Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) - U.S. Government Agencies Short-term Debt Securities [Member] - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, cost	$ 473,690,268	$ 690,346,244
ProShares Short VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	9.00%	41.00%
Total short-term U.S. government and agency obligations, cost	$ 24,931,067	$ 109,391,681
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 4.562% due 01/23/25 [Member]
Schedule of Investments [Line Items]
Interest rate	4.562%
Investment, maturity date	Jan. 23, 2025
Discount rate at the time of purchase	true
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.442% due 01/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.442%
Investment, maturity date		Jan. 18, 2024
Discount rate at the time of purchase		true
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.345% due 02/01/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.345%
Investment, maturity date		Feb. 01, 2024
Discount rate at the time of purchase		true
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.417% due 02/20/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.417%
Investment, maturity date		Feb. 20, 2024
Discount rate at the time of purchase		true
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.382% due 03/12/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.382%
Investment, maturity date		Mar. 12, 2024
Discount rate at the time of purchase		true
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	19.00%	36.00%
Total short-term U.S. government and agency obligations, cost	$ 99,724,267	$ 233,435,026
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 4.562% due 01/23/25 [Member]
Schedule of Investments [Line Items]
Interest rate	4.562%
Investment, maturity date	Jan. 23, 2025
Discount rate at the time of purchase		true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.442% due 01/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.442%
Investment, maturity date		Jan. 18, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.345% due 02/01/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.345%
Investment, maturity date		Feb. 01, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.417% due 02/20/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.417%
Investment, maturity date		Feb. 20, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.382% due 03/12/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.382%
Investment, maturity date		Mar. 12, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Natural Gas [Member]
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	$ 99,724,267	$ 64,445,510
ProShares Ultra Bloomberg Natural Gas [Member] \| U.S. Treasury Bills 4.562% due 01/23/25 [Member]
Schedule of Investments [Line Items]
Interest rate	4.562%
Investment, maturity date	Jan. 23, 2025
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Natural Gas [Member] \| U.S. Treasury Bills 5.417% due 02/20/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.417%
Investment, maturity date		Feb. 20, 2024
Discount rate at the time of purchase		true
ProShares Ultra Bloomberg Natural Gas [Member] \| U.S. Treasury Bills 5.382% due 03/12/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.382%
Investment, maturity date		Mar. 12, 2024
Discount rate at the time of purchase		true
ProShares Ultra Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	26.00%	31.00%
Total short-term U.S. government and agency obligations, cost	$ 74,793,200	$ 59,496,177
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 4.562% due 01/23/25 [Member]
Schedule of Investments [Line Items]
Interest rate	4.562%
Investment, maturity date	Jan. 23, 2025
Discount rate at the time of purchase	true
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.345% due 02/01/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.345%
Investment, maturity date		Feb. 01, 2024
Discount rate at the time of purchase		true
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.417% due 02/20/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.417%
Investment, maturity date		Feb. 20, 2024
Discount rate at the time of purchase		true
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.382% due 03/12/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.382%
Investment, maturity date		Mar. 12, 2024
Discount rate at the time of purchase		true
ProShares Ultra Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	22.00%	29.00%
Total short-term U.S. government and agency obligations, cost	$ 124,655,333	$ 114,255,151
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 4.562% due 01/23/25 [Member]
Schedule of Investments [Line Items]
Interest rate	4.562%
Investment, maturity date	Jan. 23, 2025
Discount rate at the time of purchase	true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.442% due 01/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.442%
Investment, maturity date		Jan. 18, 2024
Discount rate at the time of purchase		true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.345% due 02/01/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.345%
Investment, maturity date		Feb. 01, 2024
Discount rate at the time of purchase		true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.417% due 02/20/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.417%
Investment, maturity date		Feb. 20, 2024
Discount rate at the time of purchase		true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.382% due 03/12/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.382%
Investment, maturity date		Mar. 12, 2024
Discount rate at the time of purchase		true
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	9.00%
Total short-term U.S. government and agency obligations, cost	$ 24,931,067	$ 0
ProShares Ultra VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 4.562% due 01/23/25 [Member]
Schedule of Investments [Line Items]
Interest rate	4.562%
Investment, maturity date	Jan. 23, 2025
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity		26.00%
Total short-term U.S. government and agency obligations, cost	$ 0	$ 49,673,923
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.442% due 01/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.442%
Investment, maturity date		Jan. 18, 2024
Discount rate at the time of purchase		true
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.417% due 02/20/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.417%
Investment, maturity date		Feb. 20, 2024
Discount rate at the time of purchase		true
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.382% due 03/12/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.382%
Investment, maturity date		Mar. 12, 2024
Discount rate at the time of purchase		true
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	19.00%	38.00%
Total short-term U.S. government and agency obligations, cost	$ 24,931,067	$ 59,648,776
ProShares VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 4.562% due 01/23/25 [Member]
Schedule of Investments [Line Items]
Interest rate	4.562%
Investment, maturity date	Jan. 23, 2025
Discount rate at the time of purchase	true
ProShares VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.442% due 01/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.442%
Investment, maturity date		Jan. 18, 2024
Discount rate at the time of purchase		true
ProShares VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.417% due 02/20/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.417%
Investment, maturity date		Feb. 20, 2024
Discount rate at the time of purchase		true
ProShares VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.382% due 03/12/24 [Member]
Schedule of Investments [Line Items]
Interest rate		5.382%
Investment, maturity date		Mar. 12, 2024
Discount rate at the time of purchase		true

ProShares Trust II 10-K