Schedule of Investments - Short-Term U.S. Government and Agency Obligations (Parenthetical) (Detail) - U.S. Government Agencies Short-term Debt Securities [Member] - USD ($)	3 Months Ended
Mar. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Total short-term U.S. government and agency obligations, cost	$ 1,101,228,826	$ 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	47.00%
Total short-term U.S. government and agency obligations, cost	$ 148,766,040	109,391,681
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.365% due 04/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.365%
Investment, maturity date	Apr. 18, 2024
Discount rate at the time of purchase	true
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.269% due 06/06/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.269%
Investment, maturity date	Jun. 06, 2024
Discount rate at the time of purchase	true
ProShares Short VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.352% due 06/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.352%
Investment, maturity date	Jun. 18, 2024
Discount rate at the time of purchase	true
ProShares Short VIX Short-Term Futures ETF [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]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	51.00%
Total short-term U.S. government and agency obligations, cost	$ 301,987,549	233,435,026
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.365% due 04/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.365%
Investment, maturity date	Apr. 18, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.273% due 05/14/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.273%
Investment, maturity date	May 14, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.269% due 06/06/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.269%
Investment, maturity date	Jun. 06, 2024
Discount rate at the time of purchase	true
ProShares Ultra Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.352% due 06/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.352%
Investment, maturity date	Jun. 18, 2024
Discount rate at the time of purchase	true
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 Gold [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	64.00%
Total short-term U.S. government and agency obligations, cost	$ 138,592,669	59,496,177
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.365% due 04/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.365%
Investment, maturity date	Apr. 18, 2024
Discount rate at the time of purchase	true
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.273% due 05/14/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.273%
Investment, maturity date	May 14, 2024
Discount rate at the time of purchase	true
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.269% due 06/06/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.269%
Investment, maturity date	Jun. 06, 2024
Discount rate at the time of purchase	true
ProShares Ultra Gold [Member] \| U.S. Treasury Bills 5.390% due 06/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.39%
Investment, maturity date	Jun. 18, 2024
Discount rate at the time of purchase	true
ProShares Ultra Gold [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 Silver [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	51.00%
Total short-term U.S. government and agency obligations, cost	$ 205,091,268	114,255,151
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.365% due 04/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.365%
Investment, maturity date	Apr. 18, 2024
Discount rate at the time of purchase	true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.273% due 05/14/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.273%
Investment, maturity date	May 14, 2024
Discount rate at the time of purchase	true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.269% due 06/06/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.269%
Investment, maturity date	Jun. 06, 2024
Discount rate at the time of purchase	true
ProShares Ultra Silver [Member] \| U.S. Treasury Bills 5.352% due 06/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.352%
Investment, maturity date	Jun. 18, 2024
Discount rate at the time of purchase	true
ProShares Ultra Silver [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 VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	21.00%
Total short-term U.S. government and agency obligations, cost	$ 59,312,431	0
ProShares Ultra VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.269% due 06/06/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.269%
Investment, maturity date	Jun. 06, 2024
Discount rate at the time of purchase	true
ProShares Ultra VIX Short-Term Futures ETF [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 UltraShort Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	63.00%
Total short-term U.S. government and agency obligations, cost	$ 123,822,272	49,673,923
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.365% due 04/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.365%
Investment, maturity date	Apr. 18, 2024
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.273% due 05/14/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.273%
Investment, maturity date	May 14, 2024
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.269% due 06/06/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.269%
Investment, maturity date	Jun. 06, 2024
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Crude Oil [Member] \| U.S. Treasury Bills 5.352% due 06/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.352%
Investment, maturity date	Jun. 18, 2024
Discount rate at the time of purchase	true
ProShares UltraShort 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 UltraShort Bloomberg Natural Gas [Member]
Schedule of Investments [Line Items]
Short-term U.S. government and agency obligations percentage of shareholders' equity	58.00%
Total short-term U.S. government and agency obligations, cost	$ 54,451,445	0
ProShares UltraShort Bloomberg Natural Gas [Member] \| U.S. Treasury Bills 5.273% due 05/14/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.273%
Investment, maturity date	May 14, 2024
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Natural Gas [Member] \| U.S. Treasury Bills 5.269% due 06/06/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.269%
Investment, maturity date	Jun. 06, 2024
Discount rate at the time of purchase	true
ProShares UltraShort Bloomberg Natural Gas [Member] \| U.S. Treasury Bills 5.390% due 06/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.39%
Investment, maturity date	Jun. 18, 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	42.00%
Total short-term U.S. government and agency obligations, cost	$ 69,205,152	$ 59,648,776
ProShares VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.269% due 06/06/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.269%
Investment, maturity date	Jun. 06, 2024
Discount rate at the time of purchase	true
ProShares VIX Short-Term Futures ETF [Member] \| U.S. Treasury Bills 5.352% due 06/18/24 [Member]
Schedule of Investments [Line Items]
Interest rate	5.352%
Investment, maturity date	Jun. 18, 2024
Discount rate at the time of purchase	true
ProShares VIX Short-Term Futures ETF [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