v3.22.2

Schedule of Investments - Futures Contracts Purchased (Detail) - Futures Contracts [Member] - Contracts to Purchase [Member]	Jun. 30, 2022 USD ($) Contract
ProShares Ultra Bloomberg Crude Oil [Member]
Schedule of Investments [Line Items]
Total Unrealized (Depreciation)	$ 58,454,799
ProShares Ultra Bloomberg Crude Oil [Member] | WTI Crude Oil—NYMEX, expires September 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	2,204
Notional Amount at Value	$ 227,232,400
Total Unrealized (Depreciation)	$ (17,930,940)
ProShares Ultra Bloomberg Crude Oil [Member] | WTI Crude Oil—NYMEX, expires December 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	2,535
Notional Amount at Value	$ 242,244,600
Total Unrealized (Depreciation)	$ 64,744,247
ProShares Ultra Bloomberg Crude Oil [Member] | WTI Crude Oil—NYMEX, expires June 2023 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	2,688
Notional Amount at Value	$ 235,522,560
Total Unrealized (Depreciation)	$ 11,641,492
ProShares Ultra Bloomberg Natural Gas [Member] | Natural Gas - NYMEX, expires September 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	6,954
Notional Amount at Value	$ 374,959,680
Total Unrealized (Depreciation)	$ (194,426,957)
ProShares Ultra Gold [Member] | Gold Futures - COMEX, expires August 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	954
Notional Amount at Value	$ 172,416,420
Total Unrealized (Depreciation)	$ (3,932,509)
ProShares Ultra Silver [Member] | Silver Futures - COMEX, expires September 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	773
Notional Amount at Value	$ 78,660,480
Total Unrealized (Depreciation)	(4,317,941)
ProShares Ultra VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total Unrealized (Depreciation)	$ 35,444,518
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures—CBOE, expires July 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	26,481
Notional Amount at Value	$ 756,358,266
Total Unrealized (Depreciation)	$ 41,121,658
ProShares Ultra VIX Short-Term Futures ETF [Member] | VIX Futures—CBOE, expires August 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	24,277
Notional Amount at Value	$ 708,339,740
Total Unrealized (Depreciation)	(5,677,140)
ProShares VIX Mid-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total Unrealized (Depreciation)	$ 3,080,667
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures—CBOE, expires October 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	569
Notional Amount at Value	$ 16,944,251
Total Unrealized (Depreciation)	$ 1,648,250
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures—CBOE, expires November 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	1,089
Notional Amount at Value	$ 32,144,884
Total Unrealized (Depreciation)	$ 1,059,336
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures—CBOE, expires December 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	1,090
Notional Amount at Value	$ 31,400,611
Total Unrealized (Depreciation)	$ 444,206
ProShares VIX Mid-Term Futures ETF [Member] | VIX Futures—CBOE, expires January 2023 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	521
Notional Amount at Value	$ 15,420,610
Total Unrealized (Depreciation)	(71,125)
ProShares VIX Short-Term Futures ETF [Member]
Schedule of Investments [Line Items]
Total Unrealized (Depreciation)	$ 3,375,427
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures—CBOE, expires July 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	6,185
Notional Amount at Value	$ 176,657,825
Total Unrealized (Depreciation)	$ 5,185,782
ProShares VIX Short-Term Futures ETF [Member] | VIX Futures—CBOE, expires August 2022 [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	5,672
Notional Amount at Value	$ 165,494,213
Total Unrealized (Depreciation)	$ (1,810,355)

X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

+ Details

Name:	us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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 https://asc.fasb.org/extlink&oid=122147990&loc=SL6090603-123010

+ Details

Name:	us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciationDepreciationNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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.

+ Details

Name:	us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraBloombergCrudeOilMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_FutureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PositionAxis=us-gaap_LongMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_WtiCrudeOilNymexExpiresSeptemberTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_WtiCrudeOilNymexExpiresDecemberTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_WtiCrudeOilNymexExpiresJuneTwoThousandAndTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraBloombergNaturalGasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_NaturalGasNymexExpiresSeptemberTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraGoldMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_GoldFuturesComexExpiresAugustTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraSilverMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_SilverFuturesComexExpiresSeptemberTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraVixShortTermFuturesEtfMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_VixFuturesCboeExpiresJulyTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_VixFuturesCboeExpiresAugustTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesVixMidTermFuturesEtfMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_VixFuturesCboeExpiresOctoberTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_VixFuturesCboeExpiresNovemberTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_VixFuturesCboeExpiresDecemberTwoThousandAndTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ck0001415311_InvestmentsHoldingAxis=ck0001415311_VixFuturesCboeExpiresJanuaryTwoThousandAndTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesVixShortTermFuturesEtfMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: