v3.26.1
Schedule of Investments - Foreign Currency Forward Contracts (Detail) - 6 months ended Jun. 30, 2026
USD ($)
EUR (€)
JPY (¥)
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 06, 2026    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member]      
Schedule of Investments [Line Items]      
Unrealized Appreciation (Depreciation)/Value [1] $ (126,257)    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member] | Goldman Sachs International [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Purchase [1] $ 4,064,844 € 3,554,921  
Unrealized Appreciation (Depreciation)/Value [1] $ (50,804)    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member] | UBS AG [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Purchase [1] $ 6,020,792 5,265,502  
Unrealized Appreciation (Depreciation)/Value [1] (75,453)    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member]      
Schedule of Investments [Line Items]      
Unrealized Appreciation (Depreciation)/Value [1] $ 417    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member] | Goldman Sachs International [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Sell [1] $ (92,619) (81,000)  
Unrealized Appreciation (Depreciation)/Value [1] $ 576    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member] | UBS AG [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Sell [1] $ (92,619) (81,000)  
Unrealized Appreciation (Depreciation)/Value [1] (159)    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member]      
Schedule of Investments [Line Items]      
Unrealized Appreciation (Depreciation)/Value [1] $ (958,033)    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member] | Goldman Sachs International [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Purchase [1] $ 30,648,621   ¥ 4,976,213,056
Unrealized Appreciation (Depreciation)/Value [1] $ (467,958)    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member] | UBS AG [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Purchase [1] $ 32,855,072   5,334,459,856
Unrealized Appreciation (Depreciation)/Value [1] (490,075)    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member]      
Schedule of Investments [Line Items]      
Unrealized Appreciation (Depreciation)/Value [1] $ 7,708    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member] | Goldman Sachs International [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Sell [1] $ (322,831)   (52,416,000)
Unrealized Appreciation (Depreciation)/Value [1] $ 2,467    
Foreign Currency Forward Contracts [Member] | ProShares Ultra Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member] | UBS AG [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Sell [1] $ (812,431)   (131,909,000)
Unrealized Appreciation (Depreciation)/Value [1] 5,241    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member]      
Schedule of Investments [Line Items]      
Unrealized Appreciation (Depreciation)/Value [1] $ (44,573)    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member] | Goldman Sachs International [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Purchase [1] $ 548,852 480,000  
Unrealized Appreciation (Depreciation)/Value [1] $ (7,908)    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Purchase [Member] | UBS AG [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Purchase [1] $ 8,049,828 7,040,000  
Unrealized Appreciation (Depreciation)/Value [1] (36,665)    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member]      
Schedule of Investments [Line Items]      
Unrealized Appreciation (Depreciation)/Value [1] $ 943,149    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member] | Goldman Sachs International [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Sell [1] $ (34,350,422) (30,041,263)  
Unrealized Appreciation (Depreciation)/Value [1] $ 401,712    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Euro [Member] | Euro Contract [Member] | Contracts to Sell [Member] | UBS AG [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Sell [1] $ (44,752,234) € (39,138,199)  
Unrealized Appreciation (Depreciation)/Value [1] 541,437    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member]      
Schedule of Investments [Line Items]      
Unrealized Appreciation (Depreciation)/Value [1] $ (5,836)    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Purchase [Member] | UBS AG [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Purchase [1] $ 304,625   49,460,000
Unrealized Appreciation (Depreciation)/Value [1] (5,836)    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member]      
Schedule of Investments [Line Items]      
Unrealized Appreciation (Depreciation)/Value [1] $ 913,771    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member] | Goldman Sachs International [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Sell [1] $ (31,078,281)   (5,045,974,165)
Unrealized Appreciation (Depreciation)/Value [1] $ 465,583    
Foreign Currency Forward Contracts [Member] | ProShares UltraShort Yen [Member] | Yen Contract [Member] | Contracts to Sell [Member] | UBS AG [Member]      
Schedule of Investments [Line Items]      
Settlement Date [1] Jul. 17, 2026    
Contract to Sell [1] $ (31,276,480)   ¥ (5,078,154,424)
Unrealized Appreciation (Depreciation)/Value [1] $ 448,188    
[1] The positions and counterparties herein are as of June 30, 2026. The Fund continually evaluates different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.