Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) - U.S. Government Agencies Short-term Debt Securities [Member] - USD ($)	6 Months Ended
Jun. 30, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, cost	$ 1,566,271,392	$ 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	57.00%
Total short-term U.S. government and agency obligations, cost	$ 169,045,239	109,391,681
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.288% due 07/09/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.288%
Investment, maturity date	Jul. 09, 2024
Discount rate at the time of purchase	true
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.321% due 09/05/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.321%
Investment, maturity date	Sep. 05, 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	74.00%
Total short-term U.S. government and agency obligations, cost	$ 387,837,316	233,435,026
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.349% due 07/09/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.349%
Investment, maturity date	Jul. 09, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.310% due 09/05/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.31%
Investment, maturity date	Sep. 05, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.311% due 08/08/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.311%
Investment, maturity date	Aug. 08, 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	90.00%
Total short-term U.S. government and agency obligations, cost	$ 194,011,855	59,496,177
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.309% due 07/09/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.309%
Investment, maturity date	Jul. 09, 2024
Discount rate at the time of purchase	true
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.311% due 08/08/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.311%
Investment, maturity date	Aug. 08, 2024
Discount rate at the time of purchase	true
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.315% due 09/05/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.315%
Investment, maturity date	Sep. 05, 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	80.00%
Total short-term U.S. government and agency obligations, cost	$ 457,266,168	114,255,151
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.290% due 07/09/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.29%
Investment, maturity date	Jul. 09, 2024
Discount rate at the time of purchase	true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.311% due 08/08/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.311%
Investment, maturity date	Aug. 08, 2024
Discount rate at the time of purchase	true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.326% due 09/05/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.326%
Investment, maturity date	Sep. 05, 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	22.00%
Total short-term U.S. government and agency obligations, cost	$ 49,941,817	0
ProShares Ultra VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.304% due 07/09/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.304%
Investment, maturity date	Jul. 09, 2024
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	59.00%
Total short-term U.S. government and agency obligations, cost	$ 104,415,710	49,673,923
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.304% due 07/09/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.304%
Investment, maturity date	Jul. 09, 2024
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.327% due 09/05/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.327%
Investment, maturity date	Sep. 05, 2024
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	61.00%
Total short-term U.S. government and agency obligations, cost	$ 89,476,486	0
ProShares UltraShort Bloomberg Natural Gas [Member] \| U.S. Treasury Bills 5.260% due 07/09/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.26%
Investment, maturity date	Jul. 09, 2024
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Natural Gas [Member] \| U.S. Treasury Bills 5.354% due 09/05/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.354%
Investment, maturity date	Sep. 05, 2024
Discount rate at the time of purchase	true
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	148.00%
Total short-term U.S. government and agency obligations, cost	$ 49,519,896	0
ProShares VIX Mid-Term Futures ETF [Member] \| U.S. Treasury Bills 5.295% due 09/05/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.295%
Investment, maturity date	Sep. 05, 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	44.00%
Total short-term U.S. government and agency obligations, cost	$ 64,756,905	$ 59,648,776
ProShares VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.300% due 07/09/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.30%
Investment, maturity date	Jul. 09, 2024
Discount rate at the time of purchase	true
ProShares VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.354% due 09/05/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.354%
Investment, maturity date	Sep. 05, 2024
Discount rate at the time of purchase	true