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Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Detail) - U.S. Government Agencies Short-term Debt Securities [Member] - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value $ 2,259,034,978 $ 473,819,625
ProShares Short VIX Short-Term Futures ETF [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 59,907,798 24,937,875
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.986% due 01/06/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 35,000,000  
Short-term U.S. government and agency obligations, value [1] 34,986,465  
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 25,000,000  
Short-term U.S. government and agency obligations, value [1] 24,921,333  
ProShares Short VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 4.562% due 01/23/25 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1]   25,000,000
Short-term U.S. government and agency obligations, value [1]   24,937,875
ProShares Ultra Bloomberg Crude Oil [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 149,575,489 99,751,500
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 3.986% due 01/06/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 20,000,000  
Short-term U.S. government and agency obligations, value [1] 19,992,266  
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 3.913% due 01/13/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 20,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 19,978,428  
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 50,000,000  
Short-term U.S. government and agency obligations, value [1] 49,842,665  
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 3.666% due 02/10/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 30,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 29,884,788  
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 3.868% due 02/12/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 30,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 29,877,342  
ProShares Ultra Bloomberg Crude Oil [Member] | U.S. Treasury Bills 4.562% due 01/23/25 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2]   100,000,000
Short-term U.S. government and agency obligations, value [1],[2]   99,751,500
ProShares Ultra Bloomberg Natural Gas [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 234,273,034 99,751,500
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 3.986% due 01/06/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 25,000,000  
Short-term U.S. government and agency obligations, value [1] 24,990,332  
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 3.913% due 01/13/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 35,000,000  
Short-term U.S. government and agency obligations, value [1] 34,962,249  
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 25,000,000  
Short-term U.S. government and agency obligations, value [1] 24,921,333  
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 3.666% due 02/10/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 50,000,000  
Short-term U.S. government and agency obligations, value [1] 49,807,980  
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 3.868% due 02/12/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 100,000,000  
Short-term U.S. government and agency obligations, value [1] 99,591,140  
ProShares Ultra Bloomberg Natural Gas [Member] | U.S. Treasury Bills 4.562% due 01/23/25 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1]   100,000,000
Short-term U.S. government and agency obligations, value [1]   99,751,500
ProShares Ultra Gold [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 548,706,159 74,813,625
ProShares Ultra Gold [Member] | U.S. Treasury Bills 3.986% due 01/06/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 175,000,000  
Short-term U.S. government and agency obligations, value [1] 174,932,328  
ProShares Ultra Gold [Member] | U.S. Treasury Bills 3.913% due 01/13/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 60,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 59,935,284  
ProShares Ultra Gold [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 100,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 99,685,330  
ProShares Ultra Gold [Member] | U.S. Treasury Bills 3.666% due 02/10/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 130,000,000  
Short-term U.S. government and agency obligations, value [1] 129,500,748  
ProShares Ultra Gold [Member] | U.S. Treasury Bills 3.868% due 02/12/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 85,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 84,652,469  
ProShares Ultra Gold [Member] | U.S. Treasury Bills 4.562% due 01/23/25 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2]   75,000,000
Short-term U.S. government and agency obligations, value [1],[2]   74,813,625
ProShares Ultra Silver [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 967,310,974 124,689,375
ProShares Ultra Silver [Member] | U.S. Treasury Bills 3.986% due 01/06/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 150,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 149,941,995  
ProShares Ultra Silver [Member] | U.S. Treasury Bills 3.913% due 01/13/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 80,000,000  
Short-term U.S. government and agency obligations, value [1] 79,913,712  
ProShares Ultra Silver [Member] | U.S. Treasury Bills 3.871% due 01/27/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 150,000,000  
Short-term U.S. government and agency obligations, value [1] 149,630,730  
ProShares Ultra Silver [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 175,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 174,449,328  
ProShares Ultra Silver [Member] | U.S. Treasury Bills 3.666% due 02/10/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 290,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 288,886,284  
ProShares Ultra Silver [Member] | U.S. Treasury Bills 3.868% due 02/12/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2] 125,000,000  
Short-term U.S. government and agency obligations, value [1],[2] 124,488,925  
ProShares Ultra Silver [Member] | U.S. Treasury Bills 4.562% due 01/23/25 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1],[2]   125,000,000
Short-term U.S. government and agency obligations, value [1],[2]   124,689,375
ProShares Ultra VIX Short-Term Futures ETF [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 99,775,566 24,937,875
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.986% due 01/06/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 15,000,000  
Short-term U.S. government and agency obligations, value [1] 14,994,199  
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.913% due 01/13/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 35,000,000  
Short-term U.S. government and agency obligations, value [1] 34,962,249  
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 25,000,000  
Short-term U.S. government and agency obligations, value [1] 24,921,333  
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.868% due 02/12/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 25,000,000  
Short-term U.S. government and agency obligations, value [1] 24,897,785  
ProShares Ultra VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 4.562% due 01/23/25 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1]   25,000,000
Short-term U.S. government and agency obligations, value [1]   24,937,875
ProShares UltraShort Bloomberg Crude Oil [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 44,913,599 0
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 3.986% due 01/06/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 20,000,000  
Short-term U.S. government and agency obligations, value [1] 19,992,266  
ProShares UltraShort Bloomberg Crude Oil [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 25,000,000  
Short-term U.S. government and agency obligations, value [1] 24,921,333  
ProShares UltraShort Bloomberg Natural Gas [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 69,821,093 0
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 3.913% due 01/13/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 20,000,000  
Short-term U.S. government and agency obligations, value [1] 19,978,428  
ProShares UltraShort Bloomberg Natural Gas [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 50,000,000  
Short-term U.S. government and agency obligations, value [1] 49,842,665  
ProShares VIX Short-Term Futures ETF [Member]    
Schedule of Investments [Line Items]    
Short-term U.S. government and agency obligations, value 84,751,266 24,937,875
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.913% due 01/13/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 25,000,000  
Short-term U.S. government and agency obligations, value [1] 24,973,035  
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.699% due 02/03/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 25,000,000  
Short-term U.S. government and agency obligations, value [1] 24,921,332  
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 3.868% due 02/12/26 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1] 35,000,000  
Short-term U.S. government and agency obligations, value [1] $ 34,856,899  
ProShares VIX Short-Term Futures ETF [Member] | U.S. Treasury Bills 4.562% due 01/23/25 [Member]    
Schedule of Investments [Line Items]    
Principal Amount [1]   25,000,000
Short-term U.S. government and agency obligations, value [1]   $ 24,937,875
[1] Rates shown represent discount rate at the time of purchase.
[2] All or partial amount pledged as collateral for swap agreements.