v3.10.0.1

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Detail) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017
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Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | $ 1,300,390,736 | $ 2,445,779,873
ProShares Short Euro [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 5,687,064 | 6,996,235
ProShares Short Euro [Member] | U.S Treasury Bills 1.771% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 400,000 |
Total short-term U.S. government and agency obligations, value | [1] | 399,669 |
ProShares Short Euro [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 300,000 |
Total short-term U.S. government and agency obligations, value | [1] | 299,541 |
ProShares Short Euro [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 4,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 3,992,337 |
ProShares Short Euro [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 400,000 |
Total short-term U.S. government and agency obligations, value | [1] | 398,781 |
ProShares Short Euro [Member] | U.S. Treasury Bills 1.886% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 199,238 |
ProShares Short Euro [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,917 |
ProShares Short Euro [Member] | U.S. Treasury Bills 1.990% due 11/08/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,581 |
ProShares Short VIX Short-Term Futures ETF [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 92,995,995 | 494,910,644
ProShares Short VIX Short-Term Futures ETF [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 93,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 92,995,995 |
ProShares Ultra Bloomberg Crude Oil [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 365,955,628 | 459,515,902
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 23,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 22,964,845 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 110,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 109,789,262 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 16,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 15,913,365 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.990% due 11/08/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 15,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 14,893,575 |
ProShares Ultra Bloomberg Crude Oil [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 14,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 13,999,397 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.741% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 37,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 36,994,790 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.787% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 40,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 39,966,944 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.884% due 08/16/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 3,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 2,993,175 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 27,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 26,917,696 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 30,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 29,885,634 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.895% due 09/27/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 13,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 12,940,780 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.946% due 10/25/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 12,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 11,925,442 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.036% due 11/23/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 12,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 11,903,520 |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 15,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 14,867,203 |
ProShares Ultra Bloomberg Natural Gas [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 17,960,426 | 50,961,356
ProShares Ultra Bloomberg Natural Gas [Member] | U.S Treasury Bills 1.771% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 999,174 |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 998,471 |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 1,996,168 |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.884% due 08/16/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 13,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 12,970,425 |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.890% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 996,188 |
ProShares Ultra Euro [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 3,289,040 | 6,996,235
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 300,000 |
Total short-term U.S. government and agency obligations, value | [1] | 299,541 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 300,000 |
Total short-term U.S. government and agency obligations, value | [1] | 299,085 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,917 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.990% due 11/08/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,581 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 400,000 |
Total short-term U.S. government and agency obligations, value | [1] | 398,475 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.895% due 09/27/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 199,089 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.946% due 10/25/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 100,000 |
Total short-term U.S. government and agency obligations, value | [1] | 99,379 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 2.036% due 11/23/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,392 |
ProShares Ultra Euro [Member] | United States Treasury Bills One Point Seven Three Seven Percentage Due July Five Two Thousand And Eighteen [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 500,000 |
Total short-term U.S. government and agency obligations, value | [1] | 499,930 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 1.795% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 700,000 |
Total short-term U.S. government and agency obligations, value | [1] | 699,422 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,229 |
ProShares Ultra Gold [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 87,847,390 | 88,884,844
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 5,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 4,992,357 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 6,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 5,981,710 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 3,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 2,983,756 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.990% due 11/08/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 3,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 2,978,715 |
ProShares Ultra Gold [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[4] | 41,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 40,998,234 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.741% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 8,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 7,998,874 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.884% due 08/16/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 997,725 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 6,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 5,977,127 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.895% due 09/27/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 1,990,889 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.946% due 10/25/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 1,987,574 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 2.036% due 11/23/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 1,983,920 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 1,982,294 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 1.783% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 6,994,215 |
ProShares Ultra Silver [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 212,508,884 | 235,581,716
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 12,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 11,981,658 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 20,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 19,961,684 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 14,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 13,957,324 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 8,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 7,956,683 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.990% due 11/08/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 8,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 7,943,240 |
ProShares Ultra Silver [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 56,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 55,997,588 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.741% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 20,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 19,997,184 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.884% due 08/16/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 13,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 12,970,425 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 16,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 15,939,005 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.895% due 09/27/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 6,968,112 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.946% due 10/25/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 6,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 5,962,721 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 2.036% due 11/23/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 6,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 5,951,760 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[3] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[3] | 6,938,028 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 1.785% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 20,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 19,983,472 |
ProShares Ultra Yen [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 998,084 | 1,997,933
ProShares Ultra Yen [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 998,084 |
ProShares UltraShort Australian Dollar [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 4,988,329 | 11,983,904
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,917 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.990% due 11/08/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 100,000 |
Total short-term U.S. government and agency obligations, value | [1] | 99,291 |
ProShares UltraShort Australian Dollar [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 999,957 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 400,000 |
Total short-term U.S. government and agency obligations, value | [1] | 398,475 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.895% due 09/27/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 100,000 |
Total short-term U.S. government and agency obligations, value | [1] | 99,544 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 1.946% due 10/25/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 100,000 |
Total short-term U.S. government and agency obligations, value | [1] | 99,379 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 2.036% due 11/23/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,392 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 198,229 |
ProShares UltraShort Australian Dollar [Member] | US Treasury Bills 1.737% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 500,000 |
Total short-term U.S. government and agency obligations, value | [1] | 499,930 |
ProShares UltraShort Australian Dollar [Member] | United States Treasury Bills 1.792% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 600,000 |
Total short-term U.S. government and agency obligations, value | [1] | 599,504 |
ProShares UltraShort Australian Dollar [Member] | US Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 300,000 |
Total short-term U.S. government and agency obligations, value | [1] | 299,541 |
ProShares UltraShort Australian Dollar [Member] | US Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 998,084 |
ProShares UltraShort Australian Dollar [Member] | US Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 300,000 |
Total short-term U.S. government and agency obligations, value | [1] | 299,086 |
ProShares UltraShort Bloomberg Crude Oil [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 173,652,213 | 253,646,823
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 10,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 9,984,715 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [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] | 4,990,421 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 12,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 11,963,420 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 6,962,097 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.990% due 11/08/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 6,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 5,957,430 |
ProShares UltraShort Bloomberg Crude Oil [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 70,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 69,996,985 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.741% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 15,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 14,997,888 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 12,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 11,954,254 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.895% due 09/27/18 [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] | 4,977,223 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 1.946% due 10/25/18 [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] | 3,975,147 |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 6,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 5,946,882 |
ProShares UltraShort Bloomberg Crude Oil [Member] | United States Treasury Bills 1.786% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 17,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 16,985,951 |
ProShares UltraShort Bloomberg Crude Oil [Member] | United States Treasury Bills 2.036% due 11/23/18 [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] | 4,959,800 |
ProShares UltraShort Bloomberg Natural Gas [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 4,093,202 | 3,999,751
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 100,000 |
Total short-term U.S. government and agency obligations, value | [1] | 99,458 |
ProShares UltraShort Bloomberg Natural Gas [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 999,957 |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 199,238 |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 100,000 |
Total short-term U.S. government and agency obligations, value | [1] | 99,115 |
ProShares UltraShort Bloomberg Natural Gas [Member] | US Treasury Bills 1.737% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 200,000 |
Total short-term U.S. government and agency obligations, value | [1] | 199,972 |
ProShares UltraShort Bloomberg Natural Gas [Member] | US Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 100,000 |
Total short-term U.S. government and agency obligations, value | [1] | 99,847 |
ProShares UltraShort Bloomberg Natural Gas [Member] | US Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 1,996,168 |
ProShares UltraShort Bloomberg Natural Gas [Member] | US Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 100,000 |
Total short-term U.S. government and agency obligations, value | [1] | 99,695 |
ProShares UltraShort Bloomberg Natural Gas [Member] | US Treasury Bills 1.799% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 300,000 |
Total short-term U.S. government and agency obligations, value | [1] | 299,752 |
ProShares UltraShort Euro [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 141,652,985 | 204,770,166
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 11,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 10,983,187 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 30,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 29,942,526 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 8,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 7,975,614 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 6,962,097 |
ProShares UltraShort Euro [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 14,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 13,999,397 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.741% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 16,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 15,997,747 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.884% due 08/16/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 8,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 7,981,800 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 13,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 12,950,441 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.895% due 09/27/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 5,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 4,977,223 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 2.036% due 11/23/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 5,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 4,959,800 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 6,938,028 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 1.785% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 18,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 17,985,125 |
ProShares UltraShort Gold [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 22,954,734 | 31,977,900
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 998,471 |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [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] | 9,980,842 |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 996,952 |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.886% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 996,188 |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 1.884% due 08/16/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 6,984,075 |
ProShares UltraShort Gold [Member] | US Treasury Bills 1.737% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 999,859 |
ProShares UltraShort Gold [Member] | United States Treasury Bills 1.792% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value | [1] | 1,998,347 |
ProShares UltraShort Gold [Member] | US Treasury Bills One Point Seven Nine Five Percentage Due July Nineteen Two Thousand and Eighteen [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 2,000,000 |
ProShares UltraShort Silver [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 19,972,425 | 18,349,861
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.831% due 08/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 998,471 |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 6,986,589 |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.907% due 08/30/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 996,952 |
ProShares UltraShort Silver [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 6,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 5,999,742 |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.884% due 08/16/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 1,995,450 |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 1.890% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[2] | 996,188 |
ProShares UltraShort Silver [Member] | US Treasury Bills 1.743% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 999,859 |
ProShares UltraShort Silver [Member] | US Treasury Bills 1.771% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 1,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 999,174 |
ProShares UltraShort Yen [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 80,837,136 | 131,834,352
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.871% due 08/09/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 10,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 9,980,842 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.934% due 10/11/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 3,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 2,983,756 |
ProShares UltraShort Yen [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 22,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 21,999,053 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.741% due 07/05/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 6,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 5,999,155 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.884% due 08/16/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[2] | 20,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 19,954,500 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.888% due 09/13/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 5,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 4,980,939 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.895% due 09/27/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 1,990,889 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.946% due 10/25/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 1,987,573 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 2.049% due 12/06/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1],[5] | 1,982,294 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 1.783% due 07/19/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 7,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 6,994,215 |
ProShares UltraShort Yen [Member] | United States Treasury Bills 2.036% due 11/23/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1],[5] | 2,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 1,983,920 |
ProShares VIX Short-Term Futures ETF [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 21,999,053 | 134,845,604
ProShares VIX Short-Term Futures ETF [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 22,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | 21,999,053 |
ProShares Ultra VIX Short-Term Futures ETF [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Total short-term U.S. government and agency obligations, value |  | 42,998,148 | $ 287,533,132
ProShares Ultra VIX Short-Term Futures ETF [Member] | Federal Home Loan Discount Notes 1.551% due 07/02/18 [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Principal Amount | [1] | 43,000,000 |
Total short-term U.S. government and agency obligations, value | [1] | $ 42,998,148 |
[1] | Rates shown represent discount rate at the time of purchase.
[2] | All or partial amount pledged as collateral for swap agreements.
[3] | All or partial amount pledged as collateral for forward agreements.
[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] | All or partial amount pledged as collateral for foreign currency forward contracts.

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