v2.4.0.8

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) (USD $) | 3 Months Ended
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Mar. 31, 2014
ProShares UltraShort DJ-UBS Commodity [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 76.00% |
Debt instrument, maturity date | $ 2,486,639 |
ProShares UltraShort DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.061% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.061% | [1]
Debt instrument, maturity date | Apr. 10, 2014 | [1]
ProShares UltraShort DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.046% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares UltraShort DJ-UBS Commodity [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% | [1]
Debt instrument, maturity date | Jun. 19, 2014 | [1]
ProShares UltraShort DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.070% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [1]
Debt instrument, maturity date | Aug. 14, 2014 | [1]
ProShares UltraShort DJ-UBS Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 91.00% |
Debt instrument, maturity date | 288,249,529 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.061% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.061% |
Debt instrument, maturity date | Apr. 10, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U,.S. Treasury Bills 0.075% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.075% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.080% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.08% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.093% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.093% |
Debt instrument, maturity date | Apr. 24, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.080% due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.08% | [1]
Debt instrument, maturity date | May 01, 2014 | [1]
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.088% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.088% | [1]
Debt instrument, maturity date | May 08, 2014 | [1]
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.034% due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.034% |
Debt instrument, maturity date | May 22, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S.Treasury Bills 0.076% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.076% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.043% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.043% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.054% due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.054% |
Debt instrument, maturity date | Jun. 19, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.046% due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% | [1]
Debt instrument, maturity date | Jun. 14, 2014 | [1]
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.049% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.049% | [1]
Debt instrument, maturity date | Jul. 10, 2014 | [1]
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S.Treasury Bills 0.056% due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.056% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.068% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.068% | [1]
Debt instrument, maturity date | Aug. 14, 2014 | [1]
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S.Treasury Bills 0.071% Due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.071% | [1]
Debt instrument, maturity date | Aug. 21, 2014 | [1]
ProShares UltraShort DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.071% Due 09/04/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.071% | [1]
Debt instrument, maturity date | Sep. 04, 2014 | [1]
ProShares UltraShort DJ-UBS Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 77.00% |
Debt instrument, maturity date | 56,750,896 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.059% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.059% |
Debt instrument, maturity date | Apr. 10, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.075% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.075% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.081% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.081% |
Debt instrument, maturity date | May 01, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.068% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.068% |
Debt instrument, maturity date | May 08, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S.Treasury Bills 0.036% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.036% |
Debt instrument, maturity date | Jun. 22, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S Treasury Bills 0.047% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.047% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.049% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.049% |
Debt instrument, maturity date | Jun. 19, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S.Treasury Bills 0.045% Due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 26, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.050% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.05% |
Debt instrument, maturity date | Jul. 10, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.050% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.05% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.067% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.067% |
Debt instrument, maturity date | Aug. 14, 2014 |
ProShares UltraShort DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.072% Due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.072% |
Debt instrument, maturity date | Aug. 21, 2014 |
ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 92.00% |
Debt instrument, maturity date | 105,836,793 |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.070% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [2]
Debt instrument, maturity date | Aug. 14, 2014 | [2]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.070% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.070% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% |
Debt instrument, maturity date | May 01, 2014 |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.075% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.075% | [2]
Debt instrument, maturity date | May 08, 2014 | [2]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills Zero 0.054% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.054% | [2]
Debt instrument, maturity date | Jun. 05, 2014 | [2]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.037% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.037% | [2]
Debt instrument, maturity date | Jun. 12, 2014 | [2]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.070% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [2]
Debt instrument, maturity date | Jun. 19, 2014 | [2]
ProShares UltraShort Gold [Member] | U.S Treasury Bills 0.058% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.058% | [2]
Debt instrument, maturity date | Aug. 07, 2014 | [2]
ProShares UltraShort Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 95.00% |
Debt instrument, maturity date | 67,185,974 |
ProShares UltraShort Silver [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% | [2]
Debt instrument, maturity date | Jun. 19, 2014 | [2]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.070% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [2]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.043% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.043% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.081% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.081% | [2]
Debt instrument, maturity date | May 01, 2014 | [2]
ProShares UltraShort Silver [Member] | U.S Treasury Bills 0.058% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.058% | [2]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.074% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.074% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.052% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.052% | [2]
Debt instrument, maturity date | May 22, 2014 | [2]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.073% Due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.073% | [2]
ProShares Short Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 88.00% |
Debt instrument, maturity date | 6,226,796 |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.046% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares Short Euro [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 19, 2014 |
ProShares Short Euro [Member] | U.S.Treasury Bills 0.071% Due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.071% |
Debt instrument, maturity date | Aug. 21, 2014 |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.086% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.086% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares UltraShort Australian Dollar [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 91.00% |
Debt instrument, maturity date | 19,226,421 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.088% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.088% |
Debt instrument, maturity date | May 08, 2014 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.073% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.073% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.066% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.066% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.085% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.085% |
Debt instrument, maturity date | Apr. 24, 2014 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.076% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.076% |
Debt instrument, maturity date | May 01, 2014 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.067% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.067% |
Debt instrument, maturity date | May 22, 2014 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.045% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 19, 2014 |
ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 101.00% |
Debt instrument, maturity date | 414,295,727 |
ProShares UltraShort Euro [Member] | U.S.Treasury Bills 0.071% Due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.071% | [3]
Debt instrument, maturity date | Aug. 21, 2014 | [3]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.081% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.081% |
Debt instrument, maturity date | May 01, 2014 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.050% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.05% | [3]
Debt instrument, maturity date | Jul. 10, 2014 | [3]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.070% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.086% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.086% | [3]
Debt instrument, maturity date | Jun. 12, 2014 | [3]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.083% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.083% | [3]
Debt instrument, maturity date | May 08, 2014 | [3]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.066% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.066% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.061% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.061% |
Debt instrument, maturity date | Aug. 14, 2014 |
ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 99.00% |
Debt instrument, maturity date | 400,704,523 |
ProShares UltraShort Yen [Member] | U.S.Treasury Bills 0.076% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.076% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.050% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.05% | [3]
Debt instrument, maturity date | Jul. 10, 2014 | [3]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.052% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.052% |
Debt instrument, maturity date | May 22, 2014 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.086% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.086% | [3]
Debt instrument, maturity date | Jun. 12, 2014 | [3]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.087% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.087% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.093% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.093% |
Debt instrument, maturity date | May 01, 2014 |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.086% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.086% | [3]
Debt instrument, maturity date | May 08, 2014 | [3]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.061% Due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.061% | [3]
Debt instrument, maturity date | Jun. 26, 2014 | [3]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.057% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.057% | [3]
Debt instrument, maturity date | Aug. 07, 2014 | [3]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.070% Due 08/28/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [3]
Debt instrument, maturity date | Aug. 28, 2014 | [3]
ProShares Ultra DJ-UBS Commodity [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 73.00% |
Debt instrument, maturity date | 2,410,744 |
ProShares Ultra DJ-UBS Commodity [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% | [1]
Debt instrument, maturity date | Jun. 19, 2014 | [1]
ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.081% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.081% | [1]
Debt instrument, maturity date | May 01, 2014 | [1]
ProShares Ultra DJ-UBS Commodity [Member] | U.S. Treasury Bills 0.066% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.066% | [1]
Debt instrument, maturity date | Jun. 05, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 110.00% |
Debt instrument, maturity date | 112,050,123 |
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.080% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.08% | [1]
Debt instrument, maturity date | Apr. 17, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S.Treasury Bills 0.076% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.076% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.049% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.049% | [1]
Debt instrument, maturity date | Jul. 10, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.073% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.073% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.085% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.085% |
Debt instrument, maturity date | Apr. 24, 2014 |
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.070% Due 08/28/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [1]
Debt instrument, maturity date | Aug. 28, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.077% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.077% |
Debt instrument, maturity date | Apr. 10, 2014 |
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.082% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.082% | [1]
Debt instrument, maturity date | May 01, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.035% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.035% | [1]
Debt instrument, maturity date | May 08, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.037% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.037% | [1]
Debt instrument, maturity date | May 22, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.035% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.035% | [1]
Debt instrument, maturity date | Jun. 12, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.056% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.056% | [1]
Debt instrument, maturity date | Jun. 19, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.035% Due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.035% |
Debt instrument, maturity date | Jun. 26, 2014 |
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.060% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.06% | [1]
Debt instrument, maturity date | Aug. 07, 2014 | [1]
ProShares Ultra DJ-UBS Crude Oil [Member] | U.S. Treasury Bills 0.067% Due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.067% | [1]
Debt instrument, maturity date | Aug. 21, 2014 | [1]
ProShares Ultra DJ-UBS Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 86.00% |
Debt instrument, maturity date | 18,277,464 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.061% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.061% |
Debt instrument, maturity date | Apr. 10, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.080% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.08% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S.Treasury Bills 0.076% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.076% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.049% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.049% |
Debt instrument, maturity date | Jul. 10, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.093% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.093% |
Debt instrument, maturity date | May 01, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.057% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.057% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.035% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.035% |
Debt instrument, maturity date | May 08, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S.Treasury Bills 0.074% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.074% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.082% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.082% |
Debt instrument, maturity date | Apr. 24, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.058% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.058% |
Debt instrument, maturity date | May 22, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.048% Due 06/12/1 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.048% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares Ultra DJ-UBS Natural Gas [Member] | U.S. Treasury Bills 0.073% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.073% |
Debt instrument, maturity date | Aug. 14, 2014 |
ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 109.00% |
Debt instrument, maturity date | 148,333,041 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.046% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares Ultra Gold [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% | [2]
Debt instrument, maturity date | Jun. 19, 2014 | [2]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.080% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.08% | [2]
Debt instrument, maturity date | Apr. 17, 2014 | [2]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.086% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.086% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.057% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.057% | [2]
Debt instrument, maturity date | Aug. 07, 2014 | [2]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.070% Due 08/28/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [2]
Debt instrument, maturity date | Aug. 24, 2014 | [2]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.070% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [2]
Debt instrument, maturity date | May 22, 2014 | [2]
ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 110.00% |
Debt instrument, maturity date | 530,685,172 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.046% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares Ultra Silver [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% | [2]
Debt instrument, maturity date | Jun. 19, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.070% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [2]
Debt instrument, maturity date | Aug. 14, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.080% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.08% | [2]
Debt instrument, maturity date | Apr. 17, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.093% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.093% | [2]
Debt instrument, maturity date | Apr. 24, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.088% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.088% | [2]
Debt instrument, maturity date | May 08, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.071% Due 09/04/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.071% | [2]
Debt instrument, maturity date | Sep. 04, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.070% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.093% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.093% |
Debt instrument, maturity date | May 01, 2014 |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.070% Due 08/28/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% | [2]
Debt instrument, maturity date | Aug. 28, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.066% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.066% | [2]
Debt instrument, maturity date | Apr. 10, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.033% due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.033% | [2]
Debt instrument, maturity date | May 22, 2014 | [2]
ProShares Ultra Silver [Member] | U.S.Treasury Bills 0.046% due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% | [2]
Debt instrument, maturity date | Jul. 10, 2014 | [2]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.067% due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.067% | [2]
Debt instrument, maturity date | Aug. 07, 2014 | [2]
ProShares Ultra Australian Dollar [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 81.00% |
Debt instrument, maturity date | 2,775,556 |
ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.046% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.086% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.086% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.065% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.065% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares Ultra Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 89.00% |
Debt instrument, maturity date | 2,307,628 |
ProShares Ultra Euro [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% | [3]
Debt instrument, maturity date | Jun. 19, 2014 | [3]
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.060% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.06% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.061% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.061% | [3]
Debt instrument, maturity date | Jun. 05, 2014 | [3]
ProShares Ultra Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 85.00% |
Debt instrument, maturity date | 2,471,639 |
ProShares Ultra Yen [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 19, 2014 |
ProShares Ultra Yen [Member] | U.S.Treasury Bills 0.045% Due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 26, 2014 |
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.050% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.05% | [3]
Debt instrument, maturity date | Jul. 10, 2014 | [3]
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.086% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.086% | [3]
Debt instrument, maturity date | Jun. 12, 2014 | [3]
ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 80.00% |
Debt instrument, maturity date | 94,147,330 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.046% Due 06/05/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% |
Debt instrument, maturity date | Jun. 05, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U,.S. Treasury Bills 0.075% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.075% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.068% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.068% |
Debt instrument, maturity date | May 08, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.045% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.035% Due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.035% |
Debt instrument, maturity date | Jun. 26, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.067% Due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.067% |
Debt instrument, maturity date | Aug. 21, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.082% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.082% |
Debt instrument, maturity date | Apr. 24, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.067% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.067% |
Debt instrument, maturity date | Apr. 10, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.077% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.077% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S Treasury Bills 0.048% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.048% |
Debt instrument, maturity date | Jul. 10, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.055% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.055% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.069% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.069% |
Debt instrument, maturity date | Aug. 14, 2014 |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.066% Due 09/04/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.066% |
Debt instrument, maturity date | Sep. 04, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Short-term U.S. government and agency obligations percentage of shareholders' equity | 84.00% |
Debt instrument, maturity date | 48,694,338 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.071% Due 09/04/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.071% |
Debt instrument, maturity date | Sep. 04, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.050% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.05% |
Debt instrument, maturity date | Jul. 10, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.066% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.066% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.045% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.086% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.086% |
Debt instrument, maturity date | May 08, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.057% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.057% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.067% Due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.067% |
Debt instrument, maturity date | Aug. 21, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.069% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.069% |
Debt instrument, maturity date | Aug. 14, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.071% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.071% |
Debt instrument, maturity date | Apr. 10, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.077% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.077% |
Debt instrument, maturity date | May 01, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.045% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | May 22, 2014 |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.037% Due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.037% |
Debt instrument, maturity date | Jun. 26, 2014 |
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 | 55.00% |
Debt instrument, maturity date | 173,848,340 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S.Treasury Bills 0.045% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.045% |
Debt instrument, maturity date | Jun. 19, 2014 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U,.S. Treasury Bills 0.075% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.075% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.087% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.087% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.035% Due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.035% |
Debt instrument, maturity date | Jun. 26, 2014 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.069% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.069% |
Debt instrument, maturity date | Aug. 14, 2014 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.068% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.068% |
Debt instrument, maturity date | Apr. 10, 2014 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.091% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.091% |
Debt instrument, maturity date | May 08, 2014 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.054% Due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.054% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.063% Due 09/04/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.063% |
Debt instrument, maturity date | Sep. 04, 2014 |
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 | 79.00% |
Debt instrument, maturity date | $ 169,484,257 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 06/12/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.043% |
Debt instrument, maturity date | Jun. 12, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.046% due 06/26/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.046% |
Debt instrument, maturity date | Jun. 26, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.068% Due 08/14/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.068% |
Debt instrument, maturity date | Aug. 14, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.081% Due 05/01/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.081% |
Debt instrument, maturity date | May 01, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.049% Due 06/19/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.049% |
Debt instrument, maturity date | Jun. 19, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.050% Due 07/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.05% |
Debt instrument, maturity date | Jul. 10, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.073% Due 04/03/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.073% |
Debt instrument, maturity date | Apr. 03, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.070% Due 08/28/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% |
Debt instrument, maturity date | Aug. 28, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.068% Due 04/10/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.068% |
Debt instrument, maturity date | Apr. 10, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.070% Due 04/17/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.07% |
Debt instrument, maturity date | Apr. 17, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.084% Due 04/24/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.084% |
Debt instrument, maturity date | Apr. 24, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.047% Due 05/08/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.047% |
Debt instrument, maturity date | May 08, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | US Treasury Bills 0.059% Due 05/22/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.059% |
Debt instrument, maturity date | May 22, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.053% due 08/07/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.053% |
Debt instrument, maturity date | Aug. 07, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.069% due 08/21/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.069% |
Debt instrument, maturity date | Aug. 21, 2014 |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 09/04/14 [Member] |  |
Schedule of Investments [Line Items] |  |
Interest rate | 0.061% |
Debt instrument, maturity date | Sep. 04, 2014 |
[1] | All or partial amount pledged as collateral for swap agreements.
[2] | All or partial amount pledged as collateral for forward agreements.
[3] | All or partial amount pledged as collateral for foreign currency forward contracts.

X
- Definition Short-term U.S. government and agency obligations, cost. + References No definition available. + Details
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Namespace Prefix: | ck0001415311_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Short term US government and agency obligations of shareholders equity. + References No definition available. + Details
Name: | ck0001415311_ShortTermUSGovernmentAndAgencyObligationsOfShareholdersEquity
Namespace Prefix: | ck0001415311_
Data Type: | num:percentItemType
Balance Type: | na
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