v3.10.0.1

Financial Highlights - Per Share Operating Performance (Parenthetical) (Detail) | Jun. 30, 2017 $ / shares | [1]
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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]
[1] | From commencement of operations, March 24, 2017 through June 30, 2017.
[2] | See Note 1 of these Notes to Financial Statements.

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