v2.4.1.9

Statements of Changes in Shareholders' Equity (USD $) | ProShares Managed Futures Strategy [Member] | ProShares VIX Short-Term Futures ETF [Member] | ProShares VIX Mid-Term Futures ETF [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | ProShares UltraShort Bloomberg Commodity [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | ProShares UltraShort Gold [Member] | ProShares UltraShort Silver [Member] | ProShares Short Euro [Member] | ProShares UltraShort Australian Dollar [Member] | ProShares UltraShort Euro [Member] | ProShares UltraShort Yen [Member] | ProShares Ultra Bloomberg Commodity [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | ProShares Ultra Gold [Member] | ProShares Ultra Silver [Member] | ProShares Ultra Australian Dollar [Member] | ProShares Ultra Euro [Member] | ProShares Ultra Yen [Member] | ProShares Trust II [Member]
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Beginning balance at Dec. 31, 2014 | $ 6,340,845 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | $ 111,459,325 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | $ 21,459,575 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | $ 506,556,124 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | $ 351,789,953 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | $ 5,264,706 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | $ 169,210,110 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | $ 14,688,564 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | $ 81,861,762 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | $ 53,007,867 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | $ 14,021,804 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember | $ 23,120,790 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | $ 517,191,349 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | $ 531,471,873 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | $ 2,606,920 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | $ 450,562,988 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | $ 70,433,207 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | $ 102,003,345 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | $ 291,169,743 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | $ 2,740,167 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember | $ 2,981,441 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | $ 2,118,028 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | $ 3,332,060,486 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
Addition of shares | 4,304,676 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 84,542,261 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | 12,344,563 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | 118,885,967 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | 966,149,726 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 372,664,934 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | 10,858,377 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | 8,523,330 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | 25,115,676 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | 4,418,831 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember | 2,764,167 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | 148,238,393 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | 58,116,062 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 1,023,327,847 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | 27,576,652 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | 2,093,762 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | 28,733,984 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  | 13,540,570 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | 4,285,016 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | 2,916,484,794 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
Redemption of shares | (2,140,103)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | (25,891,554)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | (4,727,836)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | (390,277,832)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | (398,569,894)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | (217,000,974)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | (16,671,600)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | (14,854,653)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | (15,809,627)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | (8,380,675)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | (158,560,439)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | (145,242,019)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | (274,095,524)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | (18,115,142)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | (4,545,683)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | (19,271,816)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  |  | (687,120)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | (1,714,842,491)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
Net addition (redemption) of shares | 2,164,573 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | 58,650,707 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | 7,616,727 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | (271,391,865)ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | 567,579,832 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember |  | 155,663,960 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | (5,813,223)ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | (6,331,323)ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | 9,306,049 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember |  | (5,616,508)ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | (10,322,046)ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | (87,125,957)ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember |  | 749,232,323 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | 9,461,510 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | (2,451,921)ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | 9,462,168 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember |  |  | 3,597,896 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | 1,201,642,303 ck0001415311_NetAdditionRedemptionOfShares / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
Net investment income (loss) | (16,021)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember | [1] | (274,472)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | (63,559)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | (1,492,492)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | (2,049,613)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | (12,318)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | (627,608)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | (41,587)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | (185,696)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | (118,220)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | (38,347)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember | (55,714)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | (1,189,555)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | (1,116,544)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | (5,519)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | (1,844,712)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | (206,884)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | (227,743)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | (699,839)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | (6,142)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember | (15,698)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | (9,090)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | (10,297,373)us-gaap_InvestmentIncomeNet / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
Net realized gain (loss) | 119,252 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember | [1] | (8,976,176)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | 127,909 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | 23,834,554 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | (135,089,154)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | 856,549 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | 44,657,756 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | 5,179,716 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | 1,917,930 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | (1,361,863)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | 2,057,094 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember | 2,979,889 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | 107,528,339 us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | (5,105,291)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | (520,445)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | (173,638,923)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | (45,832,509)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | (2,985,848)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | (17,764,350)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | (376,148)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember | (1,065,202)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | (80,626)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | (203,537,547)us-gaap_RealizedInvestmentGainsLosses / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
Change in net unrealized appreciation/depreciation | (21,094)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember | [1] | (11,371,875)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | (761,622)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | 23,344,651 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | (88,510,934)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | (290,574)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | 1,432,787 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | (3,081,900)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | 697,941 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | (4,329,334)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | (275,379)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember | (323,522)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | 6,631,469 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | 2,237,926 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | 201,952 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | (19,680,648)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | 27,450,969 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | (388,373)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | 35,015,135 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | 39,399 us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember | (675,335)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | (26,127)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | (32,684,488)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
Net income (loss) | 82,137 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember | [1],[2] | (20,622,523)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | (697,272)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | 45,686,713 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | (225,649,701)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | 553,657 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | 45,462,935 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | 2,056,229 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | 2,430,175 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | (5,809,417)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | 1,743,368 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember | 2,600,653 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | 112,970,253 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | (3,983,909)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | (324,012)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | (195,164,283)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | (18,588,424)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | (3,601,964)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | 16,550,946 us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | (342,891)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember | (1,756,235)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | (115,843)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | (246,519,408)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
Ending balance at Mar. 31, 2015 | $ 8,587,555 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesManagedFuturesStrategyMember |  | $ 149,487,509 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixShortTermFuturesEtfMember | $ 28,379,030 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesVixMidTermFuturesEtfMember | $ 280,850,972 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortVixShortTermFuturesEtfMember | $ 693,720,084 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember | $ 5,818,363 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCommodityMember | $ 370,337,005 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergCrudeOilMember | $ 10,931,570 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortBloombergNaturalGasMember | $ 77,960,614 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortGoldMember | $ 56,504,499 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortSilverMember | $ 20,184,003 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesShortEuroMember | $ 20,104,935 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortAustralianDollarMember | $ 619,839,556 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortEuroMember | $ 440,362,007 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltrashortYenMember | $ 2,282,908 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCommodityMember | $ 1,004,631,028 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergCrudeOilMember | $ 61,306,293 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraBloombergNaturalGasMember | $ 95,949,460 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraGoldMember | $ 317,182,857 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraSilverMember | $ 2,397,276 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraAustralianDollarMember | $ 14,765,776 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraEuroMember | $ 5,600,081 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesUltraYenMember | $ 4,287,183,381 us-gaap_StockholdersEquity / us-gaap_StatementBusinessSegmentsAxis = ck0001415311_ProsharesTrustIiMember
[1] | Since the Fund commenced investment operations on October 1, 2014, the Statement of Operations for the three months ended March 31, 2014 has not been provided.
[2] | 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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