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Organization - Schedule of Share Splits and Reverse Share Splits (Detail)
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0 Months Ended | |
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Jan. 21, 2014
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Jun. 10, 2013
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ProShares UltraShort DJ-UBS Natural Gas [Member]
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| Organization [Line Items] | ||
| Execution Date (Prior to Opening of Trading) | June 10, 2013 | |
| Date Trading Resumed at Post- Split Price | June 10, 2013 | |
| Funds Reverse Split | 1-for-4 reverse Share split | |
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ProShares Ultra Silver [Member]
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| Organization [Line Items] | ||
| Execution Date (Prior to Opening of Trading) | January 21, 2014 | |
| Date Trading Resumed at Post- Split Price | January 24, 2014 | |
| Funds Reverse Split | 1-for-4 reverse Share split | |
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ProShares VIX Short-Term Futures ETF [Member]
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| Organization [Line Items] | ||
| Execution Date (Prior to Opening of Trading) | June 10, 2013 | |
| Date Trading Resumed at Post- Split Price | June 10, 2013 | |
| Funds Reverse Split | 1-for-5 reverse Share split | |
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ProShares Ultra VIX Short-Term Futures ETF [Member]
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| Organization [Line Items] | ||
| Execution Date (Prior to Opening of Trading) | January 21, 2014 | June 10, 2013 |
| Date Trading Resumed at Post- Split Price | January 24, 2014 | June 10, 2013 |
| Funds Reverse Split | 1-for-4 reverse Share split | 1-for-10 reverse Share split |
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ProShares Short VIX Short-Term Futures ETF [Member]
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| Organization [Line Items] | ||
| Execution Date (Prior to Opening of Trading) | January 21, 2014 | |
| Date Trading Resumed at Post- Split Price | January 24, 2014 | |
| Funds Split | 2-for-1 Share split | |