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Schedule of Investments - Futures Contracts Sold (Detail) - Futures Contracts [Member] - Contracts to Sell [Member]
Dec. 31, 2025
USD ($)
Contract
Dec. 31, 2024
USD ($)
Contract
ProShares Short VIX Short-Term Futures ETF [Member]    
Schedule of Investments [Line Items]    
Unrealized Appreciation (Depreciation)/Value $ 15,699,597 $ (3,008,751)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - Cboe, expires January 2025 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract   4,447
Notional Amount at Value   $ 77,901,212
Unrealized Appreciation (Depreciation)/Value   $ (3,491,718)
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - Cboe, expires February 2025 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract   3,080
Notional Amount at Value   $ 55,042,064
Unrealized Appreciation (Depreciation)/Value   482,967
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - Cboe, expires January 2026 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract 3,791  
Notional Amount at Value $ 62,674,708  
Unrealized Appreciation (Depreciation)/Value $ 14,546,344  
ProShares Short VIX Short-Term Futures ETF [Member] | VIX Futures - Cboe, expires February 2026 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract 3,153  
Notional Amount at Value $ 58,437,702  
Unrealized Appreciation (Depreciation)/Value 1,153,253  
ProShares UltraShort Bloomberg Crude Oil [Member]    
Schedule of Investments [Line Items]    
Unrealized Appreciation (Depreciation)/Value $ 12,025,118 $ (1,655,392)
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires March 2025 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract   1,140
Notional Amount at Value   $ 81,225,000
Unrealized Appreciation (Depreciation)/Value   $ (2,847,040)
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires June 2025 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract   1,167
Notional Amount at Value   $ 81,888,390
Unrealized Appreciation (Depreciation)/Value   $ 1,888,681
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires December 2025 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract   1,186
Notional Amount at Value   $ 80,873,340
Unrealized Appreciation (Depreciation)/Value   $ (697,033)
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires March 2026 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract 1,035  
Notional Amount at Value $ 59,222,700  
Unrealized Appreciation (Depreciation)/Value $ 1,030,474  
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires June 2026 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract 1,048  
Notional Amount at Value $ 59,746,480  
Unrealized Appreciation (Depreciation)/Value $ 6,670,215  
ProShares UltraShort Bloomberg Crude Oil [Member] | WTI Crude Oil - NYMEX, expires December 2026 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract 1,053  
Notional Amount at Value $ 59,936,760  
Unrealized Appreciation (Depreciation)/Value $ 4,324,429  
ProShares UltraShort Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, expires March 2026 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract 9,225  
Notional Amount at Value $ 288,742,500  
Unrealized Appreciation (Depreciation)/Value $ 53,943,537  
ProShares UltraShort Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, expires March 2025 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract   16,846
Notional Amount at Value   $ 521,889,080
Unrealized Appreciation (Depreciation)/Value   $ (26,130,504)
ProShares UltraShort Gold [Member] | Gold Futures - COMEX, expires February 2025 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract   48
Notional Amount at Value   $ 12,676,800
Unrealized Appreciation (Depreciation)/Value   $ 121,056
ProShares UltraShort Gold [Member] | Gold Futures - COMEX, expires February 2026 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract 168  
Notional Amount at Value $ 72,930,480  
Unrealized Appreciation (Depreciation)/Value $ (855,047)  
ProShares UltraShort Silver [Member] | Silver Futures - COMEX, expires March 2025 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract   72
Notional Amount at Value   $ 10,527,120
Unrealized Appreciation (Depreciation)/Value   $ 511,915
ProShares UltraShort Silver [Member] | Silver Futures - COMEX, expires March 2026 [Member]    
Schedule of Investments [Line Items]    
Number of Contracts | Contract 797  
Notional Amount at Value $ 281,352,955  
Unrealized Appreciation (Depreciation)/Value $ (9,278,851)