v3.22.2

Investments - Fair Value of Derivative Instruments (Detail) - Not Designated as Hedging Instrument [Member] - USD ($)		Jun. 30, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	$ 320,754,275	$ 311,946,820
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	448,442,911	179,187,406
VIX Futures Contracts [Member] | Payable on open futures contracts [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	5,677,140
VIX Futures Contracts [Member] | Payable on open futures contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	71,125
VIX Futures Contracts [Member] | Payable on open futures contracts [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	1,810,355
VIX Futures Contracts [Member] | Receivables on open futures contracts [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	1,517,614
VIX Futures Contracts [Member] | Receivables on open futures contracts [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	41,121,658
VIX Futures Contracts [Member] | Receivables on open futures contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	3,151,792
VIX Futures Contracts [Member] | Receivables on open futures contracts [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	5,185,782
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		126,834,194
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		1,266,423
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		30,130,619
VIX Futures Contracts [Member] | Receivables on open futures contracts, unrealized appreciation on swap agreements [Member] | ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		31,275,278
VIX Futures Contracts [Member] | Receivables on open futures contracts, unrealized appreciation on swap agreements [Member] | ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		642,035
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	352,389	8,958,745
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		993,117
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		1,921,414
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	170,218,095
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	194,426,957	8,206,161
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	10,384,367
Commodity Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]	64,729,871
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	28,869,220	549,283
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	154,070,341	13,436,251
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	1,532,546	158,079
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	4,389,928	652,493
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]	76,385,739	211,383,818
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		9,294,082
Commodity Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation	[1]		43,098,244
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares Short Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		5,400
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation		350,034	1,498
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares UltraShort Australian Dollar [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation	[1]		65,155
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation		79,162	93,933
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation		187,210	343,159
Foreign Exchange Contracts [Member] | Unrealized Depreciation on Foreign Currency Forward Contracts, and/or Payable on Open Futures Contracts [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability not accounted as hedging instrument, Unrealized Depreciation		156,206	367,588
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		17,639	84,150
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		2,012	821
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		3,382,293	135,118
Foreign Exchange Contracts [Member] | Unrealized Appreciation on Foreign Currency Forward Contracts, and/or Receivables on Open Futures Contracts [Member] | ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset not designated as hedging instrument, Unrealized Appreciation		$ 1,127,711	$ 1,237,168
[1] Includes cumulative appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only current day’s variation margin is reported within the Statements of Financial Condition in receivable/payable on open futures.

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 22
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