Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Short VIX Short-Term Futures ETF
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	25.00%	9.00%
Total short-term U.S. government and agency obligations, cost	$ 59,898,070	$ 24,931,067
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Short VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Short VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.986% due 01/06/26
Schedule of Investments [Line Items]
Interest rate	3.986%
Investment, maturity date	Jan. 06, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Short VIX Short-Term Futures ETF \| U.S. Treasury Bills 4.562% due 01/23/25
Schedule of Investments [Line Items]
Interest rate		4.562%
Investment, maturity date		Jan. 23, 2025
Discount rate at the time of purchase		true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Crude Oil
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	39.00%	19.00%
Total short-term U.S. government and agency obligations, cost	$ 149,544,793	$ 99,724,267
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Crude Oil \| U.S. Treasury Bills 3.666% due 02/10/26
Schedule of Investments [Line Items]
Interest rate	3.666%
Investment, maturity date	Feb. 10, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Crude Oil \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Crude Oil \| U.S. Treasury Bills 3.868% due 02/12/26
Schedule of Investments [Line Items]
Interest rate	3.868%
Investment, maturity date	Feb. 12, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Crude Oil \| U.S. Treasury Bills 3.913% due 01/13/26
Schedule of Investments [Line Items]
Interest rate	3.913%
Investment, maturity date	Jan. 13, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Crude Oil \| U.S. Treasury Bills 3.986% due 01/06/26
Schedule of Investments [Line Items]
Interest rate	3.986%
Investment, maturity date	Jan. 06, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Crude Oil \| U.S. Treasury Bills 4.562% due 01/23/25
Schedule of Investments [Line Items]
Interest rate		4.562%
Investment, maturity date		Jan. 23, 2025
Discount rate at the time of purchase		true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Natural Gas
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	44.00%	25.00%
Total short-term U.S. government and agency obligations, cost	$ 234,217,281	$ 99,724,267
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Natural Gas \| U.S. Treasury Bills 3.666% due 02/10/26
Schedule of Investments [Line Items]
Interest rate	3.666%
Investment, maturity date	Feb. 10, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Natural Gas \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Natural Gas \| U.S. Treasury Bills 3.868% due 02/12/26
Schedule of Investments [Line Items]
Interest rate	3.868%
Investment, maturity date	Feb. 12, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Natural Gas \| U.S. Treasury Bills 3.913% due 01/13/26
Schedule of Investments [Line Items]
Interest rate	3.913%
Investment, maturity date	Jan. 13, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Natural Gas \| U.S. Treasury Bills 3.986% due 01/06/26
Schedule of Investments [Line Items]
Interest rate	3.986%
Investment, maturity date	Jan. 06, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Bloomberg Natural Gas \| U.S. Treasury Bills 4.562% due 01/23/25
Schedule of Investments [Line Items]
Interest rate		4.562%
Investment, maturity date		Jan. 23, 2025
Discount rate at the time of purchase		true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Gold
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	54.00%	26.00%
Total short-term U.S. government and agency obligations, cost	$ 548,601,553	$ 74,793,200
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Gold \| U.S. Treasury Bills 3.666% due 02/10/26
Schedule of Investments [Line Items]
Interest rate	3.666%
Investment, maturity date	Feb. 10, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Gold \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Gold \| U.S. Treasury Bills 3.868% due 02/12/26
Schedule of Investments [Line Items]
Interest rate	3.868%
Investment, maturity date	Feb. 12, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Gold \| U.S. Treasury Bills 3.913% due 01/13/26
Schedule of Investments [Line Items]
Interest rate	3.913%
Investment, maturity date	Jan. 13, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Gold \| U.S. Treasury Bills 3.986% due 01/06/26
Schedule of Investments [Line Items]
Interest rate	3.986%
Investment, maturity date	Jan. 06, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Gold \| U.S. Treasury Bills 4.562% due 01/23/25
Schedule of Investments [Line Items]
Interest rate		4.562%
Investment, maturity date		Jan. 23, 2025
Discount rate at the time of purchase		true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Silver
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	43.00%	22.00%
Total short-term U.S. government and agency obligations, cost	$ 967,111,002	$ 124,655,333
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Silver \| U.S. Treasury Bills 3.666% due 02/10/26
Schedule of Investments [Line Items]
Interest rate	3.666%
Investment, maturity date	Feb. 10, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Silver \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Silver \| U.S. Treasury Bills 3.868% due 02/12/26
Schedule of Investments [Line Items]
Interest rate	3.868%
Investment, maturity date	Feb. 12, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Silver \| U.S. Treasury Bills 3.871% due 01/27/26
Schedule of Investments [Line Items]
Interest rate	3.871%
Investment, maturity date	Jan. 27, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Silver \| U.S. Treasury Bills 3.913% due 01/13/26
Schedule of Investments [Line Items]
Interest rate	3.913%
Investment, maturity date	Jan. 13, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Silver \| U.S. Treasury Bills 3.986% due 01/06/26
Schedule of Investments [Line Items]
Interest rate	3.986%
Investment, maturity date	Jan. 06, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra Silver \| U.S. Treasury Bills 4.562% due 01/23/25
Schedule of Investments [Line Items]
Interest rate		4.562%
Investment, maturity date		Jan. 23, 2025
Discount rate at the time of purchase		true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra VIX Short-Term Futures ETF
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	25.00%	9.00%
Total short-term U.S. government and agency obligations, cost	$ 99,753,597	$ 24,931,067
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.868% due 02/12/26
Schedule of Investments [Line Items]
Interest rate	3.868%
Investment, maturity date	Feb. 12, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.913% due 01/13/26
Schedule of Investments [Line Items]
Interest rate	3.913%
Investment, maturity date	Jan. 13, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.986% due 01/06/26
Schedule of Investments [Line Items]
Interest rate	3.986%
Investment, maturity date	Jan. 06, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares Ultra VIX Short-Term Futures ETF \| U.S. Treasury Bills 4.562% due 01/23/25
Schedule of Investments [Line Items]
Interest rate		4.562%
Investment, maturity date		Jan. 23, 2025
Discount rate at the time of purchase		true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares UltraShort Bloomberg Crude Oil
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	50.00%
Total short-term U.S. government and agency obligations, cost	$ 44,906,073
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares UltraShort Bloomberg Crude Oil \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares UltraShort Bloomberg Crude Oil \| U.S. Treasury Bills 3.986% due 01/06/26
Schedule of Investments [Line Items]
Interest rate	3.986%
Investment, maturity date	Jan. 06, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares UltraShort Bloomberg Natural Gas
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	48.00%
Total short-term U.S. government and agency obligations, cost	$ 69,807,867
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares UltraShort Bloomberg Natural Gas \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares UltraShort Bloomberg Natural Gas \| U.S. Treasury Bills 3.913% due 01/13/26
Schedule of Investments [Line Items]
Interest rate	3.913%
Investment, maturity date	Jan. 13, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares VIX Short-Term Futures ETF
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	37.00%	19.00%
Total short-term U.S. government and agency obligations, cost	$ 84,730,287	$ 24,931,067
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.699% due 02/03/26
Schedule of Investments [Line Items]
Interest rate	3.699%
Investment, maturity date	Feb. 03, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.868% due 02/12/26
Schedule of Investments [Line Items]
Interest rate	3.868%
Investment, maturity date	Feb. 12, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares VIX Short-Term Futures ETF \| U.S. Treasury Bills 3.913% due 01/13/26
Schedule of Investments [Line Items]
Interest rate	3.913%
Investment, maturity date	Jan. 13, 2026
Discount rate at the time of purchase	true
Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities \| ProShares VIX Short-Term Futures ETF \| U.S. Treasury Bills 4.562% due 01/23/25
Schedule of Investments [Line Items]
Interest rate		4.562%
Investment, maturity date		Jan. 23, 2025
Discount rate at the time of purchase		true

Investment, Identifier [Axis]: U.S. Government Agencies Short-term Debt Securities | ProShares Short VIX Short-Term Futures ETF