v2.4.0.8

Schedule of Investments - Futures Contracts Purchased (Parenthetical) (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 2,639,670
ProShares Ultra Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	2,725,580
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	13,200
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	9,075
ProShares Ultra Australian Dollar [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	127,050
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	20,781,600
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	5,859,000
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Cash collateral pledged to cover margin requirements	$ 124,654,800

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- Definition

Cash collateral pledged to cover margin requirements.

+ References

No definition available.

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- Details

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