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

[1] All or partial amount pledged as collateral for futures contracts.

[2] Rates shown represents discount rate at the time of purchase.

[3] All or partial amount pledged as collateral for swap agreements and/or futures contracts.

[4] All or partial amount pledged as collateral for forward agreements and/or futures contracts.

[5] All or partial amount pledged as collateral for foreign currency forward contracts.

[6] Rates shown represents discount rate at the time of purchase.

[7] Rates shown represents discount rate at the time of the purchase.

[8] All or partial amount pledged as collateral for swap agreements and/or futures contracts.

[9] Rates shown represents discount rate at the time of the purchase.