Financial Highlights - Per Share Operating Performance (Detail) - $ / shares
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3 Months Ended |
9 Months Ended |
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
| ProShares VIX Short-Term Futures ETF [Member] |
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| Investment Company, Financial Highlights [Line Items] |
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| Net asset value, beginning balance |
[1] |
$ 42.69
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$ 180.57
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$ 84.86
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$ 264.84
|
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| Net investment income (loss) |
[1] |
(0.01)
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|
(0.24)
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|
(0.11)
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|
(1.03)
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| Net realized and unrealized gain (loss) |
[1],[2] |
(10.11)
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|
(66.20)
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(52.18)
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(149.68)
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| Change in net asset value from operations |
[1] |
(10.12)
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(66.44)
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(52.29)
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(150.71)
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| Net asset value, ending balance |
[1] |
32.57
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|
114.13
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32.57
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|
114.13
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| Market value per share, beginning balance |
[1],[3] |
42.52
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|
183.20
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|
85.04
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|
266.60
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| Market value per share, ending balance |
[1],[3] |
$ 32.53
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$ 113.32
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$ 32.53
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$ 113.32
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| Total Return, at net asset value |
[1] |
(23.70%)
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[4] |
(36.80%)
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[5] |
(61.60%)
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[4] |
(56.90%)
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[5] |
| Total Return, at market value |
[1] |
(23.50%)
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[4] |
(38.10%)
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[5] |
(61.70%)
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[4] |
(57.50%)
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[5] |
| Ratios to Average Net Assets |
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| Expense ratio |
[1],[6] |
0.98%
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|
0.99%
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|
0.97%
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|
1.01%
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| Expense ratio, excluding brokerage commissions |
[1],[6] |
0.85%
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|
0.85%
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0.85%
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|
0.85%
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| Net investment income (loss) |
[1],[6] |
(0.14%)
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(0.73%)
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(0.30%)
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(0.78%)
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| ProShares VIX Mid-Term Futures ETF [Member] |
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| Investment Company, Financial Highlights [Line Items] |
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| Net asset value, beginning balance |
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$ 27.46
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$ 51.98
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$ 42.14
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$ 53.96
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| Net investment income (loss) |
|
(0.01)
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(0.09)
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(0.07)
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|
(0.28)
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| Net realized and unrealized gain (loss) |
[2] |
(2.25)
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(6.14)
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(16.87)
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(7.93)
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| Change in net asset value from operations |
|
(2.26)
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(6.23)
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(16.94)
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(8.21)
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| Net asset value, ending balance |
|
25.20
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|
45.75
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|
25.20
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|
45.75
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| Market value per share, beginning balance |
[3] |
27.43
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52.53
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|
42.34
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|
53.99
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| Market value per share, ending balance |
[3] |
$ 25.17
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$ 45.69
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$ 25.17
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$ 45.69
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| Total Return, at net asset value |
|
(8.20%)
|
[4] |
(12.00%)
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[5] |
(40.20%)
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[4] |
(15.20%)
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[5] |
| Total Return, at market value |
|
(8.20%)
|
[4] |
(13.00%)
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[5] |
(40.60%)
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[4] |
(15.40%)
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[5] |
| Ratios to Average Net Assets |
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| Expense ratio |
[6] |
0.92%
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|
0.94%
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|
0.89%
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|
0.93%
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| Expense ratio, excluding brokerage commissions |
[6] |
0.85%
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0.85%
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|
0.85%
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|
0.85%
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| Net investment income (loss) |
[6] |
(0.17%)
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(0.70%)
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(0.30%)
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(0.71%)
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| ProShares Short VIX Short-Term Futures ETF [Member] |
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| Investment Company, Financial Highlights [Line Items] |
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| Net asset value, beginning balance |
[1] |
$ 80.11
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$ 24.92
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$ 45.62
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$ 25.41
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| Net investment income (loss) |
[1] |
(0.13)
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(0.09)
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(0.45)
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|
(0.21)
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| Net realized and unrealized gain (loss) |
[1],[2] |
13.70
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|
11.49
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48.51
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11.12
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| Change in net asset value from operations |
[1] |
13.57
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|
11.40
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|
48.06
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|
10.91
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| Net asset value, ending balance |
[1] |
93.68
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|
36.32
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|
93.68
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|
36.32
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| Market value per share, beginning balance |
[1],[3] |
80.64
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24.53
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|
45.49
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|
25.23
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| Market value per share, ending balance |
[1],[3] |
$ 93.75
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$ 36.61
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$ 93.75
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$ 36.61
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| Total Return, at net asset value |
[1] |
16.90%
|
[4] |
45.70%
|
[5] |
105.30%
|
[4] |
42.90%
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[5] |
| Total Return, at market value |
[1] |
16.30%
|
[4] |
49.20%
|
[5] |
106.10%
|
[4] |
45.10%
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[5] |
| Ratios to Average Net Assets |
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| Expense ratio |
[1],[6] |
1.50%
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1.42%
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|
1.52%
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|
1.36%
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| Expense ratio, excluding brokerage commissions |
[1],[6] |
0.95%
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0.95%
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|
0.95%
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|
0.95%
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| Net investment income (loss) |
[1],[6] |
(0.66%)
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(1.17%)
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(0.80%)
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(1.13%)
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| ProShares Ultra VIX Short-Term Futures ETF [Member] |
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| Investment Company, Financial Highlights [Line Items] |
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| Net asset value, beginning balance |
[1] |
$ 39.32
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$ 912.60
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$ 173.93
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$ 2,808.40
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| Net investment income (loss) |
[1] |
(0.09)
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|
(1.64)
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|
(0.43)
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|
(9.40)
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| Net realized and unrealized gain (loss) |
[1],[2] |
(18.59)
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(572.92)
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(152.86)
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(2,460.96)
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| Change in net asset value from operations |
[1] |
(18.68)
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|
(574.56)
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(153.29)
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(2,470.36)
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| Net asset value, ending balance |
[1] |
20.64
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|
338.04
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20.64
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|
338.04
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| Market value per share, beginning balance |
[1],[3] |
38.96
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|
943.00
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|
175.00
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|
2,835.00
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| Market value per share, ending balance |
[1],[3] |
$ 20.60
|
|
$ 333.00
|
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$ 20.60
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$ 333.00
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| Total Return, at net asset value |
[1] |
(47.50%)
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[4] |
(63.00%)
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[5] |
(88.10%)
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[4] |
(88.00%)
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[5] |
| Total Return, at market value |
[1] |
(47.10%)
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[4] |
(64.70%)
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[5] |
(88.20%)
|
[4] |
(88.30%)
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[5] |
| Ratios to Average Net Assets |
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| Expense ratio |
[1],[6] |
2.00%
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1.59%
|
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1.88%
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|
1.56%
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| Expense ratio, excluding brokerage commissions |
[1],[6] |
0.95%
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0.95%
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|
0.95%
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|
0.95%
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| Net investment income (loss) |
[1],[6] |
(1.21%)
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(1.36%)
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(1.28%)
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(1.33%)
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| ProShares UltraShort Bloomberg Crude Oil [Member] |
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| Investment Company, Financial Highlights [Line Items] |
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| Net asset value, beginning balance |
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$ 43.43
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$ 40.97
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[1] |
$ 31.70
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|
$ 66.60
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[1] |
| Net investment income (loss) |
|
0.00
|
[7] |
(0.09)
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[1] |
(0.08)
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|
(0.31)
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[1] |
| Net realized and unrealized gain (loss) |
[2] |
(9.83)
|
|
(0.88)
|
[1] |
1.98
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|
(26.29)
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[1] |
| Change in net asset value from operations |
|
(9.83)
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|
(0.97)
|
[1] |
1.90
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|
(26.60)
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[1] |
| Net asset value, ending balance |
|
33.60
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|
40.00
|
[1] |
33.60
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|
40.00
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[1] |
| Market value per share, beginning balance |
[3] |
43.21
|
|
40.81
|
[1] |
31.65
|
|
66.82
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[1] |
| Market value per share, ending balance |
[3] |
$ 33.73
|
|
$ 40.45
|
[1] |
$ 33.73
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$ 40.45
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[1] |
| Total Return, at net asset value |
|
(22.60%)
|
[4] |
(2.40%)
|
[1],[5] |
6.00%
|
[4] |
(39.90%)
|
[1],[5] |
| Total Return, at market value |
|
(21.90%)
|
[4] |
(0.90%)
|
[1],[5] |
6.60%
|
[4] |
(39.50%)
|
[1],[5] |
| Ratios to Average Net Assets |
|
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| Expense ratio |
[6] |
0.99%
|
|
1.01%
|
[1] |
0.99%
|
|
1.04%
|
[1] |
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
[1] |
0.95%
|
|
0.95%
|
[1] |
| Net investment income (loss) |
[6] |
(0.03%)
|
|
(0.75%)
|
[1] |
(0.29%)
|
|
(0.79%)
|
[1] |
| Pro Shares UltraPro 3X Short Crude Oil ETF [Member] |
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| Investment Company, Financial Highlights [Line Items] |
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| Net asset value, beginning balance |
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$ 26.46
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|
|
$ 25.00
|
[8] |
|
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| Net investment income (loss) |
|
(0.07)
|
|
|
|
(0.16)
|
[8] |
|
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| Net realized and unrealized gain (loss) |
[2] |
(8.87)
|
|
|
|
(7.32)
|
[8] |
|
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| Change in net asset value from operations |
|
(8.94)
|
|
|
|
(7.48)
|
[8] |
|
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| Net asset value, ending balance |
[8],[9] |
17.52
|
|
|
|
17.52
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|
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| Market value per share, beginning balance |
[3] |
26.24
|
|
|
|
25.00
|
[8] |
|
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| Market value per share, ending balance |
[3],[8],[9] |
$ 17.63
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|
|
$ 17.63
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| Total Return, at net asset value |
[4] |
(33.80%)
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|
|
(29.90%)
|
[8] |
|
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| Total Return, at market value |
[4] |
(32.80%)
|
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|
|
(29.50%)
|
[8] |
|
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| Ratios to Average Net Assets |
|
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|
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|
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| Expense ratio |
[6] |
1.31%
|
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|
|
1.34%
|
[8] |
|
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| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
|
|
0.95%
|
[8] |
|
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| Net investment income (loss) |
[6] |
(1.31%)
|
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|
|
(1.34%)
|
[8] |
|
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| ProShares UltraShort Yen [Member] |
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| Investment Company, Financial Highlights [Line Items] |
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| Net asset value, beginning balance |
|
$ 74.07
|
|
$ 63.53
|
|
$ 80.24
|
|
$ 87.94
|
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| Net investment income (loss) |
|
0.01
|
|
(0.11)
|
|
(0.14)
|
|
(0.38)
|
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| Net realized and unrealized gain (loss) |
[2] |
0.18
|
|
(2.74)
|
|
(5.84)
|
|
(26.88)
|
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| Change in net asset value from operations |
|
0.19
|
|
(2.85)
|
|
(5.98)
|
|
(27.26)
|
|
| Net asset value, ending balance |
|
74.26
|
|
60.68
|
|
74.26
|
|
60.68
|
|
| Market value per share, beginning balance |
[3] |
74.05
|
|
63.53
|
|
80.25
|
|
87.89
|
|
| Market value per share, ending balance |
[3] |
$ 74.21
|
|
$ 60.64
|
|
$ 74.21
|
|
$ 60.64
|
|
| Total Return, at net asset value |
|
0.30%
|
[4] |
(4.50%)
|
[5] |
(7.50%)
|
[4] |
(31.00%)
|
[5] |
| Total Return, at market value |
|
0.20%
|
[4] |
(4.50%)
|
[5] |
(7.50%)
|
[4] |
(31.00%)
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
0.03%
|
|
(0.69%)
|
|
(0.26%)
|
|
(0.74%)
|
|
| ProShares Ultra Bloomberg Crude Oil [Member] |
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|
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|
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| Investment Company, Financial Highlights [Line Items] |
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| Net asset value, beginning balance |
|
$ 14.80
|
|
$ 24.33
|
[1] |
$ 23.34
|
|
$ 25.15
|
[1] |
| Net investment income (loss) |
|
0.00
|
[10] |
(0.04)
|
[1] |
(0.03)
|
|
(0.12)
|
[1] |
| Net realized and unrealized gain (loss) |
[2] |
3.10
|
|
(3.27)
|
[1] |
(5.41)
|
|
(4.01)
|
[1] |
| Change in net asset value from operations |
|
3.10
|
|
(3.31)
|
[1] |
(5.44)
|
|
(4.13)
|
[1] |
| Net asset value, ending balance |
|
17.90
|
|
21.02
|
[1] |
17.90
|
|
21.02
|
[1] |
| Market value per share, beginning balance |
[3] |
14.86
|
|
24.44
|
[1] |
23.36
|
|
25.08
|
[1] |
| Market value per share, ending balance |
[3] |
$ 17.82
|
|
$ 20.76
|
[1] |
$ 17.82
|
|
$ 20.76
|
[1] |
| Total Return, at net asset value |
|
20.90%
|
[4] |
(13.60%)
|
[1],[5] |
(23.30%)
|
[4] |
(16.40%)
|
[1],[5] |
| Total Return, at market value |
|
19.90%
|
[4] |
(15.10%)
|
[1],[5] |
(23.70%)
|
[4] |
(17.20%)
|
[1],[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.97%
|
|
1.00%
|
[1] |
0.97%
|
|
1.02%
|
[1] |
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
[1] |
0.95%
|
|
0.95%
|
[1] |
| Net investment income (loss) |
[6] |
(0.01%)
|
|
(0.75%)
|
[1] |
(0.24%)
|
|
(0.78%)
|
[1] |
| Proshares Ultra Pro 3X Crude Oil ETF [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
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|
|
| Net asset value, beginning balance |
|
$ 19.52
|
|
|
|
$ 25.00
|
|
|
|
| Net investment income (loss) |
|
(0.07)
|
|
|
|
(0.14)
|
|
|
|
| Net realized and unrealized gain (loss) |
[2] |
5.82
|
|
|
|
0.41
|
|
|
|
| Change in net asset value from operations |
|
5.75
|
|
|
|
0.27
|
|
|
|
| Net asset value, ending balance |
|
25.27
|
|
|
|
25.27
|
|
|
|
| Market value per share, beginning balance |
[3] |
19.68
|
|
|
|
25.00
|
|
|
|
| Market value per share, ending balance |
[3] |
$ 25.09
|
|
|
|
$ 25.09
|
|
|
|
| Total Return, at net asset value |
[4] |
29.50%
|
|
|
|
1.10%
|
|
|
|
| Total Return, at market value |
[4] |
27.50%
|
|
|
|
0.40%
|
|
|
|
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
1.24%
|
|
|
|
1.26%
|
|
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
|
|
0.95%
|
|
|
|
| Net investment income (loss) |
[6] |
(1.24%)
|
|
|
|
(1.26%)
|
|
|
|
| ProShares Ultra Bloomberg Natural Gas [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 9.77
|
|
$ 17.75
|
|
$ 18.85
|
|
$ 18.57
|
|
| Net investment income (loss) |
|
(0.01)
|
|
(0.04)
|
|
(0.05)
|
|
(0.12)
|
|
| Net realized and unrealized gain (loss) |
[2] |
(1.02)
|
|
(3.23)
|
|
(10.06)
|
|
(3.97)
|
|
| Change in net asset value from operations |
|
(1.03)
|
|
(3.27)
|
|
(10.11)
|
|
(4.09)
|
|
| Net asset value, ending balance |
|
8.74
|
|
14.48
|
|
8.74
|
|
14.48
|
|
| Market value per share, beginning balance |
[3] |
9.74
|
|
17.65
|
|
18.96
|
|
18.48
|
|
| Market value per share, ending balance |
[3] |
$ 8.80
|
|
$ 14.58
|
|
$ 8.80
|
|
$ 14.58
|
|
| Total Return, at net asset value |
|
(10.50%)
|
[4] |
(18.40%)
|
[5] |
(53.60%)
|
[4] |
(22.00%)
|
[5] |
| Total Return, at market value |
|
(9.70%)
|
[4] |
(17.40%)
|
[5] |
(53.60%)
|
[4] |
(21.10%)
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
1.16%
|
|
1.23%
|
|
1.16%
|
|
1.36%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
(0.37%)
|
|
(1.03%)
|
|
(0.57%)
|
|
(1.17%)
|
|
| ProShares Ultra Gold [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 37.75
|
|
$ 44.80
|
|
$ 32.90
|
|
$ 29.73
|
|
| Net investment income (loss) |
|
0.00
|
[7] |
(0.08)
|
|
(0.06)
|
|
(0.21)
|
|
| Net realized and unrealized gain (loss) |
[2] |
2.07
|
|
(0.30)
|
|
6.98
|
|
14.90
|
|
| Change in net asset value from operations |
|
2.07
|
|
(0.38)
|
|
6.92
|
|
14.69
|
|
| Net asset value, ending balance |
|
39.82
|
|
44.42
|
|
39.82
|
|
44.42
|
|
| Market value per share, beginning balance |
[3] |
37.68
|
|
45.03
|
|
33.20
|
|
29.73
|
|
| Market value per share, ending balance |
[3] |
$ 39.60
|
|
$ 44.01
|
|
$ 39.60
|
|
$ 44.01
|
|
| Total Return, at net asset value |
|
5.50%
|
[4] |
(0.80%)
|
[5] |
21.00%
|
[4] |
49.40%
|
[5] |
| Total Return, at market value |
|
5.10%
|
[4] |
(2.30%)
|
[5] |
19.30%
|
[4] |
48.00%
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
0.03%
|
|
(0.67%)
|
|
(0.22%)
|
|
(0.69%)
|
|
| ProShares Ultra Silver [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 33.23
|
|
$ 45.53
|
|
$ 33.44
|
|
$ 27.06
|
|
| Net investment income (loss) |
|
0.00
|
[7] |
(0.09)
|
|
(0.06)
|
|
(0.21)
|
|
| Net realized and unrealized gain (loss) |
[2] |
0.79
|
|
3.56
|
|
0.64
|
|
22.15
|
|
| Change in net asset value from operations |
|
0.79
|
|
3.47
|
|
0.58
|
|
21.94
|
|
| Net asset value, ending balance |
|
34.02
|
|
49.00
|
|
34.02
|
|
49.00
|
|
| Market value per share, beginning balance |
[3] |
33.82
|
|
47.67
|
|
32.09
|
|
27.08
|
|
| Market value per share, ending balance |
[3] |
$ 33.15
|
|
$ 48.11
|
|
$ 33.15
|
|
$ 48.11
|
|
| Total Return, at net asset value |
|
2.40%
|
[4] |
7.60%
|
[5] |
1.70%
|
[4] |
81.10%
|
[5] |
| Total Return, at market value |
|
(2.00%)
|
[4] |
0.90%
|
[5] |
3.30%
|
[4] |
77.70%
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
0.00%
|
[11] |
(0.68%)
|
|
(0.23%)
|
|
(0.71%)
|
|
| ProShares Ultra Euro [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 16.16
|
|
$ 15.89
|
|
$ 14.02
|
|
$ 15.51
|
|
| Net investment income (loss) |
|
0.00
|
[10] |
(0.03)
|
|
(0.03)
|
|
(0.08)
|
|
| Net realized and unrealized gain (loss) |
[2] |
0.97
|
|
0.27
|
|
3.14
|
|
0.70
|
|
| Change in net asset value from operations |
|
0.97
|
|
0.24
|
|
3.11
|
|
0.62
|
|
| Net asset value, ending balance |
|
17.13
|
|
16.13
|
|
17.13
|
|
16.13
|
|
| Market value per share, beginning balance |
[3] |
16.17
|
|
15.86
|
|
14.09
|
|
15.51
|
|
| Market value per share, ending balance |
[3] |
$ 17.10
|
|
$ 16.12
|
|
$ 17.10
|
|
$ 16.12
|
|
| Total Return, at net asset value |
|
6.00%
|
[4] |
1.50%
|
[5] |
22.20%
|
[4] |
4.00%
|
[5] |
| Total Return, at market value |
|
5.80%
|
[4] |
1.60%
|
[5] |
21.40%
|
[4] |
3.90%
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
(0.04%)
|
|
(0.69%)
|
|
(0.26%)
|
|
(0.71%)
|
|
| ProShares Ultra Yen [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 58.68
|
|
$ 72.67
|
|
$ 55.43
|
|
$ 54.75
|
|
| Net investment income (loss) |
|
(0.04)
|
|
(0.13)
|
|
(0.21)
|
|
(0.36)
|
|
| Net realized and unrealized gain (loss) |
[2] |
(0.57)
|
|
1.92
|
|
2.85
|
|
20.07
|
|
| Change in net asset value from operations |
|
(0.61)
|
|
1.79
|
|
2.64
|
|
19.71
|
|
| Net asset value, ending balance |
|
58.07
|
|
74.46
|
|
58.07
|
|
74.46
|
|
| Market value per share, beginning balance |
[3] |
58.68
|
|
72.71
|
|
55.52
|
|
54.70
|
|
| Market value per share, ending balance |
[3] |
$ 58.17
|
|
$ 74.48
|
|
$ 58.17
|
|
$ 74.48
|
|
| Total Return, at net asset value |
|
(1.00%)
|
[4] |
2.50%
|
[5] |
4.80%
|
[4] |
36.00%
|
[5] |
| Total Return, at market value |
|
(0.90%)
|
[4] |
2.40%
|
[5] |
4.80%
|
[4] |
36.20%
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
(0.28%)
|
|
(0.70%)
|
|
(0.47%)
|
|
(0.71%)
|
|
| ProShares UltraShort Bloomberg Natural Gas [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 33.16
|
|
$ 34.09
|
|
$ 23.10
|
|
$ 46.53
|
|
| Net investment income (loss) |
|
(0.06)
|
|
(0.13)
|
|
(0.20)
|
|
(0.57)
|
|
| Net realized and unrealized gain (loss) |
[2] |
0.77
|
|
2.36
|
|
10.97
|
|
(9.64)
|
|
| Change in net asset value from operations |
|
0.71
|
|
2.23
|
|
10.77
|
|
(10.21)
|
|
| Net asset value, ending balance |
|
33.87
|
|
36.32
|
|
33.87
|
|
36.32
|
|
| Market value per share, beginning balance |
[3] |
33.33
|
|
34.06
|
|
23.05
|
|
46.55
|
|
| Market value per share, ending balance |
[3] |
$ 33.64
|
|
$ 36.14
|
|
$ 33.64
|
|
$ 36.14
|
|
| Total Return, at net asset value |
|
2.10%
|
[4] |
6.50%
|
[5] |
46.60%
|
[4] |
(22.00%)
|
[5] |
| Total Return, at market value |
|
0.90%
|
[4] |
6.10%
|
[5] |
45.90%
|
[4] |
(22.40%)
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
1.34%
|
|
1.58%
|
|
1.32%
|
|
1.68%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
(0.73%)
|
|
(1.40%)
|
|
(0.83%)
|
|
(1.46%)
|
|
| ProShares UltraShort Gold [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 76.30
|
|
$ 70.31
|
|
$ 91.33
|
|
$ 115.88
|
|
| Net investment income (loss) |
|
0.00
|
[10] |
(0.12)
|
|
(0.13)
|
|
(0.42)
|
|
| Net realized and unrealized gain (loss) |
[2] |
(5.02)
|
|
(0.58)
|
|
(19.92)
|
|
(45.85)
|
|
| Change in net asset value from operations |
|
(5.02)
|
|
(0.70)
|
|
(20.05)
|
|
(46.27)
|
|
| Net asset value, ending balance |
|
71.28
|
|
69.61
|
|
71.28
|
|
69.61
|
|
| Market value per share, beginning balance |
[3] |
76.37
|
|
70.00
|
|
90.54
|
|
115.83
|
|
| Market value per share, ending balance |
[3] |
$ 71.55
|
|
$ 70.19
|
|
$ 71.55
|
|
$ 70.19
|
|
| Total Return, at net asset value |
|
(6.60%)
|
[4] |
(1.00%)
|
[5] |
(22.00%)
|
[4] |
(39.90%)
|
[5] |
| Total Return, at market value |
|
(6.30%)
|
[4] |
0.30%
|
[5] |
(21.00%)
|
[4] |
(39.40%)
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
(0.01%)
|
|
(0.69%)
|
|
(0.23%)
|
|
(0.71%)
|
|
| ProShares UltraShort Silver [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 34.75
|
|
$ 33.16
|
|
$ 37.31
|
|
$ 64.58
|
|
| Net investment income (loss) |
|
0.00
|
[10] |
(0.05)
|
|
(0.06)
|
|
(0.21)
|
|
| Net realized and unrealized gain (loss) |
[2] |
(2.76)
|
|
(5.17)
|
|
(5.26)
|
|
(36.43)
|
|
| Change in net asset value from operations |
|
(2.76)
|
|
(5.22)
|
|
(5.32)
|
|
(36.64)
|
|
| Net asset value, ending balance |
|
31.99
|
|
27.94
|
|
31.99
|
|
27.94
|
|
| Market value per share, beginning balance |
[3] |
34.09
|
|
31.65
|
|
38.76
|
|
64.55
|
|
| Market value per share, ending balance |
[3] |
$ 32.78
|
|
$ 28.41
|
|
$ 32.78
|
|
$ 28.41
|
|
| Total Return, at net asset value |
|
(7.90%)
|
[4] |
(15.80%)
|
[5] |
(14.30%)
|
[4] |
(56.70%)
|
[5] |
| Total Return, at market value |
|
(3.80%)
|
[4] |
(10.20%)
|
[5] |
(15.40%)
|
[4] |
(56.00%)
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
(0.05%)
|
|
(0.70%)
|
|
(0.27%)
|
|
(0.71%)
|
|
| ProShares Short Euro [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 41.74
|
|
$ 42.81
|
|
$ 45.06
|
|
$ 43.78
|
|
| Net investment income (loss) |
|
(0.01)
|
|
(0.08)
|
|
(0.12)
|
|
(0.25)
|
|
| Net realized and unrealized gain (loss) |
[2] |
(1.26)
|
|
(0.51)
|
|
(4.47)
|
|
(1.31)
|
|
| Change in net asset value from operations |
|
(1.27)
|
|
(0.59)
|
|
(4.59)
|
|
(1.56)
|
|
| Net asset value, ending balance |
|
40.47
|
|
42.22
|
|
40.47
|
|
42.22
|
|
| Market value per share, beginning balance |
[3] |
41.71
|
|
42.81
|
|
45.12
|
|
43.74
|
|
| Market value per share, ending balance |
[3] |
$ 40.56
|
|
$ 42.22
|
|
$ 40.56
|
|
$ 42.22
|
|
| Total Return, at net asset value |
|
(3.00%)
|
[4] |
(1.40%)
|
[5] |
(10.20%)
|
[4] |
(3.60%)
|
[5] |
| Total Return, at market value |
|
(2.80%)
|
[4] |
(1.40%)
|
[5] |
(10.10%)
|
[4] |
(3.50%)
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.96%
|
|
0.96%
|
|
0.96%
|
|
0.97%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
(0.14%)
|
|
(0.75%)
|
|
(0.37%)
|
|
(0.78%)
|
|
| ProShares UltraShort Australian Dollar [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 47.90
|
|
$ 53.47
|
|
$ 55.38
|
|
$ 58.46
|
|
| Net investment income (loss) |
|
(0.01)
|
|
(0.10)
|
|
(0.15)
|
|
(0.33)
|
|
| Net realized and unrealized gain (loss) |
[2] |
(2.26)
|
|
(3.69)
|
|
(9.60)
|
|
(8.45)
|
|
| Change in net asset value from operations |
|
(2.27)
|
|
(3.79)
|
|
(9.75)
|
|
(8.78)
|
|
| Net asset value, ending balance |
|
45.63
|
|
49.68
|
|
45.63
|
|
49.68
|
|
| Market value per share, beginning balance |
[3] |
47.80
|
|
53.47
|
|
55.24
|
|
58.15
|
|
| Market value per share, ending balance |
[3] |
$ 45.85
|
|
$ 49.67
|
|
$ 45.85
|
|
$ 49.67
|
|
| Total Return, at net asset value |
|
(4.70%)
|
[4] |
(7.10%)
|
[5] |
(17.60%)
|
[4] |
(15.00%)
|
[5] |
| Total Return, at market value |
|
(4.10%)
|
[4] |
(7.10%)
|
[5] |
(17.00%)
|
[4] |
(14.60%)
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
1.01%
|
|
1.02%
|
|
1.01%
|
|
1.03%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
(0.13%)
|
|
(0.75%)
|
|
(0.42%)
|
|
(0.80%)
|
|
| ProShares UltraShort Euro [Member] |
|
|
|
|
|
|
|
|
|
| Investment Company, Financial Highlights [Line Items] |
|
|
|
|
|
|
|
|
|
| Net asset value, beginning balance |
|
$ 23.12
|
|
$ 24.32
|
|
$ 27.08
|
|
$ 25.54
|
|
| Net investment income (loss) |
|
0.00
|
[7] |
(0.04)
|
|
(0.04)
|
|
(0.13)
|
|
| Net realized and unrealized gain (loss) |
[2] |
(1.43)
|
|
(0.50)
|
|
(5.35)
|
|
(1.63)
|
|
| Change in net asset value from operations |
|
(1.43)
|
|
(0.54)
|
|
(5.39)
|
|
(1.76)
|
|
| Net asset value, ending balance |
|
21.69
|
|
23.78
|
|
21.69
|
|
23.78
|
|
| Market value per share, beginning balance |
[3] |
23.12
|
|
24.32
|
|
27.08
|
|
25.53
|
|
| Market value per share, ending balance |
[3] |
$ 21.68
|
|
$ 23.76
|
|
$ 21.68
|
|
$ 23.76
|
|
| Total Return, at net asset value |
|
(6.20%)
|
[4] |
(2.20%)
|
[5] |
(19.90%)
|
[4] |
(6.90%)
|
[5] |
| Total Return, at market value |
|
(6.20%)
|
[4] |
(2.30%)
|
[5] |
(19.90%)
|
[4] |
(6.90%)
|
[5] |
| Ratios to Average Net Assets |
|
|
|
|
|
|
|
|
|
| Expense ratio |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Expense ratio, excluding brokerage commissions |
[6] |
0.95%
|
|
0.95%
|
|
0.95%
|
|
0.95%
|
|
| Net investment income (loss) |
[6] |
0.04%
|
|
(0.69%)
|
|
(0.23%)
|
|
(0.70%)
|
|
|
|