v3.26.1
Significant Accounting Policies - Valuation of Investments using Fair Value Hierarchy (Detail) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure $ 3,336,354,416 $ 2,895,530,209
ProShares Short VIX Short-Term Futures ETF [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 131,621,982 75,607,395
ProShares Ultra Bloomberg Crude Oil [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 239,736,679 134,735,261
ProShares Ultra Bloomberg Natural Gas [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 204,586,818 102,176,162
ProShares Ultra Euro [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 1,868,384 62,690
ProShares Ultra Gold [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 502,650,648 614,680,893
ProShares Ultra Silver [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 1,035,630,423 1,700,469,631
ProShares Ultra VIX Short-Term Futures ETF [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 17,142,383 43,700,404
ProShares Ultra Yen [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 17,036,060 (1,182,648)
ProShares UltraShort Bloomberg Crude Oil [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 864,181,953 56,938,717
ProShares UltraShort Bloomberg Natural Gas [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 45,609,121 123,764,630
ProShares UltraShort Euro [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 20,875,697 (392,374)
ProShares UltraShort Gold [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 87,793,913 (3,423,243)
ProShares UltraShort Silver [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 80,410,898 (13,598,998)
ProShares UltraShort Yen [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 17,883,256 844,235
ProShares VIX Mid-Term Futures ETF [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 21,371,161 (2,035,549)
ProShares VIX Short-Term Futures ETF [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 47,955,040 63,183,003
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 2,133,460,710 2,259,034,978
Level I - Quoted Prices [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 1,258,857,300  
Level I - Quoted Prices [Member] | Futures Contracts [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure [1] 172,418,709 312,613,079
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 44,645,753 59,907,798
Level I - Quoted Prices [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 75,045,000  
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] 11,931,229 15,699,597
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 248,639,306 149,575,489
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 70,049,000  
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] (3,645,927) (3,689,107)
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 99,638,000 234,273,034
Level I - Quoted Prices [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 100,070,000  
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] 4,878,818 (132,096,872)
Level I - Quoted Prices [Member] | ProShares Ultra Euro [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 1,994,224  
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 398,489,670 548,706,159
Level I - Quoted Prices [Member] | ProShares Ultra Gold [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 180,126,000  
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] (43,082,533) 37,298,279
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 939,739,692 967,310,974
Level I - Quoted Prices [Member] | ProShares Ultra Silver [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 280,196,000  
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] (55,109,618) 419,245,399
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   99,775,566
Level I - Quoted Prices [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 50,030,000  
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] (32,887,617) (56,075,162)
Level I - Quoted Prices [Member] | ProShares Ultra Yen [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 6,979,785  
Level I - Quoted Prices [Member] | ProShares Ultra Yen [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 11,006,600  
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 278,944,830 44,913,599
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 300,210,000  
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] 285,027,123 12,025,118
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 0 69,821,093
Level I - Quoted Prices [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 45,031,500  
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] 577,621 53,943,537
Level I - Quoted Prices [Member] | ProShares UltraShort Euro [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 9,971,121  
Level I - Quoted Prices [Member] | ProShares UltraShort Euro [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 10,006,000  
Level I - Quoted Prices [Member] | ProShares UltraShort Gold [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 39,855,200  
Level I - Quoted Prices [Member] | ProShares UltraShort Gold [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 30,021,000  
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] 14,999,402 (855,047)
Level I - Quoted Prices [Member] | ProShares UltraShort Silver [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 44,628,208  
Level I - Quoted Prices [Member] | ProShares UltraShort Silver [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 20,014,000  
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] 10,415,810 (9,278,851)
Level I - Quoted Prices [Member] | ProShares UltraShort Yen [Member] | Short-Term U.S. Government and Agencies [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 9,971,121  
Level I - Quoted Prices [Member] | ProShares UltraShort Yen [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 7,004,200  
Level I - Quoted Prices [Member] | ProShares VIX Mid-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 9,963,800  
Level I - Quoted Prices [Member] | ProShares VIX Mid-Term Futures ETF [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 15,009,000  
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] (3,601,639) (2,035,549)
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 84,751,266
Level I - Quoted Prices [Member] | ProShares VIX Short-Term Futures ETF [Member] | Exchange Traded Fund [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure 65,039,000  
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] (17,083,960) (21,568,263)
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 730,346 (668,097)
Level II - Other Significant Observable Inputs [Member] | Swap Agreements [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Investments, fair value disclosure (229,112,649) 324,550,249
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 (75,305,700) (11,151,121)
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 (125,840) 62,690
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 (32,882,489) 28,676,455
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 (129,195,651) 313,913,258
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 (950,325) (1,182,648)
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 898,576 (392,374)
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 2,918,311 (2,568,196)
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 5,352,880 (4,320,147)
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 $ 907,935 $ 844,235
[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.