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Investments - Offsetting of Financial Assets and Liabilities (Detail) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Swap Agreements [Member]    
Derivative [Line Items]    
Net Amounts of Assets presented in the Statements of Financial Condition $ 342,589,713 $ 41,311,209
Net Amounts of Liabilities presented in the Statements of Financial Condition 18,039,464 54,867,040
Foreign Currency Forward Contracts [Member]    
Derivative [Line Items]    
Net Amounts of Assets presented in the Statements of Financial Condition 1,026,581 3,621,921
Net Amounts of Liabilities presented in the Statements of Financial Condition 1,694,678 4,618,937
ProShares Ultra Bloomberg Crude Oil [Member] | Swap Agreements [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 0 38,215,610
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 0 38,215,610
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 11,151,121 0
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition 11,151,121 0
ProShares Ultra Euro [Member] | Foreign Currency Forward Contracts [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 62,719 2,312
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 62,719 2,312
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 29 169,440
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition 29 169,440
ProShares Ultra Gold [Member] | Swap Agreements [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 28,676,455 0
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 28,676,455 0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 0 2,348,132
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition 0 2,348,132
ProShares Ultra Silver [Member] | Swap Agreements [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 313,913,258 0
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 313,913,258 0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 0 52,518,908
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition 0 52,518,908
ProShares Ultra Yen [Member] | Foreign Currency Forward Contracts [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 1,161 146,194
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 1,161 146,194
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 1,183,809 4,361,491
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition 1,183,809 4,361,491
ProShares UltraShort Euro [Member] | Foreign Currency Forward Contracts [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 7,632 1,189,827
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 7,632 1,189,827
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 400,006 32,777
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition 400,006 32,777
ProShares UltraShort Gold [Member] | Swap Agreements [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 0 141,581
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 0 141,581
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 2,568,196 0
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition 2,568,196 0
ProShares UltraShort Silver [Member] | Swap Agreements [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 0 2,954,018
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 0 2,954,018
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 4,320,147 0
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition 4,320,147 0
ProShares UltraShort Yen [Member] | Foreign Currency Forward Contracts [Member]    
Derivative [Line Items]    
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition 955,069 2,283,588
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Assets presented in the Statements of Financial Condition 955,069 2,283,588
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition 110,834 55,229
Gross Amounts Offset in the Statements of Financial Condition 0 0
Net Amounts of Liabilities presented in the Statements of Financial Condition $ 110,834 $ 55,229