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Creation and Redemption of Creation Units - Schedule of Transaction Fees (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, 2014
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| Creation And Redemption Of Creation Units [Line Items] |
|
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| Transaction fees |
$ 300,820 |
$ 709,171 |
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ProShares UltraShort Bloomberg Commodity [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares UltraShort Bloomberg Crude Oil [Member]
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|
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| Creation And Redemption Of Creation Units [Line Items] |
|
|
| Transaction fees |
60,921 |
145,500 |
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ProShares UltraShort Bloomberg Natural Gas [Member]
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|
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
4,211 |
16,904 |
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ProShares UltraShort Gold [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
9,726 |
23,106 |
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ProShares UltraShort Silver [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
8,515 |
35,268 |
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ProShares Short Euro [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares UltraShort Australian Dollar [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares UltraShort Euro [Member]
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|
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares UltraShort Yen [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares Ultra Bloomberg Commodity [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
249 |
249 |
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ProShares Ultra Bloomberg Crude Oil [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
17,201 |
86,774 |
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ProShares Ultra Bloomberg Natural Gas [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
1,876 |
9,516 |
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ProShares Ultra Gold [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
1,989 |
6,998 |
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ProShares Ultra Silver [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
14,593 |
38,063 |
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ProShares Ultra Australian Dollar [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares Ultra Euro [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares Ultra Yen [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares VIX Short-Term Futures ETF [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares VIX Mid-Term Futures ETF [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
0 |
0 |
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ProShares Ultra VIX Short-Term Futures ETF [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
148,865 |
282,819 |
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ProShares Short VIX Short-Term Futures ETF [Member]
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| Creation And Redemption Of Creation Units [Line Items] |
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| Transaction fees |
$ 32,674 |
$ 63,974 |