 49,055 — — ProShares Ultra Bloomberg Crude Oil Deutsche Bank AG (24,223,667 ) 24,223,667 — — Goldman Sachs International (24,285,701 ) 24,285,701 — — Societe Generale S.A. (5,528,160 ) 5,528,160 — — UBS AG (22,143,569 ) 22,143,569 — — ProShares Ultra Gold Deutsche Bank AG 1,231,694 — (1,231,694 ) — Goldman Sachs International 222,126 — — 222,126 Societe Generale S.A. 190,591 (190,591 ) — — UBS AG 406,743 (406,743 ) — — ProShares Ultra Silver Deutsche Bank AG (6,220,069 ) 6,220,069 — — Goldman Sachs International (2,124,796 ) 2,124,796 — — Societe Generale S.A. (1,384,207 ) 1,384,207 — — UBS AG (2,666,048 ) 2,666,048 — — ProShares Ultra Euro Goldman Sachs International (38,856 ) 38,856 — — UBS AG (64,515 ) 64,515 — — ProShares Ultra Yen Goldman Sachs International (12,255 ) 12,255 — — UBS AG (2,990 ) 2,990 — —

Creation and Redemption of Cr21

Creation and Redemption of Creation Units (Tables)	12 Months Ended
	Dec. 31, 2015
Text Block [Abstract]
Schedule of Transaction Fees	Transaction fees for the years ended December 31, 2015, 2014 and 2013, 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, Year Ended December 31, Year Ended December 31, Managed Futures Strategy* $ — $ — $ N/A VIX Short-Term Futures ETF 105,024 72,020 — VIX Mid-Term Futures ETF 8,521 8,927 — Short VIX Short-Term Futures ETF 342,734 218,121 130,779 Ultra VIX Short-Term Futures ETF 1,391,292 734,298 814,195 UltraShort Bloomberg Commodity — — — UltraShort Bloomberg Crude Oil 382,054 257,458 298,261 UltraShort Bloomberg Natural Gas 8,853 26,053 7,434 UltraShort Gold 11,024 32,473 105,508 UltraShort Silver 39,354 48,832 128,850 Short Euro — — — UltraShort Australian Dollar — — — UltraShort Euro — — — UltraShort Yen — — — Ultra Bloomberg Commodity 2,194 249 487 Ultra Bloomberg Crude Oil 847,422 299,493 236,956 Ultra Bloomberg Natural Gas 13,939 30,073 42,172 Ultra Gold 4,218 12,088 23,035 Ultra Silver 38,848 65,208 107,285 Ultra Euro — — — Ultra Yen — — — Total Trust $ 3,195,477 $ 1,805,293 $ 1,894,962 * Fund commenced investment operations on October 1, 2014.

Financial Highlights (Tables)

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Per Share Operating Performance	Selected data for a Share outstanding throughout the year ended December 31, 2015: For the Year Ended December 31, 2015 Per Share Operating Performance Managed VIX Short- VIX Mid- Short VIX Ultra VIX UltraShort UltraShort Net asset value, at December 31, 2014 $ 21.1354 $ 20.9321 $ 63.6020 $ 61.4004 $ 125.4591 $ 87.7495 $ 77.9790 Net investment income (loss) (0.1750 ) (0.1324 ) (0.5053 ) (0.8162 ) (0.7224 ) (0.9438 ) (0.7848 ) Net realized and unrealized gain (loss)# (0.4266 ) (7.5575 ) (9.1341 ) (9.7692 ) (96.6526 ) 55.1020 56.0077 Change in net asset value from operations (0.6016 ) (7.6899 ) (9.6394 ) (10.5854 ) (97.3750 ) 54.1582 55.2229 Net asset value, at December 31, 2015 $ 20.5338 $ 13.2422 $ 53.9626 $ 50.8150 $ 28.0841 $ 141.9077 $ 133.2019 Market value per share, at December 31, 2014† $ 21.28 $ 20.99 $ 63.89 $ 61.16 $ 125.75 $ 87.44 $ 76.52 Market value per share, at December 31, 2015† $ 20.76 $ 13.33 $ 53.99 $ 50.45 $ 28.35 $ 140.41 $ 133.64 Total Return, at net asset value (2.8 )% (36.7 )% (15.2 )% (17.2 )% (77.6 )% 61.7 % 70.8 % Total Return, at market value (2.4 )% (36.5 )% (15.5 )% (17.5 )% (77.5 )% 60.6 % 74.6 % Ratios to Average Net Assets Expense ratio (0.84 )% (0.95 )% (0.91 )% (1.40 )% (1.65 )% (0.95 )% (1.07 )% Expense ratio, excluding brokerage commissions (0.75 )% (0.85 )% (0.85 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% Net investment income (loss) (0.84 )% (0.92 )% (0.88 )% (1.36 )% (1.61 )% (0.91 )% (1.04 )% * See Note 1 of these Notes to 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 UltraShort UltraShort Short UltraShort UltraShort UltraShort Net asset value, at December 31, 2014 $ 83.9577 $ 96.6516 $ 57.8071 $ 40.0617 $ 51.3790 $ 21.5946 $ 89.3336 Net investment income (loss) (1.3314 ) (0.9149 ) (0.4968 ) (0.4096 ) (0.5741 ) (0.2256 ) (0.8243 ) Net realized and unrealized gain (loss)# 56.9678 20.1432 7.2680 4.1246 7.6533 4.1716 (0.5704 ) Change in net asset value from operations 55.6364 19.2283 6.7712 3.7150 7.0792 3.9460 (1.3947 ) Net asset value, at December 31, 2015 $ 139.5941 $ 115.8799 $ 64.5783 $ 43.7767 $ 58.4582 $ 25.5406 $ 87.9389 Market value per share, at December 31, 2014† $ 82.03 $ 100.22 $ 59.70 $ 40.03 $ 51.37 $ 21.61 $ 89.30 Market value per share, at December 31, 2015† $ 139.66 $ 115.83 $ 64.55 $ 43.74 $ 58.15 $ 25.53 $ 87.89 Total Return, at net asset value 66.3 % 19.9 % 11.7 % 9.3 % 13.8 % 18.3 % (1.6 )% Total Return, at market value 70.3 % 15.6 % 8.1 % 9.3 % 13.2 % 18.1 % (1.6 )% Ratios to Average Net Assets Expense ratio (1.55 )% (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 )% (0.95 )% Net investment income (loss) (1.50 )% (0.91 )% (0.91 )% (0.95 )% (1.00 )% (0.90 )% (0.92 )% * See Note 1 of these Notes to 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 Ultra Ultra Ultra Gold Ultra Silver Ultra Ultra Net asset value, at December 31, 2014 $ 52.1342 $ 50.7400 $ 61.6491 $ 40.0011 $ 39.3657 $ 19.8744 $ 56.4747 Net investment income (loss) (0.3491 ) (0.2811 ) (0.4982 ) (0.3292 ) (0.3258 ) (0.1505 ) (0.4787 ) Net realized and unrealized gain (loss)# (23.3572 ) (37.8815 ) (42.5811 ) (9.9424 ) (11.9761 ) (4.2132 ) (1.2433 ) Change in net asset value from operations (23.7063 ) (38.1626 ) (43.0793 ) (10.2716 ) (12.3019 ) (4.3637 ) (1.7220 ) Net asset value, at December 31, 2015 $ 28.4279 $ 12.5774 $ 18.5698 $ 29.7295 $ 27.0638 $ 15.5107 $ 54.7527 Market value per share, at December 31, 2014† $ 51.44 $ 51.85 $ 63.12 $ 38.41 $ 38.05 $ 19.80 $ 56.48 Market value per share, at December 31, 2015† $ 28.07 $ 12.54 $ 18.48 $ 29.73 $ 27.08 $ 15.51 $ 54.70 Total Return, at net asset value (45.5 )% (75.2 )% (69.9 )% (25.7 )% (31.3 )% (22.0 )% (3.0 )% Total Return, at market value (45.4 )% (75.8 )% (70.7 )% (22.6 )% (28.8 )% (21.7 )% (3.2 )% Ratios to Average Net Assets Expense ratio (0.95 )% (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 )% (0.95 )% Net investment income (loss) (0.93 )% (0.98 )% (1.26 )% (0.90 )% (0.89 )% (0.93 )% (0.88 )% * See Note 1 of these Notes to 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 Managed VIX Short- VIX Mid- Short VIX Ultra VIX UltraShort UltraShort Net asset value, beginning of period $ 20.0000 $ 28.5387 $ 77.1837 $ 67.4993 $ 335.4203 $ 63.2936 $ 31.7301 Net investment income (loss) (0.0417 ) (0.2047 ) (0.5666 ) (1.0247 ) (2.9055 ) (0.5679 ) (0.2773 ) Net realized and unrealized gain (loss)# 1.1771 (7.4019 ) (13.0151 ) (5.0742 ) (207.0557 ) 25.0238 46.5262 Change in net asset value from operations 1.1354 (7.6066 ) (13.5817 ) (6.0989 ) (209.9612 ) 24.4559 46.2489 Net asset value, at December 31, 2014 $ 21.1354 $ 20.9321 $ 63.6020 $ 61.4004 $ 125.4591 $ 87.7495 $ 77.9790 Market value per share, at December 31, 2013† $ — $ 28.53 $ 77.16 $ 67.47 $ 335.60 $ 58.41 $ 31.58 Market value per share, at December 31, 2014† $ 21.28 $ 20.99 $ 63.89 $ 61.16 $ 125.75 $ 87.44 $ 76.52 Total Return, at net asset value 5.7 %^ (26.7 )% (17.6 )% (9.0 )% (62.6 )% 38.6 % 145.8 % Total Return, at market value 6.4 %^ (26.4 )% (17.2 )% (9.4 )% (62.5 )% 49.7 % 142.3 % Ratios to Average Net Assets Expense ratio (0.82 )%** (0.92 )% (0.87 )% (1.49 )% (1.80 )% (0.95 )% (0.98 )% Expense ratio, excluding brokerage commissions (0.75 )%** (0.85 )% (0.85 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% Net investment income (loss) (0.82 )%** (0.88 )% (0.84 )% (1.46 )% (1.78 )% (0.92 )% (0.94 )% * See Note 1 of these Notes to Financial Statements. + From commencement of operations, October 1, 2014, through December 31, 2014. # 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. ^ Percentages are not annualized for the period ended December 31, 2014. The return for a share outstanding for 2014 is calculated based on the initial offering price upon commencement of investment operations of $20.0000 for ProShares Managed Futures Strategy. ** Percentage are annualized. For the Year Ended December 31, 2014 Per Share Operating Performance UltraShort UltraShort UltraShort Short UltraShort UltraShort UltraShort Net asset value, at December 31, 2013 $ 69.9635 $ 103.5180 $ 44.8910 $ 35.5867 $ 46.6384 $ 17.0613 $ 70.8640 Net investment income (loss) (0.4961 ) (0.8233 ) (0.3937 ) (0.3428 ) (0.4272 ) (0.1642 ) (0.6412 ) Net realized and unrealized gain (loss)# 14.4903 (6.0431 ) 13.3098 4.8178 5.1678 4.6975 19.1108 Change in net asset value from operations 13.9942 (6.8664 ) 12.9161 4.4750 4.7406 4.5333 18.4696 Net asset value, at December 31, 2014 $ 83.9577 $ 96.6516 $ 57.8071 $ 40.0617 $ 51.3790 $ 21.5946 $ 89.3336 Market value per share, at December 31, 2013† $ 69.36 $ 103.53 $ 45.10 $ 35.66 $ 46.66 $ 17.06 $ 70.91 Market value per share, at December 31, 2014† $ 82.03 $ 100.22 $ 59.70 $ 40.03 $ 51.37 $ 21.61 $ 89.30 Total Return, at net asset value 20.0 % (6.6 )% 28.8 % 12.6 % 10.2 % 26.6 % 26.1 % Total Return, at market value 18.3 % (3.2 )% 32.4 % 12.3 % 10.1 % 26.7 % 25.9 % Ratios to Average Net Assets Expense ratio (1.18 )% (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 )% (0.95 )% Net investment income (loss) (1.14 )% (0.91 )% (0.90 )% (0.93 )% (0.97 )% (0.90 )% (0.90 )% * See Note 1 of these Notes to 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 Ultra Ultra Ultra Ultra Gold Ultra Silver Ultra Ultra Yen* Net asset value, at December 31, 2013 $ 77.7259 $ 160.4495 $ 155.3534 $ 41.2553 $ 63.3305 $ 26.0346 $ 74.5261 Net investment income (loss) (0.7047 ) (1.0928 ) (1.5167 ) (0.4078 ) (0.5348 ) (0.2185 ) (0.6693 ) Net realized and unrealized gain (loss)# (24.8870 ) (108.6167 ) (92.1876 ) (0.8464 ) (23.4300 ) (5.9417 ) (17.3821 ) Change in net asset value from operations (25.5917 ) (109.7095 ) (93.7043 ) (1.2542 ) (23.9648 ) (6.1602 ) (18.0514 ) Net asset value, at December 31, 2014 $ 52.1342 $ 50.7400 $ 61.6491 $ 40.0011 $ 39.3657 $ 19.8744 $ 56.4747 Market value per share, at December 31, 2013† $ 76.52 $ 161.10 $ 157.12 $ 41.26 $ 63.04 $ 25.98 $ 74.44 Market value per share, at December 31, 2014† $ 51.44 $ 51.85 $ 63.12 $ 38.41 $ 38.05 $ 19.80 $ 56.48 Total Return, at net asset value (32.9 )% (68.4 )% (60.3 )% (3.0 )% (37.8 )% (23.7 )% (24.2 )% Total Return, at market value (32.8 )% (67.8 )% (59.8 )% (6.9 )% (39.6 )% (23.8 )% (24.1 )% Ratios to Average Net Assets Expense ratio (0.95 )% (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 )% (0.95 )% Net investment income (loss) (0.91 )% (0.95 )% (1.10 )% (0.91 )% (0.91 )% (0.91 )% (0.90 )% * See Note 1 of these Notes to 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, 2013 For the Year Ended December 31, 2013 Per Share Operating Performance VIX Short- VIX Mid- Short VIX Ultra VIX UltraShort UltraShort UltraShort Net asset value, at December 31, 2012 $ 83.9374 $ 138.8013 $ 33.0649 $ 4,026.4321 $ 54.1021 $ 40.3079 $ 102.1402 Net investment income (loss) (0.3518 ) (0.7892 ) (0.7398 ) (15.0047 ) (0.5355 ) (0.3033 ) (0.9217 ) Net realized and unrealized gain (loss)# (55.0469 ) (60.8284 ) 35.1742 (3,676.0071 ) 9.7270 (8.2745 ) (31.2550 ) Change in net asset value from operations (55.3987 ) (61.6176 ) 34.4344 (3,691.0118 ) 9.1915 (8.5778 ) (32.1767 ) Net asset value, at December 31, 2013 $ 28.5387 $ 77.1837 $ 67.4993 $ 335.4203 $ 63.2936 $ 31.7301 $ 69.9635 Market value per share, at December 31, 2012† $ 85.05 $ 136.88 $ 32.73 $ 4,180.00 $ 51.64 $ 40.44 $ 101.64 Market value per share, at December 31, 2013† $ 28.53 $ 77.16 $ 67.47 $ 335.60 $ 58.41 $ 31.58 $ 69.36 Total Return, at net asset value (66.0 )% (44.4 )% 104.1 % (91.7 )% 17.0 % (21.3 )% (31.5 )% Total Return, at market value (66.5 )% (43.6 )% 106.2 % (92.0 )% 13.1 % (21.9 )% (31.8 )% Ratios to Average Net Assets Expense ratio (0.85 )% (0.85 )% (1.53 )% (1.82 )% (0.95 )% (0.98 )% (1.20 )% Expense ratio, excluding brokerage commissions (0.85 )% (0.85 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% Net investment income (loss) (0.81 )% (0.81 )% (1.49 )% (1.80 )% (0.90 )% (0.94 )% (1.15 )% * See Note 1 of these Notes to 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, 2013 Per Share Operating Performance UltraShort UltraShort Short Euro UltraShort UltraShort UltraShort Ultra Net asset value, at December 31, 2012 $ 63.8688 $ 25.6975 $ 37.6285 $ 37.8081 $ 19.0172 $ 50.7577 $ 97.5491 Net investment income (loss) (0.7561 ) (0.3112 ) (0.3430 ) (0.4325 ) (0.1677 ) (0.5662 ) (0.7780 ) Net realized and unrealized gain (loss)# 40.4053 19.5047 (1.6988 ) 9.2628 (1.7882 ) 20.6725 (19.0452 ) Change in net asset value from operations 39.6492 19.1935 (2.0418 ) 8.8303 (1.9559 ) 20.1063 (19.8232 ) Net asset value, at December 31, 2013 $ 103.5180 $ 44.8910 $ 35.5867 $ 46.6384 $ 17.0613 $ 70.8640 $ 77.7259 Market value per share, at December 31, 2012† $ 62.60 $ 25.04 $ 37.64 $ 37.74 $ 19.01 $ 50.77 $ 95.72 Market value per share, at December 31, 2013† $ 103.53 $ 45.10 $ 35.66 $ 46.66 $ 17.06 $ 70.91 $ 76.52 Total Return, at net asset value 62.1 % 74.7 % (5.4 )% 23.4 % (10.3 )% 39.6 % (20.3 )% Total Return, at market value 65.4 % 80.1 % (5.3 )% 23.6 % (10.3 )% 39.7 % (20.1 )% Ratios to Average Net Assets Expense ratio (0.95 )% (0.95 )% (0.96 )% (1.02 )% (0.95 )% (0.95 )% (0.95 )% Expense ratio, excluding brokerage commissions (0.95 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% (0.95 )% Net investment income (loss) (0.90 )% (0.89 )% (0.93 )% (0.99 )% (0.90 )% (0.91 )% (0.90 )% * See Note 1 of these Notes to 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, 2013 Per Share Operating Performance Ultra Ultra Ultra Gold Ultra Silver* Ultra Euro Ultra Yen* Net asset value, at December 31, 2012 $ 146.9706 $ 156.1962 $ 83.7634 $ 171.8906 $ 24.3499 $ 112.7345 Net investment income (loss) (1.4243 ) (1.6214 ) (0.5404 ) (0.8789 ) (0.2200 ) (0.7984 ) Net realized and unrealized gain (loss)# 14.9032 0.7786 (41.9677 ) (107.6812 ) 1.9047 (37.4100 ) Change in net asset value from operations 13.4789 (0.8428 ) (42.5081 ) (108.5601 ) 1.6847 (38.2084 ) Net asset value, at December 31, 2013 $ 160.4495 $ 155.3534 $ 41.2553 $ 63.3305 $ 26.0346 $ 74.5261 Market value per share, at December 31, 2012† $ 146.60 $ 156.96 $ 85.34 $ 176.40 $ 24.32 $ 113.12 Market value per share, at December 31, 2013† $ 161.10 $ 157.12 $ 41.26 $ 63.04 $ 25.98 $ 74.44 Total Return, at net asset value 9.2 % (0.5 )% (50.7 )% (63.2 )% 6.9 % (33.9 )% Total Return, at market value 9.9 % 0.1 % (51.7 )% (64.3 )% 6.8 % (34.2 )% Ratios to Average Net Assets Expense ratio (0.97 )% (1.15 )% (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) (0.92 )% (1.10 )% (0.89 )% (0.89 )% (0.90 )% (0.90 )% * See Note 1 of these Notes to 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 - Futur

Schedule of Investments - Futures Contracts Purchased (Detail) - Futures Contracts Purchased [Member]		12 Months Ended
		Dec. 31, 2015USD ($)Contract		Dec. 31, 2014USD ($)Contract
ProShares Managed Futures Strategy [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (2,369)	[1]	$ (7,380)	[2]
ProShares Managed Futures Strategy [Member] | Coffee 'C' Futures - ICE, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			1
Notional Amount at Value	[2]			$ 62,475
Unrealized Appreciation (Depreciation)	[2]			$ (5,231)
ProShares Managed Futures Strategy [Member] | Soybean Futures - CBT, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			3
Notional Amount at Value	[2]			$ 153,525
Unrealized Appreciation (Depreciation)	[2]			$ (2,350)
ProShares Managed Futures Strategy [Member] | US Treasury Long Bond Futures - CBT, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			3
Notional Amount at Value	[2]			$ 433,688
Unrealized Appreciation (Depreciation)	[2]			$ 5,750
ProShares Managed Futures Strategy [Member] | US 10 YR Note Futures - CBT, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			6
Notional Amount at Value	[2]			$ 760,781
Unrealized Appreciation (Depreciation)	[2]			$ 4,536
ProShares Managed Futures Strategy [Member] | Live Cattle Futures - CME, Expires April 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			5
Notional Amount at Value	[2]			$ 324,800
Unrealized Appreciation (Depreciation)	[2]			$ (930)
ProShares Managed Futures Strategy [Member] | Corn Futures - CBT, Expires July 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			6
Notional Amount at Value	[2]			$ 123,750
Unrealized Appreciation (Depreciation)	[2]			$ 838
ProShares Managed Futures Strategy [Member] | Wheat Futures - CBT, Expires December 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			4
Notional Amount at Value	[2]			$ 122,950
Unrealized Appreciation (Depreciation)	[2]			$ (1,013)
ProShares Managed Futures Strategy [Member] | Natural Gas Futures - NYMEX, Expires January 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			3
Notional Amount at Value	[2]			$ 105,930
Unrealized Appreciation (Depreciation)	[2]			(8,980)
ProShares Managed Futures Strategy [Member] | Australian Dollar Fx Currency Futures - CME, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	4
Notional Amount at Value	[1]	$ 290,640
Unrealized Appreciation (Depreciation)	[1]	$ 540
ProShares Managed Futures Strategy [Member] | Cocoa Futures - ICE, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	9
Notional Amount at Value	[1]	$ 288,990
Unrealized Appreciation (Depreciation)	[1]	$ (5,850)
ProShares Managed Futures Strategy [Member] | Cotton No. 2 Futures - ICE, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	9
Notional Amount at Value	[1]	$ 284,760
Unrealized Appreciation (Depreciation)	[1]	$ (4,780)
ProShares Managed Futures Strategy [Member] | Sugar #11 Futures - ICE, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	11
Notional Amount at Value	[1]	$ 187,757
Unrealized Appreciation (Depreciation)	[1]	7,721
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (1,078,625)	[3]	$ 6,264,620	[4]
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[4]			3,326
Notional Amount at Value	[4]			$ 59,951,150
Unrealized Appreciation (Depreciation)	[4]			$ 3,425,757
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[4]			2,775
Notional Amount at Value	[4]			$ 50,574,375
Unrealized Appreciation (Depreciation)	[4]			2,838,863
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[3]	2,821
Notional Amount at Value	[3]	$ 52,259,025
Unrealized Appreciation (Depreciation)	[3]	$ (958,831)
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[3]	2,821
Notional Amount at Value	[3]	$ 53,246,375
Unrealized Appreciation (Depreciation)	[3]	(119,794)
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (344,360)	[5]	$ 260,665	[6]
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires April 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[6]			205
Notional Amount at Value	[6]			$ 3,818,125
Unrealized Appreciation (Depreciation)	[6]			$ (222,845)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires May 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[6]			376
Notional Amount at Value	[6]			$ 7,097,000
Unrealized Appreciation (Depreciation)	[6]			$ 302,905
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires June 2015 [Member ]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[6]			376
Notional Amount at Value	[6]			$ 7,191,000
Unrealized Appreciation (Depreciation)	[6]			$ 54,730
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires July 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[6]			172
Notional Amount at Value	[6]			$ 3,349,700
Unrealized Appreciation (Depreciation)	[6]			125,875
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires April 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[5]	235
Notional Amount at Value	[5]	$ 4,547,250
Unrealized Appreciation (Depreciation)	[5]	$ (168,335)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires May 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[5]	469
Notional Amount at Value	[5]	$ 9,145,500
Unrealized Appreciation (Depreciation)	[5]	$ 10,005
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires June 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[5]	469
Notional Amount at Value	[5]	$ 9,262,750
Unrealized Appreciation (Depreciation)	[5]	$ (135,125)
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures - CBOE, Expires July 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[5]	234
Notional Amount at Value	[5]	$ 4,691,700
Unrealized Appreciation (Depreciation)	[5]	(50,905)
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 11,894,466	[7]	$ 39,585,253	[8]
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[8]			21,092
Notional Amount at Value	[8]			$ 380,183,300
Unrealized Appreciation (Depreciation)	[8]			$ 22,932,077
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[8]			17,586
Notional Amount at Value	[8]			$ 320,497,650
Unrealized Appreciation (Depreciation)	[8]			$ 16,653,176
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[7]	29,321
Notional Amount at Value	[7]	$ 543,171,525
Unrealized Appreciation (Depreciation)	[7]	$ 10,546,019
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[7]	29,320
Notional Amount at Value	[7]	$ 553,415,000
Unrealized Appreciation (Depreciation)	[7]	$ 1,348,447
ProShares Ultra Bloomberg Crude Oil [Member] | Crude Oil - NYMEX, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[9]			7,232
Notional Amount at Value	[9]			$ 388,358,400
Unrealized Appreciation (Depreciation)	[9]			$ (46,474,787)
ProShares Ultra Bloomberg Crude Oil [Member] | Crude Oil - NYMEX, Expires March 2016 [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] | Natural Gas - NYMEX, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[11]			4,864
Notional Amount at Value	[11]			$ 140,861,440
Unrealized Appreciation (Depreciation)	[11]			$ (34,889,283)
ProShares Ultra Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, Expires March 2016 [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] | Gold Futures - COMEX, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[13]			2
Notional Amount at Value	[13]			$ 236,820
Unrealized Appreciation (Depreciation)	[13]			$ 4,580
ProShares Ultra Gold [Member] | Gold Futures - COMEX, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[14]	2
Notional Amount at Value	[14]	$ 212,040
Unrealized Appreciation (Depreciation)	[14]	$ (5,200)
ProShares Ultra Silver [Member] | Silver Futures - COMEX, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[15]			2
Notional Amount at Value	[15]			$ 155,990
Unrealized Appreciation (Depreciation)	[15]			$ (1,560)
ProShares Ultra Silver [Member] | Silver Futures - COMEX, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[16]	3
Notional Amount at Value	[16]	$ 207,045
Unrealized Appreciation (Depreciation)	[16]	$ (9,030)
[1]	Cash collateral in the amount of $280,322 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[2]	Cash collateral in the amount of $195,142 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[3]	Cash collateral in the amount of $5,888,545 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[4]	Cash collateral in the amount of $18,439,750 was pledged to cover margin requirements for open futures contracts as of December 31, 2014
[5]	Cash collateral in the amount of $980,750 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[6]	Cash collateral in the amount of $1,906,950 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[7]	Cash collateral in the amount of $62,348,600 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[8]	Cash collateral in the amount of $116,907,700 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[9]	Cash collateral in the amount of $34,605,120 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[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 $21,134,080 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[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]	Cash collateral in the amount of $8,800 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[14]	Cash collateral in the amount of $8,250 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[15]	Cash collateral in the amount of $14,300 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[16]	Cash collateral in the amount of $17,160 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.

Schedule of Investments - Fut24

Schedule of Investments - Futures Contracts Sold (Detail) - Futures Contracts Sold [Member]		Dec. 31, 2015USD ($)Contract		Dec. 31, 2014USD ($)Contract
ProShares Managed Futures Strategy [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 59,548	[1]	$ 111,707	[2]
ProShares Managed Futures Strategy [Member] | Gold Mini Futures - ICE, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			4
Notional Amount at Value	[2]			$ 152,275
Unrealized Appreciation (Depreciation)	[2]			$ 1,530
ProShares Managed Futures Strategy [Member] | Lean Hogs Futures - CME, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			6
Notional Amount at Value	[2]			$ 194,880
Unrealized Appreciation (Depreciation)	[2]			$ 7,980
ProShares Managed Futures Strategy [Member] | NY Harbor USLD Futures - NYMEX, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			2
Notional Amount at Value	[2]			$ 154,022
Unrealized Appreciation (Depreciation)	[2]			$ 14,704
ProShares Managed Futures Strategy [Member] | RBOB Gasoline Futures - NYMEX, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			2
Notional Amount at Value	[2]			$ 123,656
Unrealized Appreciation (Depreciation)	[2]			$ 16,057
ProShares Managed Futures Strategy [Member] | WTI Crude Oil Mini Futures - NYMEX, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			4
Notional Amount at Value	[2]			$ 106,472
Unrealized Appreciation (Depreciation)	[2]			$ 19,116
ProShares Managed Futures Strategy [Member] | Australian Dollar Fx Currency Futures - CME, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			3
Notional Amount at Value	[2]			$ 243,660
Unrealized Appreciation (Depreciation)	[2]			$ 3,865
ProShares Managed Futures Strategy [Member] | British Pound Fx Currency Futures - CME, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			6
Notional Amount at Value	[2]			$ 583,875
Unrealized Appreciation (Depreciation)	[2]			$ 2,540
ProShares Managed Futures Strategy [Member] | Canadian Dollar Fx Currency Futures - CME, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			4
Notional Amount at Value	[2]			$ 343,880
Unrealized Appreciation (Depreciation)	[2]			$ 4,190
ProShares Managed Futures Strategy [Member] | Cocoa Futures - ICE, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			13
Notional Amount at Value	[2]			$ 378,300
Unrealized Appreciation (Depreciation)	[2]			$ 1,360
ProShares Managed Futures Strategy [Member] | Copper Futures - COMEX, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			3
Notional Amount at Value	[2]			$ 211,913
Unrealized Appreciation (Depreciation)	[2]			$ 7,700
ProShares Managed Futures Strategy [Member] | Copper Mini Futures - COMEX, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			3
Notional Amount at Value	[2]			$ 105,975
Unrealized Appreciation (Depreciation)	[2]			$ 2,850
ProShares Managed Futures Strategy [Member] | Cotton No. 2 Futures - ICE, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			5
Notional Amount at Value	[2]			$ 150,675
Unrealized Appreciation (Depreciation)	[2]			$ 2,272
ProShares Managed Futures Strategy [Member] | Euro Fx Currency Mini Futures - CME, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			5
Notional Amount at Value	[2]			$ 378,344
Unrealized Appreciation (Depreciation)	[2]			$ 7,069
ProShares Managed Futures Strategy [Member] | Japanese Yen Fx Currency Futures - CME, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			3
Notional Amount at Value	[2]			$ 313,088
Unrealized Appreciation (Depreciation)	[2]			$ 2,413
ProShares Managed Futures Strategy [Member] | Silver Mini Futures - ICE, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			6
Notional Amount at Value	[2]			$ 93,594
Unrealized Appreciation (Depreciation)	[2]			$ 3,966
ProShares Managed Futures Strategy [Member] | Swiss Franc Fx Currency Futures - CME, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			3
Notional Amount at Value	[2]			$ 377,775
Unrealized Appreciation (Depreciation)	[2]			$ 6,000
ProShares Managed Futures Strategy [Member] | Sugar #11 Futures - ICE, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[2]			8
Notional Amount at Value	[2]			$ 130,099
Unrealized Appreciation (Depreciation)	[2]			8,095
ProShares Managed Futures Strategy [Member] | Gold 100 OZ Futures - COMEX, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	1
Notional Amount at Value	[1]	$ 106,020
Unrealized Appreciation (Depreciation)	[1]	$ 2,390
ProShares Managed Futures Strategy [Member] | Gold Mini Futures - ICE, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	4
Notional Amount at Value	[1]	$ 136,342
Unrealized Appreciation (Depreciation)	[1]	$ 645
ProShares Managed Futures Strategy [Member] | Lean Hogs Futures - CME, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	11
Notional Amount at Value	[1]	$ 263,120
Unrealized Appreciation (Depreciation)	[1]	$ (1,560)
ProShares Managed Futures Strategy [Member] | Live Cattle Futures - CME, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	7
Notional Amount at Value	[1]	$ 383,040
Unrealized Appreciation (Depreciation)	[1]	$ (4,950)
ProShares Managed Futures Strategy [Member] | Natural Gas Futures - NYMEX, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	7
Notional Amount at Value	[1]	$ 163,590
Unrealized Appreciation (Depreciation)	[1]	$ (11,237)
ProShares Managed Futures Strategy [Member] | NY Harbor ULSD Futures - NYMEX, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	2
Notional Amount at Value	[1]	$ 94,408
Unrealized Appreciation (Depreciation)	[1]	$ 14,028
ProShares Managed Futures Strategy [Member] | RBOB Gasoline Futures - NYMEX, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	2
Notional Amount at Value	[1]	$ 106,764
Unrealized Appreciation (Depreciation)	[1]	$ 2,033
ProShares Managed Futures Strategy [Member] | WTI Crude Oil Futures - NYMEX, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	2
Notional Amount at Value	[1]	$ 74,080
Unrealized Appreciation (Depreciation)	[1]	$ 8,680
ProShares Managed Futures Strategy [Member] | British Pound Fx Currency Futures - CME, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	4
Notional Amount at Value	[1]	$ 368,350
Unrealized Appreciation (Depreciation)	[1]	$ 8,806
ProShares Managed Futures Strategy [Member] | Euro Fx Currency Futures - CME, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	2
Notional Amount at Value	[1]	$ 272,150
Unrealized Appreciation (Depreciation)	[1]	$ 363
ProShares Managed Futures Strategy [Member] | Canadian Dollar Fx Currency Futures - CME, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	5
Notional Amount at Value	[1]	$ 361,650
Unrealized Appreciation (Depreciation)	[1]	$ 10,180
ProShares Managed Futures Strategy [Member] | Coffee 'C' Futures - ICE, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	3
Notional Amount at Value	[1]	$ 142,537
Unrealized Appreciation (Depreciation)	[1]	$ (4,181)
ProShares Managed Futures Strategy [Member] | Copper Futures - COMEX, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	4
Notional Amount at Value	[1]	$ 213,500
Unrealized Appreciation (Depreciation)	[1]	$ 10,975
ProShares Managed Futures Strategy [Member] | Corn Futures - CBT, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	11
Notional Amount at Value	[1]	$ 197,312
Unrealized Appreciation (Depreciation)	[1]	$ 14,512
ProShares Managed Futures Strategy [Member] | Japanese Yen Fx Currency Futures - CME, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	5
Notional Amount at Value	[1]	$ 520,813
Unrealized Appreciation (Depreciation)	[1]	$ (10,399)
ProShares Managed Futures Strategy [Member] | Silver Futures - COMEX, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	1
Notional Amount at Value	[1]	$ 69,015
Unrealized Appreciation (Depreciation)	[1]	$ 3,625
ProShares Managed Futures Strategy [Member] | Silver Mini Futures - ICE, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	4
Notional Amount at Value	[1]	$ 55,212
Unrealized Appreciation (Depreciation)	[1]	$ 455
ProShares Managed Futures Strategy [Member] | Soybean Futures - CBT, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	5
Notional Amount at Value	[1]	$ 216,063
Unrealized Appreciation (Depreciation)	[1]	$ 5,937
ProShares Managed Futures Strategy [Member] | Swiss Franc Fx Currency Futures - CME, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	2
Notional Amount at Value	[1]	$ 250,800
Unrealized Appreciation (Depreciation)	[1]	$ 1,275
ProShares Managed Futures Strategy [Member] | U.S. 10 YR Note Futures - CBT, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	9
Notional Amount at Value	[1]	$ 1,133,156
Unrealized Appreciation (Depreciation)	[1]	$ 1,234
ProShares Managed Futures Strategy [Member] | U.S. Treasury Long Bond Futures - CBT, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	5
Notional Amount at Value	[1]	$ 768,750
Unrealized Appreciation (Depreciation)	[1]	$ 2,312
ProShares Managed Futures Strategy [Member] | Wheat Futures - CBT, Expires March 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[1]	9
Notional Amount at Value	[1]	$ 211,500
Unrealized Appreciation (Depreciation)	[1]	4,425
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 10,746,415	[3]	$ (16,352,149)	[4]
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[4]			15,388
Notional Amount at Value	[4]			$ 277,368,700
Unrealized Appreciation (Depreciation)	[4]			$ (701,599)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[4]			12,811
Notional Amount at Value	[4]			$ 233,480,475
Unrealized Appreciation (Depreciation)	[4]			$ (15,650,550)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires January 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[3]	17,150
Notional Amount at Value	[3]	$ 317,703,750
Unrealized Appreciation (Depreciation)	[3]	$ 10,805,245
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - CBOE, Expires February 2016 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[3]	17,151
Notional Amount at Value	[3]	$ 323,725,125
Unrealized Appreciation (Depreciation)	[3]	$ (58,830)
ProShares UltraShort Bloomberg Crude Oil [Member] | Crude Oil - NYMEX, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[5]			2,569
Notional Amount at Value	[5]			$ 137,955,300
Unrealized Appreciation (Depreciation)	[5]			$ 15,806,603
ProShares UltraShort Bloomberg Crude Oil [Member] | Crude Oil - NYMEX, Expires March 2016 [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 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[7]			1,014
Notional Amount at Value	[7]			$ 29,365,440
Unrealized Appreciation (Depreciation)	[7]			$ 3,941,465
ProShares UltraShort Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, Expires March 2016 [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] | Gold Futures - COMEX, Expires February 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[9]			2
Notional Amount at Value	[9]			$ 236,820
Unrealized Appreciation (Depreciation)	[9]			$ (4,520)
ProShares UltraShort Gold [Member] | Gold Futures - COMEX, Expires February 2016 [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] | Silver Futures - COMEX, Expires March 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[11]			2
Notional Amount at Value	[11]			$ 155,990
Unrealized Appreciation (Depreciation)	[11]			$ 1,560
ProShares UltraShort Silver [Member] | Silver Futures - COMEX, Expires March 2016 [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 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[13]			92
Notional Amount at Value	[13]			$ 13,923,050
Unrealized Appreciation (Depreciation)	[13]			$ 385,331
ProShares Short Euro [Member] | Euro Fx Currency Futures - CME, Expires March 2016 [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 2015 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	[15]			569
Notional Amount at Value	[15]			$ 46,214,180
Unrealized Appreciation (Depreciation)	[15]			$ 743,481
ProShares UltraShort Australian Dollar [Member] | Australian Dollar Fx Currency Futures - CME, Expires March 2016 [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 $280,322 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[2]	Cash collateral in the amount of $195,142 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[3]	Cash collateral in the amount of $123,528,405 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[4]	Cash collateral in the amount of $85,244,950 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[5]	Cash collateral in the amount of $12,292,665 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[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 $4,405,830 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[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 $8,800 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[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, 2014.
[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 $242,880 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[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 $1,020,217 was pledged to cover margin requirements for open futures contracts as of December 31, 2014.
[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 - Fut25

Schedule of Investments - Futures Contracts Sold (Parenthetical) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
ProShares Managed Futures Strategy [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 280,322	$ 195,142
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	123,528,405	85,244,950
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	10,154,430	12,292,665
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	2,046,660	4,405,830
ProShares UltraShort Gold [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	8,250	8,800
ProShares UltraShort Silver [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	11,440
ProShares UltraShort Silver [Member] | Futures Contracts Purchased [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements		14,300
ProShares Short Euro [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	503,745	242,880
ProShares UltraShort Australian Dollar [Member] | Futures Contracts Sold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 57,065	$ 1,020,217

Schedule of Investments - Short

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Detail) - USD ($)		Dec. 31, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		$ 3,313,591,600	$ 3,005,876,580
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		96,073,659	82,088,299
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.033% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			3,961,000
Total short-term U.S. government and Value			3,960,990
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			305,000
Total short-term U.S. government and Value			304,995
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			12,836,000
Total short-term U.S. government and Value			12,835,807
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.011% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,357,000
Total short-term U.S. government and Value			1,356,969
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			3,939,000
Total short-term U.S. government and Value			3,938,895
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.023% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			12,894,000
Total short-term U.S. government and Value			12,893,667
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			5,181,000
Total short-term U.S. government and Value			5,180,626
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			186,000
Total short-term U.S. government and Value			185,976
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			4,724,000
Total short-term U.S. government and Value			4,723,221
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.028% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			6,927,000
Total short-term U.S. government and Value			6,925,663
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.071% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			11,197,000
Total short-term U.S. government and Value			11,194,275
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			18,593,000
Total short-term U.S. government and Value			18,587,215
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		5,167,000
Total short-term U.S. government and Value		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		4,768,000
Total short-term U.S. government and Value		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		44,408,000
Total short-term U.S. government and Value		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		6,625,000
Total short-term U.S. government and Value		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		2,943,000
Total short-term U.S. government and Value		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		2,214,000
Total short-term U.S. government and Value		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]	14,428,000
Total short-term U.S. government and Value	[1]	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]	5,088,000
Total short-term U.S. government and Value	[1]	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]	10,459,000
Total short-term U.S. government and Value	[1]	10,442,797
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		25,976,287	24,105,906
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.071% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,551,000
Total short-term U.S. government and Value			1,550,623
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			5,178,000
Total short-term U.S. government and Value			5,176,389
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.012% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,894,000
Total short-term U.S. government and Value			1,893,968
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.012% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			345,000
Total short-term U.S. government and Value			344,992
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.025% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,563,000
Total short-term U.S. government and Value			1,562,960
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			12,807,000
Total short-term U.S. government and Value			12,806,075
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			771,000
Total short-term U.S. government and Value			770,899
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		1,778,000
Total short-term U.S. government and Value		1,777,808
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		15,119,000
Total short-term U.S. government and Value		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]	9,082,000
Total short-term U.S. government and Value	[1]	9,080,586
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		535,392,718	446,975,220
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			6,920,000
Total short-term U.S. government and Value			6,919,500
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.040% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,850,000
Total short-term U.S. government and Value			1,849,995
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.006% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			22,078,000
Total short-term U.S. government and Value			22,077,632
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.010% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			9,864,000
Total short-term U.S. government and Value			9,863,852
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.021% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,830,000
Total short-term U.S. government and Value			1,829,951
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.019% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			90,719,000
Total short-term U.S. government and Value			90,716,657
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.016% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			151,190,000
Total short-term U.S. government and Value			151,184,205
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.063% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			7,752,000
Total short-term U.S. government and Value			7,750,721
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.066% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			61,759,000
Total short-term U.S. government and Value			61,747,077
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.073% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			16,216,000
Total short-term U.S. government and Value			16,212,054
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.072% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			67,517,000
Total short-term U.S. government and Value			67,495,479
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.030% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			9,331,000
Total short-term U.S. government and Value			9,328,097
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		22,342,000
Total short-term U.S. government and Value		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		10,901,000
Total short-term U.S. government and Value		10,899,819
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		44,561,000
Total short-term U.S. government and Value		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		13,600,000
Total short-term U.S. government and Value		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		10,817,000
Total short-term U.S. government and Value		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		36,091,000
Total short-term U.S. government and Value		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		85,348,000
Total short-term U.S. government and Value		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		63,916,000
Total short-term U.S. government and Value		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		74,289,000
Total short-term U.S. government and Value		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		35,842,000
Total short-term U.S. government and Value		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]	137,956,000
Total short-term U.S. government and Value	[1]	137,742,279
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		438,357,849	182,639,188
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.033% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,925,000
Total short-term U.S. government and Value			2,924,993
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			43,147,000
Total short-term U.S. government and Value			43,143,884
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			14,824,000
Total short-term U.S. government and Value			14,821,554
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.012% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,436,000
Total short-term U.S. government and Value			1,435,967
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.010% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			12,113,000
Total short-term U.S. government and Value			12,112,818
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.021% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			16,715,000
Total short-term U.S. government and Value			16,714,554
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.030% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,854,000
Total short-term U.S. government and Value			1,853,423
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.009% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			15,872,000
Total short-term U.S. government and Value			15,871,735
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.014% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			12,248,000
Total short-term U.S. government and Value			12,247,684
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,602,000
Total short-term U.S. government and Value			1,601,939
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.026% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			24,222,000
Total short-term U.S. government and Value			24,217,324
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.049% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			35,702,000
Total short-term U.S. government and Value			35,693,313
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]	77,557,000
Total short-term U.S. government and Value	[1]	77,436,849
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		1,327,000
Total short-term U.S. government and Value		1,326,944
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		1,000,000
Total short-term U.S. government and Value		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		9,071,000
Total short-term U.S. government and Value		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		3,000,000
Total short-term U.S. government and Value		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		2,385,000
Total short-term U.S. government and Value		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		15,718,000
Total short-term U.S. government and Value		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		8,386,000
Total short-term U.S. government and Value		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		62,257,000
Total short-term U.S. government and Value		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		71,491,000
Total short-term U.S. government and Value		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]	62,525,000
Total short-term U.S. government and Value	[1]	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]	94,427,000
Total short-term U.S. government and Value	[1]	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]	29,399,000
Total short-term U.S. government and Value	[1]	29,387,240
ProShares UltraShort Bloomberg Commodity [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		7,518,119	4,233,548
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			877,000
Total short-term U.S. government and Value			876,727
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.002% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		618,000
Total short-term U.S. government and Value	[2]		617,990
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.022% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			151,000
Total short-term U.S. government and Value			150,997
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.020% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		457,000
Total short-term U.S. government and Value	[2]		456,988
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.039% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,131,000
Total short-term U.S. government and Value	[2]		2,130,846
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		1,033,000
Total short-term U.S. government and Value		1,032,956
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.225% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	3,653,000
Total short-term U.S. government and Value	[2]	3,652,297
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.143% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	2,834,000
Total short-term U.S. government and Value	[2]	2,832,866
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		79,692,642	131,594,608
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.023% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		8,064,000
Total short-term U.S. government and Value	[2]		8,063,792
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.073% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		2,920,000
Total short-term U.S. government and Value	[2]		2,919,290
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.072% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		21,246,000
Total short-term U.S. government and Value	[2]		21,239,228
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.030% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,784,000
Total short-term U.S. government and Value			2,783,134
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			7,520,000
Total short-term U.S. government and Value			7,519,981
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.010% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			8,188,000
Total short-term U.S. government and Value			8,187,864
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.014% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		4,424,000
Total short-term U.S. government and Value	[2]		4,423,899
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.024% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		3,423,000
Total short-term U.S. government and Value	[2]		3,422,909
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.021% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		7,534,000
Total short-term U.S. government and Value	[2]		7,533,711
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		8,635,000
Total short-term U.S. government and Value	[2]		8,634,376
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.044% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		27,059,000
Total short-term U.S. government and Value	[2]		27,055,452
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.064% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			25,974,000
Total short-term U.S. government and Value			25,969,714
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			3,842,000
Total short-term U.S. government and Value			3,841,258
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[3]	14,974,000
Total short-term U.S. government and Value	[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		3,329,000
Total short-term U.S. government and Value		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		21,612,000
Total short-term U.S. government and Value		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		5,980,000
Total short-term U.S. government and Value		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	[3]	5,106,000
Total short-term U.S. government and Value	[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		2,835,000
Total short-term U.S. government and Value		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	[3]	2,372,000
Total short-term U.S. government and Value	[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	[3]	14,653,000
Total short-term U.S. government and Value	[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	[3]	8,856,000
Total short-term U.S. government and Value	[3]	8,842,280
ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		8,115,004	8,672,710
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			790,000
Total short-term U.S. government and Value			789,897
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			3,398,000
Total short-term U.S. government and Value			3,397,439
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.021% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			717,000
Total short-term U.S. government and Value			716,981
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,190,000
Total short-term U.S. government and Value			1,189,914
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.010% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			129,000
Total short-term U.S. government and Value			128,997
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.035% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,093,000
Total short-term U.S. government and Value			2,092,596
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.073% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			357,000
Total short-term U.S. government and Value			356,886
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.233% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		814,000
Total short-term U.S. government and Value		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		1,294,000
Total short-term U.S. government and Value		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		6,017,000
Total short-term U.S. government and Value		6,007,679
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		72,979,905	84,040,107
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.023% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]		4,814,000
Total short-term U.S. government and Value	[4]		4,813,876
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.015% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			4,878,000
Total short-term U.S. government and Value			4,877,813
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]		995,000
Total short-term U.S. government and Value	[4]		994,998
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]		2,572,000
Total short-term U.S. government and Value	[4]		2,571,814
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]		2,641,000
Total short-term U.S. government and Value	[4]		2,640,490
ProShares UltraShort Gold [Member] | Us Treasury Bills 0.007% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			5,194,000
Total short-term U.S. government and Value			5,193,913
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.021% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]		7,310,000
Total short-term U.S. government and Value	[4]		7,309,833
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.017% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]		24,106,000
Total short-term U.S. government and Value	[4]		24,105,357
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.042% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]		6,386,000
Total short-term U.S. government and Value	[4]		6,385,163
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.056% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			25,151,000
Total short-term U.S. government and Value			25,146,850
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]	10,734,000
Total short-term U.S. government and Value	[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	[4]	4,806,000
Total short-term U.S. government and Value	[4]	4,804,987
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]	4,870,000
Total short-term U.S. government and Value	[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	[4]	10,805,000
Total short-term U.S. government and Value	[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	[4]	30,298,000
Total short-term U.S. government and Value	[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		6,940,000
Total short-term U.S. government and Value		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		1,742,000
Total short-term U.S. government and Value		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	[4]	500,000
Total short-term U.S. government and Value	[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	[4]	2,297,000
Total short-term U.S. government and Value	[4]	2,296,081
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		50,730,230	52,226,692
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		992,000
Total short-term U.S. government and Value	[5]		991,997
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,355,000
Total short-term U.S. government and Value			2,354,545
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.056% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		1,504,000
Total short-term U.S. government and Value	[5]		1,503,752
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.020% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		6,632,000
Total short-term U.S. government and Value	[5]		6,631,849
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.014% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		5,857,000
Total short-term U.S. government and Value	[5]		5,856,844
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.030% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		12,806,000
Total short-term U.S. government and Value	[5]		12,805,509
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.051% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		11,917,000
Total short-term U.S. government and Value	[5]		11,915,438
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		10,170,000
Total short-term U.S. government and Value	[5]		10,166,758
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]	4,001,000
Total short-term U.S. government and Value	[4]	4,000,567
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.055% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		1,000,000
Total short-term U.S. government and Value		999,913
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.386% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]	2,281,000
Total short-term U.S. government and Value	[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	[4]	8,744,000
Total short-term U.S. government and Value	[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		1,641,000
Total short-term U.S. government and Value		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	[4]	4,573,000
Total short-term U.S. government and Value	[4]	4,572,119
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.000% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[4]	1,982,000
Total short-term U.S. government and Value	[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	[4]	8,323,000
Total short-term U.S. government and Value	[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	[4]	18,199,000
Total short-term U.S. government and Value	[4]	18,191,721
ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		15,153,211	12,086,577
ProShares Short Euro [Member] | U.S. Treasury Bills 0.024% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			4,903,000
Total short-term U.S. government and Value			4,902,869
ProShares Short Euro [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,278,000
Total short-term U.S. government and Value			2,277,836
ProShares Short Euro [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,809,000
Total short-term U.S. government and Value			2,808,105
ProShares Short Euro [Member] | U.S. Treasury Bills 0.013% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			390,000
Total short-term U.S. government and Value			389,991
ProShares Short Euro [Member] | U.S. Treasury Bills 0.040% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,708,000
Total short-term U.S. government and Value			1,707,776
ProShares Short Euro [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		2,962,000
Total short-term U.S. government and Value		2,961,679
ProShares Short Euro [Member] | U.S. Treasury Bills 0.000% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		5,605,000
Total short-term U.S. government and Value		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		1,635,000
Total short-term U.S. government and Value		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		200,000
Total short-term U.S. government and Value		199,961
ProShares Short Euro [Member] | U.S. Treasury Bills 0.203% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		2,198,000
Total short-term U.S. government and Value		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		2,555,000
Total short-term U.S. government and Value		2,554,813
ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		18,408,894	20,267,679
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			351,000
Total short-term U.S. government and Value			350,954
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,006,000
Total short-term U.S. government and Value			2,005,376
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			756,000
Total short-term U.S. government and Value			755,946
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.010% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			735,000
Total short-term U.S. government and Value			734,983
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.035% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			854,000
Total short-term U.S. government and Value			853,835
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.012% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			15,300,000
Total short-term U.S. government and Value			15,299,592
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.021% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			267,000
Total short-term U.S. government and Value			266,993
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		415,000
Total short-term U.S. government and Value		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		2,538,000
Total short-term U.S. government and Value		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		1,267,000
Total short-term U.S. government and Value		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]	14,195,000
Total short-term U.S. government and Value	[1]	14,189,322
ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		546,166,776	487,111,117
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.015% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			12,133,000
Total short-term U.S. government and Value			12,132,535
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.022% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			8,135,000
Total short-term U.S. government and Value			8,134,815
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		2,717,000
Total short-term U.S. government and Value	[6]		2,716,804
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			67,461,000
Total short-term U.S. government and Value			67,447,976
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.011% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		37,647,000
Total short-term U.S. government and Value	[6]		37,646,372
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.010% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		69,601,000
Total short-term U.S. government and Value	[6]		69,599,144
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.027% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		58,406,000
Total short-term U.S. government and Value	[6]		58,404,491
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.048% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		57,015,000
Total short-term U.S. government and Value	[6]		57,007,525
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.070% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			6,919,000
Total short-term U.S. government and Value			6,917,316
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.082% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		112,157,000
Total short-term U.S. government and Value	[6]		112,121,250
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.090% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		55,000,000
Total short-term U.S. government and Value	[6]		54,982,889
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]	21,719,000
Total short-term U.S. government and Value	[6]	21,716,648
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		44,995,000
Total short-term U.S. government and Value		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		29,669,000
Total short-term U.S. government and Value		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		7,296,000
Total short-term U.S. government and Value		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	[6]	88,841,000
Total short-term U.S. government and Value	[6]	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	[6]	98,693,000
Total short-term U.S. government and Value	[6]	98,685,776
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.133% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		67,289,000
Total short-term U.S. government and Value		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	[6]	44,405,000
Total short-term U.S. government and Value	[6]	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	[6]	143,484,000
Total short-term U.S. government and Value	[6]	143,426,606
ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		259,997,001	532,957,746
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		22,696,000
Total short-term U.S. government and Value	[6]		22,693,024
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		49,440,000
Total short-term U.S. government and Value	[6]		49,424,619
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.063% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,002,000
Total short-term U.S. government and Value			1,001,835
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		81,110,000
Total short-term U.S. government and Value	[6]		81,104,142
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.017% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			32,686,000
Total short-term U.S. government and Value			32,685,510
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.019% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		92,533,000
Total short-term U.S. government and Value	[6]		92,530,892
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.027% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		19,439,000
Total short-term U.S. government and Value	[6]		19,438,482
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.026% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		164,216,000
Total short-term U.S. government and Value	[6]		164,211,758
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.014% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			51,533,000
Total short-term U.S. government and Value			51,531,025
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.070% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			18,340,000
Total short-term U.S. government and Value			18,336,459
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[7]	142,667,000
Total short-term U.S. government and Value	[6],[7]	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	[6],[7]	10,194,000
Total short-term U.S. government and Value	[6],[7]	10,178,208
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		8,000,000
Total short-term U.S. government and Value		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		9,617,000
Total short-term U.S. government and Value		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		4,417,000
Total short-term U.S. government and Value		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		5,361,000
Total short-term U.S. government and Value		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	[6],[7]	800,000
Total short-term U.S. government and Value	[6],[7]	799,846
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.148% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		6,017,000
Total short-term U.S. government and Value		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		6,089,000
Total short-term U.S. government and Value		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		38,515,000
Total short-term U.S. government and Value		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	[6],[7]	28,369,000
Total short-term U.S. government and Value	[6],[7]	28,357,652
ProShares Ultra Bloomberg Commodity [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		7,084,065	2,754,900
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			483,000
Total short-term U.S. government and Value			482,937
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		984,000
Total short-term U.S. government and Value	[2]		983,997
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.019% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		1,288,000
Total short-term U.S. government and Value	[2]		1,287,966
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	2,558,000
Total short-term U.S. government and Value	[2]	2,557,723
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.060% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	1,000,000
Total short-term U.S. government and Value	[2]	999,600
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.032% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	3,527,000
Total short-term U.S. government and Value	[2]	3,526,742
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		797,650,543	467,200,736
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		15,454,000
Total short-term U.S. government and Value	[2]		15,451,450
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.071% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		40,567,000
Total short-term U.S. government and Value	[2]		40,557,129
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.030% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,595,000
Total short-term U.S. government and Value			2,594,193
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.020% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		85,597,000
Total short-term U.S. government and Value	[2]		85,594,789
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.039% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		23,346,000
Total short-term U.S. government and Value	[2]		23,344,314
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			14,590,000
Total short-term U.S. government and Value			14,589,964
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.017% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			19,325,000
Total short-term U.S. government and Value			19,324,485
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.014% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			50,156,000
Total short-term U.S. government and Value			50,154,077
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.015% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			20,210,000
Total short-term U.S. government and Value			20,209,663
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.009% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			13,133,000
Total short-term U.S. government and Value			13,132,803
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.049% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		50,260,000
Total short-term U.S. government and Value	[2]		50,253,410
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.051% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		60,018,000
Total short-term U.S. government and Value	[2]		60,006,413
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.074% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]		72,011,000
Total short-term U.S. government and Value	[2]		71,988,046
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.087% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		55,485,000
Total short-term U.S. government and Value		55,484,817
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[2]	25,596,000
Total short-term U.S. government and Value	[2]	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		18,803,000
Total short-term U.S. government and Value		18,802,530
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.001% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		6,843,000
Total short-term U.S. government and Value		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	[2]	91,564,000
Total short-term U.S. government and Value	[2]	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		80,508,000
Total short-term U.S. government and Value		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	[2]	74,430,000
Total short-term U.S. government and Value	[2]	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	[2]	68,546,000
Total short-term U.S. government and Value	[2]	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	[2]	38,009,000
Total short-term U.S. government and Value	[2]	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	[2]	86,544,000
Total short-term U.S. government and Value	[2]	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	[2]	73,235,000
Total short-term U.S. government and Value	[2]	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	[2]	44,753,000
Total short-term U.S. government and Value	[2]	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	[2]	133,631,000
Total short-term U.S. government and Value	[2]	133,423,979
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		26,807,731	53,410,227
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			10,840,000
Total short-term U.S. government and Value			10,838,211
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.010% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,773,000
Total short-term U.S. government and Value			1,772,973
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.015% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,011,000
Total short-term U.S. government and Value			2,010,923
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			3,173,000
Total short-term U.S. government and Value			3,172,992
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.008% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,973,000
Total short-term U.S. government and Value			2,972,950
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.018% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,356,000
Total short-term U.S. government and Value			2,355,946
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.024% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			3,145,000
Total short-term U.S. government and Value			3,144,919
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.037% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			3,175,000
Total short-term U.S. government and Value			3,174,771
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.054% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			9,743,000
Total short-term U.S. government and Value			9,741,723
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.056% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			5,588,000
Total short-term U.S. government and Value			5,586,921
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.060% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			8,640,000
Total short-term U.S. government and Value			8,637,898
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		861,000
Total short-term U.S. government and Value		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		588,000
Total short-term U.S. government and Value		587,936
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.035% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		1,316,000
Total short-term U.S. government and Value		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		1,137,000
Total short-term U.S. government and Value		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		1,823,000
Total short-term U.S. government and Value		1,822,616
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.151% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		3,234,000
Total short-term U.S. government and Value		3,233,497
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.186% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		17,857,000
Total short-term U.S. government and Value		17,849,857
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		71,912,587	101,927,857
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.010% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		2,843,000
Total short-term U.S. government and Value	[5]		2,842,957
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		13,004,000
Total short-term U.S. government and Value	[5]		13,003,967
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			3,373,000
Total short-term U.S. government and Value			3,372,349
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		16,428,000
Total short-term U.S. government and Value	[5]		16,422,764
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.010% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		17,175,000
Total short-term U.S. government and Value	[5]		17,174,542
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.045% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		11,287,000
Total short-term U.S. government and Value	[5]		11,285,520
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.057% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		37,832,000
Total short-term U.S. government and Value	[5]		37,825,758
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		2,659,000
Total short-term U.S. government and Value		2,658,712
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		22,780,000
Total short-term U.S. government and Value		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	[4]	7,749,000
Total short-term U.S. government and Value	[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	[4]	7,778,000
Total short-term U.S. government and Value	[4]	7,777,974
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.110% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		9,751,000
Total short-term U.S. government and Value		9,750,155
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.000% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		1,484,000
Total short-term U.S. government and Value		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		1,450,000
Total short-term U.S. government and Value		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	[4]	18,286,000
Total short-term U.S. government and Value	[4]	18,278,686
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		238,899,626	305,474,211
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.011% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		92,778,000
Total short-term U.S. government and Value	[5]		92,775,887
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		6,604,000
Total short-term U.S. government and Value	[5]		6,603,134
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		18,037,000
Total short-term U.S. government and Value	[5]		18,035,697
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		4,277,000
Total short-term U.S. government and Value	[5]		4,275,637
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.090% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		45,017,000
Total short-term U.S. government and Value	[5]		45,002,995
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.016% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			2,309,000
Total short-term U.S. government and Value			2,308,961
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.012% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			14,382,000
Total short-term U.S. government and Value			14,381,784
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.020% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		35,850,000
Total short-term U.S. government and Value	[5]		35,849,044
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.012% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		9,368,000
Total short-term U.S. government and Value	[5]		9,367,758
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.060% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]		76,886,000
Total short-term U.S. government and Value	[5]		76,873,314
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]	41,656,000
Total short-term U.S. government and Value	[5]	41,651,489
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		2,873,000
Total short-term U.S. government and Value		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	[5]	19,913,000
Total short-term U.S. government and Value	[5]	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		17,050,000
Total short-term U.S. government and Value		17,049,574
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.001% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]	34,041,000
Total short-term U.S. government and Value	[5]	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	[5]	20,284,000
Total short-term U.S. government and Value	[5]	20,252,576
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.039% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[5]	29,869,000
Total short-term U.S. government and Value	[5]	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		2,811,000
Total short-term U.S. government and Value		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	[5]	40,444,000
Total short-term U.S. government and Value	[5]	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	[5]	30,018,000
Total short-term U.S. government and Value	[5]	30,005,993
ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		11,605,262	2,415,698
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			242,000
Total short-term U.S. government and Value			241,983
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		587,000
Total short-term U.S. government and Value	[6]		586,923
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.010% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			245,000
Total short-term U.S. government and Value			244,994
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.035% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			1,000,000
Total short-term U.S. government and Value			999,807
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.021% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]		342,000
Total short-term U.S. government and Value	[6]		341,991
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]	7,404,000
Total short-term U.S. government and Value	[6]	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		790,000
Total short-term U.S. government and Value		789,942
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.166% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]	3,413,000
Total short-term U.S. government and Value	[6]	3,411,635
ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Total short-term U.S. government and Value		5,069,491	1,287,869
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Principal Amount			931,000
Total short-term U.S. government and Value			930,878
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.021% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6],[8]		357,000
Total short-term U.S. government and Value	[6],[8]		$ 356,991
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Principal Amount	[6]	3,811,000
Total short-term U.S. government and Value	[6]	5,069,491
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		360,000
Total short-term U.S. government and Value		359,961
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Principal Amount		899,000
Total short-term U.S. government and Value		$ 898,860
[1]	All or partial amount pledged as collateral for futures contracts.
[2]	All or partial amount pledged as collateral for swap agreements.
[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 forward agreements.
[6]	All or partial amount segregated as collateral for foreign currency forward contracts.
[7]	All or partial amount segregated as collateral for foreign currency forward contracts
[8]	All or partial amount pledged as collateral for foreign currency forward contracts.

Schedule of Investments - Sho27

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, cost		$ 3,313,585,456	$ 3,005,824,301
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		91.00%	74.00%
Total short-term U.S. government and agency obligations, cost		$ 96,075,481	$ 82,086,464
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.033% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.033%
Debt instrument, maturity date			Jan. 8, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.00%
Debt instrument, maturity date			Jan. 22, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.00%
Debt instrument, maturity date			Jan. 29, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.011% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.011%
Debt instrument, maturity date			Feb. 12, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.018%
Debt instrument, maturity date			Feb. 19, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.023% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.023%
Debt instrument, maturity date			Mar. 5, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.036%
Debt instrument, maturity date			Apr. 16, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.056%
Debt instrument, maturity date			Apr. 30, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.061%
Debt instrument, maturity date			May 14, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.028% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.028%
Debt instrument, maturity date			May 21, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.071% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.071%
Debt instrument, maturity date			May 28, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.087%
Debt instrument, maturity date			Jun. 11, 2015
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.087% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.087%
Debt instrument, maturity date		Jan. 7, 2016
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.165%
Debt instrument, maturity date		Jan. 28, 2016
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.007% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.007%
Debt instrument, maturity date		Feb. 4, 2016
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Feb. 25, 2016
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.190% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.19%
Debt instrument, maturity date		Mar. 3, 2016
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.070% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.07%
Debt instrument, maturity date		Mar. 10, 2016
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.201% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.201%
Debt instrument, maturity date	[1]	Mar. 17, 2016
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.060% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.06%
Debt instrument, maturity date	[1]	Mar. 24, 2016
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.366% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.366%
Debt instrument, maturity date	[1]	May 26, 2016
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		94.00%	112.00%
Total short-term U.S. government and agency obligations, cost		$ 25,975,462	$ 24,104,754
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.071% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.071%
Debt instrument, maturity date			May 28, 2015
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.087%
Debt instrument, maturity date			Jun. 11, 2015
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.012% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.012%
Debt instrument, maturity date			Jan. 22, 2015
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.012% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.012%
Debt instrument, maturity date			Feb. 12, 2015
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.025% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.025%
Debt instrument, maturity date			Mar. 5, 2015
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.043%
Debt instrument, maturity date			Apr. 16, 2015
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.047%
Debt instrument, maturity date			Apr. 30, 2015
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Feb. 25, 2016
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.019% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.019%
Debt instrument, maturity date		Feb. 4, 2016
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.209% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.209%
Debt instrument, maturity date	[1]	Mar. 3, 2016
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		83.00%	88.00%
Total short-term U.S. government and agency obligations, cost		$ 535,381,199	$ 446,972,637
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.043%
Debt instrument, maturity date			Apr. 16, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.040% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.04%
Debt instrument, maturity date			Jan. 8, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.006% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.006%
Debt instrument, maturity date			Jan. 22, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.010% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.01%
Debt instrument, maturity date			Jan. 29, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.021% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.021%
Debt instrument, maturity date			Feb. 19, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.019% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.019%
Debt instrument, maturity date			Mar. 5, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.016% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.016%
Debt instrument, maturity date			Mar. 12, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.063% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.063%
Debt instrument, maturity date			May 14, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.066% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.066%
Debt instrument, maturity date			May 21, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.073% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.073%
Debt instrument, maturity date			May 28, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.072% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.072%
Debt instrument, maturity date			Jun. 4, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.030% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.03%
Debt instrument, maturity date			Jun. 11, 2015
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.165%
Debt instrument, maturity date		Jan. 28, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Feb. 25, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.065% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.065%
Debt instrument, maturity date		Jan. 7, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.053% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.053%
Debt instrument, maturity date		Jan. 14, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Jan. 21, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.035% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.035%
Debt instrument, maturity date		Feb. 4, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.036%
Debt instrument, maturity date		Feb. 11, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.208%
Debt instrument, maturity date		Mar. 3, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.194% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.194%
Debt instrument, maturity date		Mar. 17, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.206% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.206%
Debt instrument, maturity date		Mar. 24, 2016
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.364% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.364%
Debt instrument, maturity date	[1]	May 26, 2016
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		80.00%	52.00%
Total short-term U.S. government and agency obligations, cost		$ 438,333,277	$ 182,641,263
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.033% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.033%
Debt instrument, maturity date			Jan. 8, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.036%
Debt instrument, maturity date			Apr. 16, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.061%
Debt instrument, maturity date			May 14, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.012% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.012%
Debt instrument, maturity date			Feb. 12, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.010% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.01%
Debt instrument, maturity date			Jan. 29, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.021% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.021%
Debt instrument, maturity date			Feb. 19, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.030% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.03%
Debt instrument, maturity date			Jun. 11, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.009% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.009%
Debt instrument, maturity date			Jan. 22, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.014% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.014%
Debt instrument, maturity date			Mar. 5, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.015%
Debt instrument, maturity date			Mar. 12, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.026% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.026%
Debt instrument, maturity date			May 21, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.049% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.049%
Debt instrument, maturity date			May 28, 2015
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.366% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.366%
Debt instrument, maturity date	[1]	May 26, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Jan. 21, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Jan. 7, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.000% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Jan. 14, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.055% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.055%
Debt instrument, maturity date		Jan. 28, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.130% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.13%
Debt instrument, maturity date		Feb. 4, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.150% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.15%
Debt instrument, maturity date		Feb. 11, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.129% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.129%
Debt instrument, maturity date		Feb. 18, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.125% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.125%
Debt instrument, maturity date		Feb. 25, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.181% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.181%
Debt instrument, maturity date		Mar. 3, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.066% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.066%
Debt instrument, maturity date	[1]	Mar. 10, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.207% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.207%
Debt instrument, maturity date	[1]	Mar. 17, 2016
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.101% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.101%
Debt instrument, maturity date	[1]	Mar. 24, 2016
ProShares UltraShort Bloomberg Commodity [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		88.00%	80.00%
Total short-term U.S. government and agency obligations, cost		$ 7,517,328	$ 4,233,396
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.087%
Debt instrument, maturity date			Jun. 11, 2015
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.002% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.002%
Debt instrument, maturity date	[2]		Jan. 22, 2015
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.022% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.022%
Debt instrument, maturity date			Feb. 12, 2015
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.020% Due 03/05/15 [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]		Mar. 5, 2015
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.039% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.039%
Debt instrument, maturity date	[2]		Apr. 16, 2015
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Jan. 21, 2016
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.225% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.225%
Debt instrument, maturity date	[2],[3]	Mar. 17, 2016
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.143% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.143%
Debt instrument, maturity date	[2],[3]	Mar. 24, 2016
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		83.00%	78.00%
Total short-term U.S. government and agency obligations, cost		$ 79,694,797	$ 131,592,367
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.023% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.023%
Debt instrument, maturity date	[2]		Mar. 5, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.073% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.073%
Debt instrument, maturity date			May 28, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.072% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.072%
Debt instrument, maturity date			Jun. 4, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.030% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.03%
Debt instrument, maturity date			Jun. 11, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.051%
Debt instrument, maturity date			Jan. 8, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.010% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.01%
Debt instrument, maturity date			Jan. 22, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.014% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.014%
Debt instrument, maturity date	[2]		Feb. 12, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.024% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.024%
Debt instrument, maturity date	[2]		Feb. 19, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.021% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.021%
Debt instrument, maturity date	[2]		Mar. 12, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.041%
Debt instrument, maturity date	[2]		Apr. 16, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.044% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.044%
Debt instrument, maturity date	[2]		Apr. 30, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.064% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.064%
Debt instrument, maturity date			May 14, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.061%
Debt instrument, maturity date			May 21, 2015
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[4]	0.00%
Debt instrument, maturity date	[4]	Feb. 25, 2016
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.080% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.08%
Debt instrument, maturity date		Jan. 7, 2016
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.020% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.02%
Debt instrument, maturity date		Jan. 21, 2016
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.026% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.026%
Debt instrument, maturity date		Feb. 4, 2016
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.180% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[4]	0.18%
Debt instrument, maturity date	[4]	Feb. 18, 2016
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.20%
Debt instrument, maturity date		Mar. 10, 2016
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.172% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[4]	0.172%
Debt instrument, maturity date	[4]	Mar. 17, 2016
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.176% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[4]	0.176%
Debt instrument, maturity date	[4]	Mar. 24, 2016
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[4]	0.353%
Debt instrument, maturity date	[4]	May 26, 2016
ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		78.00%	59.00%
Total short-term U.S. government and agency obligations, cost		$ 8,114,653	$ 8,672,527
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.056%
Debt instrument, maturity date			Apr. 30, 2015
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.061%
Debt instrument, maturity date			May 14, 2015
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.021% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.021%
Debt instrument, maturity date			Feb. 19, 2015
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.041%
Debt instrument, maturity date			Apr. 16, 2015
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.010% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.01%
Debt instrument, maturity date			Feb. 12, 2015
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.035% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.035%
Debt instrument, maturity date			May 21, 2015
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.073% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.073%
Debt instrument, maturity date			Jun. 4, 2015
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.233% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.233%
Debt instrument, maturity date		Mar. 17, 2016
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.185% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.185%
Debt instrument, maturity date		Mar. 24, 2016
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.386% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.386%
Debt instrument, maturity date		May 26, 2016
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		97.00%	103.00%
Total short-term U.S. government and agency obligations, cost		$ 72,981,653	$ 84,038,905
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.023% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.023%
Debt instrument, maturity date	[5]		Mar. 5, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.015% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.015%
Debt instrument, maturity date			Mar. 12, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.051%
Debt instrument, maturity date	[5]		Jan. 8, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.041%
Debt instrument, maturity date	[5]		Apr. 16, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.061%
Debt instrument, maturity date	[5]		May 21, 2015
ProShares UltraShort Gold [Member] | Us Treasury Bills 0.007% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.007%
Debt instrument, maturity date			Jan. 22, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.021% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.021%
Debt instrument, maturity date	[5]		Feb. 12, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.017% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.017%
Debt instrument, maturity date	[5]		Feb. 19, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.042% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.042%
Debt instrument, maturity date	[5]		Apr. 30, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.056% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.056%
Debt instrument, maturity date			May 14, 2015
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.00%
Debt instrument, maturity date	[6]	Feb. 25, 2016
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.070% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.07%
Debt instrument, maturity date		Mar. 10, 2016
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.353%
Debt instrument, maturity date	[6]	May 26, 2016
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.135% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.135%
Debt instrument, maturity date	[6]	Jan. 7, 2016
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.040% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.04%
Debt instrument, maturity date	[6]	Jan. 14, 2016
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.043% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.043%
Debt instrument, maturity date		Jan. 21, 2016
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.210% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.21%
Debt instrument, maturity date		Mar. 3, 2016
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.181% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.181%
Debt instrument, maturity date	[6]	Mar. 17, 2016
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.203% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.203%
Debt instrument, maturity date	[6]	Mar. 24, 2016
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		91.00%	99.00%
Total short-term U.S. government and agency obligations, cost		$ 50,730,044	$ 52,225,712
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.051%
Debt instrument, maturity date	[5]		Jan. 8, 2015
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.061%
Debt instrument, maturity date			May 21, 2015
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.056% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.056%
Debt instrument, maturity date	[5]		May 14, 2015
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.020% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.02%
Debt instrument, maturity date	[5]		Feb. 12, 2015
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.014% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.014%
Debt instrument, maturity date	[5]		Feb. 19, 2015
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.030% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.03%
Debt instrument, maturity date	[5]		Mar. 12, 2015
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.051% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.051%
Debt instrument, maturity date	[5]		Apr. 30, 2015
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.078%
Debt instrument, maturity date	[5]		Jun. 4, 2015
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.00%
Debt instrument, maturity date	[6]	Feb. 25, 2016
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.055% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.055%
Debt instrument, maturity date		Jan. 28, 2016
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.386% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.386%
Debt instrument, maturity date	[6]	May 26, 2016
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.135% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.135%
Debt instrument, maturity date	[6]	Jan. 7, 2016
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.043% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.043%
Debt instrument, maturity date		Jan. 21, 2016
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.181% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.181%
Debt instrument, maturity date	[6]	Mar. 17, 2016
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.000% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.00%
Debt instrument, maturity date	[6]	Feb. 11, 2016
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.138% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.138%
Debt instrument, maturity date	[6]	Feb. 18, 2016
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.163% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.163%
Debt instrument, maturity date	[6]	Mar. 24, 2016
ProShares Short Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		87.00%	86.00%
Total short-term U.S. government and agency obligations, cost		$ 15,153,202	$ 12,086,398
ProShares Short Euro [Member] | U.S. Treasury Bills 0.024% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.024%
Debt instrument, maturity date			Feb. 19, 2015
ProShares Short Euro [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.041%
Debt instrument, maturity date			Apr. 16, 2015
ProShares Short Euro [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.078%
Debt instrument, maturity date			Jun. 4, 2015
ProShares Short Euro [Member] | U.S. Treasury Bills 0.013% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.013%
Debt instrument, maturity date			Feb. 12, 2015
ProShares Short Euro [Member] | U.S. Treasury Bills 0.040% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.04%
Debt instrument, maturity date			Apr. 30, 2015
ProShares Short Euro [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Feb. 25, 2016
ProShares Short Euro [Member] | U.S. Treasury Bills 0.000% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Jan. 7, 2016
ProShares Short Euro [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.20%
Debt instrument, maturity date		Mar. 10, 2016
ProShares Short Euro [Member] | U.S. Treasury Bills 0.181% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.181%
Debt instrument, maturity date		Mar. 17, 2016
ProShares Short Euro [Member] | U.S. Treasury Bills 0.203% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.203%
Debt instrument, maturity date		Mar. 24, 2016
ProShares Short Euro [Member] | U.S. Treasury Bills 0.027% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.027%
Debt instrument, maturity date		Feb. 4, 2016
ProShares UltraShort Australian Dollar [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		90.00%	88.00%
Total short-term U.S. government and agency obligations, cost		$ 18,409,449	$ 20,267,681
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.056%
Debt instrument, maturity date			Apr. 30, 2015
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.087%
Debt instrument, maturity date			Jun. 11, 2015
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.043%
Debt instrument, maturity date			Apr. 16, 2015
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.010% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.01%
Debt instrument, maturity date			Feb. 12, 2015
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.035% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.035%
Debt instrument, maturity date			May 21, 2015
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.012% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.012%
Debt instrument, maturity date			Feb. 19, 2015
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.021% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.021%
Debt instrument, maturity date			Mar. 5, 2015
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Feb. 25, 2016
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.048% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.048%
Debt instrument, maturity date		Feb. 4, 2016
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.151% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.151%
Debt instrument, maturity date		Mar. 3, 2016
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.156% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[1]	0.156%
Debt instrument, maturity date	[1]	Mar. 24, 2016
ProShares UltraShort Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		105.00%	94.00%
Total short-term U.S. government and agency obligations, cost		$ 546,177,230	$ 487,097,789
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.015% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.015%
Debt instrument, maturity date			Mar. 12, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.022% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.022%
Debt instrument, maturity date			Feb. 12, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.041%
Debt instrument, maturity date	[7]		Apr. 16, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.061%
Debt instrument, maturity date			May 21, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.011% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.011%
Debt instrument, maturity date	[7]		Jan. 22, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.010% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.01%
Debt instrument, maturity date	[7]		Feb. 19, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.027% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.027%
Debt instrument, maturity date	[7]		Mar. 5, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.048% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.048%
Debt instrument, maturity date	[7]		Apr. 30, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.070% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.07%
Debt instrument, maturity date			May 28, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.082% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.082%
Debt instrument, maturity date	[7]		Jun. 4, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.090% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.09%
Debt instrument, maturity date	[7]		Jun. 11, 2015
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [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
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Jan. 21, 2016
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.150% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.15%
Debt instrument, maturity date		Feb. 11, 2016
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.180% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.18%
Debt instrument, maturity date		Feb. 18, 2016
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.353%
Debt instrument, maturity date	[7]	May 26, 2016
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.027% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.027%
Debt instrument, maturity date	[7]	Feb. 4, 2016
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.133% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.133%
Debt instrument, maturity date		Jan. 28, 2016
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.167% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.167%
Debt instrument, maturity date	[7]	Mar. 3, 2016
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.175% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.175%
Debt instrument, maturity date	[7]	Mar. 24, 2016
ProShares UltraShort Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		110.00%	100.00%
Total short-term U.S. government and agency obligations, cost		$ 260,014,650	$ 532,944,509
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.056%
Debt instrument, maturity date	[7]		Apr. 30, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.087%
Debt instrument, maturity date	[7]		Jun. 11, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.063% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.063%
Debt instrument, maturity date			May 14, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.041%
Debt instrument, maturity date	[7]		Apr. 16, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.017% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.017%
Debt instrument, maturity date			Jan. 29, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.019% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.019%
Debt instrument, maturity date	[7]		Feb. 12, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.027% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.027%
Debt instrument, maturity date	[7]		Feb. 19, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.026% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.026%
Debt instrument, maturity date	[7]		Mar. 5, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.014% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.014%
Debt instrument, maturity date			Mar. 12, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.070% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.07%
Debt instrument, maturity date			May 21, 2015
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [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
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.366% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.366%
Debt instrument, maturity date	[7]	May 26, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.208%
Debt instrument, maturity date		Mar. 3, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.150% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.15%
Debt instrument, maturity date		Feb. 11, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.080% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.08%
Debt instrument, maturity date		Jan. 7, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.043% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.043%
Debt instrument, maturity date		Jan. 21, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.181% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.181%
Debt instrument, maturity date	[7]	Mar. 17, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.148% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.148%
Debt instrument, maturity date		Jan. 14, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.110% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.11%
Debt instrument, maturity date		Jan. 28, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.013% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.013%
Debt instrument, maturity date		Feb. 4, 2016
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.152% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.152%
Debt instrument, maturity date	[7]	Mar. 24, 2016
ProShares Ultra Bloomberg Commodity [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		100.00%	106.00%
Total short-term U.S. government and agency obligations, cost		$ 7,084,754	$ 2,754,883
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.047%
Debt instrument, maturity date			Apr. 30, 2015
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.051%
Debt instrument, maturity date	[2]		Jan. 8, 2015
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.019% Due 02/19/15 [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. 19, 2015
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [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
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.060% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.06%
Debt instrument, maturity date	[2]	Mar. 24, 2016
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.032% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.032%
Debt instrument, maturity date	[2]	Feb. 4, 2016
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		102.00%	104.00%
Total short-term U.S. government and agency obligations, cost		$ 797,652,302	$ 467,195,638
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.061%
Debt instrument, maturity date	[2]		May 14, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.071% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.071%
Debt instrument, maturity date	[2]		May 28, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.030% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.03%
Debt instrument, maturity date			Jun. 11, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.020% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.02%
Debt instrument, maturity date			Mar. 5, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.039% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.039%
Debt instrument, maturity date	[2]		Apr. 16, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.051%
Debt instrument, maturity date			Jan. 8, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.017% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.017%
Debt instrument, maturity date			Feb. 19, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.014% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.014%
Debt instrument, maturity date			Mar. 12, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.015% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.015%
Debt instrument, maturity date			Jan. 22, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.009% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.009%
Debt instrument, maturity date			Jan. 29, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.049% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.049%
Debt instrument, maturity date	[2]		Apr. 30, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.051% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.051%
Debt instrument, maturity date	[2]		May 21, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.074% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]		0.074%
Debt instrument, maturity date	[2]		Jun. 4, 2015
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.087% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.087%
Debt instrument, maturity date		Jan. 7, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [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
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.040% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.04%
Debt instrument, maturity date		Jan. 14, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.001% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.001%
Debt instrument, maturity date		Jan. 21, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.094% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.094%
Debt instrument, maturity date	[2]	Jan. 28, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.025% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.025%
Debt instrument, maturity date		Feb. 4, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.005% Due 02/11/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.005%
Debt instrument, maturity date	[2]	Feb. 11, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.119% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.119%
Debt instrument, maturity date	[2]	Feb. 18, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.013% Due 02/25/16 [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. 25, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.202% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.202%
Debt instrument, maturity date	[2]	Mar. 3, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.147% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.147%
Debt instrument, maturity date	[2]	Mar. 17, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.178% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.178%
Debt instrument, maturity date	[2]	Mar. 24, 2016
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.356% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[2]	0.356%
Debt instrument, maturity date	[2]	May 26, 2016
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		69.00%	76.00%
Total short-term U.S. government and agency obligations, cost		$ 26,806,648	$ 53,408,848
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.061%
Debt instrument, maturity date			May 14, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.010% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.01%
Debt instrument, maturity date			Jan. 29, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.015% Due 03/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.015%
Debt instrument, maturity date			Mar. 12, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.051%
Debt instrument, maturity date			Jan. 8, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.008% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.008%
Debt instrument, maturity date			Jan. 22, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.018% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.018%
Debt instrument, maturity date			Feb. 12, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.024% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.024%
Debt instrument, maturity date			Mar. 5, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.037% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.037%
Debt instrument, maturity date			Apr. 16, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.054% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.054%
Debt instrument, maturity date			Apr. 30, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.056% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.056%
Debt instrument, maturity date			May 21, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.060% Due 05/28/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.06%
Debt instrument, maturity date			May 28, 2015
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.165%
Debt instrument, maturity date		Jan. 28, 2016
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Feb. 25, 2016
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.035% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.035%
Debt instrument, maturity date		Feb. 4, 2016
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.080% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.08%
Debt instrument, maturity date		Jan. 7, 2016
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.20%
Debt instrument, maturity date		Mar. 10, 2016
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.151% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.151%
Debt instrument, maturity date		Mar. 3, 2016
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.186% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.186%
Debt instrument, maturity date		Mar. 24, 2016
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		103.00%	100.00%
Total short-term U.S. government and agency obligations, cost		$ 71,908,280	$ 101,925,636
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.010% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.01%
Debt instrument, maturity date	[5]		Jan. 29, 2015
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.051% Due 01/08/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.051%
Debt instrument, maturity date	[5]		Jan. 8, 2015
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.061%
Debt instrument, maturity date			May 21, 2015
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.078%
Debt instrument, maturity date	[5]		Jun. 4, 2015
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.010% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.01%
Debt instrument, maturity date	[5]		Feb. 19, 2015
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.045% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.045%
Debt instrument, maturity date	[5]		Apr. 30, 2015
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.057% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.057%
Debt instrument, maturity date	[5]		May 14, 2015
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.00%
Debt instrument, maturity date	[6]	Feb. 25, 2016
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.208%
Debt instrument, maturity date		Mar. 3, 2016
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.353% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.353%
Debt instrument, maturity date	[6]	May 26, 2016
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.135% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.135%
Debt instrument, maturity date	[6]	Jan. 7, 2016
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.110% Due 01/28/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.11%
Debt instrument, maturity date		Jan. 28, 2016
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.000% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.00%
Debt instrument, maturity date	[6]	Feb. 4, 2016
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.240% Due 03/17/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.24%
Debt instrument, maturity date		Mar. 17, 2016
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.184% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[6]	0.184%
Debt instrument, maturity date	[6]	Mar. 24, 2016
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		110.00%	105.00%
Total short-term U.S. government and agency obligations, cost		$ 238,900,176	$ 305,465,636
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.011% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.011%
Debt instrument, maturity date	[5]		Feb. 12, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.047%
Debt instrument, maturity date	[5]		Apr. 30, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.041%
Debt instrument, maturity date	[5]		Apr. 16, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.078%
Debt instrument, maturity date	[5]		Jun. 4, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.090% Due 06/11/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.09%
Debt instrument, maturity date	[5]		Jun. 11, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.016% Due 01/22/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.016%
Debt instrument, maturity date			Jan. 22, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.012% Due 01/29/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.012%
Debt instrument, maturity date			Jan. 29, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.020% Due 02/19/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.02%
Debt instrument, maturity date	[5]		Feb. 19, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.012% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.012%
Debt instrument, maturity date	[5]		Mar. 5, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.060% Due 05/14/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]		0.06%
Debt instrument, maturity date	[5]		May 14, 2015
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.00%
Debt instrument, maturity date	[5]	Feb. 25, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.200% Due 03/10/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.20%
Debt instrument, maturity date		Mar. 10, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.135% Due 01/07/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.135%
Debt instrument, maturity date	[5]	Jan. 7, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.040% Due 01/14/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.04%
Debt instrument, maturity date		Jan. 14, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.001% Due 01/21/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.001%
Debt instrument, maturity date	[5]	Jan. 21, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.356% Due 05/26/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.356%
Debt instrument, maturity date	[5]	May 26, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.039% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.039%
Debt instrument, maturity date	[5]	Feb. 4, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.115% Due 02/18/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.115%
Debt instrument, maturity date		Feb. 18, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.199% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.199%
Debt instrument, maturity date	[5]	Mar. 3, 2016
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.180% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[5]	0.18%
Debt instrument, maturity date	[5]	Mar. 24, 2016
ProShares Ultra Euro [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		107.00%	81.00%
Total short-term U.S. government and agency obligations, cost		$ 11,605,665	$ 2,415,732
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.036%
Debt instrument, maturity date			Apr. 16, 2015
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.047%
Debt instrument, maturity date	[7]		Apr. 30, 2015
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.010% Due 02/12/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.01%
Debt instrument, maturity date			Feb. 12, 2015
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.035% Due 05/21/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.035%
Debt instrument, maturity date			May 21, 2015
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.021% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]		0.021%
Debt instrument, maturity date	[7]		Mar. 5, 2015
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.000% Due 01/21/16 [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		Jan. 21, 2016
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.035% Due 02/04/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.035%
Debt instrument, maturity date		Feb. 4, 2016
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.166% Due 03/24/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[7]	0.166%
Debt instrument, maturity date	[7]	Mar. 24, 2016
ProShares Ultra Yen [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		93.00%	61.00%
Total short-term U.S. government and agency obligations, cost		$ 5,069,206	$ 1,287,844
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity			0.047%
Debt instrument, maturity date			Apr. 30, 2015
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.021% Due 03/05/15 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	[8]		0.021%
Debt instrument, maturity date	[8]		Mar. 5, 2015
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.165% Due 01/28/16 [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
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.000% Due 02/25/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.00%
Debt instrument, maturity date		Feb. 25, 2016
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.208% Due 03/03/16 [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		0.208%
Debt instrument, maturity date		Mar. 3, 2016
[1]	All or partial amount pledged as collateral for futures contracts.
[2]	All or partial amount pledged as collateral for swap agreements.
[3]	Cash collateral in the amount of $980,750 was pledged to cover margin requirements for open futures contracts as of December 31, 2015.
[4]	All or partial amount pledged as collateral for swap agreements and/or futures contracts.
[5]	All or partial amount pledged as collateral for forward agreements.
[6]	All or partial amount pledged as collateral for forward agreements and/or futures contracts.
[7]	All or partial amount segregated as collateral for foreign currency forward contracts.
[8]	All or partial amount pledged as collateral for foreign currency forward contracts.

Schedule of Investments - Fut28

Schedule of Investments - Futures Contracts Purchased (Parenthetical) (Detail) - Futures Contracts Purchased [Member] - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 5,888,545	$ 18,439,750
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	980,750	1,906,950
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	62,348,600	116,907,700
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	47,571,810	34,605,120
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	7,595,280	21,134,080
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	8,250	8,800
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 17,160	$ 14,300

Schedule of Investments - Swap

Schedule of Investments - Swap Agreements (Detail) - Swap Agreements [Member] - USD ($)		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014
ProShares UltraShort Bloomberg Commodity [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 171,324	[1]	$ 567,259	[2]
ProShares UltraShort Bloomberg Commodity [Member] | Swap Agreement with Deutsche Bank AG Based on Bloomberg Commodity Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		0.25%	[1],[3]	0.25%	[2],[4]
Termination Date		Jan. 6, 2016	[1]	Jan. 6, 2015	[2]
Notional Amount at Value		$ (7,650,954)	[1],[5]	$ (4,847,743)	[2],[6]
Unrealized Appreciation (Depreciation)		$ 84,161	[1]	$ 243,474	[2]
ProShares UltraShort Bloomberg Commodity [Member] | Swap Agreement with Goldman Sachs International Based on Bloomberg Commodity Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		0.25%	[1],[3]	0.25%	[2],[4]
Termination Date		Jan. 6, 2016	[1]	Jan. 6, 2015	[2]
Notional Amount at Value		$ (4,813,083)	[1],[5]	$ (4,242,243)	[2],[6]
Unrealized Appreciation (Depreciation)		$ 36,878	[1]	$ 240,271	[2]
ProShares UltraShort Bloomberg Commodity [Member] | Swap Agreement with UBS AG Based on Bloomberg Commodity Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		0.60%	[1],[3]	0.60%	[2],[4]
Termination Date		Jan. 6, 2016	[1]	Jan. 6, 2015	[2]
Notional Amount at Value		$ (2,647,863)	[1],[5]	$ (1,460,197)	[2],[6]
Unrealized Appreciation (Depreciation)		$ 103,452	[1]	83,514	[2]
ProShares UltraShort Bloomberg Commodity [Member] | Swap Agreement with Citibank N.A. Based on Bloomberg Commodity Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[3]	0.18%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[5]	$ (1,923,025)
Unrealized Appreciation (Depreciation)	[1]	(53,167)
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 6,412,656	[1]	$ 27,018,077	[2]
ProShares UltraShort 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],[4]			0.25%
Termination Date	[2]			Jan. 6, 2015
Notional Amount at Value	[2],[6]			$ (66,394,305)
Unrealized Appreciation (Depreciation)	[2]			$ 7,669,493
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)	[2],[4]			0.25%
Termination Date	[2]			Jan. 6, 2015
Notional Amount at Value	[2],[6]			$ (57,892,826)
Unrealized Appreciation (Depreciation)	[2]			$ 8,362,336
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)	[2],[4]			0.25%
Termination Date	[2]			Jan. 6, 2015
Notional Amount at Value	[2],[6]			$ (21,413,784)
Unrealized Appreciation (Depreciation)	[2]			$ 2,132,657
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)	[2],[4]			0.25%
Termination Date	[2]			Jan. 6, 2015
Notional Amount at Value	[2],[6]			$ (54,735,210)
Unrealized Appreciation (Depreciation)	[2]			8,853,591
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)	[1],[3]	0.18%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ (19,234,533)
Unrealized Appreciation (Depreciation)	[1]	$ 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)	[1],[3]	0.25%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ (29,881,854)
Unrealized Appreciation (Depreciation)	[1]	$ 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)	[1],[3]	0.25%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ (17,799,590)
Unrealized Appreciation (Depreciation)	[1]	$ 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)	[1],[3]	0.25%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ (8,303,436)
Unrealized Appreciation (Depreciation)	[1]	$ 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)	[1],[3]	0.25%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ (26,258,293)
Unrealized Appreciation (Depreciation)	[1]	$ 1,474,790
ProShares Ultra Bloomberg Commodity [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)	[2]			$ (331,338)
ProShares Ultra Bloomberg Commodity [Member] | Swap Agreement with Deutsche Bank AG Based on Bloomberg Commodity Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		0.25%	[1],[3]	0.25%	[2],[4]
Termination Date		Jan. 6, 2016	[1]	Jan. 6, 2015	[2]
Notional Amount at Value	[6]	$ 6,571,903	[1]	$ 2,207,567	[2]
Unrealized Appreciation (Depreciation)		$ (82,976)	[1]	$ (143,751)	[2]
ProShares Ultra Bloomberg Commodity [Member] | Swap Agreement with Goldman Sachs International Based on Bloomberg Commodity Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		0.25%	[1],[3]	0.25%	[2],[4]
Termination Date		Jan. 6, 2016	[1]	Jan. 6, 2015	[2]
Notional Amount at Value	[6]	$ 4,426,279	[1]	$ 2,221,450	[2]
Unrealized Appreciation (Depreciation)		$ (60,830)	[1]	$ (138,532)	[2]
ProShares Ultra Bloomberg Commodity [Member] | Swap Agreement with UBS AG Based on Bloomberg Commodity Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)		0.60%	[1],[3]	0.60%	[2],[4]
Termination Date		Jan. 6, 2016	[1]	Jan. 6, 2015	[2]
Notional Amount at Value	[6]	$ 1,576,626	[1]	$ 780,251	[2]
Unrealized Appreciation (Depreciation)		$ (72,482)	[1]	(49,055)	[2]
ProShares Ultra Bloomberg Commodity [Member] | Swap Agreement with Citibank N.A. Based on Bloomberg Commodity Index [Member]
Schedule of Investments [Line Items]
Rate Paid (Received)	[1],[3]	0.18%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ 1,622,466
Unrealized Appreciation (Depreciation)	[1]	32,372
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (72,176,589)	[1]	$ (76,181,097)	[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)		0.25%	[1],[3]	0.25%	[2],[4]
Termination Date		Jan. 6, 2016	[1]	Jan. 6, 2015	[2]
Notional Amount at Value	[6]	$ 292,553,469	[1]	$ 165,659,833	[2]
Unrealized Appreciation (Depreciation)		$ (20,221,872)	[1]	$ (24,223,667)	[2]
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)	[2],[4]			0.25%
Termination Date	[2]			Jan. 6, 2015
Notional Amount at Value	[2],[6]			$ 151,188,034
Unrealized Appreciation (Depreciation)	[2]			$ (24,285,701)
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)	[2],[4]			0.25%
Termination Date	[2]			Jan. 6, 2015
Notional Amount at Value	[2],[6]			$ 39,239,652
Unrealized Appreciation (Depreciation)	[2]			$ (5,528,160)
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)		0.25%	[1],[3]	0.25%	[2],[4]
Termination Date		Jan. 6, 2016	[1]	Jan. 6, 2015	[2]
Notional Amount at Value	[6]	$ 294,338,185	[1]	$ 156,716,204	[2]
Unrealized Appreciation (Depreciation)		$ (22,281,150)	[1]	$ (22,143,569)	[2]
ProShares Ultra 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)	[1],[3]	0.18%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ 158,594,078
Unrealized Appreciation (Depreciation)	[1]	$ (2,509,989)
ProShares Ultra 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)	[1],[3]	0.25%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ 298,419,036
Unrealized Appreciation (Depreciation)	[1]	$ (20,806,119)
ProShares Ultra 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)	[1],[3]	0.25%
Termination Date	[1]	Jan. 6, 2016
Notional Amount at Value	[1],[6]	$ 100,733,521
Unrealized Appreciation (Depreciation)	[1]	$ (6,357,459)
[1]	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.
[2]	The positions and counterparties herein are as of December 31, 2014. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[3]	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.
[4]	Reflects the floating financing rate, as of December 31, 2014, on the notional amount of the swap agreement paid to the counterparty or received from the counterparty, excluding any commissions.
[5]	For swap agreements, a positive amount represents "long" exposure to the benchmark index. A negative amount represents short" exposure to the benchmark index.
[6]	For swap agreements, a positive amount represents "long" exposure to the benchmark index. A negative amount represents "short" exposure to the benchmark index.

Schedule of Investments - Forwa

Schedule of Investments - Forward Agreements (Detail) - Forward Agreements [Member] - USD ($)		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014	[2]
ProShares UltraShort Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 1,808,942	[1]	$ (2,282,778)
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)	[1],[3]	0.50%
Settlement Date	[1]	Jan. 6, 2016
Commitment to (Deliver)/Receive	[1]	$ (6,500)
Notional Amount at Value	[1],[4]	(6,889,740)
Unrealized Appreciation (Depreciation)	[1]	$ 3,915
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)		0.25%	[1],[3]	0.34%	[5]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ (68,100)	[1]	$ (70,900)
Notional Amount at Value	[4]	(72,186,681)	[1]	(85,504,691)
Unrealized Appreciation (Depreciation)		$ 1,046,664	[1]	$ (1,422,997)
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)		0.60%	[1],[3]	0.44%	[5]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ (26,298)	[1]	$ (26,898)
Notional Amount at Value	[4]	(27,874,828)	[1]	(32,438,719)
Unrealized Appreciation (Depreciation)		$ 158,827	[1]	$ (354,660)
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)		0.74%	[1],[3]	0.54%	[5]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ (14,000)	[1]	$ (13,700)
Notional Amount at Value	[4]	(14,839,440)	[1]	(16,522,063)
Unrealized Appreciation (Depreciation)		$ 212,680	[1]	$ (182,225)
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)		0.61%	[1],[3]	0.44%	[5]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ (26,350)	[1]	$ (24,050)
Notional Amount at Value	[4]	(27,929,946)	[1]	(29,004,060)
Unrealized Appreciation (Depreciation)		386,856	[1]	(322,896)
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (22,561,101)	[1]	$ (12,395,120)
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)		1.10%	[1],[5]	0.97%	[6]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ 13,088,000	[1]	$ 19,068,000
Notional Amount at Value	[4]	180,899,718	[1]	304,550,282
Unrealized Appreciation (Depreciation)		$ (9,355,945)	[1]	$ (6,220,069)
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)		0.95%	[1],[5]	1.05%	[6]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ 6,855,800	[1]	$ 7,100,800
Notional Amount at Value	[4]	94,755,383	[1]	113,411,137
Unrealized Appreciation (Depreciation)		$ (5,106,853)	[1]	$ (2,124,796)
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)		1.00%	[1],[5]	1.09%	[6]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ 3,984,000	[1]	$ 4,628,000
Notional Amount at Value	[4]	55,063,661	[1]	73,916,565
Unrealized Appreciation (Depreciation)		$ (2,704,459)	[1]	$ (1,384,207)
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)		0.99%	[1],[5]	1.05%	[6]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ 7,373,000	[1]	$ 5,653,000
Notional Amount at Value	[4]	101,903,708	[1]	90,287,455
Unrealized Appreciation (Depreciation)		(5,393,844)	[1]	(2,666,048)
ProShares UltraShort Silver [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 4,778,279	[1]	$ 594,953
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)	[5]	(0.50%)	[1]	(0.37%)
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ (3,253,000)	[1]	$ (3,409,000)
Notional Amount at Value	[4]	(44,962,315)	[1]	(54,447,866)
Unrealized Appreciation (Depreciation)		$ 2,500,263	[1]	$ 462,619
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)	[5]	(0.10%)	[1]	(0.20%)
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ (2,047,500)	[1]	$ (1,195,500)
Notional Amount at Value	[4]	(28,298,907)	[1]	(19,094,048)
Unrealized Appreciation (Depreciation)		$ 1,044,986	[1]	$ 138,563
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)	[5]	0.00%	[1]	(0.09%)
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ (656,000)	[1]	$ (687,000)
Notional Amount at Value	[4]	(9,066,707)	[1]	(10,972,489)
Unrealized Appreciation (Depreciation)		$ 438,975	[1]	$ 198,341
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)	[5]	(0.09%)	[1]	(0.15%)
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ (2,135,000)	[1]	$ (1,336,000)
Notional Amount at Value	[4]	(29,508,262)	[1]	(21,338,058)
Unrealized Appreciation (Depreciation)		794,055	[1]	(204,570)
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (2,250,595)	[1]	$ 2,051,154
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],[5]	0.00%
Settlement Date	[1]	Jan. 6, 2016
Commitment to (Deliver)/Receive	[1]	$ 3,000
Notional Amount at Value	[1],[4]	3,179,880
Unrealized Appreciation (Depreciation)	[1]	$ (4,614)
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)		0.35%	[1],[5]	0.26%	[6]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ 63,900	[1]	$ 90,800
Notional Amount at Value	[4]	67,734,639	[1]	109,503,892
Unrealized Appreciation (Depreciation)		$ (1,049,383)	[1]	$ 1,231,694
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)		0.25%	[1],[5]	0.41%	[6]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ 23,620	[1]	$ 31,420
Notional Amount at Value	[4]	25,036,255	[1]	37,892,206
Unrealized Appreciation (Depreciation)		$ (520,730)	[1]	$ 222,126
ProShares Ultra 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)		0.26%	[1],[5]	0.46%	[6]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ 15,400	[1]	$ 15,200
Notional Amount at Value	[4]	16,323,384	[1]	18,331,048
Unrealized Appreciation (Depreciation)		$ (244,992)	[1]	$ 190,591
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)		0.19%	[1],[5]	0.36%	[6]
Settlement Date		Jan. 6, 2016	[1]	Jan. 6, 2015
Commitment to (Deliver)/Receive		$ 25,700	[1]	$ 31,600
Notional Amount at Value	[4]	27,240,972	[1]	38,109,284
Unrealized Appreciation (Depreciation)		$ (430,876)	[1]	$ 406,743
[1]	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.
[2]	The positions and counterparties herein are as of December 31, 2014. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[3]	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.
[4]	For forward agreements, a positive amount represents "long" exposure to the underlying commodity. A negative amount represents "short" exposure to the underlying commodity.
[5]	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.
[6]	Reflects the floating financing rate, as of December 31, 2014, 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) - USD ($)		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014
ProShares UltraShort Yen [Member] | Contracts to Purchase [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ 933,727	[1]	$ (2,079,353)	[2]
ProShares UltraShort Yen [Member] | Contracts to Purchase [Member] | Yen with Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 8, 2016	[1]	Jan. 9, 2015	[2]
Local Currency		$ 5,938,040,200	[1]	$ 8,266,326,300	[2]
Notional Amount at Value		49,402,434	[1]	69,025,668	[2]
Unrealized Appreciation (Depreciation)		$ 319,567	[1]	$ (1,395,668)	[2]
ProShares UltraShort Yen [Member] | Contracts to Purchase [Member] | Yen with UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 8, 2016	[1]	Jan. 9, 2015	[2]
Local Currency		$ 11,521,875,200	[1]	$ 13,530,509,400	[2]
Notional Amount at Value		95,858,003	[1]	112,982,770	[2]
Unrealized Appreciation (Depreciation)		614,160	[1]	(683,685)	[2]
ProShares UltraShort Yen [Member] | Contracts to Sell [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (14,829,179)	[1]	$ 500,578	[2]
ProShares UltraShort Yen [Member] | Contracts to Sell [Member] | Yen with Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 8, 2016	[1]	Jan. 9, 2015	[2]
Local Currency		$ (33,696,676,000)	[1]	$ (72,481,612,100)	[2]
Notional Amount at Value		(280,344,651)	[1]	(605,237,623)	[2]
Unrealized Appreciation (Depreciation)		$ (6,789,972)	[1]	$ (70,571)	[2]
ProShares UltraShort Yen [Member] | Contracts to Sell [Member] | Yen with UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 8, 2016	[1]	Jan. 9, 2015	[2]
Local Currency		$ (40,852,769,100)	[1]	$ (76,736,367,800)	[2]
Notional Amount at Value		(339,880,862)	[1]	(640,765,782)	[2]
Unrealized Appreciation (Depreciation)		(8,039,207)	[1]	571,149	[2]
ProShares Ultra Yen [Member] | Contracts to Purchase [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)	[1]	$ 267,014		$ (15,148)
ProShares Ultra Yen [Member] | Contracts to Purchase [Member] | Yen with Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 8, 2016		Jan. 9, 2015
Local Currency	[1]	$ 866,666,900		$ 229,660,300
Notional Amount at Value	[1]	7,210,368		1,917,715
Unrealized Appreciation (Depreciation)	[1]	$ 172,891		$ (11,754)
ProShares Ultra Yen [Member] | Contracts to Purchase [Member] | Yen with UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 8, 2016		Jan. 9, 2015
Local Currency	[1]	$ 488,922,300		$ 304,204,900
Notional Amount at Value	[1]	4,067,664		2,540,179
Unrealized Appreciation (Depreciation)	[1]	94,123		(3,394)
ProShares Ultra Yen [Member] | Contracts to Sell [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)	[1]	$ (5,703)		$ (97)
ProShares Ultra Yen [Member] | Contracts to Sell [Member] | Yen with Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 8, 2016		Jan. 9, 2015
Local Currency	[1]	$ (18,830,800)		$ (9,518,600)
Notional Amount at Value	[1]	(156,666)		(79,482)
Unrealized Appreciation (Depreciation)	[1]	$ (3,104)		$ (501)
ProShares Ultra Yen [Member] | Contracts to Sell [Member] | Yen with UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 8, 2016		Jan. 9, 2015
Local Currency	[1]	$ (21,100,300)		$ (16,144,000)
Notional Amount at Value	[1]	(175,547)		(134,806)
Unrealized Appreciation (Depreciation)	[1]	(2,599)		404
ProShares UltraShort Euro [Member] | Contracts to Purchase [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (1,965,394)	[1]	$ (2,256,771)	[2]
ProShares UltraShort Euro [Member] | Contracts to Purchase [Member] | Euro with Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 8, 2016	[1]	Jan. 9, 2015	[2]
Local Currency		$ 129,386,700	[1]	$ 31,647,600	[2]
Notional Amount at Value		140,627,935	[1]	38,298,521	[2]
Unrealized Appreciation (Depreciation)		$ (1,100,282)	[1]	$ (1,118,702)	[2]
ProShares UltraShort Euro [Member] | Contracts to Purchase [Member] | Euro with UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 8, 2016	[1]	Jan. 9, 2015	[2]
Local Currency		$ 75,393,200	[1]	$ 40,314,300	[2]
Notional Amount at Value		81,943,430	[1]	48,786,577	[2]
Unrealized Appreciation (Depreciation)		(865,112)	[1]	(1,138,069)	[2]
ProShares UltraShort Euro [Member] | Contracts to Sell [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)		$ (26,744,942)	[1]	$ 19,019,765	[2]
ProShares UltraShort Euro [Member] | Contracts to Sell [Member] | Euro with Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 8, 2016	[1]	Jan. 9, 2015	[2]
Local Currency		$ (602,732,925)	[1]	$ (443,778,725)	[2]
Notional Amount at Value		(655,098,912)	[1]	(537,041,321)	[2]
Unrealized Appreciation (Depreciation)		$ (13,891,742)	[1]	$ 9,312,005	[2]
ProShares UltraShort Euro [Member] | Contracts to Sell [Member] | Euro with UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date		Jan. 8, 2016	[1]	Jan. 9, 2015	[2]
Local Currency		$ (562,621,100)	[1]	$ (483,290,100)	[2]
Notional Amount at Value		(611,502,135)	[1]	(584,856,233)	[2]
Unrealized Appreciation (Depreciation)		(12,853,200)	[1]	9,707,760	[2]
ProShares Ultra Euro [Member] | Contracts to Purchase [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)	[1]	$ 587,231		$ (106,292)
ProShares Ultra Euro [Member] | Contracts to Purchase [Member] | Euro with Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 8, 2016		Jan. 9, 2015
Local Currency	[1]	$ 12,451,525		$ 2,080,425
Notional Amount at Value	[1]	13,533,325		2,517,638
Unrealized Appreciation (Depreciation)	[1]	$ 298,929		$ (40,058)
ProShares Ultra Euro [Member] | Contracts to Purchase [Member] | Euro with UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 8, 2016		Jan. 9, 2015
Local Currency	[1]	$ 11,518,600		$ 3,032,200
Notional Amount at Value	[1]	12,519,346		3,669,434
Unrealized Appreciation (Depreciation)	[1]	288,302		(66,234)
ProShares Ultra Euro [Member] | Contracts to Sell [Member]
Schedule of Investments [Line Items]
Unrealized Appreciation (Depreciation)	[1]	$ 17,689		$ 2,921
ProShares Ultra Euro [Member] | Contracts to Sell [Member] | Euro with Goldman Sachs International [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 8, 2016		Jan. 9, 2015
Local Currency	[1]	$ (3,430,700)		$ (63,400)
Notional Amount at Value	[1]	(3,728,762)		(76,724)
Unrealized Appreciation (Depreciation)	[1]	$ 16,425		$ 1,202
ProShares Ultra Euro [Member] | Contracts to Sell [Member] | Euro with UBS AG [Member]
Schedule of Investments [Line Items]
Settlement Date	[1]	Jan. 8, 2016		Jan. 9, 2015
Local Currency	[1]	$ (555,100)		$ (122,500)
Notional Amount at Value	[1]	(603,328)		(148,244)
Unrealized Appreciation (Depreciation)	[1]	$ 1,264		$ 1,719
[1]	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.
[2]	The positions and counterparties herein are as of December 31, 2014. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.

Organization - Additional Infor

Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)Trustshares
Organization [Line Items]
Number of series of Trust | Trust	21
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 Commodity [Member]
Organization [Line Items]
Aggregate purchase price of each Leveraged Fund	$ 350
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 Commodity [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, 2015
ProShares VIX Short-Term Futures ETF [Member] | June 10, 2013 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	June 10, 2013
Date Trading Resumed at Post- Split Price	June 10, 2013
Type of Split	1-for-5 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)	November 6, 2014
Date Trading Resumed at Post- Split Price	November 6, 2014
Type of Split	1-for-4 reverse Share split
ProShares Short VIX Short-Term Futures ETF [Member] | January 21, 2014 Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	January 21, 2014
Date Trading Resumed at Post- Split Price	January 24, 2014
Funds Split	2-for-1 Share split
ProShares Ultra VIX Short-Term Futures ETF [Member] | June 10, 2013 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	June 10, 2013
Date Trading Resumed at Post- Split Price	June 10, 2013
Funds Split	1-for-10 reverse 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)	January 21, 2014
Date Trading Resumed at Post- Split Price	January 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 UltraShort Bloomberg Natural Gas [Member] | June 10, 2013 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	June 10, 2013
Date Trading Resumed at Post- Split Price	June 10, 2013
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)	November 13, 2015
Date Trading Resumed at Post- Split Price	November 13, 2015
Funds Split	2-for-1 Share split
ProShares Ultra Silver [Member] | January 21, 2014 Reverse Share Split [Member]
Organization [Line Items]
Execution Date (Prior to Opening of Trading)	January 21, 2014
Date Trading Resumed at Post- Split Price	January 24, 2014
Type of Split	1-for-4 reverse Share split
ProShares Ultra Bloomberg Commodity [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 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

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, 2015
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 31
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 31
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 31
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 31
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 31
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 31
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 31
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 31
ProShares UltraShort Bloomberg Commodity [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	10:45 a.m.
NAV Calculation Time	2:30 p.m.
NAV Calculation Date	December 31
ProShares Ultra Bloomberg Commodity [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	10:45 a.m.
NAV Calculation Time	2:30 p.m.
NAV Calculation Date	December 31
ProShares Managed Futures Strategy [Member]
Net Asset Value [Line Items]
Create/Redeem Cut-off	10:45 a.m.
NAV Calculation Time	3:00 p.m.
NAV Calculation Date	December 31
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 31
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 31
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 31
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 31
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 31
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 31
ProShares 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 31
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 31
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 31
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 31

Significant Accounting Polici35

Significant Accounting Policies - Valuation of Investments using Fair Value Hierarchy (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
ProShares Managed Futures Strategy [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	$ 57,179	$ 104,327
ProShares VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	94,995,034	88,352,919
ProShares VIX Mid-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	25,631,927	24,366,571
ProShares Short VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	546,139,133	430,623,071
ProShares Ultra VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	450,252,315	222,224,441
ProShares UltraShort Bloomberg Commodity [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	7,689,443	4,800,807
ProShares UltraShort Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	88,569,811	174,419,288
ProShares UltraShort Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	5,643,840	12,614,175
ProShares UltraShort Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	74,794,067	81,752,809
ProShares UltraShort Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	55,514,479	52,823,205
ProShares Short Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	15,396,649	12,471,908
ProShares UltraShort Australian Dollar [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	17,988,624	21,011,160
ProShares UltraShort Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	517,456,440	503,874,111
ProShares UltraShort Yen [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	246,101,549	531,378,971
ProShares Ultra Bloomberg Commodity [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	6,900,149	2,423,562
ProShares Ultra Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	707,544,640	344,544,852
ProShares Ultra Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	33,120,610	18,520,944
ProShares Ultra Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	69,656,792	103,983,591
ProShares Ultra Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	216,329,495	293,077,531
ProShares Ultra Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	12,210,182	2,312,327
ProShares Ultra Yen [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	5,330,802	1,272,624
Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	3,197,323,160
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	96,073,659	82,088,299
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	25,976,287	24,105,906
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	535,392,718	446,975,220
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	438,357,849	182,639,188
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares UltraShort Bloomberg Commodity [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	7,518,119	4,233,548
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	79,692,642	131,594,608
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	8,115,004	8,672,710
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	72,979,905	84,040,107
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	50,730,230	52,226,692
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	15,153,211	12,086,577
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	18,408,894	20,267,679
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	546,166,776	487,111,117
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	259,997,001	532,957,746
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member] | ProShares Ultra Bloomberg Commodity [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	7,084,065	2,754,900
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	797,650,543	467,200,736
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	26,807,731	53,410,227
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	71,912,587	101,927,857
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	238,899,626	305,474,211
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	11,605,262	2,415,698
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	5,069,491	1,287,869
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	3,313,591,600
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Managed Futures Strategy [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	57,179	104,327
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares VIX Short-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(1,078,625)	6,264,620
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(344,360)	260,665
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	10,746,415	(16,352,149)
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	11,894,466	39,585,253
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	2,464,513	15,806,603
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(2,471,164)	3,941,465
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	5,220	(4,520)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	5,970	1,560
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Short Euro [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	243,438	385,331
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(420,270)	743,481
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(17,929,314)	(46,474,787)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	6,312,879	(34,889,283)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(5,200)	4,580
Level I - Quoted Prices [Member] | Futures Contracts [Member] | ProShares Ultra Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(9,030)	(1,560)
Level I - Quoted Prices [Member] | Futures Contracts [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	9,472,117
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | ProShares UltraShort Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	1,808,942	(2,282,778)
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | ProShares UltraShort Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	4,778,279	594,953
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | ProShares Ultra Gold [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(2,250,595)	2,051,154
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | ProShares Ultra Silver [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(22,561,101)	(12,395,120)
Level II - Other Significant Observable Inputs [Member] | Forward Agreements [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(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	(28,710,336)	16,762,994
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	(13,895,452)	(1,578,775)
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	604,920	(103,371)
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	261,311	(15,245)
Level II - Other Significant Observable Inputs [Member] | Foreign Currency Forward Contracts [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(41,739,557)
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member] | ProShares UltraShort Bloomberg Commodity [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	171,324	567,259
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	6,412,656	27,018,077
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member] | ProShares Ultra Bloomberg Commodity [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	(183,916)	(331,338)
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	(72,176,589)	$ (76,181,097)
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member] | Total Trust [Member]
Significant Accounting Policies [Line Items]
Investments, fair value disclosure	$ (65,776,525)

Significant Accounting Polici36

Significant Accounting Policies - Additional Information (Detail) - USD ($)	Jul. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
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, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	$ 46,904,273	$ 117,369,486	[2]
Derivative liability not designated as hedging instrument, Unrealized Depreciation		163,172,713	193,887,187	[1],[2]
Managed Futures Contracts [Member] | Payable on Open Futures Contracts [Member] | ProShares Managed Futures Strategy [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation		42,957	18,504	[1],[2]
Managed Futures Contracts [Member] | Receivables on Open Futures Contracts [Member] | ProShares Managed Futures Strategy [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	100,136	122,831	[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		354,365	222,845	[1],[2]
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		58,830	16,352,149	[1],[2]
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		1,078,625
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]	10,005	483,510	[2]
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]	10,805,245	6,264,620	[2]
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]	11,894,466	39,585,253	[2]
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1],[2]		2,287,298
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation			204,570
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra Bloomberg Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation		216,288	331,338
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		90,105,903	122,655,884	[1],[2]
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation	[1],[2]		34,889,283
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		22,570,131	12,396,680	[1],[2]
Commodity Contracts [Member] | Payable on Open Futures Contracts, Unrealized Depreciation on Swap and/or Forward Agreements [Member] | ProShares UltraShort Bloomberg Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not designated as hedging instrument, Unrealized Depreciation		53,167
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		2,471,164
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		2,255,795
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap 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]	1,814,162
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap 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]	4,784,249	801,083	[2]
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares Ultra Bloomberg Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		32,372
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap 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]	6,312,879
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares UltraShort Bloomberg Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		224,491	567,259
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap 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	42,824,680	[2]
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1],[2]		3,941,465
Commodity Contracts [Member] | Receivables on Open Futures Contracts, Unrealized Appreciation on Swap and/ or Forwards Agreements [Member] | ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1],[2]		2,055,734
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		28,710,336	2,256,771
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		14,829,179	2,149,924
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			106,292
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		5,703	15,649
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		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			19,019,765
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		933,727	571,149
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		604,920	2,921
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		267,014	404
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]	$ 243,438	385,331	[2]
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			$ 743,481
[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]	Amount excludes the activity of ProShares Ultra Australian Dollar which liquidated in June 2015.

Investments - Effect of Derivat

Investments - Effect of Derivative Instruments on Statements of Operations (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	$ (1,164,277,383)	$ (160,255,767)	$ (920,659,286)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(39,750,739)	(46,030,931)	41,907,376
Managed Futures Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts / Changes in Unrealized Appreciation/ Depreciation on Futures Contracts [Member] | ProShares Managed Futures Strategy [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	(278,197)	109,006
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(47,148)	104,327
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 or (Loss) on Derivatives Recognized in Income	(19,408,543)	(694,347)	(144,618,136)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(7,343,245)	22,917,306	(16,431,267)
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 or (Loss) on Derivatives Recognized in Income	(3,335,936)	(14,378,810)	(28,219,863)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(605,025)	5,157,354	(3,426,279)
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 or (Loss) on Derivatives Recognized in Income	69,793,028	76,925,998	87,175,105
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	27,098,564	(24,469,104)	9,504,130
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 or (Loss) on Derivatives Recognized in Income	(392,174,228)	(139,412,525)	(405,816,676)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(27,690,787)	63,595,164	(26,368,324)
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 Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	3,701,239	906,309	760,002
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(395,935)	594,924	(176,167)
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 or (Loss) on Derivatives Recognized in Income	91,670,324	99,327,097	(12,304,999)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(33,947,511)	46,390,353	6,071,108
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 or (Loss) on Derivatives Recognized in Income	15,212,804	8,791,719	(2,585,514)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(6,412,629)	2,899,165	633,165
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 or (Loss) on Derivatives Recognized in Income	12,707,635	(5,316,482)	61,124,409
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	4,101,460	(7,934,871)	1,902,477
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 or (Loss) on Derivatives Recognized in Income	10,759,545	15,114,883	113,456,404
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	4,187,736	2,810,170	(21,561,362)
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 Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	(2,951,820)	(1,065,622)	(1,254,251)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	147,422	(346,416)	321,346
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 or (Loss) on Derivatives Recognized in Income	(896,177,096)	(243,325,957)	120,745,948
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	32,549,981	(125,240,438)	(52,709,476)
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 or (Loss) on Derivatives Recognized in Income	(100,776,817)	(6,464,796)	41,418,165
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	41,202,162	(31,232,744)	160,411
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 or (Loss) on Derivatives Recognized in Income	(18,605,815)	(9,674,333)	(165,632,786)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(4,311,529)	8,883,268	8,839,764
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 or (Loss) on Derivatives Recognized in Income	(78,309,309)	(155,551,420)	(701,532,729)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(10,173,451)	(9,889,600)	143,273,646
Foreign Exchange 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 Short Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income			(381,987)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income			21,825
Foreign Exchange 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 Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income			2,720,079
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income			832,015
Foreign Exchange 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 Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income			(48,063,036)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income			(600,935)
Foreign Exchange 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 Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income			164,019,598
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income			(8,727,491)
Foreign Exchange 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 Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income			210,150
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income			13,803
Foreign Exchange 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 Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income			(1,879,169)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income			$ 334,987
Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts or Forward Agreements/Changes in Unrealized Appreciation/Depreciation on Futures Contracts or Forward Agreements [Member] | ProShares Short Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	1,559,425	1,593,048
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(141,893)	418,562
Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts or Forward Agreements/Changes in Unrealized Appreciation/Depreciation on Futures Contracts or Forward Agreements [Member] | ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	4,330,463	2,296,216
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(1,163,751)	(174,124)
Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts or Forward Agreements/Changes in Unrealized Appreciation/Depreciation on Futures Contracts or Forward Agreements [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	131,651,572	83,678,955
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(45,473,330)	30,511,501
Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts or Forward Agreements/Changes in Unrealized Appreciation/Depreciation on Futures Contracts or Forward Agreements [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	8,809,464	127,846,225
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	(12,316,677)	(30,965,459)
Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts or Forward Agreements/Changes in Unrealized Appreciation/Depreciation on Futures Contracts or Forward Agreements [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	(1,982,208)	(420,533)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	708,291	(204,333)
Foreign Exchange Contracts [Member] | Net Realized Gain (Loss) on Futures Contracts or Forward Agreements/Changes in Unrealized Appreciation/Depreciation on Futures Contracts or Forward Agreements [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain or (Loss) on Derivatives Recognized in Income	(472,913)	(540,398)
Change in Unrealized Appreciation or Depreciation on Derivatives Recognized in Income	$ 276,556	$ 144,064

Investments - Offsetting of Fin

Investments - Offsetting of Financial Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
ProShares UltraShort Bloomberg Commodity [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	$ 224,491	$ 567,259
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	224,491	567,259
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	53,167
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	53,167
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	27,018,077
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	27,018,077
Gross Amounts Offset in the Statements of Financial Condition	0	0
ProShares UltraShort Gold [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	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	1,808,942
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition		2,282,778
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition		2,282,778
ProShares UltraShort Silver [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	4,778,279	799,523
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	4,778,279	799,523
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition		204,570
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition		204,570
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition		19,019,765
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition		19,019,765
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	28,710,336	2,256,771
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	28,710,336	2,256,771
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	933,727	571,149
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	933,727	571,149
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	14,829,179	2,149,924
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	14,829,179	2,149,924
ProShares Ultra Bloomberg Commodity [Member] | Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	32,372
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	32,372
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	216,288	331,338
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	216,288	331,338
ProShares Ultra Bloomberg Crude Oil [Member] | Swap 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	72,176,589	76,181,097
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	76,181,097
ProShares Ultra Gold [Member] | Forward Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition		2,051,154
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition		2,051,154
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	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	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	22,561,101	12,395,120
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	22,561,101	12,395,120
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	604,920	2,921
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	604,920	2,921
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition		106,292
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition		106,292
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	267,014	404
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	267,014	404
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	5,703	15,649
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	$ 5,703	$ 15,649

Investments - Gross Amounts Not

Investments - Gross Amounts Not Offset in Statements of Financial Condition (Detail) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
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)
Amounts of Recognized Liabilities presented in the Statements of Financial Condition		$ (1,422,997)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		1,422,997
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares UltraShort Gold [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	158,827
Net Amount	158,827
Amounts of Recognized Liabilities presented in the Statements of Financial Condition		(354,660)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		354,660
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares UltraShort Gold [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	212,680
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(212,680)
Amounts of Recognized Liabilities presented in the Statements of Financial Condition		(182,225)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		182,225
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares UltraShort Gold [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	386,856
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(386,856)
Amounts of Recognized Liabilities presented in the Statements of Financial Condition		(322,896)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		322,896
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares UltraShort Gold [Member] | Citibank Na [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	3,915
Net Amount	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	462,619
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(2,500,000)	(462,619)
Net Amount	263
ProShares UltraShort Silver [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	1,044,986	138,563
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(858,460)	(138,563)
Net Amount	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	438,975	198,341
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(438,975)	(198,341)
ProShares UltraShort Silver [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	794,055
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(582,692)
Net Amount	211,363
Amounts of Recognized Liabilities presented in the Statements of Financial Condition		(204,570)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		204,570
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares UltraShort Yen [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(6,470,405)	(1,466,239)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	6,470,405	1,466,239
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares UltraShort Yen [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(7,425,047)	(112,536)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	7,425,047	112,536
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Bloomberg Commodity [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(82,976)	(143,751)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	82,976	143,751
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Bloomberg Commodity [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(60,830)	(138,532)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	60,830	138,532
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Bloomberg Commodity [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(72,482)	(49,055)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	72,482	49,055
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Bloomberg Commodity [Member] | Citibank Na [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	32,372
Net Amount	32,372
ProShares Ultra Bloomberg Crude Oil [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(20,221,872)	(24,223,667)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	20,221,872	24,223,667
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Bloomberg Crude Oil [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(20,806,119)	(24,285,701)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	20,806,119	24,285,701
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Bloomberg Crude Oil [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(6,357,459)	(5,528,160)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	6,357,459	5,528,160
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Bloomberg Crude Oil [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(22,281,150)	(22,143,569)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	22,281,150	22,143,569
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Bloomberg Crude Oil [Member] | Citibank Na [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities 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 Liabilities presented in the Statements of Financial Condition	(9,355,945)	(6,220,069)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	9,355,945	6,220,069
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
ProShares Ultra Silver [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(5,106,853)	(2,124,796)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	5,106,853	2,124,796
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 Liabilities presented in the Statements of Financial Condition	(2,704,459)	(1,384,207)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	2,704,459	1,384,207
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 Liabilities presented in the Statements of Financial Condition	(5,393,844)	(2,666,048)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	5,393,844	2,666,048
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	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 Liabilities presented in the Statements of Financial Condition		(38,856)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		38,856
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 Liabilities presented in the Statements of Financial Condition		(64,515)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		64,515
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 Amount	169,787
Amounts of Recognized Liabilities presented in the Statements of Financial Condition		(12,255)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		12,255
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 Amount	91,524
Amounts of Recognized Liabilities presented in the Statements of Financial Condition		(2,990)
Financial Instruments for the Benefit of (the Funds) / the Counterparties		2,990
Cash Collateral for the Benefit of (the Funds) / the Counterparties		0
ProShares UltraShort Bloomberg Commodity [Member] | Deutsche Bank AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	84,161	243,474
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(50,000)
Net Amount	34,161	243,474
ProShares UltraShort Bloomberg Commodity [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	36,878	240,271
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(28,466)
Net Amount	8,412	240,271
ProShares UltraShort Bloomberg Commodity [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	103,452	83,514
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(103,452)
Net Amount		83,514
ProShares UltraShort Bloomberg Commodity [Member] | Citibank Na [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(53,167)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	53,167
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		8,193,303
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(6,008,925)
Net Amount		2,184,378
Amounts of Recognized Liabilities 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		8,569,691
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(6,592,366)
Cash Collateral for the Benefit of (the Funds) / the Counterparties		(11,518)
Net Amount		1,965,807
Amounts of Recognized Liabilities 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		1,231,694
Cash Collateral for the Benefit of (the Funds) / the Counterparties		(1,231,694)
Amounts of Recognized Liabilities 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		222,126
Net Amount		222,126
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(520,730)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	520,730
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares Ultra Gold [Member] | Societe Generale S.A. [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		190,591
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(190,591)
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(244,992)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	244,992
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares Ultra Gold [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition		406,743
Financial Instruments for the Benefit of (the Funds) / the Counterparties		(406,743)
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(430,876)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	430,876
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
ProShares Ultra Gold [Member] | Citibank Na [Member]
Derivative [Line Items]
Amounts of Recognized Liabilities presented in the Statements of Financial Condition	(4,614)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0
Net Amount	(4,614)
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	7,669,493
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(1,722,894)	(6,800,000)
Net Amount		869,493
ProShares UltraShort Bloomberg Crude Oil [Member] | Goldman Sachs International [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	1,595,552	8,362,336
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(1,595,552)	(7,598,657)
Net Amount		763,679
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	521,142	2,132,657
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(521,142)	(2,132,657)
ProShares UltraShort Bloomberg Crude Oil [Member] | UBS AG [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	1,474,790	8,853,591
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(1,474,790)	(8,281,350)
Net Amount		$ 572,241
ProShares UltraShort Bloomberg Crude Oil [Member] | Citibank Na [Member]
Derivative [Line Items]
Amounts of Recognized Assets presented in the Statements of Financial Condition	1,098,278
Net Amount	$ 1,098,278

Agreements - Additional Informa

Agreements - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)
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%
Managed Futures 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	0.75%

Offering Costs - Additional Inf

Offering Costs - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015
Organization And Offering Costs [Line Items]
Offering costs, amortization period	12 months
Managed Futures Fund [Member]
Organization And Offering Costs [Line Items]
Sponsor reimbursement of organization and offering costs, maximum for each Leveraged Fund	0.75%

Creation and Redemption of Cr43

Creation and Redemption of Creation Units - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015$ / 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%
Managed Futures Fund [Member]
Creation And Redemption Of Creation Units [Line Items]
Creation Unit, block Shares of a Fund	50,000
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, 2015	Dec. 31, 2014	Dec. 31, 2013
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	$ 3,195,477	$ 1,805,293	$ 1,894,962
ProShares VIX Short-Term Futures ETF [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	105,024	72,020
ProShares VIX Mid-Term Futures ETF [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	8,521	8,927
ProShares Short VIX Short-Term Futures ETF [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	342,734	218,121	130,779
ProShares Ultra VIX Short-Term Futures ETF [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	1,391,292	734,298	814,195
ProShares UltraShort Bloomberg Crude Oil [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	382,054	257,458	298,261
ProShares UltraShort Bloomberg Natural Gas [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	8,853	26,053	7,434
ProShares UltraShort Gold [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	11,024	32,473	105,508
ProShares UltraShort Silver [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	39,354	48,832	128,850
ProShares Ultra Bloomberg Commodity [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	2,194	249	487
ProShares Ultra Bloomberg Crude Oil [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	847,422	299,493	236,956
ProShares Ultra Bloomberg Natural Gas [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	13,939	30,073	42,172
ProShares Ultra Gold [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	4,218	12,088	23,035
ProShares Ultra Silver [Member]
Creation And Redemption Of Creation Units [Line Items]
Transaction fees	$ 38,848	$ 65,208	$ 107,285

Financial Highlights - Per Shar

Financial Highlights - Per Share Operating Performance (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
ProShares Managed Futures Strategy [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 21.14	$ 20
Net investment income (loss)	(0.1750)	(0.0417)
Net realized and unrealized gain (loss)	(0.4266)	1.1771
Change in net asset value from operations	(0.6016)	1.1354
Net asset value, ending balance	20.53	21.14	$ 20
Market value per share, beginning balance	21.28
Market value per share, ending balance	$ 20.76	$ 21.28
Total Return, at net asset value	(2.80%)	5.70%
Total Return, at market value	(2.40%)	6.40%
Ratios to Average Net Assets
Expense ratio	(0.84%)	(0.82%)
Expense ratio, excluding brokerage commissions	(0.75%)	(0.75%)
Net investment income (loss)	(0.84%)	(0.82%)
ProShares VIX Short-Term Futures ETF [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 20.93	$ 28.5387	83.9374
Net investment income (loss)	(0.1324)	(0.2047)	(0.3518)
Net realized and unrealized gain (loss)	(7.5575)	(7.4019)	(55.0469)
Change in net asset value from operations	(7.6899)	(7.6066)	(55.3987)
Net asset value, ending balance	13.24	20.93	28.5387
Market value per share, beginning balance	20.99	28.53	85.05
Market value per share, ending balance	$ 13.33	$ 20.99	$ 28.53
Total Return, at net asset value	(36.70%)	(26.70%)	(66.00%)
Total Return, at market value	(36.50%)	(26.40%)	(66.50%)
Ratios to Average Net Assets
Expense ratio	(0.95%)	(0.92%)	(0.85%)
Expense ratio, excluding brokerage commissions	(0.85%)	(0.85%)	(0.85%)
Net investment income (loss)	(0.92%)	(0.88%)	(0.81%)
ProShares VIX Mid-Term Futures ETF [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 63.60	$ 77.1837	$ 138.8013
Net investment income (loss)	(0.5053)	(0.5666)	(0.7892)
Net realized and unrealized gain (loss)	(9.1341)	(13.0151)	(60.8284)
Change in net asset value from operations	(9.6394)	(13.5817)	(61.6176)
Net asset value, ending balance	53.96	63.60	77.1837
Market value per share, beginning balance	63.89	77.16	136.88
Market value per share, ending balance	$ 53.99	$ 63.89	$ 77.16
Total Return, at net asset value	(15.20%)	(17.60%)	(44.40%)
Total Return, at market value	(15.50%)	(17.20%)	(43.60%)
Ratios to Average Net Assets
Expense ratio	(0.91%)	(0.87%)	(0.85%)
Expense ratio, excluding brokerage commissions	(0.85%)	(0.85%)	(0.85%)
Net investment income (loss)	(0.88%)	(0.84%)	(0.81%)
ProShares Short VIX Short-Term Futures ETF [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 61.40	$ 67.4993	$ 33.0649
Net investment income (loss)	(0.8162)	(1.0247)	(0.7398)
Net realized and unrealized gain (loss)	(9.7692)	(5.0742)	35.1742
Change in net asset value from operations	(10.5854)	(6.0989)	34.4344
Net asset value, ending balance	50.81	61.40	67.4993
Market value per share, beginning balance	61.16	67.47	32.73
Market value per share, ending balance	$ 50.45	$ 61.16	$ 67.47
Total Return, at net asset value	(17.20%)	(9.00%)	104.10%
Total Return, at market value	(17.50%)	(9.40%)	106.20%
Ratios to Average Net Assets
Expense ratio	(1.40%)	(1.49%)	(1.53%)
Expense ratio, excluding brokerage commissions	(0.95%)	(0.95%)	(0.95%)
Net investment income (loss)	(1.36%)	(1.46%)	(1.49%)
ProShares Ultra VIX Short-Term Futures ETF [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 125.46	$ 335.4203	$ 4,026.4321
Net investment income (loss)	(0.7224)	(2.9055)	(15.0047)
Net realized and unrealized gain (loss)	(96.6526)	(207.0557)	(3,676.0071)
Change in net asset value from operations	(97.3750)	(209.9612)	(3,691.0118)
Net asset value, ending balance	28.08	125.46	335.4203
Market value per share, beginning balance	125.75	335.60	4,180
Market value per share, ending balance	$ 28.35	$ 125.75	$ 335.60
Total Return, at net asset value	(77.60%)	(62.60%)	(91.70%)
Total Return, at market value	(77.50%)	(62.50%)	(92.00%)
Ratios to Average Net Assets
Expense ratio	(1.65%)	(1.80%)	(1.82%)
Expense ratio, excluding brokerage commissions	(0.95%)	(0.95%)	(0.95%)
Net investment income (loss)	(1.61%)	(1.78%)	(1.80%)
ProShares UltraShort Bloomberg Commodity [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 87.75	$ 63.2936	$ 54.1021
Net investment income (loss)	(0.9438)	(0.5679)	(0.5355)
Net realized and unrealized gain (loss)	55.1020	25.0238	9.7270
Change in net asset value from operations	54.1582	24.4559	9.1915
Net asset value, ending balance	141.91	87.75	63.2936
Market value per share, beginning balance	87.44	58.41	51.64
Market value per share, ending balance	$ 140.41	$ 87.44	$ 58.41
Total Return, at net asset value	61.70%	38.60%	17.00%
Total Return, at market value	60.60%	49.70%	13.10%
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)	(0.91%)	(0.92%)	(0.90%)
ProShares UltraShort Bloomberg Crude Oil [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 77.98	$ 31.7301	$ 40.3079
Net investment income (loss)	(0.7848)	(0.2773)	(0.3033)
Net realized and unrealized gain (loss)	56.0077	46.5262	(8.2745)
Change in net asset value from operations	55.2229	46.2489	(8.5778)
Net asset value, ending balance	133.20	77.98	31.7301
Market value per share, beginning balance	76.52	31.58	40.44
Market value per share, ending balance	$ 133.64	$ 76.52	$ 31.58
Total Return, at net asset value	70.80%	145.80%	(21.30%)
Total Return, at market value	74.60%	142.30%	(21.90%)
Ratios to Average Net Assets
Expense ratio	(1.07%)	(0.98%)	(0.98%)
Expense ratio, excluding brokerage commissions	(0.95%)	(0.95%)	(0.95%)
Net investment income (loss)	(1.04%)	(0.94%)	(0.94%)
ProShares UltraShort Bloomberg Natural Gas [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 83.96	$ 69.9635	$ 102.1402
Net investment income (loss)	(1.3314)	(0.4961)	(0.9217)
Net realized and unrealized gain (loss)	56.9678	14.4903	(31.2550)
Change in net asset value from operations	55.6364	13.9942	(32.1767)
Net asset value, ending balance	139.59	83.96	69.9635
Market value per share, beginning balance	82.03	69.36	101.64
Market value per share, ending balance	$ 139.66	$ 82.03	$ 69.36
Total Return, at net asset value	66.30%	20.00%	(31.50%)
Total Return, at market value	70.30%	18.30%	(31.80%)
Ratios to Average Net Assets
Expense ratio	(1.55%)	(1.18%)	(1.20%)
Expense ratio, excluding brokerage commissions	(0.95%)	(0.95%)	(0.95%)
Net investment income (loss)	(1.50%)	(1.14%)	(1.15%)
ProShares UltraShort Gold [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 96.65	$ 103.5180	$ 63.8688
Net investment income (loss)	(0.9149)	(0.8233)	(0.7561)
Net realized and unrealized gain (loss)	20.1432	(6.0431)	40.4053
Change in net asset value from operations	19.2283	(6.8664)	39.6492
Net asset value, ending balance	115.88	96.65	103.5180
Market value per share, beginning balance	100.22	103.53	62.60
Market value per share, ending balance	$ 115.83	$ 100.22	$ 103.53
Total Return, at net asset value	19.90%	(6.60%)	62.10%
Total Return, at market value	15.60%	(3.20%)	65.40%
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)	(0.91%)	(0.91%)	(0.90%)
ProShares UltraShort Silver [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 57.81	$ 44.8910	$ 25.6975
Net investment income (loss)	(0.4968)	(0.3937)	(0.3112)
Net realized and unrealized gain (loss)	7.2680	13.3098	19.5047
Change in net asset value from operations	6.7712	12.9161	19.1935
Net asset value, ending balance	64.58	57.81	44.8910
Market value per share, beginning balance	59.70	45.10	25.04
Market value per share, ending balance	$ 64.55	$ 59.70	$ 45.10
Total Return, at net asset value	11.70%	28.80%	74.70%
Total Return, at market value	8.10%	32.40%	80.10%
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)	(0.91%)	(0.90%)	(0.89%)
ProShares Short Euro [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 40.06	$ 35.5867	$ 37.6285
Net investment income (loss)	(0.4096)	(0.3428)	(0.3430)
Net realized and unrealized gain (loss)	4.1246	4.8178	(1.6988)
Change in net asset value from operations	3.7150	4.4750	(2.0418)
Net asset value, ending balance	43.78	40.06	35.5867
Market value per share, beginning balance	40.03	35.66	37.64
Market value per share, ending balance	$ 43.74	$ 40.03	$ 35.66
Total Return, at net asset value	9.30%	12.60%	(5.40%)
Total Return, at market value	9.30%	12.30%	(5.30%)
Ratios to Average Net Assets
Expense ratio	(0.97%)	(0.96%)	(0.96%)
Expense ratio, excluding brokerage commissions	(0.95%)	(0.95%)	(0.95%)
Net investment income (loss)	(0.95%)	(0.93%)	(0.93%)
ProShares UltraShort Australian Dollar [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 51.38	$ 46.6384	$ 37.8081
Net investment income (loss)	(0.5741)	(0.4272)	(0.4325)
Net realized and unrealized gain (loss)	7.6533	5.1678	9.2628
Change in net asset value from operations	7.0792	4.7406	8.8303
Net asset value, ending balance	58.46	51.38	46.6384
Market value per share, beginning balance	51.37	46.66	37.74
Market value per share, ending balance	$ 58.15	$ 51.37	$ 46.66
Total Return, at net asset value	13.80%	10.20%	23.40%
Total Return, at market value	13.20%	10.10%	23.60%
Ratios to Average Net Assets
Expense ratio	(1.03%)	(1.01%)	(1.02%)
Expense ratio, excluding brokerage commissions	(0.95%)	(0.95%)	(0.95%)
Net investment income (loss)	(1.00%)	(0.97%)	(0.99%)
ProShares UltraShort Euro [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 21.59	$ 17.0613	$ 19.0172
Net investment income (loss)	(0.2256)	(0.1642)	(0.1677)
Net realized and unrealized gain (loss)	4.1716	4.6975	(1.7882)
Change in net asset value from operations	3.9460	4.5333	(1.9559)
Net asset value, ending balance	25.54	21.59	17.0613
Market value per share, beginning balance	21.61	17.06	19.01
Market value per share, ending balance	$ 25.53	$ 21.61	$ 17.06
Total Return, at net asset value	18.30%	26.60%	(10.30%)
Total Return, at market value	18.10%	26.70%	(10.30%)
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)	(0.90%)	(0.90%)	(0.90%)
ProShares UltraShort Yen [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 89.33	$ 70.8640	$ 50.7577
Net investment income (loss)	(0.8243)	(0.6412)	(0.5662)
Net realized and unrealized gain (loss)	(0.5704)	19.1108	20.6725
Change in net asset value from operations	(1.3947)	18.4696	20.1063
Net asset value, ending balance	87.94	89.33	70.8640
Market value per share, beginning balance	89.30	70.91	50.77
Market value per share, ending balance	$ 87.89	$ 89.30	$ 70.91
Total Return, at net asset value	(1.60%)	26.10%	39.60%
Total Return, at market value	(1.60%)	25.90%	39.70%
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)	(0.92%)	(0.90%)	(0.91%)
ProShares Ultra Bloomberg Commodity [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 52.13	$ 77.7259	$ 97.5491
Net investment income (loss)	(0.3491)	(0.7047)	(0.7780)
Net realized and unrealized gain (loss)	(23.3572)	(24.8870)	(19.0452)
Change in net asset value from operations	(23.7063)	(25.5917)	(19.8232)
Net asset value, ending balance	28.43	52.13	77.7259
Market value per share, beginning balance	51.44	76.52	95.72
Market value per share, ending balance	$ 28.07	$ 51.44	$ 76.52
Total Return, at net asset value	(45.50%)	(32.90%)	(20.30%)
Total Return, at market value	(45.40%)	(32.80%)	(20.10%)
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)	(0.93%)	(0.91%)	(0.90%)
ProShares Ultra Bloomberg Crude Oil [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 50.74	$ 160.4495	$ 146.9706
Net investment income (loss)	(0.2811)	(1.0928)	(1.4243)
Net realized and unrealized gain (loss)	(37.8815)	(108.6167)	14.9032
Change in net asset value from operations	(38.1626)	(109.7095)	13.4789
Net asset value, ending balance	12.58	50.74	160.4495
Market value per share, beginning balance	51.85	161.10	146.60
Market value per share, ending balance	$ 12.54	$ 51.85	$ 161.10
Total Return, at net asset value	(75.20%)	(68.40%)	9.20%
Total Return, at market value	(75.80%)	(67.80%)	9.90%
Ratios to Average Net Assets
Expense ratio	(1.02%)	(0.99%)	(0.97%)
Expense ratio, excluding brokerage commissions	(0.95%)	(0.95%)	(0.95%)
Net investment income (loss)	(0.98%)	(0.95%)	(0.92%)
ProShares Ultra Bloomberg Natural Gas [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 61.65	$ 155.3534	$ 156.1962
Net investment income (loss)	(0.4982)	(1.5167)	(1.6214)
Net realized and unrealized gain (loss)	(42.5811)	(92.1876)	0.7786
Change in net asset value from operations	(43.0793)	(93.7043)	(0.8428)
Net asset value, ending balance	18.57	61.65	155.3534
Market value per share, beginning balance	63.12	157.12	156.96
Market value per share, ending balance	$ 18.48	$ 63.12	$ 157.12
Total Return, at net asset value	(69.90%)	(60.30%)	(0.50%)
Total Return, at market value	(70.70%)	(59.80%)	0.10%
Ratios to Average Net Assets
Expense ratio	(1.29%)	(1.13%)	(1.15%)
Expense ratio, excluding brokerage commissions	(0.95%)	(0.95%)	(0.95%)
Net investment income (loss)	(1.26%)	(1.10%)	(1.10%)
ProShares Ultra Gold [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 40	$ 41.2553	$ 83.7634
Net investment income (loss)	(0.3292)	(0.4078)	(0.5404)
Net realized and unrealized gain (loss)	(9.9424)	(0.8464)	(41.9677)
Change in net asset value from operations	(10.2716)	(1.2542)	(42.5081)
Net asset value, ending balance	29.73	40	41.2553
Market value per share, beginning balance	38.41	41.26	85.34
Market value per share, ending balance	$ 29.73	$ 38.41	$ 41.26
Total Return, at net asset value	(25.70%)	(3.00%)	(50.70%)
Total Return, at market value	(22.60%)	(6.90%)	(51.70%)
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)	(0.90%)	(0.91%)	(0.89%)
ProShares Ultra Silver [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 39.37	$ 63.3305	$ 171.8906
Net investment income (loss)	(0.3258)	(0.5348)	(0.8789)
Net realized and unrealized gain (loss)	(11.9761)	(23.4300)	(107.6812)
Change in net asset value from operations	(12.3019)	(23.9648)	(108.5601)
Net asset value, ending balance	27.06	39.37	63.3305
Market value per share, beginning balance	38.05	63.04	176.40
Market value per share, ending balance	$ 27.08	$ 38.05	$ 63.04
Total Return, at net asset value	(31.30%)	(37.80%)	(63.20%)
Total Return, at market value	(28.80%)	(39.60%)	(64.30%)
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)	(0.89%)	(0.91%)	(0.89%)
ProShares Ultra Euro [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 19.87	$ 26.0346	$ 24.3499
Net investment income (loss)	(0.1505)	(0.2185)	(0.2200)
Net realized and unrealized gain (loss)	(4.2132)	(5.9417)	1.9047
Change in net asset value from operations	(4.3637)	(6.1602)	1.6847
Net asset value, ending balance	15.51	19.87	26.0346
Market value per share, beginning balance	19.80	25.98	24.32
Market value per share, ending balance	$ 15.51	$ 19.80	$ 25.98
Total Return, at net asset value	(22.00%)	(23.70%)	6.90%
Total Return, at market value	(21.70%)	(23.80%)	6.80%
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)	(0.93%)	(0.91%)	(0.90%)
ProShares Ultra Yen [Member]
Financial Highlights [Line Items]
Net asset value, beginning balance	$ 56.47	$ 74.5261	$ 112.7345
Net investment income (loss)	(0.4787)	(0.6693)	(0.7984)
Net realized and unrealized gain (loss)	(1.2433)	(17.3821)	(37.4100)
Change in net asset value from operations	(1.7220)	(18.0514)	(38.2084)
Net asset value, ending balance	54.75	56.47	74.5261
Market value per share, beginning balance	56.48	74.44	113.12
Market value per share, ending balance	$ 54.70	$ 56.48	$ 74.44
Total Return, at net asset value	(3.00%)	(24.20%)	(33.90%)
Total Return, at market value	(3.20%)	(24.10%)	(34.20%)
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)	(0.88%)	(0.90%)	(0.90%)

Financial Highlights - Per Sh46

Financial Highlights - Per Share Operating Performance (Parenthetical) (Detail) - ProShares Managed Futures Strategy [Member] - $ / shares	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financial Highlights [Line Items]
Net asset value	$ 20.53	$ 21.14	$ 20
Initial Offering Price [Member]
Financial Highlights [Line Items]
Net asset value		$ 20

Risk - Additional Information (

Risk - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015
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
Managed Futures Fund [Member] | ProShares Morningstar Alternatives Solution ETF [Member]
Unusual Risk or Uncertainty [Line Items]
Equity ownership percentage	51.40%

Uncategorized Items - ck0001415

Label	Element	Value
ProShares Managed Futures Strategy [Member]
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	$ 8,174,604
Unrealized Gain Loss on Investments on Securities	ck0001415311_UnrealizedGainLossOnInvestmentsOnSecurities	104,327
Stock Repurchased During Period, Value	us-gaap_StockRepurchasedDuringPeriodValue	2,039,561
Net Addition Redemption Of Shares	ck0001415311_NetAdditionRedemptionOfShares	6,135,043
Realized Investment Gains Losses on Securities	ck0001415311_RealizedInvestmentGainsLossesOnSecurities	$ 109,006