Financial Highlights - Per Share Operating Performance (Parenthetical) (Detail) |
Jun. 30, 2017
$ / shares
|
[1] | ||||
|---|---|---|---|---|---|---|
| Proshares Ultra Pro 3x Crude Oil ETF [Member] | ||||||
| Investment Company, Financial Highlights [Line Items] | ||||||
| Returns for a share outstanding | $ 25.00 | |||||
| ProShares UltraPro 3X Short Crude Oil ETF [Member] | ||||||
| Investment Company, Financial Highlights [Line Items] | ||||||
| Returns for a share outstanding | $ 100.00 | [2] | ||||
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