v2.4.1.9

Statements of Financial Condition (USD $) | Mar. 31, 2015 | Dec. 31, 2014
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ProShares Managed Futures Strategy [Member] |  |  |  |
Assets |  |  |  |
Cash | $ 8,302,902 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember | [1] | $ 6,135,185 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember | [1]
Segregated cash balances with brokers for futures contracts | 269,253 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 195,142 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Receivable on open futures contracts | 37,013 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 17,445 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Offering costs | 33,164 ck0001415311_OfferingCosts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 49,384 ck0001415311_OfferingCosts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Limitation by Sponsor | 11,008 ck0001415311_LimitationBySponsor / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 9,474 ck0001415311_LimitationBySponsor / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Total assets | 8,653,340 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 6,406,630 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Liabilities |  |  |  |
Payable for offering costs | 65,785 ck0001415311_PayableForOfferingCosts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 65,785 ck0001415311_PayableForOfferingCosts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Total liabilities | 65,785 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 65,785 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 8,587,555 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 6,340,845 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Total liabilities and shareholders' equity | 8,653,340 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 6,406,630 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Shares outstanding | 400,010 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 300,010 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Net asset value per share | $ 21.4684 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | $ 21.1354 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
Market value per share | $ 21.50 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | $ 21.28 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |
ProShares VIX Short-Term Futures ETF [Member] |  |  |  |
Assets |  |  |  |
Cash | 2,165,472 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 1,694,791 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Segregated cash balances with brokers for futures contracts | 11,020,165 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 18,439,750 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Short-term U.S. government and agency obligations | 131,184,020 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 82,088,299 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Receivable on open futures contracts | 5,219,208 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 9,317,236 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total assets | 149,588,865 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 111,540,076 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Liabilities |  |  |  |
Management fee payable | 101,356 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 80,751 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total liabilities | 101,356 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 80,751 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 149,487,509 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 111,459,325 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Total liabilities and shareholders' equity | 149,588,865 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 111,540,076 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Shares outstanding | 8,749,812 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | 5,324,812 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Net asset value per share | $ 17.0847 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | $ 20.9321 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
Market value per share | $ 17.01 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |  | $ 20.99 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember |
ProShares VIX Mid-Term Futures ETF [Member] |  |  |  |
Assets |  |  |  |
Cash | 1,303,894 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 1,634,082 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Segregated cash balances with brokers for futures contracts | 2,134,050 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 1,906,950 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Short-term U.S. government and agency obligations | 27,675,412 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 24,105,906 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Receivable on open futures contracts | 321,319 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 1,783,328 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total assets | 31,434,675 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 29,430,266 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Liabilities |  |  |  |
Payable for capital shares redeemed | 3,034,067 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 7,947,955 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Management fee payable | 21,578 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 22,736 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total liabilities | 3,055,645 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 7,970,691 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 28,379,030 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 21,459,575 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Total liabilities and shareholders' equity | 31,434,675 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 29,430,266 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Shares outstanding | 462,404 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | 337,404 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Net asset value per share | $ 61.3728 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | $ 63.6020 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
Market value per share | $ 61.09 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |  | $ 63.89 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember |
ProShares Short VIX Short-Term Futures ETF [Member] |  |  |  |
Assets |  |  |  |
Cash | 4,143,193 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 9,122,219 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Segregated cash balances with brokers for futures contracts | 55,500,260 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 85,244,950 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Short-term U.S. government and agency obligations | 222,919,943 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 446,975,220 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total assets | 282,563,396 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 541,342,389 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Liabilities |  |  |  |
Payable for capital shares redeemed |  |  | 3,358,781 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Payable on open futures contracts | 1,425,781 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 31,020,019 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Management fee payable | 286,643 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 407,465 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total liabilities | 1,712,424 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 34,786,265 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 280,850,972 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 506,556,124 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Total liabilities and shareholders' equity | 282,563,396 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 541,342,389 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Shares outstanding | 4,150,040 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | 8,250,040 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Net asset value per share | $ 67.6743 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | $ 61.4004 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
Market value per share | $ 68.04 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |  | $ 61.16 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember |
ProShares Ultra VIX Short-Term Futures ETF [Member] |  |  |  |
Assets |  |  |  |
Cash | 5,478,753 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 3,737,292 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Segregated cash balances with brokers for futures contracts | 73,653,370 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 116,907,700 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Short-term U.S. government and agency obligations | 569,900,064 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 182,639,188 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Receivable from capital shares sold | 7,900,647 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 12,549,248 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Receivable on open futures contracts | 37,350,672 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 42,531,441 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total assets | 694,283,506 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 358,364,869 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Liabilities |  |  |  |
Payable for capital shares redeemed |  |  | 6,272,056 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Management fee payable | 563,422 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 302,860 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total liabilities | 563,422 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 6,574,916 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 693,720,084 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 351,789,953 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Total liabilities and shareholders' equity | 694,283,506 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 358,364,869 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Shares outstanding | 45,670,099 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 14,020,099 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Net asset value per share | $ 15.1898 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | $ 25.0918 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
Market value per share | $ 15.05 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | $ 25.15 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |
ProShares UltraShort Bloomberg Commodity [Member] |  |  |  |
Assets |  |  |  |
Cash | 555,463 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 467,766 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Short-term U.S. government and agency obligations | 4,990,827 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 4,233,548 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Unrealized appreciation on swap agreements | 276,625 us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 567,259 us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Total assets | 5,822,915 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 5,268,573 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Liabilities |  |  |  |
Management fee payable | 4,552 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 3,867 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Total liabilities | 4,552 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 3,867 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 5,818,363 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 5,264,706 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Total liabilities and shareholders' equity | 5,822,915 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 5,268,573 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Shares outstanding | 59,997 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | 59,997 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Net asset value per share | $ 96.9776 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | $ 87.7495 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
Market value per share | $ 98.25 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |  | $ 87.44 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember |
ProShares UltraShort Bloomberg Crude Oil [Member] |  |  |  |
Assets |  |  |  |
Cash | 6,869,907 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 994,268 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Segregated cash balances with brokers for futures contracts | 20,594,295 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 12,292,665 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Short-term U.S. government and agency obligations | 319,733,997 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 131,594,608 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Unrealized appreciation on swap agreements | 26,857,473 us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 27,018,077 us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Receivable on open futures contracts | 4,822,119 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 1,293,531 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Total assets | 378,877,791 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 173,193,149 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Liabilities |  |  |  |
Payable for capital shares redeemed | 8,302,977 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 3,854,654 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Management fee payable | 237,809 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 128,385 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Total liabilities | 8,540,786 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 3,983,039 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 370,337,005 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 169,210,110 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Total liabilities and shareholders' equity | 378,877,791 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 173,193,149 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Shares outstanding | 4,269,944 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | 2,169,944 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Net asset value per share | $ 86.7311 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | $ 77.9790 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
Market value per share | $ 87.14 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |  | $ 76.52 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember |
ProShares UltraShort Bloomberg Natural Gas [Member] |  |  |  |
Assets |  |  |  |
Cash | 258,382 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 696,743 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Segregated cash balances with brokers for futures contracts | 1,708,036 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 4,405,830 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Short-term U.S. government and agency obligations | 8,979,498 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 8,672,710 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Receivable on open futures contracts |  |  | 923,531 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total assets | 10,945,916 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 14,698,814 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Liabilities |  |  |  |
Payable on open futures contracts | 5,985 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  |  |
Management fee payable | 8,361 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 10,250 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total liabilities | 14,346 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 10,250 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 10,931,570 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 14,688,564 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Total liabilities and shareholders' equity | 10,945,916 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 14,698,814 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Shares outstanding | 124,952 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | 174,952 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Net asset value per share | $ 87.4862 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | $ 83.9577 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
Market value per share | $ 87.54 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |  | $ 82.03 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember |
ProShares UltraShort Gold [Member] |  |  |  |
Assets |  |  |  |
Cash | 164,117 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 162,434 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Segregated cash balances with brokers for futures contracts | 8,800 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 8,800 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Short-term U.S. government and agency obligations | 79,438,219 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 84,040,107 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Receivable on open futures contracts | 392 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 3,260 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total assets | 79,611,528 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 84,214,601 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Liabilities |  |  |  |
Management fee payable | 68,833 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 70,061 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Unrealized depreciation on forward agreements | 1,582,081 ck0001415311_UnrealizedDepreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 2,282,778 ck0001415311_UnrealizedDepreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total liabilities | 1,650,914 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 2,352,839 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 77,960,614 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 81,861,762 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Total liabilities and shareholders' equity | 79,611,528 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 84,214,601 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Shares outstanding | 796,978 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | 846,978 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Net asset value per share | $ 97.8203 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | $ 96.6516 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
Market value per share | $ 98.18 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |  | $ 100.22 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember |
ProShares UltraShort Silver [Member] |  |  |  |
Assets |  |  |  |
Cash | 145,419 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 207,506 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Segregated cash balances with brokers for futures contracts | 16,940 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 14,300 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Short-term U.S. government and agency obligations | 50,001,670 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 52,226,692 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Unrealized appreciation on forward agreements |  |  | 799,523 ck0001415311_UnrealizedAppreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Receivable from capital shares sold | 10,118,943 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  |  |
Receivable on open futures contracts | 760 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 6,770 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Total assets | 60,283,732 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 53,254,791 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Liabilities |  |  |  |
Management fee payable | 43,050 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 42,354 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Unrealized depreciation on forward agreements | 3,736,183 ck0001415311_UnrealizedDepreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 204,570 ck0001415311_UnrealizedDepreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Total liabilities | 3,779,233 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 246,924 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 56,504,499 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 53,007,867 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Total liabilities and shareholders' equity | 60,283,732 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 53,254,791 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Shares outstanding | 558,489 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | 458,489 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Net asset value per share | $ 101.1739 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | $ 115.6143 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
Market value per share | $ 100.85 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | $ 119.39 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |
ProShares Short Euro [Member] |  |  |  |
Assets |  |  |  |
Cash | 1,534,250 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 1,640,225 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Segregated cash balances with brokers for futures contracts | 511,500 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 242,880 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Short-term U.S. government and agency obligations | 18,012,179 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 12,086,577 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Receivable on open futures contracts | 141,325 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 63,250 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total assets | 20,199,254 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 14,032,932 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Liabilities |  |  |  |
Management fee payable | 15,251 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 11,128 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total liabilities | 15,251 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 11,128 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 20,184,003 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 14,021,804 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Total liabilities and shareholders' equity | 20,199,254 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 14,032,932 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Shares outstanding | 450,005 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | 350,005 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Net asset value per share | $ 44.8528 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | $ 40.0617 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
Market value per share | $ 44.87 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |  | $ 40.03 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember |
ProShares UltraShort Australian Dollar [Member] |  |  |  |
Assets |  |  |  |
Cash | 2,623,624 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 1,788,757 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Segregated cash balances with brokers for futures contracts | 382,125 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 1,020,217 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Short-term U.S. government and agency obligations | 16,932,493 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 20,267,679 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Receivable on open futures contracts | 182,288 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 62,534 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Total assets | 20,120,530 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 23,139,187 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Liabilities |  |  |  |
Management fee payable | 15,595 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 18,397 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Total liabilities | 15,595 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 18,397 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 20,104,935 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 23,120,790 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Total liabilities and shareholders' equity | 20,120,530 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 23,139,187 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Shares outstanding | 350,005 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | 450,005 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Net asset value per share | $ 57.4419 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | $ 51.3790 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
Market value per share | $ 57.34 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |  | $ 51.37 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember |
ProShares UltraShort Euro [Member] |  |  |  |
Assets |  |  |  |
Cash | 275,163 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 746,454 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Short-term U.S. government and agency obligations | 549,451,431 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 487,111,117 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Unrealized appreciation on foreign currency forward contracts | 25,478,862 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 19,019,765 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Receivable from capital shares sold | 47,160,400 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 12,956,604 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Total assets | 622,365,856 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 519,833,940 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Liabilities |  |  |  |
Management fee payable | 437,633 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 385,820 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Unrealized depreciation on foreign currency forward contracts | 2,088,667 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 2,256,771 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Total liabilities | 2,526,300 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 2,642,591 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 619,839,556 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 517,191,349 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Total liabilities and shareholders' equity | 622,365,856 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 519,833,940 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Shares outstanding | 23,000,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | 23,950,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Net asset value per share | $ 26.9495 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | $ 21.5946 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
Market value per share | $ 26.95 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |  | $ 21.61 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember |
ProShares UltraShort Yen [Member] |  |  |  |
Assets |  |  |  |
Cash | 446,091 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 532,706 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Short-term U.S. government and agency obligations | 444,090,783 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 532,957,746 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Unrealized appreciation on foreign currency forward contracts | 725,490 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 571,149 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Total assets | 445,262,364 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 534,061,601 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Liabilities |  |  |  |
Payable for capital shares redeemed | 4,448,693 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  |  |
Management fee payable | 393,931 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 439,804 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Unrealized depreciation on foreign currency forward contracts | 57,733 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 2,149,924 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Total liabilities | 4,900,357 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 2,589,728 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 440,362,007 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 531,471,873 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Total liabilities and shareholders' equity | 445,262,364 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 534,061,601 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Shares outstanding | 4,949,294 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 5,949,294 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Net asset value per share | $ 88.9747 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | $ 89.3336 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
Market value per share | $ 88.91 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | $ 89.30 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |
ProShares Ultra Bloomberg Commodity [Member] |  |  |  |
Assets |  |  |  |
Cash | 171,443 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 185,684 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Short-term U.S. government and agency obligations | 2,242,809 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 2,754,900 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Total assets | 2,414,252 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 2,940,584 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Liabilities |  |  |  |
Management fee payable | 1,911 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 2,326 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Unrealized depreciation on swap agreements | 129,433 us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 331,338 us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Total liabilities | 131,344 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 333,664 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 2,282,908 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 2,606,920 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Total liabilities and shareholders' equity | 2,414,252 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 2,940,584 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Shares outstanding | 200,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | 200,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Net asset value per share | $ 11.4137 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | $ 13.0337 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
Market value per share | $ 11.70 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |  | $ 12.86 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember |
ProShares Ultra Bloomberg Crude Oil [Member] |  |  |  |
Assets |  |  |  |
Cash | 5,024,406 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 2,349,384 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Segregated cash balances with brokers for futures contracts | 13,420,311 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 34,605,120 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Short-term U.S. government and agency obligations | 1,066,114,169 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 467,200,736 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Receivable from capital shares sold | 18,414,719 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 28,726,173 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Total assets | 1,102,973,605 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 532,881,413 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Liabilities |  |  |  |
Payable for capital shares redeemed | 5,037,901 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  |  |
Payable on open futures contracts | 14,040,754 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 5,817,266 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Management fee payable | 789,703 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 320,062 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Unrealized depreciation on swap agreements | 78,474,219 us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 76,181,097 us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Total liabilities | 98,342,577 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 82,318,425 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 1,004,631,028 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 450,562,988 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Total liabilities and shareholders' equity | 1,102,973,605 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 532,881,413 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Shares outstanding | 147,199,170 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | 44,399,170 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Net asset value per share | $ 6.8250 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | $ 10.1480 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
Market value per share | $ 6.79 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |  | $ 10.37 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember |
ProShares Ultra Bloomberg Natural Gas [Member] |  |  |  |
Assets |  |  |  |
Cash | 513,008 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 1,653,582 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Segregated cash balances with brokers for futures contracts | 3,842,480 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 21,134,080 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Short-term U.S. government and agency obligations | 57,169,841 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 53,410,227 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Receivable from capital shares sold |  |  | 3,853,422 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total assets | 61,525,329 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 80,051,311 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Liabilities |  |  |  |
Payable on open futures contracts | 164,188 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 9,552,314 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Management fee payable | 54,848 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 65,790 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total liabilities | 219,036 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 9,618,104 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 61,306,293 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 70,433,207 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Total liabilities and shareholders' equity | 61,525,329 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 80,051,311 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Shares outstanding | 5,369,941 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | 4,569,941 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Net asset value per share | $ 11.4166 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | $ 15.4123 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
Market value per share | $ 11.39 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |  | $ 15.78 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember |
ProShares Ultra Gold [Member] |  |  |  |
Assets |  |  |  |
Cash | 122,188 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 104,145 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Segregated cash balances with brokers for futures contracts | 8,800 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 8,800 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Short-term U.S. government and agency obligations | 94,234,586 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 101,927,857 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Unrealized appreciation on forward agreements | 1,660,968 ck0001415311_UnrealizedAppreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 2,051,154 ck0001415311_UnrealizedAppreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Total assets | 96,026,542 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 104,091,956 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Liabilities |  |  |  |
Payable for capital shares redeemed |  |  | 1,999,718 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Payable on open futures contracts | 420 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 3,260 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Management fee payable | 76,662 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 85,633 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Total liabilities | 77,082 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 2,088,611 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 95,949,460 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 102,003,345 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Total liabilities and shareholders' equity | 96,026,542 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 104,091,956 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Shares outstanding | 2,500,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | 2,550,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Net asset value per share | $ 38.3796 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | $ 40.0011 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
Market value per share | $ 38.14 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |  | $ 38.41 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember |
ProShares Ultra Silver [Member] |  |  |  |
Assets |  |  |  |
Cash | 289,618 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 305,004 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Segregated cash balances with brokers for futures contracts | 16,940 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 14,300 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Short-term U.S. government and agency obligations | 294,501,633 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 305,474,211 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Unrealized appreciation on forward agreements | 22,620,868 ck0001415311_UnrealizedAppreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  |  |
Total assets | 317,429,059 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 305,793,515 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Liabilities |  |  |  |
Payable for capital shares redeemed |  |  | 1,967,832 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Payable on open futures contracts | 760 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 6,770 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Management fee payable | 245,442 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 254,050 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Unrealized depreciation on forward agreements |  |  | 12,395,120 ck0001415311_UnrealizedDepreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total liabilities | 246,202 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 14,623,772 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 317,182,857 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 291,169,743 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Total liabilities and shareholders' equity | 317,429,059 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 305,793,515 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Shares outstanding | 7,646,533 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 7,396,533 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Net asset value per share | $ 41.4806 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | $ 39.3657 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
Market value per share | $ 41.69 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | $ 38.05 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |
ProShares Ultra Australian Dollar [Member] |  |  |  |
Assets |  |  |  |
Cash | 66,124 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 222,968 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Segregated cash balances with brokers for futures contracts | 152,460 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 120,131 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Short-term U.S. government and agency obligations | 2,201,920 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 2,405,685 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Total assets | 2,420,504 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 2,748,784 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Liabilities |  |  |  |
Payable on open futures contracts | 21,232 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 6,369 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Management fee payable | 1,996 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 2,248 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Total liabilities | 23,228 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 8,617 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 2,397,276 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 2,740,167 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Total liabilities and shareholders' equity | 2,420,504 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 2,748,784 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Shares outstanding | 100,005 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | 100,005 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Net asset value per share | $ 23.9716 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | $ 27.4003 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
Market value per share | $ 24.20 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |  | $ 27.43 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember |
ProShares Ultra Euro [Member] |  |  |  |
Assets |  |  |  |
Cash | 311,421 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 671,117 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Short-term U.S. government and agency obligations | 15,242,869 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 2,415,698 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Unrealized appreciation on foreign currency forward contracts | 2,045 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 2,921 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total assets | 15,556,335 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 3,089,736 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Liabilities |  |  |  |
Management fee payable | 9,764 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 2,003 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Unrealized depreciation on foreign currency forward contracts | 780,795 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 106,292 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total liabilities | 790,559 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 108,295 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 14,765,776 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 2,981,441 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Total liabilities and shareholders' equity | 15,556,335 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 3,089,736 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Shares outstanding | 950,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | 150,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Net asset value per share | $ 15.5427 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | $ 19.8744 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
Market value per share | $ 15.54 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |  | $ 19.80 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember |
ProShares Ultra Yen [Member] |  |  |  |
Assets |  |  |  |
Cash | 435,727 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 846,919 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Short-term U.S. government and agency obligations | 5,210,191 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 1,287,869 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Unrealized appreciation on foreign currency forward contracts |  |  | 404 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Total assets | 5,645,918 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 2,135,192 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Liabilities |  |  |  |
Management fee payable | 4,659 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 1,515 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Unrealized depreciation on foreign currency forward contracts | 41,178 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 15,649 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Total liabilities | 45,837 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 17,164 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 5,600,081 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 2,118,028 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Total liabilities and shareholders' equity | 5,645,918 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 2,135,192 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Shares outstanding | 400,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | 150,014 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Net asset value per share | $ 13.9997 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | $ 14.1189 ck0001415311_NetAssetValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
Market value per share | $ 13.99 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |  | $ 14.12 ck0001415311_MarketValuePerShare / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember |
ProShares Trust II [Member] |  |  |  |
Assets |  |  |  |
Cash | 41,200,565 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 35,899,231 us-gaap_Cash / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Segregated cash balances with brokers for futures contracts | 183,239,785 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 296,561,615 ck0001415311_SegregatedCashBalancesWithBrokersForFuturesContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Short-term U.S. government and agency obligations | 3,980,228,554 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 3,005,876,580 us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Unrealized appreciation on swap agreements | 27,134,098 us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 27,585,336 us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Unrealized appreciation on forward agreements | 24,281,836 ck0001415311_UnrealizedAppreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 2,850,677 ck0001415311_UnrealizedAppreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Unrealized appreciation on foreign currency forward contracts | 26,206,397 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 19,594,239 ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Receivable from capital shares sold | 83,594,709 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 58,085,447 ck0001415311_ReceivableForCapitalSharesSold / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Receivable on open futures contracts | 48,075,096 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 56,002,326 us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Offering costs | 33,164 ck0001415311_OfferingCosts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 49,384 ck0001415311_OfferingCosts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Limitation by Sponsor | 11,008 ck0001415311_LimitationBySponsor / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 9,474 ck0001415311_LimitationBySponsor / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Total assets | 4,414,005,212 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 3,502,514,309 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Liabilities |  |  |  |
Payable for capital shares redeemed | 20,823,638 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 25,400,996 ck0001415311_PayableForCapitalSharesRedeemed / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Payable on open futures contracts | 15,659,120 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 46,405,998 us-gaap_PayablesToBrokerDealersAndClearingOrganizations / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Management fee payable | 3,382,999 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 2,657,505 us-gaap_ManagementFeePayable / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Payable for offering costs | 65,785 ck0001415311_PayableForOfferingCosts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 65,785 ck0001415311_PayableForOfferingCosts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Unrealized depreciation on swap agreements | 78,603,652 us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 76,512,435 us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Unrealized depreciation on forward agreements | 5,318,264 ck0001415311_UnrealizedDepreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 14,882,468 ck0001415311_UnrealizedDepreciationOnForwardAgreements / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Unrealized depreciation on foreign currency forward contracts | 2,968,373 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 4,528,636 ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContracts / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Total liabilities | 126,821,831 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 170,453,823 us-gaap_Liabilities / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Commitments and Contingencies |  |  |  |
Shareholders' equity |  |  |  |
Shareholders' equity | 4,287,183,381 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 3,332,060,486 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Total liabilities and shareholders' equity | $ 4,414,005,212 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | $ 3,502,514,309 us-gaap_LiabilitiesAndStockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
Shares outstanding | 258,357,748 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |  | 122,157,748 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember |
[1] | Since the Fund commenced investment operations on October 1, 2014, the Statement of Cash Flows for the three months ended March 31, 2014 has not been provided.

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