|
Financial Highlights - Per Share Operating Performance (Detail) (USD $)
|
3 Months Ended |
|
Mar. 31, 2014
|
Mar. 31, 2013
|
|
ProShares UltraShort DJ-UBS Commodity [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 63.2936 |
$ 54.1021 |
| Net investment income (loss) |
$ (0.1332) |
$ (0.1143) |
| Net realized and unrealized gain (loss) |
$ (8.4288) |
$ 1.1149 |
| Change in net asset value from operations |
$ (8.5620) |
$ 1.0006 |
| Net asset value, ending balance |
$ 54.7316 |
$ 55.1027 |
| Market value per share, beginning balance |
$ 58.41 |
$ 51.64 |
| Market value per share, ending balance |
$ 55.25 |
$ 51.14 |
| Total Return, at net asset value |
(13.50%) |
1.80% |
| Total Return, at market value |
(5.40%) |
(1.00%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.91%) |
(0.86%) |
|
ProShares UltraShort DJ-UBS Crude Oil [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 31.7301 |
$ 40.3079 |
| Net investment income (loss) |
$ (0.0690) |
$ (0.0850) |
| Net realized and unrealized gain (loss) |
$ (3.1766) |
$ (3.7437) |
| Change in net asset value from operations |
$ (3.2456) |
$ (3.8287) |
| Net asset value, ending balance |
$ 28.4845 |
$ 36.4792 |
| Market value per share, beginning balance |
$ 31.58 |
$ 40.44 |
| Market value per share, ending balance |
$ 28.54 |
$ 36.62 |
| Total Return, at net asset value |
(10.20%) |
(9.50%) |
| Total Return, at market value |
(9.60%) |
(9.40%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.97%) |
(0.97%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.91%) |
(0.90%) |
|
ProShares UltraShort DJ-UBS Natural Gas [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 69.9635 |
$ 102.1402 |
| Net investment income (loss) |
$ (0.1225) |
$ (0.2565) |
| Net realized and unrealized gain (loss) |
$ (25.9326) |
$ (30.0196) |
| Change in net asset value from operations |
$ (26.0551) |
$ (30.2761) |
| Net asset value, ending balance |
$ 43.9084 |
$ 71.8641 |
| Market value per share, beginning balance |
$ 69.36 |
$ 101.64 |
| Market value per share, ending balance |
$ 43.71 |
$ 72.24 |
| Total Return, at net asset value |
(37.20%) |
(29.60%) |
| Total Return, at market value |
(37.00%) |
(28.90%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(1.17%) |
(1.21%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(1.12%) |
(1.15%) |
|
ProShares UltraShort Gold [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 103.5180 |
$ 63.8688 |
| Net investment income (loss) |
$ (0.1979) |
$ (0.1428) |
| Net realized and unrealized gain (loss) |
$ (15.0246) |
$ 4.1421 |
| Change in net asset value from operations |
$ (15.2225) |
$ 3.9993 |
| Net asset value, ending balance |
$ 88.2955 |
$ 67.8681 |
| Market value per share, beginning balance |
$ 103.53 |
$ 62.60 |
| Market value per share, ending balance |
$ 89.45 |
$ 68.01 |
| Total Return, at net asset value |
(14.70%) |
6.30% |
| Total Return, at market value |
(13.60%) |
8.60% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.89%) |
(0.88%) |
|
ProShares UltraShort Silver [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 89.7820 |
$ 51.3951 |
| Net investment income (loss) |
$ (0.1773) |
$ (0.1068) |
| Net realized and unrealized gain (loss) |
$ (6.8730) |
$ 2.7733 |
| Change in net asset value from operations |
$ (7.0503) |
$ 2.6665 |
| Net asset value, ending balance |
$ 82.7317 |
$ 54.0616 |
| Market value per share, beginning balance |
$ 90.19 |
$ 50.07 |
| Market value per share, ending balance |
$ 84.24 |
$ 55.02 |
| Total Return, at net asset value |
(7.90%) |
5.20% |
| Total Return, at market value |
(6.60%) |
9.90% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.89%) |
(0.87%) |
|
ProShares Short Euro [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 35.5867 |
$ 37.6285 |
| Net investment income (loss) |
$ (0.0799) |
$ (0.0840) |
| Net realized and unrealized gain (loss) |
$ 0.0037 |
$ 1.0874 |
| Change in net asset value from operations |
$ (0.0762) |
$ 1.0034 |
| Net asset value, ending balance |
$ 35.5105 |
$ 38.6319 |
| Market value per share, beginning balance |
$ 35.66 |
$ 37.64 |
| Market value per share, ending balance |
$ 35.58 |
$ 38.65 |
| Total Return, at net asset value |
(0.20%) |
2.70% |
| Total Return, at market value |
(0.20%) |
2.70% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.96%) |
(0.96%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.91%) |
(0.91%) |
|
ProShares UltraShort Australian Dollar [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 46.6384 |
$ 37.8081 |
| Net investment income (loss) |
$ (0.1073) |
$ (0.0867) |
| Net realized and unrealized gain (loss) |
$ (4.2001) |
$ (0.8315) |
| Change in net asset value from operations |
$ (4.3074) |
$ (0.9182) |
| Net asset value, ending balance |
$ 42.3310 |
$ 36.8899 |
| Market value per share, beginning balance |
$ 46.66 |
$ 37.74 |
| Market value per share, ending balance |
$ 42.27 |
$ 36.41 |
| Total Return, at net asset value |
(9.20%) |
(2.40%) |
| Total Return, at market value |
(9.40%) |
(3.50%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(1.01%) |
(0.99%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.95%) |
(0.94%) |
|
ProShares UltraShort Euro [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 17.0613 |
$ 19.0172 |
| Net investment income (loss) |
$ (0.0373) |
$ (0.0411) |
| Net realized and unrealized gain (loss) |
$ (0.0976) |
$ 1.0374 |
| Change in net asset value from operations |
$ (0.1349) |
$ 0.9963 |
| Net asset value, ending balance |
$ 16.9264 |
$ 20.0135 |
| Market value per share, beginning balance |
$ 17.06 |
$ 19.01 |
| Market value per share, ending balance |
$ 16.93 |
$ 20.00 |
| Total Return, at net asset value |
(0.80%) |
5.20% |
| Total Return, at market value |
(0.80%) |
5.20% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.88%) |
(0.88%) |
|
ProShares UltraShort Yen [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 70.8640 |
$ 50.7577 |
| Net investment income (loss) |
$ (0.1459) |
$ (0.1244) |
| Net realized and unrealized gain (loss) |
$ (3.1017) |
$ 8.3770 |
| Change in net asset value from operations |
$ (3.2476) |
$ 8.2526 |
| Net asset value, ending balance |
$ 67.6164 |
$ 59.0103 |
| Market value per share, beginning balance |
$ 70.91 |
$ 50.77 |
| Market value per share, ending balance |
$ 67.62 |
$ 59.00 |
| Total Return, at net asset value |
(4.60%) |
16.30% |
| Total Return, at market value |
(4.60%) |
16.20% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.88%) |
(0.88%) |
|
ProShares Ultra DJ-UBS Commodity [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 19.4317 |
$ 24.3875 |
| Net investment income (loss) |
$ (0.0464) |
$ (0.0535) |
| Net realized and unrealized gain (loss) |
$ 2.7213 |
$ (0.7240) |
| Change in net asset value from operations |
$ 2.6749 |
$ (0.7775) |
| Net asset value, ending balance |
$ 22.1066 |
$ 23.6100 |
| Market value per share, beginning balance |
$ 19.13 |
$ 23.93 |
| Market value per share, ending balance |
$ 21.51 |
$ 23.92 |
| Total Return, at net asset value |
13.80% |
(3.20%) |
| Total Return, at market value |
12.40% |
0.00% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.91%) |
(0.89%) |
|
ProShares Ultra DJ-UBS Crude Oil [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 32.0899 |
$ 29.3941 |
| Net investment income (loss) |
$ (0.0712) |
$ (0.0674) |
| Net realized and unrealized gain (loss) |
$ 2.6074 |
$ 2.3426 |
| Change in net asset value from operations |
$ 2.5362 |
$ 2.2752 |
| Net asset value, ending balance |
$ 34.6261 |
$ 31.6693 |
| Market value per share, beginning balance |
$ 32.22 |
$ 29.32 |
| Market value per share, ending balance |
$ 34.56 |
$ 31.56 |
| Total Return, at net asset value |
7.90% |
7.70% |
| Total Return, at market value |
7.30% |
7.60% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.98%) |
(0.97%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.92%) |
(0.90%) |
|
ProShares Ultra DJ-UBS Natural Gas [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 38.8383 |
$ 39.0490 |
| Net investment income (loss) |
$ (0.1183) |
$ (0.1040) |
| Net realized and unrealized gain (loss) |
$ 6.4173 |
$ 11.3070 |
| Change in net asset value from operations |
$ 6.2990 |
$ 11.2030 |
| Net asset value, ending balance |
$ 45.1373 |
$ 50.2520 |
| Market value per share, beginning balance |
$ 39.28 |
$ 39.24 |
| Market value per share, ending balance |
$ 45.32 |
$ 49.95 |
| Total Return, at net asset value |
16.20% |
28.70% |
| Total Return, at market value |
15.40% |
27.30% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(1.11%) |
(1.13%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(1.06%) |
(1.06%) |
|
ProShares Ultra Gold [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 41.2553 |
$ 83.7634 |
| Net investment income (loss) |
$ (0.1060) |
$ (0.1744) |
| Net realized and unrealized gain (loss) |
$ 5.8746 |
$ (6.4032) |
| Change in net asset value from operations |
$ 5.7686 |
$ (6.5776) |
| Net asset value, ending balance |
$ 47.0239 |
$ 77.1858 |
| Market value per share, beginning balance |
$ 41.26 |
$ 85.34 |
| Market value per share, ending balance |
$ 46.34 |
$ 77.01 |
| Total Return, at net asset value |
14.00% |
(7.90%) |
| Total Return, at market value |
12.30% |
(9.80%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.91%) |
(0.88%) |
|
ProShares Ultra Silver [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 63.3305 |
$ 171.8906 |
| Net investment income (loss) |
$ (0.1535) |
$ (0.3644) |
| Net realized and unrealized gain (loss) |
$ 2.0543 |
$ (17.6120) |
| Change in net asset value from operations |
$ 1.9008 |
$ (17.9764) |
| Net asset value, ending balance |
$ 65.2313 |
$ 153.9142 |
| Market value per share, beginning balance |
$ 63.04 |
$ 176.40 |
| Market value per share, ending balance |
$ 64.12 |
$ 151.00 |
| Total Return, at net asset value |
3.00% |
(10.50%) |
| Total Return, at market value |
1.70% |
(14.40%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.90%) |
(0.87%) |
|
ProShares Ultra Australian Dollar [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 31.6801 |
$ 41.4986 |
| Net investment income (loss) |
$ (0.0733) |
$ (0.0949) |
| Net realized and unrealized gain (loss) |
$ 2.8368 |
$ 0.7443 |
| Change in net asset value from operations |
$ 2.7635 |
$ 0.6494 |
| Net asset value, ending balance |
$ 34.4436 |
$ 42.1480 |
| Market value per share, beginning balance |
$ 31.61 |
$ 41.45 |
| Market value per share, ending balance |
$ 34.46 |
$ 42.55 |
| Total Return, at net asset value |
8.70% |
1.60% |
| Total Return, at market value |
9.00% |
2.70% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(1.00%) |
(0.99%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.93%) |
(0.92%) |
|
ProShares Ultra Euro [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 26.0346 |
$ 24.3499 |
| Net investment income (loss) |
$ (0.0566) |
$ (0.0536) |
| Net realized and unrealized gain (loss) |
$ 0.0512 |
$ (1.4326) |
| Change in net asset value from operations |
$ (0.0054) |
$ (1.4862) |
| Net asset value, ending balance |
$ 26.0292 |
$ 22.8637 |
| Market value per share, beginning balance |
$ 25.98 |
$ 24.32 |
| Market value per share, ending balance |
$ 25.98 |
$ 22.92 |
| Total Return, at net asset value |
0.00% |
(6.10%) |
| Total Return, at market value |
0.00% |
(5.80%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.89%) |
(0.89%) |
|
ProShares Ultra Yen [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 18.6318 |
$ 28.1840 |
| Net investment income (loss) |
$ (0.0428) |
$ (0.0537) |
| Net realized and unrealized gain (loss) |
$ 0.7168 |
$ (4.3565) |
| Change in net asset value from operations |
$ 0.6740 |
$ (4.4102) |
| Net asset value, ending balance |
$ 19.3058 |
$ 23.7738 |
| Market value per share, beginning balance |
$ 18.61 |
$ 28.28 |
| Market value per share, ending balance |
$ 19.29 |
$ 23.69 |
| Total Return, at net asset value |
3.60% |
(15.60%) |
| Total Return, at market value |
3.70% |
(16.20%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.95%) |
(0.95%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(0.89%) |
(0.88%) |
|
ProShares VIX Short-Term Futures ETF [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 28.5387 |
$ 83.9374 |
| Net investment income (loss) |
$ (0.0577) |
$ (0.1201) |
| Net realized and unrealized gain (loss) |
$ (0.2803) |
$ (29.6940) |
| Change in net asset value from operations |
$ (0.3380) |
$ (29.8141) |
| Net asset value, ending balance |
$ 28.2007 |
$ 54.1233 |
| Market value per share, beginning balance |
$ 28.53 |
$ 85.05 |
| Market value per share, ending balance |
$ 28.10 |
$ 54.50 |
| Total Return, at net asset value |
(1.20%) |
(35.50%) |
| Total Return, at market value |
(1.50%) |
(35.90%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.85%) |
(0.85%) |
| Expense ratio, excluding brokerage commissions |
(0.85%) |
(0.85%) |
| Net investment income (loss) |
(0.80%) |
(0.79%) |
|
ProShares VIX Mid-Term Futures ETF [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 19.2959 |
$ 34.7003 |
| Net investment income (loss) |
$ (0.0383) |
$ (0.0539) |
| Net realized and unrealized gain (loss) |
$ (0.7639) |
$ (8.2105) |
| Change in net asset value from operations |
$ (0.8022) |
$ (8.2644) |
| Net asset value, ending balance |
$ 18.4937 |
$ 26.4359 |
| Market value per share, beginning balance |
$ 19.29 |
$ 34.22 |
| Market value per share, ending balance |
$ 18.50 |
$ 26.43 |
| Total Return, at net asset value |
(4.20%) |
(23.80%) |
| Total Return, at market value |
(4.10%) |
(22.80%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(0.85%) |
(0.85%) |
| Expense ratio, excluding brokerage commissions |
(0.85%) |
(0.85%) |
| Net investment income (loss) |
(0.81%) |
(0.79%) |
|
ProShares Ultra VIX Short-Term Futures ETF [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 67.0841 |
$ 805.2711 |
| Net investment income (loss) |
$ (0.2919) |
$ (1.8551) |
| Net realized and unrealized gain (loss) |
$ (6.4957) |
$ (500.3708) |
| Change in net asset value from operations |
$ (6.7876) |
$ (502.2259) |
| Net asset value, ending balance |
$ 60.2965 |
$ 303.0453 |
| Market value per share, beginning balance |
$ 67.12 |
$ 836.00 |
| Market value per share, ending balance |
$ 59.91 |
$ 307.60 |
| Total Return, at net asset value |
(10.10%) |
(62.40%) |
| Total Return, at market value |
(10.70%) |
(63.20%) |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(1.79%) |
(1.94%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(1.76%) |
(1.91%) |
|
ProShares Short VIX Short-Term Futures ETF [Member]
|
|
|
| Financial Highlights [Line Items] |
|
|
| Net asset value, beginning balance |
$ 67.4993 |
$ 33.0649 |
| Net investment income (loss) |
$ (0.2209) |
$ (0.1506) |
| Net realized and unrealized gain (loss) |
$ (5.4192) |
$ 13.1843 |
| Change in net asset value from operations |
$ (5.6401) |
$ 13.0337 |
| Net asset value, ending balance |
$ 61.8592 |
$ 46.0986 |
| Market value per share, beginning balance |
$ 67.47 |
$ 32.73 |
| Market value per share, ending balance |
$ 61.97 |
$ 45.54 |
| Total Return, at net asset value |
(8.40%) |
39.40% |
| Total Return, at market value |
(8.20%) |
39.20% |
| Ratios to Average Net Assets |
|
|
| Expense ratio |
(1.50%) |
(1.54%) |
| Expense ratio, excluding brokerage commissions |
(0.95%) |
(0.95%) |
| Net investment income (loss) |
(1.45%) |
(1.47%) |