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Financial Highlights - Per Share Operating Performance (Detail) (USD $)
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3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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ProShares UltraShort Bloomberg Commodity [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 54.7316 | $ 55.1027 | $ 63.2936 | $ 54.1021 |
| Net investment income (loss) | $ (0.1211) | $ (0.1323) | $ (0.2543) | $ (0.2467) |
| Net realized and unrealized gain (loss) | $ (0.3675) | $ 10.9199 | $ (8.7963) | $ 12.0349 |
| Change in net asset value from operations | $ (0.4886) | $ 10.7876 | $ (9.0506) | $ 11.7882 |
| Net asset value, ending balance | $ 54.2430 | $ 65.8903 | $ 54.2430 | $ 65.8903 |
| Market value per share, beginning balance | $ 55.25 | $ 51.14 | $ 58.41 | $ 51.64 |
| Market value per share, ending balance | $ 52.00 | $ 64.97 | $ 52.00 | $ 64.97 |
| Total Return, at net asset value | (0.90%) | 19.60% | (14.30%) | 21.80% |
| Total Return, at market value | (5.90%) | 27.00% | (11.00%) | 25.80% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.91%) | (0.89%) | (0.91%) | (0.88%) |
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ProShares UltraShort Bloomberg Crude Oil [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 28.4845 | $ 36.4792 | $ 31.7301 | $ 40.3079 |
| Net investment income (loss) | $ (0.0623) | $ (0.0890) | $ (0.1298) | $ (0.1744) |
| Net realized and unrealized gain (loss) | $ (3.7890) | $ (0.0509) | $ (6.9671) | $ (3.7942) |
| Change in net asset value from operations | $ (3.8513) | $ (0.1399) | $ (7.0969) | $ (3.9686) |
| Net asset value, ending balance | $ 24.6332 | $ 36.3393 | $ 24.6332 | $ 36.3393 |
| Market value per share, beginning balance | $ 28.54 | $ 36.62 | $ 31.58 | $ 40.44 |
| Market value per share, ending balance | $ 24.61 | $ 36.45 | $ 24.61 | $ 36.45 |
| Total Return, at net asset value | (13.50%) | (0.40%) | (22.40%) | (9.80%) |
| Total Return, at market value | (13.80%) | (0.50%) | (22.10%) | (9.90%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.98%) | (0.99%) | (0.98%) | (0.98%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.94%) | (0.94%) | (0.93%) | (0.92%) |
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ProShares UltraShort Bloomberg Natural Gas [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 43.9084 | $ 71.8641 | $ 69.9635 | $ 102.1402 |
| Net investment income (loss) | $ (0.1094) | $ (0.2013) | $ (0.2303) | $ (0.4363) |
| Net realized and unrealized gain (loss) | $ (3.2407) | $ 16.9096 | $ (29.1749) | $ (13.1315) |
| Change in net asset value from operations | $ (3.3501) | $ 16.7083 | $ (29.4052) | $ (13.5678) |
| Net asset value, ending balance | $ 40.5583 | $ 88.5724 | $ 40.5583 | $ 88.5724 |
| Market value per share, beginning balance | $ 43.71 | $ 72.24 | $ 69.36 | $ 101.64 |
| Market value per share, ending balance | $ 40.43 | $ 88.00 | $ 40.43 | $ 88.00 |
| Total Return, at net asset value | (7.60%) | 23.20% | (42.00%) | (13.30%) |
| Total Return, at market value | (7.50%) | 21.80% | (41.70%) | (13.40%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (1.15%) | (1.22%) | (1.16%) | (1.21%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (1.11%) | (1.16%) | (1.12%) | (1.15%) |
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ProShares UltraShort Gold [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 88.2955 | $ 67.8681 | $ 103.5180 | $ 63.8688 |
| Net investment income (loss) | $ (0.1972) | $ (0.1885) | $ (0.3952) | $ (0.3363) |
| Net realized and unrealized gain (loss) | $ (4.1015) | $ 46.4189 | $ (19.1260) | $ 50.5660 |
| Change in net asset value from operations | $ (4.2987) | $ 46.2304 | $ (19.5212) | $ 50.2297 |
| Net asset value, ending balance | $ 83.9968 | $ 114.0985 | $ 83.9968 | $ 114.0985 |
| Market value per share, beginning balance | $ 89.45 | $ 68.01 | $ 103.53 | $ 62.60 |
| Market value per share, ending balance | $ 82.11 | $ 106.50 | $ 82.11 | $ 106.50 |
| Total Return, at net asset value | (4.90%) | 68.10% | (18.90%) | 78.60% |
| Total Return, at market value | (8.20%) | 56.60% | (20.70%) | 70.10% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.90%) | (0.90%) | (0.90%) | (0.89%) |
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ProShares UltraShort Silver [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 82.7317 | $ 54.0616 | $ 89.7820 | $ 51.3951 |
| Net investment income (loss) | $ (0.1892) | $ (0.1695) | $ (0.3644) | $ (0.2677) |
| Net realized and unrealized gain (loss) | $ (8.8783) | $ 56.7051 | $ (15.7534) | $ 59.4698 |
| Change in net asset value from operations | $ (9.0675) | $ 56.5356 | $ (16.1178) | $ 59.2021 |
| Net asset value, ending balance | $ 73.6642 | $ 110.5972 | $ 73.6642 | $ 110.5972 |
| Market value per share, beginning balance | $ 84.24 | $ 55.02 | $ 90.19 | $ 50.07 |
| Market value per share, ending balance | $ 72.05 | $ 101.27 | $ 72.05 | $ 101.27 |
| Total Return, at net asset value | (11.00%) | 104.60% | (18.00%) | 115.20% |
| Total Return, at market value | (14.50%) | 84.10% | (20.10%) | 102.30% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.90%) | (0.90%) | (0.89%) | (0.88%) |
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ProShares Short Euro [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 35.5105 | $ 38.6319 | $ 35.5867 | $ 37.6285 |
| Net investment income (loss) | $ (0.0817) | $ (0.0857) | $ (0.1618) | $ (0.1698) |
| Net realized and unrealized gain (loss) | $ 0.1843 | $ (0.6198) | $ 0.1882 | $ 0.4677 |
| Change in net asset value from operations | $ 0.1026 | $ (0.7055) | $ 0.0264 | $ 0.2979 |
| Net asset value, ending balance | $ 35.6131 | $ 37.9264 | $ 35.6131 | $ 37.9264 |
| Market value per share, beginning balance | $ 35.58 | $ 38.65 | $ 35.66 | $ 37.64 |
| Market value per share, ending balance | $ 35.66 | $ 38.01 | $ 35.66 | $ 38.01 |
| Total Return, at net asset value | 0.30% | (1.80%) | 0.10% | 0.80% |
| Total Return, at market value | 0.20% | (1.70%) | 0.00% | 1.00% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.97%) | (0.96%) | (0.96%) | (0.96%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.92%) | (0.91%) | (0.91%) | (0.91%) |
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ProShares UltraShort Yen [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 67.6164 | $ 59.0103 | $ 70.8640 | $ 50.7577 |
| Net investment income (loss) | $ (0.1463) | $ (0.1447) | $ (0.2923) | $ (0.2699) |
| Net realized and unrealized gain (loss) | $ (2.5778) | $ 5.2415 | $ (5.6794) | $ 13.6193 |
| Change in net asset value from operations | $ (2.7241) | $ 5.0968 | $ (5.9717) | $ 13.3494 |
| Net asset value, ending balance | $ 64.8923 | $ 64.1071 | $ 64.8923 | $ 64.1071 |
| Market value per share, beginning balance | $ 67.62 | $ 59.00 | $ 70.91 | $ 50.77 |
| Market value per share, ending balance | $ 64.89 | $ 64.08 | $ 64.89 | $ 64.08 |
| Total Return, at net asset value | (4.00%) | 8.60% | (8.40%) | 26.30% |
| Total Return, at market value | (4.00%) | 8.60% | (8.50%) | 26.20% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.89%) | (0.90%) | (0.88%) | (0.89%) |
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ProShares Ultra Bloomberg Commodity [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 22.1066 | $ 23.6100 | $ 19.4317 | $ 24.3875 |
| Net investment income (loss) | $ (0.0507) | $ (0.0479) | $ (0.0971) | $ (0.1017) |
| Net realized and unrealized gain (loss) | $ (0.0269) | $ (4.3018) | $ 2.6944 | $ (5.0255) |
| Change in net asset value from operations | $ (0.0776) | $ (4.3497) | $ 2.5973 | $ (5.1272) |
| Net asset value, ending balance | $ 22.0290 | $ 19.2603 | $ 22.0290 | $ 19.2603 |
| Market value per share, beginning balance | $ 21.51 | $ 23.92 | $ 19.13 | $ 23.93 |
| Market value per share, ending balance | $ 22.02 | $ 18.96 | $ 22.02 | $ 18.96 |
| Total Return, at net asset value | (0.40%) | (18.40%) | 13.40% | (21.00%) |
| Total Return, at market value | 2.40% | (20.70%) | 15.10% | (20.80%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.90%) | (0.89%) | (0.91%) | (0.89%) |
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ProShares Ultra Bloomberg Crude Oil [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 34.6261 | $ 31.6693 | $ 32.0899 | $ 29.3941 |
| Net investment income (loss) | $ (0.0846) | $ (0.0674) | $ (0.1524) | $ (0.1348) |
| Net realized and unrealized gain (loss) | $ 4.6490 | $ (1.4405) | $ 7.2530 | $ 0.9021 |
| Change in net asset value from operations | $ 4.5644 | $ (1.5079) | $ 7.1006 | $ 0.7673 |
| Net asset value, ending balance | $ 39.1905 | $ 30.1614 | $ 39.1905 | $ 30.1614 |
| Market value per share, beginning balance | $ 34.56 | $ 31.56 | $ 32.22 | $ 29.32 |
| Market value per share, ending balance | $ 39.19 | $ 30.11 | $ 39.19 | $ 30.11 |
| Total Return, at net asset value | 13.20% | (4.80%) | 22.10% | 2.60% |
| Total Return, at market value | 13.40% | (4.60%) | 21.60% | 2.70% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.98%) | (0.98%) | (0.98%) | (0.97%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.93%) | (0.94%) | (0.92%) | (0.91%) |
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ProShares Ultra Bloomberg Natural Gas [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 45.1373 | $ 50.2520 | $ 38.8383 | $ 39.0490 |
| Net investment income (loss) | $ (0.1336) | $ (0.1359) | $ (0.2458) | $ (0.2278) |
| Net realized and unrealized gain (loss) | $ 0.0314 | $ (14.0947) | $ 6.4426 | $ (2.7998) |
| Change in net asset value from operations | $ (0.1022) | $ (14.2306) | $ 6.1968 | $ (3.0276) |
| Net asset value, ending balance | $ 45.0351 | $ 36.0214 | $ 45.0351 | $ 36.0214 |
| Market value per share, beginning balance | $ 45.32 | $ 49.95 | $ 39.28 | $ 39.24 |
| Market value per share, ending balance | $ 45.02 | $ 36.26 | $ 45.02 | $ 36.26 |
| Total Return, at net asset value | (0.20%) | (28.30%) | 16.00% | (7.80%) |
| Total Return, at market value | (0.70%) | (27.40%) | 14.60% | (7.60%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (1.15%) | (1.19%) | (1.12%) | (1.15%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (1.11%) | (1.14%) | (1.07%) | (1.09%) |
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ProShares Ultra Gold [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 47.0239 | $ 77.1858 | $ 41.2553 | $ 83.7634 |
| Net investment income (loss) | $ (0.1043) | $ (0.1322) | $ (0.2104) | $ (0.3089) |
| Net realized and unrealized gain (loss) | $ 1.4581 | $ (35.3778) | $ 7.3328 | $ (41.7787) |
| Change in net asset value from operations | $ 1.3538 | $ (35.5100) | $ 7.1224 | $ (42.0876) |
| Net asset value, ending balance | $ 48.3777 | $ 41.6758 | $ 48.3777 | $ 41.6758 |
| Market value per share, beginning balance | $ 46.34 | $ 77.01 | $ 41.26 | $ 85.34 |
| Market value per share, ending balance | $ 49.41 | $ 44.63 | $ 49.41 | $ 44.63 |
| Total Return, at net asset value | 2.90% | (46.00%) | 17.30% | (50.20%) |
| Total Return, at market value | 6.60% | (42.00%) | 19.80% | (47.70%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.90%) | (0.87%) | (0.90%) | (0.88%) |
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ProShares Ultra Silver [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 65.2313 | $ 153.9142 | $ 63.3305 | $ 171.8906 |
| Net investment income (loss) | $ (0.1410) | $ (0.2137) | $ (0.2944) | $ (0.5601) |
| Net realized and unrealized gain (loss) | $ 5.0140 | $ (90.7274) | $ 7.0682 | $ (108.3574) |
| Change in net asset value from operations | $ 4.8730 | $ (90.9411) | $ 6.7738 | $ (108.9175) |
| Net asset value, ending balance | $ 70.1043 | $ 62.9731 | $ 70.1043 | $ 62.9731 |
| Market value per share, beginning balance | $ 64.12 | $ 151.00 | $ 63.04 | $ 176.40 |
| Market value per share, ending balance | $ 71.76 | $ 68.00 | $ 71.76 | $ 68.00 |
| Total Return, at net asset value | 7.50% | (59.10%) | 10.70% | (63.40%) |
| Total Return, at market value | 11.90% | (55.00%) | 13.80% | (61.50%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.91%) | (0.88%) | (0.90%) | (0.87%) |
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ProShares Ultra Australian Dollar [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 34.4436 | $ 42.1480 | $ 31.6801 | $ 41.4986 |
| Net investment income (loss) | $ (0.0814) | $ (0.0909) | $ (0.1547) | $ (0.1859) |
| Net realized and unrealized gain (loss) | $ 1.5579 | $ (9.2248) | $ 4.3947 | $ (8.4804) |
| Change in net asset value from operations | $ 1.4765 | $ (9.3157) | $ 4.2400 | $ (8.6663) |
| Net asset value, ending balance | $ 35.9201 | $ 32.8323 | $ 35.9201 | $ 32.8323 |
| Market value per share, beginning balance | $ 34.46 | $ 42.55 | $ 31.61 | $ 41.45 |
| Market value per share, ending balance | $ 35.65 | $ 33.96 | $ 35.65 | $ 33.96 |
| Total Return, at net asset value | 4.30% | (22.10%) | 13.40% | (20.90%) |
| Total Return, at market value | 3.50% | (20.20%) | 12.80% | (18.10%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.99%) | (0.99%) | (1.00%) | (0.99%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.93%) | (0.95%) | (0.93%) | (0.94%) |
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ProShares Ultra Euro [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 26.0292 | $ 22.8637 | $ 26.0346 | $ 24.3499 |
| Net investment income (loss) | $ (0.0578) | $ (0.0533) | $ (0.1144) | $ (0.1070) |
| Net realized and unrealized gain (loss) | $ (0.3060) | $ 0.6640 | $ (0.2548) | $ (0.7685) |
| Change in net asset value from operations | $ (0.3638) | $ 0.6107 | $ (0.3692) | $ (0.8755) |
| Net asset value, ending balance | $ 25.6654 | $ 23.4744 | $ 25.6654 | $ 23.4744 |
| Market value per share, beginning balance | $ 25.98 | $ 22.92 | $ 25.98 | $ 24.32 |
| Market value per share, ending balance | $ 25.80 | $ 23.25 | $ 25.80 | $ 23.25 |
| Total Return, at net asset value | (1.40%) | 2.70% | (1.40%) | (3.60%) |
| Total Return, at market value | (0.70%) | 1.40% | (0.70%) | (4.40%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.90%) | (0.90%) | (0.89%) | (0.90%) |
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ProShares Ultra Yen [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 19.3058 | $ 23.7738 | $ 18.6318 | $ 28.1840 |
| Net investment income (loss) | $ (0.0438) | $ (0.0482) | $ (0.0866) | $ (0.1026) |
| Net realized and unrealized gain (loss) | $ 0.7057 | $ (2.5057) | $ 1.4225 | $ (6.8615) |
| Change in net asset value from operations | $ 0.6619 | $ (2.5539) | $ 1.3359 | $ (6.9641) |
| Net asset value, ending balance | $ 19.9677 | $ 21.2199 | $ 19.9677 | $ 21.2199 |
| Market value per share, beginning balance | $ 19.29 | $ 23.69 | $ 18.61 | $ 28.28 |
| Market value per share, ending balance | $ 20.07 | $ 21.10 | $ 20.07 | $ 21.10 |
| Total Return, at net asset value | 3.40% | (10.70%) | 7.20% | (24.70%) |
| Total Return, at market value | 4.00% | (10.90%) | 7.80% | (25.40%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.89%) | (0.90%) | (0.89%) | (0.89%) |
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ProShares VIX Short-Term Futures ETF [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 28.2007 | $ 54.1233 | $ 28.5387 | $ 83.9374 |
| Net investment income (loss) | $ (0.0488) | $ (0.1069) | $ (0.1078) | $ (0.2241) |
| Net realized and unrealized gain (loss) | $ (9.1435) | $ 1.9255 | $ (9.4225) | $ (27.7714) |
| Change in net asset value from operations | $ (9.1923) | $ 1.8186 | $ (9.5303) | $ (27.9955) |
| Net asset value, ending balance | $ 19.0084 | $ 55.9419 | $ 19.0084 | $ 55.9419 |
| Market value per share, beginning balance | $ 28.10 | $ 54.50 | $ 28.53 | $ 85.05 |
| Market value per share, ending balance | $ 19.03 | $ 55.91 | $ 19.03 | $ 55.91 |
| Total Return, at net asset value | (32.60%) | 3.40% | (33.40%) | (33.40%) |
| Total Return, at market value | (32.30%) | 2.60% | (33.30%) | (34.30%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.85%) | (0.85%) | (0.85%) | (0.85%) |
| Expense ratio, excluding brokerage commissions | (0.85%) | (0.85%) | (0.85%) | (0.85%) |
| Net investment income (loss) | (0.81%) | (0.81%) | (0.80%) | (0.80%) |
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ProShares VIX Mid-Term Futures ETF [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 18.4937 | $ 26.4359 | $ 19.2959 | $ 34.7003 |
| Net investment income (loss) | $ (0.0350) | $ (0.0525) | $ (0.0733) | $ (0.1061) |
| Net realized and unrealized gain (loss) | $ (3.0164) | $ 1.9041 | $ (3.7803) | $ (6.3067) |
| Change in net asset value from operations | $ (3.0514) | $ 1.8516 | $ (3.8536) | $ (6.4128) |
| Net asset value, ending balance | $ 15.4423 | $ 28.2875 | $ 15.4423 | $ 28.2875 |
| Market value per share, beginning balance | $ 18.50 | $ 26.43 | $ 19.29 | $ 34.22 |
| Market value per share, ending balance | $ 15.47 | $ 28.25 | $ 15.47 | $ 28.25 |
| Total Return, at net asset value | (16.50%) | 7.00% | (20.00%) | (18.50%) |
| Total Return, at market value | (16.40%) | 6.90% | (19.80%) | (17.40%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.85%) | (0.85%) | (0.85%) | (0.85%) |
| Expense ratio, excluding brokerage commissions | (0.85%) | (0.85%) | (0.85%) | (0.85%) |
| Net investment income (loss) | (0.81%) | (0.81%) | (0.81%) | (0.80%) |
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ProShares Ultra VIX Short-Term Futures ETF [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 60.2965 | $ 303.0453 | $ 67.0841 | $ 805.2711 |
| Net investment income (loss) | $ (0.1784) | $ (1.1661) | $ (0.4282) | $ (2.7768) |
| Net realized and unrealized gain (loss) | $ (33.5661) | $ (13.8954) | $ (40.1039) | $ (514.5105) |
| Change in net asset value from operations | $ (33.7445) | $ (15.0615) | $ (40.5321) | $ (517.2873) |
| Net asset value, ending balance | $ 26.5520 | $ 287.9838 | $ 26.5520 | $ 287.9838 |
| Market value per share, beginning balance | $ 59.91 | $ 307.60 | $ 67.12 | $ 836.00 |
| Market value per share, ending balance | $ 26.62 | $ 286.76 | $ 26.62 | $ 286.76 |
| Total Return, at net asset value | (56.00%) | (5.00%) | (60.40%) | (64.20%) |
| Total Return, at market value | (55.60%) | (6.80%) | (60.30%) | (65.70%) |
| Ratios to Average Net Assets | ||||
| Expense ratio | (1.73%) | (1.80%) | (1.76%) | (1.86%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (1.71%) | (1.77%) | (1.73%) | (1.83%) |
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ProShares Short VIX Short-Term Futures ETF [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 61.8592 | $ 46.0986 | $ 67.4993 | $ 33.0649 |
| Net investment income (loss) | $ (0.2536) | $ (0.1633) | $ (0.4717) | $ (0.3152) |
| Net realized and unrealized gain (loss) | $ 26.8007 | $ (6.8039) | $ 21.3787 | $ 6.3817 |
| Change in net asset value from operations | $ 26.5471 | $ (6.9672) | $ 20.9070 | $ 6.0665 |
| Net asset value, ending balance | $ 88.4063 | $ 39.1314 | $ 88.4063 | $ 39.1314 |
| Market value per share, beginning balance | $ 61.97 | $ 45.54 | $ 67.47 | $ 32.73 |
| Market value per share, ending balance | $ 88.27 | $ 39.23 | $ 88.27 | $ 39.23 |
| Total Return, at net asset value | 42.90% | (15.10%) | 31.00% | 18.30% |
| Total Return, at market value | 42.40% | (13.90%) | 30.80% | 19.90% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (1.48%) | (1.56%) | (1.49%) | (1.55%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (1.44%) | (1.52%) | (1.45%) | (1.50%) |
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ProShares UltraShort Euro [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 16.9264 | $ 20.0135 | $ 17.0613 | $ 19.0172 |
| Net investment income (loss) | $ (0.0380) | $ (0.0435) | $ (0.0753) | $ (0.0846) |
| Net realized and unrealized gain (loss) | $ 0.1719 | $ (0.6810) | $ 0.0743 | $ 0.3564 |
| Change in net asset value from operations | $ 0.1339 | $ (0.7245) | $ (0.0010) | $ 0.2718 |
| Net asset value, ending balance | $ 17.0603 | $ 19.2890 | $ 17.0603 | $ 19.2890 |
| Market value per share, beginning balance | $ 16.93 | $ 20.00 | $ 17.06 | $ 19.01 |
| Market value per share, ending balance | $ 17.05 | $ 19.29 | $ 17.05 | $ 19.29 |
| Total Return, at net asset value | 0.80% | (3.60%) | 0.00% | 1.40% |
| Total Return, at market value | 0.70% | (3.60%) | (0.10%) | 1.50% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.89%) | (0.91%) | (0.89%) | (0.89%) |
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ProShares UltraShort Australian Dollar [Member]
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| Financial Highlights [Line Items] | ||||
| Net asset value, beginning balance | $ 42.3310 | $ 36.8899 | $ 46.6384 | $ 37.8081 |
| Net investment income (loss) | $ (0.0991) | $ (0.1080) | $ (0.2068) | $ (0.2042) |
| Net realized and unrealized gain (loss) | $ (1.9777) | $ 9.6293 | $ (6.1774) | $ 8.8073 |
| Change in net asset value from operations | $ (2.0768) | $ 9.5213 | $ (6.3842) | $ 8.6031 |
| Net asset value, ending balance | $ 40.2542 | $ 46.4112 | $ 40.2542 | $ 46.4112 |
| Market value per share, beginning balance | $ 42.27 | $ 36.41 | $ 46.66 | $ 37.74 |
| Market value per share, ending balance | $ 40.29 | $ 46.54 | $ 40.29 | $ 46.54 |
| Total Return, at net asset value | (4.90%) | 25.80% | (13.70%) | 22.80% |
| Total Return, at market value | (4.70%) | 27.80% | (13.70%) | 23.30% |
| Ratios to Average Net Assets | ||||
| Expense ratio | (1.00%) | (1.06%) | (1.01%) | (1.05%) |
| Expense ratio, excluding brokerage commissions | (0.95%) | (0.95%) | (0.95%) | (0.95%) |
| Net investment income (loss) | (0.96%) | (1.03%) | (0.95%) | (1.01%) |