v3.24.1.u1

Investments - Effect of Derivative Instruments on Statements of Operations (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	$ (199,970,152)	$ (998,103,220)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(53,162,989)	(181,707,249)
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(200,040,097)	(998,089,690)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(52,977,791)	(181,490,158)
ProShares Short VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	28,514,617	29,604,148
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(4,654,821)	3,155,177
ProShares Ultra VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(90,992,592)	(182,241,208)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	13,280,569	2,037,527
ProShares VIX Mid-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(6,105,191)	(15,820,720)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,789,791	4,582,460
ProShares VIX Short-Term Futures ETF [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(31,754,134)	(46,096,694)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,969,180	1,130,026
ProShares Ultra Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	93,131,105	85,780,427
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	55,083,842	(138,210,442)
ProShares Ultra Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(242,180,914)	(1,061,634,864)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(136,392,955)	(53,009,690)
ProShares Ultra Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	18,474,282	10,799,896
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,721,192	10,688,379
ProShares Ultra Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(4,465,915)	(28,743,864)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	21,608,599	22,352,120
ProShares UltraShort Bloomberg Crude Oil [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(12,508,822)	27,614,767
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(34,449,133)	10,956,230
ProShares UltraShort Bloomberg Natural Gas [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	44,652,614	183,405,966
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	23,826,488	(44,959,798)
ProShares UltraShort Gold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(1,397,813)	(1,030,881)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(344,579)	(655,702)
ProShares UltraShort Silver [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	5,780,020	2,713,623
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(1,418,602)	(1,183,236)
ProShares Ultra Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	144,574	280,279
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(509,514)	(96,945)
ProShares Ultra Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(2,031,575)	(298,808)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(3,578,931)	(494,067)
ProShares UltraShort Euro [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(939,220)	(1,407,311)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,967,733	141,211
ProShares UltraShort Yen [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	1,708,812	(1,027,976)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,938,152	1,859,501
VIX Futures Contracts [Member] | Net realized gain (loss) on futures contracts and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and/or swap agreements [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	28,496,948	29,604,148
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(4,627,587)	3,178,807
VIX Futures Contracts [Member] | Net realized gain (loss) on futures contracts and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and/or swap agreements [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(91,003,229)	(182,233,430)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	13,285,128	2,046,250
VIX Futures Contracts [Member] | Net realized gain (loss) on futures contracts and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and/or swap agreements [Member] | ProShares VIX Mid-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(6,108,469)	(15,820,720)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,789,791	4,590,535
VIX Futures Contracts [Member] | Net realized gain (loss) on futures contracts and/or swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and/or swap agreements [Member] | ProShares VIX Short-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(31,758,964)	(46,096,702)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,984,519	1,147,992
Commodities Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	93,118,600	85,780,427
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	55,138,407	(138,159,516)
Commodities Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(242,180,914)	(1,061,631,294)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(136,379,348)	(52,989,637)
Commodities Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares Ultra Gold [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	18,471,271	10,799,896
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,737,314	10,711,116
Commodities Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares Ultra Silver [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(4,470,712)	(28,743,864)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	21,640,522	22,387,658
Commodities Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(12,515,601)	27,614,279
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(34,431,430)	10,971,115
Commodities Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	44,654,357	183,408,644
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	23,830,634	(44,952,803)
Commodities Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraShort Gold [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(1,397,813)	(1,030,881)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(344,579)	(655,702)
Commodities Contracts [Member] | Net realized gain (loss) on futures contracts and swap agreements/ changes in unrealized appreciation (depreciation) on futures contracts and swap agreements [Member] | ProShares UltraShort Silver [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	5,780,020	2,713,623
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(1,418,602)	(1,183,236)
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/ or foreign currency forward contracts/ changes in unrealized appreciation (depreciation) on futures and/ or foreign currency forward contracts [Member] | ProShares Ultra Euro [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	144,574	280,279
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(509,514)	(96,945)
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/ or foreign currency forward contracts/ changes in unrealized appreciation (depreciation) on futures and/ or foreign currency forward contracts [Member] | ProShares Ultra Yen [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(2,031,575)	(298,808)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	(3,578,931)	(494,067)
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/ or foreign currency forward contracts/ changes in unrealized appreciation (depreciation) on futures and/ or foreign currency forward contracts [Member] | ProShares UltraShort Euro [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(943,861)	(1,407,311)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	2,967,733	146,013
Foreign Exchange Contracts [Member] | Net realized gain (loss) on futures and/ or foreign currency forward contracts/ changes in unrealized appreciation (depreciation) on futures and/ or foreign currency forward contracts [Member] | ProShares UltraShort Yen [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	1,705,271	(1,027,976)
Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income	$ 2,938,152	$ 1,862,262

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4E

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(a))
-Publisher FASB
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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
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