v3.26.1
Schedule of Investments - Affiliated Investments (Detail) - USD ($)
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 1,258,857,300 $ 1,809,191,600 $ 0
Proshares Short VIX Short-Term Futures ETF [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 119,690,753    
Proshares Short VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 75,045,000   0
Proshares Short VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 750,000    
Investment Owned, Fair Value [1],[2] $ 75,045,000    
Proshares Ultra Bloomberg Crude Oil [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value [1] 318,688,306    
Proshares Ultra Bloomberg Crude Oil [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 70,049,000   0
Proshares Ultra Bloomberg Crude Oil [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 700,000    
Investment Owned, Fair Value [1],[2] $ 70,049,000    
Proshares Ultra Bloomberg Natural Gas [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 199,708,000    
Proshares Ultra Bloomberg Natural Gas [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 100,070,000   0
Proshares Ultra Bloomberg Natural Gas [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 1,000,000    
Investment Owned, Fair Value [1],[2] $ 100,070,000    
Proshares Ultra Gold [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 578,615,670    
Proshares Ultra Gold [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 180,126,000   0
Proshares Ultra Gold [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 1,800,000    
Investment Owned, Fair Value [1],[2] $ 180,126,000    
Proshares Ultra Silver [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 1,219,935,692    
Proshares Ultra Silver [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 280,196,000   0
Proshares Ultra Silver [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 2,800,000    
Investment Owned, Fair Value [1],[2] $ 280,196,000    
ProShares Ultra VIX Short-Term Futures ETF [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 50,030,000    
ProShares Ultra VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 50,030,000   0
ProShares Ultra VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 500,000    
Investment Owned, Fair Value [1],[2] $ 50,030,000    
Proshares Ultra Yen [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 17,986,385    
Proshares Ultra Yen [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 11,006,600   0
Proshares Ultra Yen [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 110,000    
Investment Owned, Fair Value [1],[2] $ 11,006,600    
Proshares Ultra Short Bloomberg Crude Oil [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value [1] 579,154,830    
Proshares Ultra Short Bloomberg Crude Oil [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 300,210,000   0
Proshares Ultra Short Bloomberg Crude Oil [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 3,000,000    
Investment Owned, Fair Value [1],[2] $ 300,210,000    
Proshares Ultra Short Bloomberg Natural Gas [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 45,031,500    
Proshares Ultra Short Bloomberg Natural Gas [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 45,031,500   0
Proshares Ultra Short Bloomberg Natural Gas [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 450,000    
Investment Owned, Fair Value [1],[2] $ 45,031,500    
Proshares Ultra Short Euro [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 19,977,121    
Proshares Ultra Short Euro [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 10,006,000   0
Proshares Ultra Short Euro [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 100,000    
Investment Owned, Fair Value [1],[2] $ 10,006,000    
Proshares UltraShort Gold [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 69,876,200    
Proshares UltraShort Gold [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 30,021,000   0
Proshares UltraShort Gold [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 300,000    
Investment Owned, Fair Value [1],[2] $ 30,021,000    
Proshares UltraShort Silver [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value [1] 64,642,208    
Proshares UltraShort Silver [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 20,014,000   0
Proshares UltraShort Silver [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 200,000    
Investment Owned, Fair Value [1],[2] $ 20,014,000    
Proshares Ultra Short Yen [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 16,975,321    
Proshares Ultra Short Yen [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 7,004,200   0
Proshares Ultra Short Yen [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 70,000    
Investment Owned, Fair Value [1],[2] $ 7,004,200    
Proshares VIX Mid-Term Futures ETF [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value 24,972,800    
Proshares VIX Mid-Term Futures ETF [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 15,009,000   0
Proshares VIX Mid-Term Futures ETF [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.52%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 150,000    
Investment Owned, Fair Value [1],[2] $ 15,009,000    
Proshares VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member]      
Schedule of Investments [Line Items]      
Investment Owned, Fair Value $ 65,039,000   $ 0
Proshares VIX Short-Term Futures ETF [Member] | Affiliated Investments [Member] | Exchange Traded Fund Proshares Genius Money Market ETF 3.54%      
Schedule of Investments [Line Items]      
Number of shares of affiliates investment held [1],[2] 650,000    
Investment Owned, Fair Value [1],[2] $ 65,039,000    
[1] Affiliated company as defined under the Investment Company Act of 1940.
[2] Represents 7-day effective yield as of June 30, 2026.