v3.21.1

Schedule of Investments - Total Return Swap Agreements (Detail) - Swap Agreements [Member]

3 Months Ended

Mar. 31, 2021

USD ($)

ProShares Ultra Bloomberg Crude Oil [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)/ Value

$ (40,748,594)

^[1]

ProShares Ultra Bloomberg Crude Oil [Member] | Goldman Sachs International [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.35%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 108,014,255

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

$ (7,714,940)

^[1]

ProShares Ultra Bloomberg Crude Oil [Member] | Morgan Stanley & Co. International PLC [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.35%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 202,730,402

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

$ (14,480,063)

^[1]

ProShares Ultra Bloomberg Crude Oil [Member] | Societe Generale [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 104,445,210

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

$ (7,452,971)

^[1]

ProShares Ultra Bloomberg Crude Oil [Member] | UBS AG [Member] | WTI Crude Oil Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.30%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 155,489,475

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

(11,100,620)

^[1]

ProShares Ultra Gold [Member] | Gold Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)/ Value

$ 6,160,430

^[1]

ProShares Ultra Gold [Member] | Citibank N.A. [Member] | Gold Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 105,063,244

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

$ 2,121,049

^[1]

ProShares Ultra Gold [Member] | Goldman Sachs International [Member] | Gold Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 90,791,674

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

$ 1,832,931

^[1]

ProShares Ultra Gold [Member] | UBS AG [Member] | Gold Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 109,293,502

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

2,206,450

^[1]

ProShares Ultra Silver [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)/ Value

$ (28,421,003)

^[1]

ProShares Ultra Silver [Member] | Citibank N.A. [Member] | Silver Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 291,359,450

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

$ (8,800,436)

^[1]

ProShares Ultra Silver [Member] | Goldman Sachs International [Member] | Silver Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.30%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 218,805,087

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

$ (6,616,052)

^[1]

ProShares Ultra Silver [Member] | Morgan Stanley & Co. International PLC [Member] | Silver Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.30%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 228,795,897

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

$ (6,918,147)

^[1]

ProShares Ultra Silver [Member] | UBS AG [Member] | Silver Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

^[1],[2]

Termination Date

Apr. 06, 2021

^[1]

Derivative Asset, Notional Amount

$ 201,503,724

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

(6,086,368)

^[1]

ProShares Ultra VIX Short-Term Futures ETF [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)/ Value

^[1]

ProShares Ultra VIX Short-Term Futures ETF [Member] | Goldman Sachs International [Member] | Swap agreement with Goldman Sachs & Co., based on iPath Series B S&P 500 VIX Short-Term Futures ETN iNAV Index [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.97%

^[1],[2]

Termination Date

Apr. 28, 2021

^[1]

Derivative Asset, Notional Amount

$ 120,270,000

^[1],[3]

Unrealized Appreciation (Depreciation)/ Value

^[1]

ProShares UltraShort Gold [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)/ Value

$ (685,467)

ProShares UltraShort Gold [Member] | Citibank N.A. [Member] | Gold Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

Termination Date

Apr. 06, 2021

Derivative Liability, Notional Amount

$ (14,224,080)

Unrealized Appreciation (Depreciation)/ Value

$ (291,552)

ProShares UltraShort Gold [Member] | Goldman Sachs International [Member] | Gold Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.20%

Termination Date

Apr. 06, 2021

Derivative Liability, Notional Amount

$ (14,746,325)

Unrealized Appreciation (Depreciation)/ Value

$ (301,800)

ProShares UltraShort Gold [Member] | UBS AG [Member] | Gold Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

Termination Date

Apr. 06, 2021

Derivative Liability, Notional Amount

$ (11,127,395)

Unrealized Appreciation (Depreciation)/ Value

(92,115)

Proshares Ultra Short Silver [Member]

Schedule of Investments [Line Items]

Unrealized Appreciation (Depreciation)/ Value

$ 771,233

Proshares Ultra Short Silver [Member] | Citibank N.A. [Member] | Silver Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

Termination Date

Apr. 06, 2021

Derivative Liability, Notional Amount

$ (8,308,475)

Unrealized Appreciation (Depreciation)/ Value

$ 248,258

Proshares Ultra Short Silver [Member] | Goldman Sachs International [Member] | Silver Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

Termination Date

Apr. 06, 2021

Derivative Liability, Notional Amount

$ (15,457,845)

Unrealized Appreciation (Depreciation)/ Value

$ 135,200

Proshares Ultra Short Silver [Member] | Morgan Stanley & Co. International PLC [Member] | Silver Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.30%

Termination Date

Apr. 06, 2021

Derivative Liability, Notional Amount

$ (8,697,261)

Unrealized Appreciation (Depreciation)/ Value

$ 259,594

Proshares Ultra Short Silver [Member] | UBS AG [Member] | Silver Subindex [Member] | Bloomberg [Member]

Schedule of Investments [Line Items]

Rate Paid (Received)

0.25%

Termination Date

Apr. 06, 2021

Derivative Liability, Notional Amount

$ (15,222,974)

Unrealized Appreciation (Depreciation)/ Value

$ 128,181

[1]	The positions and counterparties herein are as of March 31, 2021. The Fund continually evaluates different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.
[2]	Reflects the floating financing rate, as of March 31, 2021, on the notional amount of the swap agreement paid to the counterparty or received from the counterparty, excluding any commissions. Total Return Swap Agreements payment is due at termination/maturity.
[3]	For swap agreements, a positive amount represents “long” exposure to the benchmark index. A negative amount represents “short” exposure to the benchmark index.

X

- Definition

Nominal or face amount used to calculate payments on the derivative asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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X

- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

+ Details

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Balance Type:	na
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X

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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X

- Definition

Fixed interest rate that will be received or paid upon exercise of the interest rate swaption contract.

+ References

No definition available.

+ Details

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X

- Definition

This element represents the net excess or deficiency of the fair value of an investment (security, contract) over or under its cost (face amount, notional amount), respectively, which excess value or deficiency has not been recognized in earnings of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120401592&loc=SL6090603-123010

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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

No definition available.

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