v3.8.0.1

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) | 9 Months Ended
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Sep. 30, 2017 USD ($)
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and agency obligations, cost | $ 3,181,464,501 |
ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 98.00% |
Total short-term U.S. government and agency obligations, cost | $ 186,708,857 |
ProShares VIX Mid-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 80.00% |
Total short-term U.S. government and agency obligations, cost | $ 35,953,365 |
ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 74.00% |
Total short-term U.S. government and agency obligations, cost | $ 770,073,989 |
ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 97.00% |
Total short-term U.S. government and agency obligations, cost | $ 521,285,333 |
ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 104.00% |
Total short-term U.S. government and agency obligations, cost | $ 246,653,071 |
ProShares UltraShort Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 51.00% |
Total short-term U.S. government and agency obligations, cost | $ 2,998,485 |
ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 99.00% |
Total short-term U.S. government and agency obligations, cost | $ 34,939,314 |
ProShares UltraShort Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 78.00% |
Total short-term U.S. government and agency obligations, cost | $ 17,965,709 |
ProShares Short Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 74.00% |
Total short-term U.S. government and agency obligations, cost | $ 5,998,008 |
ProShares UltraShort Australian Dollar [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 88.00% |
Total short-term U.S. government and agency obligations, cost | $ 7,997,344 |
ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 97.00% |
Total short-term U.S. government and agency obligations, cost | $ 219,674,153 |
ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 93.00% |
Total short-term U.S. government and agency obligations, cost | $ 137,812,663 |
ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 90.00% |
Total short-term U.S. government and agency obligations, cost | $ 562,320,399 |
ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 84.00% |
Total short-term U.S. government and agency obligations, cost | $ 42,918,384 |
ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 114.00% |
Total short-term U.S. government and agency obligations, cost | $ 101,893,747 |
ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 111.00% |
Total short-term U.S. government and agency obligations, cost | $ 270,613,725 |
ProShares Ultra Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 80.00% |
Total short-term U.S. government and agency obligations, cost | $ 10,995,458 |
ProShares Ultra Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 80.00% |
Total short-term U.S. government and agency obligations, cost | $ 4,662,497 |
U.S. Treasury Bills 0.998% due 10/05/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.998% | [1]
Debt instrument, maturity date | Oct. 05, 2017 | [1]
U.S. Treasury Bills 0.998% due 10/05/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.998% | [1]
Debt instrument, maturity date | Oct. 05, 2017 | [1]
U.S. Treasury Bills 0.998% due 10/05/17 [Member] | ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.998% | [1]
Debt instrument, maturity date | Oct. 05, 2017 | [1]
U.S. Treasury Bills 1.043% due 10/12/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.043% | [1]
Debt instrument, maturity date | Oct. 12, 2017 | [1]
U.S. Treasury Bills 0.928% due 10/19/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.928% | [1]
Debt instrument, maturity date | Oct. 19, 2017 | [1]
U.S. Treasury Bills 1.037% due 10/26/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.037% | [1],[2]
Debt instrument, maturity date | Oct. 26, 2017 | [1],[2]
U.S. Treasury Bills 1.013% due 11/02/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1],[2]
Debt instrument, maturity date | Nov. 02, 2017 | [1],[2]
U.S. Treasury Bills 1.013% due 11/02/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1]
Debt instrument, maturity date | Nov. 02, 2017 | [1]
U.S. Treasury Bills 1.013% due 11/02/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1],[2]
Debt instrument, maturity date | Nov. 02, 2017 | [1],[2]
U.S. Treasury Bills 1.013% due 11/02/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1],[3]
Debt instrument, maturity date | Nov. 02, 2017 | [1],[3]
U.S. Treasury Bills 1.013% due 11/02/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1]
Debt instrument, maturity date | Nov. 02, 2017 | [1]
U.S. Treasury Bills 1.023% due 11/09/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.023% | [1],[2]
Debt instrument, maturity date | Nov. 09, 2017 | [1],[2]
U.S. Treasury Bills 1.023% due 11/09/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.023% | [1]
Debt instrument, maturity date | Nov. 09, 2017 | [1]
U.S. Treasury Bills 1.023% due 11/09/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.023% | [1]
Debt instrument, maturity date | Nov. 09, 2017 | [1]
U.S. Treasury Bills 0.988% due 11/16/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.988% | [1],[2]
Debt instrument, maturity date | Nov. 16, 2017 | [1],[2]
U.S. Treasury Bills 0.962% due 11/30/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.962% | [1],[2]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[2]
U.S. Treasury Bills 0.962% due 11/30/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.962% | [1],[3]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[3]
U.S. Treasury Bills 0.962% due 11/30/17 [Member] | ProShares UltraShort Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.962% | [1],[4]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[4]
U.S. Treasury Bills 0.962% due 11/30/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.962% | [1],[4]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[4]
U.S. Treasury Bills 0.962% due 11/30/17 [Member] | ProShares Ultra Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.962% | [1]
Debt instrument, maturity date | Nov. 30, 2017 | [1]
U.S. Treasury Bills 1.033% due 12/07/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.033% | [1],[2]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[2]
U.S. Treasury Bills 0.987% due 12/14/17 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.987% | [1],[2]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[2]
U.S. Treasury Bills 0.987% due 12/14/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.987% | [1],[2]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[2]
U.S. Treasury Bills 0.987% due 12/14/17 [Member] | ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.987% | [1],[4]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[4]
U.S. Treasury Bills 0.987% due 12/14/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.987% | [1],[5]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[5]
U.S. Treasury Bills 0.987% due 12/14/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.987% | [1],[3]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[3]
U.S. Treasury Bills 0.987% due 12/14/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.987% | [1]
Debt instrument, maturity date | Dec. 14, 2017 | [1]
U.S. Treasury Bills 0.987% due 12/14/17 [Member] | ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.987% | [1],[4]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[4]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1],[2]
Debt instrument, maturity date | Jan. 11, 2018 | [1],[2]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares Ultra Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 0.992% due 10/26/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.992% | [1]
Debt instrument, maturity date | Oct. 26, 2017 | [1]
U.S. Treasury Bills 0.992% due 10/26/17 [Member] | ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.992% | [1]
Debt instrument, maturity date | Oct. 26, 2017 | [1]
U.S. Treasury Bills 0.992% due 10/26/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.992% | [1]
Debt instrument, maturity date | Oct. 26, 2017 | [1]
U.S. Treasury Bills 0.977% due 11/16/17 [Member] | ProShares VIX Mid-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.977% | [1]
Debt instrument, maturity date | Nov. 16, 2017 | [1]
U.S. Treasury Bills 1.001% due 01/11/18 [Member] | ProShares VIX Mid-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Jan. 11, 2018 | [1]
U.S. Treasury Bills1.041% due 10/19/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.041% | [1]
Debt instrument, maturity date | Oct. 19, 2017 | [1]
U.S. Treasury Bills 1.048% due 10/26/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.048% | [1]
Debt instrument, maturity date | Oct. 26, 2017 | [1]
U.S. Treasury Bills 1.001% due 11/02/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.001% | [1]
Debt instrument, maturity date | Nov. 02, 2017 | [1]
U.S. Treasury Bills 1.029% due 11/09/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.029% | [1]
Debt instrument, maturity date | Nov. 09, 2017 | [1]
U.S. Treasury Bills 0.986% due 11/16/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.986% | [1],[2]
Debt instrument, maturity date | Nov. 16, 2017 | [1],[2]
U.S. Treasury Bills 0.986% due 11/16/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.986% | [1],[2]
Debt instrument, maturity date | Nov. 16, 2017 | [1],[2]
U.S. Treasury Bills 0.986% due 11/16/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.986% | [1],[3]
Debt instrument, maturity date | Nov. 16, 2017 | [1],[3]
U.S. Treasury Bills 0.999% due 11/24/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.999% | [1]
Debt instrument, maturity date | Nov. 24, 2017 | [1]
U.S. Treasury Bills 1.005% due 11/30/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.005% | [1],[2]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[2]
U.S. Treasury Bills 1.023% due 12/07/17 [Member] | ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.023% | [1],[2]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[2]
U.S. Treasury Bills 1.023% due 12/07/17 [Member] | ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.023% | [1],[4]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[4]
U.S. Treasury Bills 1.013% due 10/19/17 [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1]
Debt instrument, maturity date | Oct. 19, 2017 | [1]
U.S. Treasury Bills 1.013% due 10/19/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1]
Debt instrument, maturity date | Oct. 19, 2017 | [1]
U.S. Treasury Bills 1.062% due 10/05/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.062% | [1]
Debt instrument, maturity date | Oct. 05, 2017 | [1]
U.S. Treasury Bills 1.062% due 10/05/17 [Member] | ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.062% | [1],[4]
Debt instrument, maturity date | Oct. 05, 2017 | [1],[4]
U.S. Treasury Bills 0.991% due 11/30/17 [Member] | ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.991% | [1],[4]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[4]
U.S. Treasury Bills 0.972% due 12/07/17 [Member] | ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.972% | [1],[4]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[4]
U.S. Treasury Bills 1.002% due 01/04/18 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.002% | [1]
Debt instrument, maturity date | Jan. 04, 2018 | [1]
U.S. Treasury Bills 1.002% due 01/04/18 [Member] | ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.002% | [1]
Debt instrument, maturity date | Jan. 04, 2018 | [1]
U.S. Treasury Bills 1.002% due 01/04/18 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.002% | [1]
Debt instrument, maturity date | Jan. 04, 2018 | [1]
U.S. Treasury Bills 1.002% due 01/04/18 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.002% | [1]
Debt instrument, maturity date | Jan. 04, 2018 | [1]
U.S. Treasury Bills 1.002% due 01/04/18 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.002% | [1]
Debt instrument, maturity date | Jan. 04, 2018 | [1]
U.S. Treasury Bills 1.088% due 10/26/17 [Member] | ProShares UltraShort Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.088% | [1],[4]
Debt instrument, maturity date | Oct. 26, 2017 | [1],[4]
U.S. Treasury Bills 1.012% due 12/07/17 [Member] | ProShares UltraShort Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.012% | [1],[4]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[4]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares UltraShort Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.089% due 10/12/17 [Member] | ProShares Short Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.089% | [1]
Debt instrument, maturity date | Oct. 12, 2017 | [1]
U.S. Treasury Bills 1.089% due 10/12/17 [Member] | ProShares UltraShort Australian Dollar [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.089% | [1]
Debt instrument, maturity date | Oct. 12, 2017 | [1]
U.S. Treasury Bills 1.089% due 10/12/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.089% | [1]
Debt instrument, maturity date | Oct. 12, 2017 | [1]
U.S. Treasury Bills 1.089% due 10/12/17 [Member] | ProShares Ultra Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.089% | [1],[5]
Debt instrument, maturity date | Oct. 12, 2017 | [1],[5]
U.S. Treasury Bills 1.057% due 10/12/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.057% | [1],[5]
Debt instrument, maturity date | Oct. 12, 2017 | [1],[5]
U.S. Treasury Bills 1.013% due 10/19/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1],[5]
Debt instrument, maturity date | Oct. 19, 2017 | [1],[5]
U.S. Treasury Bills 1.013% due 10/19/17 [Member] | ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1],[4]
Debt instrument, maturity date | Oct. 19, 2017 | [1],[4]
U.S. Treasury Bills 1.013% due 10/19/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.013% | [1],[4]
Debt instrument, maturity date | Oct. 19, 2017 | [1],[4]
U.S. Treasury Bills 1.015% due 10/26/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.015% | [1],[5]
Debt instrument, maturity date | Oct. 26, 2017 | [1],[5]
U.S. Treasury Bills 0.998% due 11/02/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.998% | [1]
Debt instrument, maturity date | Nov. 02, 2017 | [1]
U.S. Treasury Bills 1.079% due 11/09/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.079% | [1],[3]
Debt instrument, maturity date | Nov. 09, 2017 | [1],[3]
U.S. Treasury Bills 1.079% due 11/09/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.079% | [1],[5]
Debt instrument, maturity date | Nov. 09, 2017 | [1],[5]
U.S. Treasury Bills 1.079% due 11/09/17 [Member] | ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.079% | [1],[5]
Debt instrument, maturity date | Nov. 09, 2017 | [1],[5]
U.S. Treasury Bills 1.079% due 11/09/17 [Member] | ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.079% | [1],[4]
Debt instrument, maturity date | Nov. 09, 2017 | [1],[4]
U.S. Treasury Bills 1.079% due 11/09/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.079% | [1],[4]
Debt instrument, maturity date | Nov. 09, 2017 | [1],[4]
U.S. Treasury Bills 0.982% due 11/16/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.982% | [1],[5]
Debt instrument, maturity date | Nov. 16, 2017 | [1],[5]
U.S. Treasury Bills 0.962% due 11/30/17 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.962% | [1],[5]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[5]
U.S. Treasury Bills 0.962% due 11/30/17 [Member] | ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.962% | [1],[5]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[5]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.011% due 10/05/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.011% | [1],[2]
Debt instrument, maturity date | Oct. 05, 2017 | [1],[2]
U.S. Treasury Bills 1.067% due 10/12/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.067% | [1],[2]
Debt instrument, maturity date | Oct. 12, 2017 | [1],[2]
U.S. Treasury Bills 1.081% due 10/19/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.081% | [1],[2]
Debt instrument, maturity date | Oct. 19, 2017 | [1],[2]
U.S. Treasury Bills 1.000% due 10/26/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.00% | [1],[2]
Debt instrument, maturity date | Oct. 26, 2017 | [1],[2]
U.S. Treasury Bills 0.957% due 11/09/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.957% | [1],[2]
Debt instrument, maturity date | Nov. 09, 2017 | [1],[2]
U.S. Treasury Bills 0.999% due 11/30/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.999% | [1],[2]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[2]
U.S. Treasury Bills 1.002% due 12/07/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.002% | [1],[2]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[2]
U.S. Treasury Bills 1.000% due 12/14/17 [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.00% | [1],[2]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[2]
U.S. Treasury Bills 1.065% due 10/12/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.065% | [1]
Debt instrument, maturity date | Oct. 12, 2017 | [1]
U.S. Treasury Bills 1.070% due 10/19/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.07% | [1],[3]
Debt instrument, maturity date | Oct. 19, 2017 | [1],[3]
U.S. Treasury Bills 1.070% due 10/19/17 [Member] | ProShares Ultra Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.07% | [1],[5]
Debt instrument, maturity date | Oct. 19, 2017 | [1],[5]
U.S. Treasury Bills 1.042% due 10/26/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.042% | [1],[3]
Debt instrument, maturity date | Oct. 26, 2017 | [1],[3]
U.S. Treasury Bills 0.991% due 12/07/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.991% | [1],[3]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[3]
U.S. Treasury Bills 0.989% due 12/14/17 [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.989% | [1],[3]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[3]
U.S. Treasury Bills 1.053% due 10/05/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.053% | [1]
Debt instrument, maturity date | Oct. 05, 2017 | [1]
U.S. Treasury Bills 1.077% due 10/19/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.077% | [1],[3]
Debt instrument, maturity date | Oct. 19, 2017 | [1],[3]
U.S. Treasury Bills 1.055% due 10/26/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.055% | [1],[3]
Debt instrument, maturity date | Oct. 26, 2017 | [1],[3]
U.S. Treasury Bills 1.062% due 11/02/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.062% | [1],[3]
Debt instrument, maturity date | Nov. 02, 2017 | [1],[3]
U.S. Treasury Bills 1.077% due 11/09/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.077% | [1],[3]
Debt instrument, maturity date | Nov. 09, 2017 | [1],[3]
U.S. Treasury Bills 0.977% due 11/16/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.977% | [1],[3]
Debt instrument, maturity date | Nov. 16, 2017 | [1],[3]
U.S. Treasury Bills 0.977% due 11/16/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.977% | [1],[4]
Debt instrument, maturity date | Nov. 16, 2017 | [1],[4]
U.S. Treasury Bills 0.982% due 11/30/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.982% | [1],[3]
Debt instrument, maturity date | Nov. 30, 2017 | [1],[3]
U.S. Treasury Bills 0.970% due 12/07/17 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.97% | [1],[3]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[3]
U.S. Treasury Bills 1.040% due 02/01/18 [Member] | ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.04% | [1]
Debt instrument, maturity date | Feb. 01, 2018 | [1]
U.S. Treasury Bills 1.108% due 10/12/17 [Member] | ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.108% | [1]
Debt instrument, maturity date | Oct. 12, 2017 | [1]
U.S. Treasury Bills 1.018% due 10/05/17 [Member] | ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.018% | [1]
Debt instrument, maturity date | Oct. 05, 2017 | [1]
U.S. Treasury Bills 1.046% due 10/12/17 [Member] | ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.046% | [1],[4]
Debt instrument, maturity date | Oct. 12, 2017 | [1],[4]
U.S. Treasury Bills 1.015% due 10/05/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.015% | [1]
Debt instrument, maturity date | Oct. 05, 2015 | [1]
U.S. Treasury Bills 1.056% due 10/12/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.056% | [1],[4]
Debt instrument, maturity date | Oct. 12, 2017 | [1],[4]
U.S. Treasury Bills 1.036% due 10/26/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.036% | [1],[4]
Debt instrument, maturity date | Oct. 26, 2017 | [1],[4]
U.S. Treasury Bills 1.076% due 11/02/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.076% | [1],[4]
Debt instrument, maturity date | Nov. 02, 2017 | [1],[4]
U.S. Treasury Bills 1.004% due 12/07/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.004% | [1],[4]
Debt instrument, maturity date | Dec. 07, 2017 | [1],[4]
U.S. Treasury Bills 0.987% due 12/14/17 [Member] | ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 0.987% | [1],[4]
Debt instrument, maturity date | Dec. 14, 2017 | [1],[4]
U.S. Treasury Bills 1.025% due 10/12/17 [Member] | ProShares Ultra Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.025% | [1],[5]
Debt instrument, maturity date | Oct. 12, 2017 | [1],[5]
U.S. Treasury Bills 1.075% due 10/12/17 [Member] | ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 1.075% | [1],[5]
Debt instrument, maturity date | Oct. 12, 2017 | [1],[5]
[1] | Rates shown represents discount rate at the time of purchase.
[2] | All or partial amount pledged as collateral for futures contracts.
[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.

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