v2.4.0.8

Creation and Redemption of Creation Units (Schedule of Transaction Fees) (Detail) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | $ 408,351
ProShares UltraShort DJ-UBS Commodity [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares UltraShort DJ-UBS Crude Oil [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 84,579
ProShares UltraShort DJ-UBS Natural Gas [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 12,693
ProShares UltraShort Gold [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 13,380
ProShares UltraShort Silver [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 26,753
ProShares Short Euro [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares UltraShort Australian Dollar [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares UltraShort Euro [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares UltraShort Yen [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares Ultra DJ-UBS Commodity [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares Ultra DJ-UBS Crude Oil [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 69,573
ProShares Ultra DJ-UBS Natural Gas [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 7,640
ProShares Ultra Gold [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 5,009
ProShares Ultra Silver [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 23,470
ProShares Ultra Australian Dollar [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares Ultra Euro [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares Ultra Yen [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares VIX Short-Term Futures ETF [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares VIX Mid-Term Futures ETF [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees |
ProShares Ultra VIX Short-Term Futures ETF [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | 133,954
ProShares Short VIX Short-Term Futures ETF [Member] |
Creation And Redemption Of Creation Units [Line Items] |
Transaction fees | $ 31,300

X
- Details
Name: | ck0001415311_CreationAndRedemptionOfCreationUnitsLineItems
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Transaction fees. + References No definition available. + Details
Name: | ck0001415311_TransactionFees
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration