v3.21.1

Investments - Gross Amounts Not Offset in Statements of Financial Condition (Detail) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
ProShares Ultra Bloomberg Crude Oil [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	$ (7,714,941)	$ 1,377,243
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	(1,281,309)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	7,714,941	0
Net Amounts	0	95,934
ProShares Ultra Bloomberg Crude Oil [Member] | Morgan Stanley [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(14,480,061)	10,959,227
Financial Instruments for the Benefit of (the Funds) / the Counterparties	14,480,061	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	(10,629,000)
Net Amounts	0	330,227
ProShares Ultra Bloomberg Crude Oil [Member] | Societe Generale [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(7,452,971)	1,679,334
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	(1,679,334)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	7,452,971	0
Net Amounts	0	0
ProShares Ultra Bloomberg Crude Oil [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(11,100,621)	4,226,391
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	(4,151,442)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	11,100,621	(6,270)
Net Amounts	0	68,679
ProShares Ultra Euro [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(78,549)	22,950
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	78,549	0
Net Amounts	0	22,950
ProShares Ultra Euro [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(143,855)	65,786
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	143,855	0
Net Amounts	0	65,786
ProShares Ultra Gold [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	2,121,049	1,770,050
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(310,000)	(1,670,000)
Net Amounts	1,811,049	100,050
ProShares Ultra Gold [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	1,832,931	1,529,612
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(259,558)	(1,497,203)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	0
Net Amounts	1,573,373	32,409
ProShares Ultra Gold [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	2,206,451	1,841,318
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(330,000)	0
Net Amounts	1,876,451	1,841,318
ProShares Ultra Silver [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(8,800,436)	18,010,776
Financial Instruments for the Benefit of (the Funds) / the Counterparties	8,800,436	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	(18,010,776)
Net Amounts	0	0
ProShares Ultra Silver [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(6,616,052)	12,930,574
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	(12,930,574)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	6,616,052	0
Net Amounts	0	0
ProShares Ultra Silver [Member] | Morgan Stanley & Co. International PLC [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(6,918,147)	12,353,706
Financial Instruments for the Benefit of (the Funds) / the Counterparties	6,918,147	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	(12,353,706)
Net Amounts	0	0
ProShares Ultra Silver [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(6,086,368)	13,457,610
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	(4,126,610)
Cash Collateral for the Benefit of (the Funds) / the Counterparties	6,086,368	(9,331,000)
Net Amounts	0	0
ProShares Ultra VIX Short-Term Futures ETF [Member] | Goldman Sachs & Co. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	0	(24,807)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	24,807
Net Amounts	0	0
ProShares Ultra Yen [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(106,904)	34,265
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	106,904	0
Net Amounts	0	34,265
ProShares Ultra Yen [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(82,098)	32,822
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	82,098	0
Net Amounts	0	32,822
ProShares UltraShort Euro [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	1,328,784	(388,233)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(1,154,554)	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	388,233
Net Amounts	174,230	0
ProShares UltraShort Euro [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	1,925,909	(748,471)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	748,471
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(1,700,000)	0
Net Amounts	225,909	0
ProShares UltraShort Gold [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(291,552)	(80,068)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	156,152	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	135,400	80,068
Net Amounts	0	0
ProShares UltraShort Gold [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(301,800)	(82,645)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	301,800	82,645
Net Amounts	0	0
ProShares UltraShort Gold [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	(92,116)	(106,015)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	92,116	106,015
Net Amounts	0	0
ProShares UltraShort Silver [Member] | Citibank N.A. [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	248,259	(1,208,988)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(248,259)	1,208,988
Net Amounts	0	0
ProShares UltraShort Silver [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	135,199	(927,829)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(135,199)	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	927,829
Net Amounts	0	0
ProShares UltraShort Silver [Member] | Morgan Stanley & Co. International PLC [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	259,594	(579,421)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(259,594)	579,421
Net Amounts	0	0
ProShares UltraShort Silver [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	128,181	(481,323)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(128,181)	481,323
Net Amounts	0	0
ProShares UltraShort Yen [Member] | Goldman Sachs International [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	645,892	(207,021)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	(597,669)	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	0	207,021
Net Amounts	48,223	0
ProShares UltraShort Yen [Member] | UBS AG [Member]
Cash Collateral for the Benefit of (the Funds) / the Counterparties
Amounts of Recognized Assets / (Liabilities) presented in the Statements of Financial Condition	1,690,031	(357,945)
Financial Instruments for the Benefit of (the Funds) / the Counterparties	0	0
Cash Collateral for the Benefit of (the Funds) / the Counterparties	(1,510,000)	357,945
Net Amounts	$ 180,031	$ 0

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
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