v2.4.1.9

Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Detail) (USD $) | Mar. 31, 2015
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ProShares VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | $ 131,184,020 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,181,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 5,180,968 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.026% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,973,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 3,972,856 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,724,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 4,723,859 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.017% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 9,229,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSevenPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 9,228,680 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSevenPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.049% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 18,620,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourNinePercentageDueMayTwentyEighthTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 18,619,116 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourNinePercentageDueMayTwentyEighthTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.046% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 105,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSixPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 104,996 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSixPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.013% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,645,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneThreePercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 3,644,856 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneThreePercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.016% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 7,018,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 7,017,772 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.021% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 8,833,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoOnePercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 8,832,792 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoOnePercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | [1]
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.024% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 12,954,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoFourPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 12,953,006 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoFourPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.039% Due 07/09/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,121,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeNinePercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 3,120,828 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeNinePercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 11,521,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 11,519,812 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 10,365,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 10,363,861 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.035% Due 07/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 907,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 906,879 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.057% Due 08/06/2015 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 7,920,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSevenPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 7,918,463 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSevenPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | [1]
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.050% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 23,080,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 23,075,276 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | [1]
ProShares VIX Mid-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 27,675,412 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,167,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total short-term U.S. government and Value | 6,166,364 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,374,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total short-term U.S. government and Value | 5,373,967 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 04/30/2015 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,593,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total short-term U.S. government and Value | 1,592,942 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.031% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,405,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeOnePercentageDueAprilTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total short-term U.S. government and Value | 5,404,813 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeOnePercentageDueAprilTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.071% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 851,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenOnePercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total short-term U.S. government and Value | 850,960 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenOnePercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,675,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroEightSevenPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total short-term U.S. government and Value | 3,674,855 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroEightSevenPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,773,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total short-term U.S. government and Value | 1,772,942 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.030% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,020,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulySevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total short-term U.S. government and Value | 1,019,922 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulySevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] | U.S. Treasury Bills 0.045% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,819,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 1,818,647 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | [1]
ProShares Short VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 222,919,943 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,920,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 6,919,957 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 19,284,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 19,283,373 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.044% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 12,864,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFourPercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 12,863,615 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFourPercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.032% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 12,226,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeTwoPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 12,225,576 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeTwoPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.073% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,786,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenThreePercentageDueMayTwentyEighthTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 3,785,820 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenThreePercentageDueMayTwentyEighthTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 13,984,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 13,983,502 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.017% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,401,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSevenPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 4,400,827 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSevenPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.041% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 25,966,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 25,965,387 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.022% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 43,634,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoTwoPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 43,630,653 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoTwoPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.057% Due 07/19/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 16,047,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSevenPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 16,046,118 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSevenPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.028% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 21,796,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoEightPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 21,793,753 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoEightPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.047% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,213,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 4,212,537 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.030% Due 07/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 20,999,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 20,996,201 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,164,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 6,162,804 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.045% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 10,652,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 10,649,820 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | [1]
ProShares Ultra VIX Short-Term Futures ETF [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 569,900,064 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 212,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 211,999 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,104,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 3,103,907 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.046% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 27,212,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSixPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 27,211,031 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSixPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.021% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 76,304,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoOnePercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 76,302,199 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoOnePercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.001% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 29,754,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroOnePercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 29,752,923 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroOnePercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.012% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 13,489,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneTwoPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 13,488,532 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneTwoPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.018% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 75,945,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneEightPercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 75,941,393 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneEightPercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.010% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 10,230,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneZeroPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 10,229,597 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneZeroPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.013% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 8,550,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneThreePercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 8,549,722 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneThreePercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.015% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 8,100,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 8,099,379 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.040% Due 07/09/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 73,985,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 73,980,931 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.027% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 46,270,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 46,265,229 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.037% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 15,294,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSevenPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total short-term U.S. government and Value | 15,292,319 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSevenPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.031% Due 07/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 46,862,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeOnePercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 46,855,753 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeOnePercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.046% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 66,459,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSixPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 66,446,107 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSixPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 0.048% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 68,183,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourEightPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
Total short-term U.S. government and Value | 68,169,043 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourEightPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | [1]
ProShares UltraShort Bloomberg Commodity [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 4,990,827 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.016% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 607,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Total short-term U.S. government and Value | 606,980 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 877,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroEightSevenPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | [2]
Total short-term U.S. government and Value | 876,965 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroEightSevenPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | [2]
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.039% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,131,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeNinePercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | [2]
Total short-term U.S. government and Value | 2,130,987 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeNinePercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | [2]
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.050% Due 07/09/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 828,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | [2]
Total short-term U.S. government and Value | 827,955 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | [2]
ProShares UltraShort Bloomberg Commodity [Member] | U.S. Treasury Bills 0.038% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 548,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | [2]
Total short-term U.S. government and Value | 547,940 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | [2]
ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 319,733,997 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.026% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 29,818,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Total short-term U.S. government and Value | 29,816,921 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 8,635,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Total short-term U.S. government and Value | 8,634,946 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.064% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,795,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixFourPercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 6,794,797 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixFourPercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.023% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 7,636,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoThreePercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 7,635,735 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoThreePercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.020% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 40,758,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoZeroPercentageDueMayTwentyEightTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Total short-term U.S. government and Value | 40,756,064 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoZeroPercentageDueMayTwentyEightTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.069% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,555,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixNinePercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Total short-term U.S. government and Value | 6,554,767 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixNinePercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.013% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 39,293,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneThreePercentageDueJuneElevenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 39,291,452 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneThreePercentageDueJuneElevenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.002% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 31,032,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroTwoPercentageDueJuneEighteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 31,030,991 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroTwoPercentageDueJuneEighteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.015% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 12,887,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 12,886,696 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.023% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 54,556,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoThreePercentageDueJulyTwoTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 54,551,815 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoThreePercentageDueJulyTwoTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.029% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 13,419,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoNinePercentageDueJulySixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 13,417,616 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoNinePercentageDueJulySixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.037% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 16,787,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSevenPercentageDueJulyTwentyThreeTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 16,785,155 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSevenPercentageDueJulyTwentyThreeTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.035% Due 07/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,214,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulyThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 6,213,172 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulyThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.050% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 14,741,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueAugustSixTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 14,738,140 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueAugustSixTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.044% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 30,632,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFourPercentageDueAugustThirteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 30,625,730 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFourPercentageDueAugustThirteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | [3]
ProShares UltraShort Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 8,979,498 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,097,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total short-term U.S. government and Value | 2,096,937 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.016% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,095,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total short-term U.S. government and Value | 1,094,964 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.045% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 735,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | [1]
Total short-term U.S. government and Value | 734,850 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | [1]
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.015% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,297,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | [1]
Total short-term U.S. government and Value | 2,296,824 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | [1]
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.015% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 225,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total short-term U.S. government and Value | 224,995 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.042% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 613,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourTwoPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total short-term U.S. government and Value | 612,996 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourTwoPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 790,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total short-term U.S. government and Value | 789,971 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.044% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 469,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFourPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total short-term U.S. government and Value | 468,984 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFourPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.022% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 659,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoTwoPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total short-term U.S. government and Value | 658,977 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoTwoPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 79,438,219 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.035% Due 07/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,191,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total short-term U.S. government and Value | 1,190,841 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.030% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 9,863,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulySevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
Total short-term U.S. government and Value | 9,862,244 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulySevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.045% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,915,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total short-term U.S. government and Value | 2,914,435 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.038% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,562,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
Total short-term U.S. government and Value | 2,561,718 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,572,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total short-term U.S. government and Value | 2,571,984 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.042% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,386,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourTwoPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
Total short-term U.S. government and Value | 6,385,769 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourTwoPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.056% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 25,151,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
Total short-term U.S. government and Value | 25,150,248 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,641,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
Total short-term U.S. government and Value | 2,640,908 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.005% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 530,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroFivePercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total short-term U.S. government and Value | 529,979 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroFivePercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.060% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 996,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixZeroPercentageDueJuneEighteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total short-term U.S. government and Value | 995,968 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixZeroPercentageDueJuneEighteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.024% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,661,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoFourPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total short-term U.S. government and Value | 1,660,829 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoFourPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
ProShares UltraShort Gold [Member] | U.S. Treasury Bills 0.043% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 22,978,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
Total short-term U.S. government and Value | 22,973,296 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | [4]
ProShares UltraShort Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 50,001,670 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.030% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,494,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulySevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
Total short-term U.S. government and Value | 4,493,655 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulySevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.037% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,881,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSevenPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
Total short-term U.S. government and Value | 3,880,574 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSevenPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.056% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,504,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Total short-term U.S. government and Value | 1,503,955 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.061% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,355,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Total short-term U.S. government and Value | 2,354,918 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.024% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,518,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoFourPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
Total short-term U.S. government and Value | 3,517,637 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoFourPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.054% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 7,530,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveFourPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
Total short-term U.S. government and Value | 7,529,727 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveFourPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.067% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 15,634,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixSevenPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
Total short-term U.S. government and Value | 15,633,444 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixSevenPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.027% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,981,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
Total short-term U.S. government and Value | 5,980,806 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
ProShares UltraShort Silver [Member] | U.S. Treasury Bills 0.038% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,108,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
Total short-term U.S. government and Value | 5,106,954 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | [4]
ProShares Short Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 18,012,179 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.045% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 679,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 678,861 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.050% Due 07/09/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 206,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 205,989 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.038% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 404,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 403,955 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,278,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 2,277,986 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.015% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,804,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 4,803,887 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.040% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,708,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 1,707,938 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.073% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,375,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenThreePercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 3,374,880 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenThreePercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.010% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,171,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneZeroPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 2,170,929 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneZeroPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares Short Euro [Member] | U.S. Treasury Bills 0.035% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,388,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total short-term U.S. government and Value | 2,387,754 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares UltraShort Australian Dollar [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 16,932,493 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.043% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 756,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Total short-term U.S. government and Value | 755,995 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.012% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,305,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneTwoPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Total short-term U.S. government and Value | 3,304,885 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneTwoPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.038% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 199,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | [1]
Total short-term U.S. government and Value | 198,978 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | [1]
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.015% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 11,303,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | [1]
Total short-term U.S. government and Value | 11,302,733 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | [1]
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.043% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 121,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Total short-term U.S. government and Value | 120,975 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 236,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Total short-term U.S. government and Value | 235,992 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.022% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 409,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoTwoPercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Total short-term U.S. government and Value | 408,981 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoTwoPercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
ProShares UltraShort Australian Dollar [Member] | U.S. Treasury Bills 0.050% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 604,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueJulyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | [1]
Total short-term U.S. government and Value | 603,954 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueJulyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | [1]
ProShares UltraShort Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 549,451,431 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.030% Due 07/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 22,538,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Total short-term U.S. government and Value | 22,534,996 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.050% Due 07/09/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 25,516,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
Total short-term U.S. government and Value | 25,514,597 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,717,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
Total short-term U.S. government and Value | 2,716,983 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.073% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 130,454,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenThreePercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
Total short-term U.S. government and Value | 130,449,356 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenThreePercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.048% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 51,620,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourEightPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
Total short-term U.S. government and Value | 51,618,131 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourEightPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.015% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,567,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Total short-term U.S. government and Value | 6,566,804 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.050% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 74,042,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Total short-term U.S. government and Value | 74,039,431 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.070% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,919,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenZeroPercentageDueMayTwentyEightTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Total short-term U.S. government and Value | 6,918,671 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenZeroPercentageDueMayTwentyEightTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.090% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 38,365,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroNineZeroPercentageDueJuneElevenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
Total short-term U.S. government and Value | 38,363,488 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroNineZeroPercentageDueJuneElevenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.025% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 84,059,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoFivePercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Total short-term U.S. government and Value | 84,050,333 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoFivePercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.041% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 51,595,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
Total short-term U.S. government and Value | 51,589,330 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
ProShares UltraShort Euro [Member] | U.S. Treasury Bills 0.040% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 55,100,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
Total short-term U.S. government and Value | 55,089,311 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | [5]
ProShares UltraShort Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 444,090,783 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.045% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 19,736,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
Total short-term U.S. government and Value | 19,731,960 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 81,110,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Total short-term U.S. government and Value | 81,109,497 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.056% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 17,961,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
Total short-term U.S. government and Value | 17,960,350 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveSixPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.063% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,002,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixThreePercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Total short-term U.S. government and Value | 1,001,970 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixThreePercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.070% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 9,923,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenZeroPercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
Total short-term U.S. government and Value | 9,922,656 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenZeroPercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.087% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 31,920,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroEightSevenPercentageDueJuneElevenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
Total short-term U.S. government and Value | 31,918,742 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroEightSevenPercentageDueJuneElevenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.026% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 17,106,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
Total short-term U.S. government and Value | 17,105,596 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.030% due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,564,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
Total short-term U.S. government and Value | 5,563,573 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.040% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 62,192,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Total short-term U.S. government and Value | 62,185,165 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.034% Due 07/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 174,813,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFourPercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
Total short-term U.S. government and Value | 174,789,698 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFourPercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | [5]
ProShares UltraShort Yen [Member] | U.S. Treasury Bills 0.070% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 22,806,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenZeroPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Total short-term U.S. government and Value | 22,801,576 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenZeroPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
ProShares Ultra Bloomberg Commodity [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 2,242,809 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.036% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 308,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Total short-term U.S. government and Value | 307,968 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.060% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 903,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixZeroPercentageDueJuneEighteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | [2]
Total short-term U.S. government and Value | 902,971 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixZeroPercentageDueJuneEighteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | [2]
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.043% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 549,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Total short-term U.S. government and Value | 548,888 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
ProShares Ultra Bloomberg Commodity [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 483,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | [2]
Total short-term U.S. government and Value | 482,982 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | [2]
ProShares Ultra Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 1,066,114,169 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.061% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 15,454,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Total short-term U.S. government and Value | 15,453,538 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixOnePercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.036% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 78,958,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 78,949,859 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.048% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 20,506,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourEightPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 20,501,802 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourEightPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.038% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 19,702,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Total short-term U.S. government and Value | 19,701,878 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.035% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 49,089,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Total short-term U.S. government and Value | 49,087,223 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.027% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 107,478,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 107,474,271 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.023% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 10,311,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoThreePercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 10,310,510 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoThreePercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.027% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 154,348,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Total short-term U.S. government and Value | 154,342,505 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.007% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 32,535,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroSevenPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Total short-term U.S. government and Value | 32,533,718 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroSevenPercentageDueJuneElevenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.028% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 163,086,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoEightPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 163,080,700 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoEightPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.045% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 63,939,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 63,937,491 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.027% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,114,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 4,113,685 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSevenPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.034% Due 07/09/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 49,453,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFourPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 49,450,280 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFourPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.030% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 94,595,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 94,584,604 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeZeroPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.029% Due 07/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 105,672,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoNinePercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 105,657,914 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoNinePercentageDueJulyThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 0.051% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 96,953,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveOnePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
Total short-term U.S. government and Value | 96,934,191 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveOnePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | [3]
ProShares Ultra Bloomberg Natural Gas [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 57,169,841 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.046% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 910,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSixPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total short-term U.S. government and Value | 909,968 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSixPercentageDueJuneFourTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.045% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,885,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | [1]
Total short-term U.S. government and Value | 4,884,052 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | [1]
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.028% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,392,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoEightPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | [1]
Total short-term U.S. government and Value | 6,391,341 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoEightPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | [1]
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.047% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,623,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | [1]
Total short-term U.S. government and Value | 3,622,602 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | [1]
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.040% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 10,407,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total short-term U.S. government and Value | 10,406,623 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.063% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,130,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixThreePercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total short-term U.S. government and Value | 2,129,936 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixThreePercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.026% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,447,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total short-term U.S. government and Value | 2,446,942 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueJuneTwentyFiveTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.052% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,377,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveTwoPercentageDueMayTwentyEightThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total short-term U.S. government and Value | 5,376,745 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveTwoPercentageDueMayTwentyEightThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.026% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 11,308,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total short-term U.S. government and Value | 11,307,632 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.047% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,672,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total short-term U.S. government and Value | 1,671,872 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.042% Due 07/09/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,146,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourTwoPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total short-term U.S. government and Value | 5,145,717 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourTwoPercentageDueJulyNineTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 0.039% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,877,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeNinePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | [1]
Total short-term U.S. government and Value | 2,876,411 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeNinePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | [1]
ProShares Ultra Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 94,234,586 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.042% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 13,896,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourTwoPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
Total short-term U.S. government and Value | 13,895,497 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourTwoPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.038% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 17,169,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
Total short-term U.S. government and Value | 17,165,485 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.050% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,376,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Total short-term U.S. government and Value | 5,375,813 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveZeroPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.058% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 24,874,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveEightPercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
Total short-term U.S. government and Value | 24,873,256 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveEightPercentageDueMayFourteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 11,782,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenEightPercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
Total short-term U.S. government and Value | 11,781,581 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenEightPercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.058% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 13,020,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveEightPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
Total short-term U.S. government and Value | 13,019,577 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFiveEightPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
ProShares Ultra Gold [Member] | U.S. Treasury Bills 0.037% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 8,124,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSevenPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
Total short-term U.S. government and Value | 8,123,377 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSevenPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | [4]
ProShares Ultra Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 294,501,633 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.041% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 16,066,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
Total short-term U.S. government and Value | 16,065,900 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueAprilSixteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.064% Due 05/14/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 27,423,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixFourPercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
Total short-term U.S. government and Value | 27,422,180 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixFourPercentageDueMayFourteenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.090% Due 06/11/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 43,631,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroNineZeroPercentageDueJuneElevenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total short-term U.S. government and Value | 43,629,281 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroNineZeroPercentageDueJuneElevenTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 6,604,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total short-term U.S. government and Value | 6,603,761 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.039% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 39,592,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeNinePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
Total short-term U.S. government and Value | 39,583,896 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeNinePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.078% Due 06/04/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,277,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenEightPercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
Total short-term U.S. government and Value | 4,276,848 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSevenEightPercentageDueJuneFourTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.004% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,723,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroFourPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total short-term U.S. government and Value | 5,722,801 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroZeroFourPercentageDueMayTwentyOneTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.015% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 849,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total short-term U.S. government and Value | 848,960 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.045% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,482,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total short-term U.S. government and Value | 5,481,822 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourFivePercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.038% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 45,162,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
Total short-term U.S. government and Value | 45,158,536 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeEightPercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.020% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 7,015,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoZeroPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total short-term U.S. government and Value | 7,014,277 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroTwoZeroPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.035% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 4,248,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total short-term U.S. government and Value | 4,247,533 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Silver [Member] | U.S. Treasury Bills 0.066% Due 08/06/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 88,463,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixSixPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
Total short-term U.S. government and Value | 88,445,838 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroSixSixPercentageDueAugustSixTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | [4]
ProShares Ultra Australian Dollar [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 2,201,920 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
ProShares Ultra Australian Dollar [Member] | U.S. Treasury Bills 0.040% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 2,202,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Total short-term U.S. government and Value | 2,201,920 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourZeroPercentageDueAprilThirtyTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
ProShares Ultra Euro [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 15,242,869 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.036% Due 04/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 242,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total short-term U.S. government and Value | 241,999 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueAprilSixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.016% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,575,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total short-term U.S. government and Value | 1,574,949 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneSixPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.036% Due 07/16/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,656,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total short-term U.S. government and Value | 1,655,829 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeSixPercentageDueJulySixteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.015% Due 06/25/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,129,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total short-term U.S. government and Value | 1,128,973 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueJuneTwentyFiveTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.015% Due 05/28/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,743,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total short-term U.S. government and Value | 1,742,917 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneFivePercentageDueMayTwentyEightTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.034% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 911,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFourPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | [5]
Total short-term U.S. government and Value | 910,967 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFourPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | [5]
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.035% Due 05/21/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,000,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total short-term U.S. government and Value | 999,965 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFivePercentageDueMayTwentyOneTwoThousandFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.041% Due 07/02/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 1,136,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | [5]
Total short-term U.S. government and Value | 1,135,913 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourOnePercentageDueJulyTwoTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | [5]
ProShares Ultra Euro [Member] | U.S. Treasury Bills 0.034% Due 07/23/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 5,852,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFourPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | [5]
Total short-term U.S. government and Value | 5,851,357 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroThreeFourPercentageDueJulyTwentyThreeTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | [5]
ProShares Ultra Yen [Member] |  |
Schedule of Investments [Line Items] |  |
Total short-term U.S. government and Value | 5,210,191 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.043% Due 08/13/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 3,694,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | [5]
Total short-term U.S. government and Value | 3,693,244 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourThreePercentageDueAugustThirteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | [5]
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.010% Due 06/18/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 586,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneZeroPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | [5]
Total short-term U.S. government and Value | 585,981 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroOneZeroPercentageDueJuneEighteenTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | [5]
ProShares Ultra Yen [Member] | U.S. Treasury Bills 0.047% Due 04/30/15 [Member] |  |
Schedule of Investments [Line Items] |  |
Principal Amount | 931,000 us-gaap_InvestmentOwnedBalancePrincipalAmount / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | [5]
Total short-term U.S. government and Value | $ 930,966 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_InvestmentTypeAxis = ck0001415311_UsTreasuryBillsZeroPointZeroFourSevenPercentageDueAprilThirtyTwoThousandAndFifteenMember / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | [5]
[1] | All or partial amount pledged as collateral for futures contracts.
[2] | All or partial amount pledged as collateral for swap agreements.
[3] | All or partial amount pledged as collateral for swap agreements and/or futures contracts.
[4] | All or partial amount pledged as collateral for forward agreements and/or futures contracts.
[5] | All or partial amount segregated as collateral for foreign currency forward contracts.

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