v3.25.2
Significant Accounting Policies - Valuation of Investments using Fair Value Hierarchy (Detail) - USD ($)
Jun. 30, 2025
Dec. 31, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure $ 276,210,164 $ 526,273,030
ProShares Short VIX Short-Term Futures ETF [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 10,392,342 21,929,124
ProShares Ultra Bloomberg Crude Oil [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 57,265,716 148,831,195
ProShares Ultra Bloomberg Natural Gas [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (9,783,882) 196,990,701
ProShares Ultra Euro [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 443,520 (167,128)
ProShares Ultra Gold [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 66,757,686 72,042,085
ProShares Ultra Silver [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 104,305,127 43,266,932
ProShares Ultra VIX Short-Term Futures ETF [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (40,388,899) 38,913,867
ProShares Ultra Yen [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 736,372 (4,215,297)
ProShares UltraShort Bloomberg Crude Oil [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 15,855,988 (1,655,392)
ProShares UltraShort Bloomberg Natural Gas [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 80,194,093 (26,130,504)
ProShares UltraShort Euro [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (1,726,299) 1,157,050
ProShares UltraShort Gold [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 1,870,449 262,637
ProShares UltraShort Silver [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 905,332 3,465,933
ProShares UltraShort Yen [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (287,001) 2,228,359
ProShares VIX Mid-Term Futures ETF [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (188,667) 22,266
ProShares VIX Short-Term Futures ETF [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (10,141,713) 29,331,202
Level I - Quoted Prices [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 319,752,668 473,819,625
Level I - Quoted Prices [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] (37,230,974) 67,006,252
Level I - Quoted Prices [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 0 24,937,875
Level I - Quoted Prices [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] 10,392,342 (3,008,751)
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 49,959,555 99,751,500
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] 3,282,538 10,864,085
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 19,983,822 99,751,500
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] (29,767,704) 97,239,201
Level I - Quoted Prices [Member] | ProShares Ultra Gold [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 74,939,332 74,813,625
Level I - Quoted Prices [Member] | ProShares Ultra Gold [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] (3,455,626) (423,408)
Level I - Quoted Prices [Member] | ProShares Ultra Silver [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 119,914,448 124,689,375
Level I - Quoted Prices [Member] | ProShares Ultra Silver [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] (9,137,947) (28,903,535)
Level I - Quoted Prices [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 14,987,867 24,937,875
Level I - Quoted Prices [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] (55,376,766) 13,975,992
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 0  
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] 15,855,988 (1,655,392)
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 39,967,644  
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] 40,226,449 (26,130,504)
Level I - Quoted Prices [Member] | ProShares UltraShort Gold [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] 462,452 121,056
Level I - Quoted Prices [Member] | ProShares UltraShort Silver [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] 617,680 511,915
Level I - Quoted Prices [Member] | ProShares VIX Mid-Term Futures ETF [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] (188,667) 22,266
Level I - Quoted Prices [Member] | ProShares VIX Short-Term Futures ETF [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 0 24,937,875
Level I - Quoted Prices [Member] | ProShares VIX Short-Term Futures ETF [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] (10,141,713) 4,393,327
Level II - Other Significant Observable Inputs [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (833,408) (997,016)
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (5,478,122) (13,555,831)
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 4,023,623 38,215,610
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 443,520 (167,128)
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Gold [Member] | Swap Agreements [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (4,726,020) (2,348,132)
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Silver [Member] | Swap Agreements [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (6,471,374) (52,518,908)
Level II - Other Significant Observable Inputs [Member] | ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 736,372 (4,215,297)
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (1,726,299) 1,157,050
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Gold [Member] | Swap Agreements [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 1,407,997 141,581
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Silver [Member] | Swap Agreements [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 287,652 2,954,018
Level II - Other Significant Observable Inputs [Member] | ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure $ (287,001) $ 2,228,359
[1] Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures.