Investments - Offsetting of Financial Assets and Liabilities (Detail) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Swap Agreements [Member]
Derivative [Line Items]
Net Amounts of Assets presented in the Statements of Financial Condition	$ 5,719,272	$ 41,311,209
Net Amounts of Liabilities presented in the Statements of Financial Condition	11,197,394	54,867,040
Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Net Amounts of Assets presented in the Statements of Financial Condition	1,321,954	3,621,921
Net Amounts of Liabilities presented in the Statements of Financial Condition	2,155,362	4,618,937
ProShares Ultra Bloomberg Crude Oil [Member] \| Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	4,023,623	38,215,610
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	4,023,623	38,215,610
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	0	0
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	0	0
ProShares Ultra Euro [Member] \| Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	446,814	2,312
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	446,814	2,312
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	3,294	169,440
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	3,294	169,440
ProShares Ultra Gold [Member] \| Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	0	0
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	0	0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	4,726,020	2,348,132
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	4,726,020	2,348,132
ProShares Ultra Silver [Member] \| Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	0	0
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	0	0
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	6,471,374	52,518,908
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	6,471,374	52,518,908
ProShares Ultra Yen [Member] \| Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	764,251	146,194
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	764,251	146,194
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	27,879	4,361,491
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	27,879	4,361,491
ProShares UltraShort Euro [Member] \| Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	110,889	1,189,827
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	110,889	1,189,827
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	1,837,188	32,777
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	1,837,188	32,777
ProShares UltraShort Gold [Member] \| Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	1,407,997	141,581
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	1,407,997	141,581
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	0	0
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	0	0
ProShares UltraShort Silver [Member] \| Swap Agreements [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	287,652	2,954,018
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	287,652	2,954,018
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	0	0
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	0	0
ProShares UltraShort Yen [Member] \| Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts of Recognized Assets presented in the Statements of Financial Condition	0	2,283,588
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Assets presented in the Statements of Financial Condition	0	2,283,588
Gross Amounts of Recognized Liabilities presented in the Statements of Financial Condition	287,001	55,229
Gross Amounts Offset in the Statements of Financial Condition	0	0
Net Amounts of Liabilities presented in the Statements of Financial Condition	$ 287,001	$ 55,229

ProShares Trust II 10-Q