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]

Beginning balance at Dec. 31, 2014

$ 6,340,845us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesManagedFuturesStrategyMember

$ 111,459,325us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesVixShortTermFuturesEtfMember

$ 21,459,575us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesVixMidTermFuturesEtfMember

$ 506,556,124us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesShortVixShortTermFuturesEtfMember

$ 351,789,953us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember

$ 5,264,706us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergCommodityMember

$ 169,210,110us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergCrudeOilMember

$ 14,688,564us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergNaturalGasMember

$ 81,861,762us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortGoldMember

$ 53,007,867us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortSilverMember

$ 14,021,804us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesShortEuroMember

$ 23,120,790us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortAustralianDollarMember

$ 517,191,349us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortEuroMember

$ 531,471,873us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortYenMember

$ 2,606,920us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergCommodityMember

$ 450,562,988us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergCrudeOilMember

$ 70,433,207us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergNaturalGasMember

$ 102,003,345us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraGoldMember

$ 291,169,743us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraSilverMember

$ 2,740,167us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraAustralianDollarMember

$ 2,981,441us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraEuroMember

$ 2,118,028us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraYenMember

$ 3,332,060,486us-gaap_StockholdersEquity
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesTrustIiMember

Addition of shares

4,304,676us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesManagedFuturesStrategyMember

84,542,261us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesVixShortTermFuturesEtfMember

12,344,563us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesVixMidTermFuturesEtfMember

118,885,967us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesShortVixShortTermFuturesEtfMember

966,149,726us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember

372,664,934us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergCrudeOilMember

10,858,377us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergNaturalGasMember

8,523,330us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortGoldMember

25,115,676us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortSilverMember

4,418,831us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesShortEuroMember

2,764,167us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortAustralianDollarMember

148,238,393us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortEuroMember

58,116,062us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortYenMember

1,023,327,847us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergCrudeOilMember

27,576,652us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergNaturalGasMember

2,093,762us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraGoldMember

28,733,984us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraSilverMember

13,540,570us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraEuroMember

4,285,016us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraYenMember

2,916,484,794us-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

2,164,573ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesManagedFuturesStrategyMember

58,650,707ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesVixShortTermFuturesEtfMember

7,616,727ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesVixMidTermFuturesEtfMember

(271,391,865)ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesShortVixShortTermFuturesEtfMember

567,579,832ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember

155,663,960ck0001415311_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

9,306,049ck0001415311_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

749,232,323ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergCrudeOilMember

9,461,510ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergNaturalGasMember

(2,451,921)ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraGoldMember

9,462,168ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraSilverMember

3,597,896ck0001415311_NetAdditionRedemptionOfShares
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraYenMember

1,201,642,303ck0001415311_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)

119,252us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesManagedFuturesStrategyMember

^[1]

(8,976,176)us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesVixShortTermFuturesEtfMember

127,909us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesVixMidTermFuturesEtfMember

23,834,554us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesShortVixShortTermFuturesEtfMember

(135,089,154)us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember

856,549us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergCommodityMember

44,657,756us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergCrudeOilMember

5,179,716us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergNaturalGasMember

1,917,930us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortGoldMember

(1,361,863)us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortSilverMember

2,057,094us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesShortEuroMember

2,979,889us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortAustralianDollarMember

107,528,339us-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

23,344,651us-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

1,432,787us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergCrudeOilMember

(3,081,900)us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortBloombergNaturalGasMember

697,941us-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

6,631,469us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortEuroMember

2,237,926us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltrashortYenMember

201,952us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergCommodityMember

(19,680,648)us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergCrudeOilMember

27,450,969us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraBloombergNaturalGasMember

(388,373)us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraGoldMember

35,015,135us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraSilverMember

39,399us-gaap_UnrealizedGainLossOnInvestments
/ us-gaap_StatementBusinessSegmentsAxis
= ck0001415311_ProsharesUltraAustralianDollarMember

(675,335)us-gaap_UnrealizedGainLossOnInvestments
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(26,127)us-gaap_UnrealizedGainLossOnInvestments
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(32,684,488)us-gaap_UnrealizedGainLossOnInvestments
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Net income (loss)

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^[1],[2]

(20,622,523)us-gaap_NetIncomeLoss
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(697,272)us-gaap_NetIncomeLoss
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45,686,713us-gaap_NetIncomeLoss
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(225,649,701)us-gaap_NetIncomeLoss
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553,657us-gaap_NetIncomeLoss
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45,462,935us-gaap_NetIncomeLoss
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2,056,229us-gaap_NetIncomeLoss
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2,430,175us-gaap_NetIncomeLoss
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1,743,368us-gaap_NetIncomeLoss
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2,600,653us-gaap_NetIncomeLoss
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112,970,253us-gaap_NetIncomeLoss
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(3,983,909)us-gaap_NetIncomeLoss
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(324,012)us-gaap_NetIncomeLoss
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(195,164,283)us-gaap_NetIncomeLoss
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(18,588,424)us-gaap_NetIncomeLoss
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(3,601,964)us-gaap_NetIncomeLoss
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16,550,946us-gaap_NetIncomeLoss
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$ 20,104,935us-gaap_StockholdersEquity
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$ 619,839,556us-gaap_StockholdersEquity
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$ 440,362,007us-gaap_StockholdersEquity
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$ 2,282,908us-gaap_StockholdersEquity
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$ 1,004,631,028us-gaap_StockholdersEquity
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$ 95,949,460us-gaap_StockholdersEquity
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$ 317,182,857us-gaap_StockholdersEquity
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$ 14,765,776us-gaap_StockholdersEquity
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$ 5,600,081us-gaap_StockholdersEquity
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[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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