v3.24.1.u1

Investments - Fair Value of Derivative Instruments (Detail) - USD ($) | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] | $ 141,808,792 | $ 122,342,647
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] | 133,865,310 | 61,421,374
VIX Futures Contracts [Member] | ProShares VIX Mid-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] | 17,267 |
VIX Futures Contracts [Member] | Receivable on open futures contracts, unrealized appreciation on swap agreements [Member] | ProShares Short VIX Short-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] | 8,013,037 | 12,640,624
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares Ultra VIX Short-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] | 17,898,783 | 31,183,911
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares VIX Mid-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] | 973,152 | 3,745,676
VIX Futures Contracts [Member] | Payable on open futures contracts, unrealized depreciation on swap agreements [Member] | ProShares VIX Short-Term Futures ETF [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] | 6,679,575 | 9,664,094
Commodities Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] | 69,578,110 | 20,191,987
Commodities Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] |  | 43,607,070
Commodities Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Gold [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] | 9,912,182 | 7,174,868
Commodities Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares Ultra Silver [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] | 31,214,049 | 12,400,748
Commodities Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Crude Oil [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] |  | 22,436,319
Commodities Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] | 20,277,127 |
Commodities Contracts [Member] | Receivables on open futures contracts and/or unrealized appreciation on swap agreements [Member] | ProShares UltraShort Silver [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation | [1] |  | 1,879,957
Commodities Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Bloomberg Crude Oil [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] |  | 5,752,284
Commodities Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Bloomberg Natural Gas [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] | 92,772,278 |
Commodities Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares Ultra Silver [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] |  | 2,827,221
Commodities 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] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] | 11,995,111 |
Commodities Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Bloomberg Natural Gas [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] |  | 3,553,507
Commodities Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Gold [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] | 688,631 | 344,052
Commodities Contracts [Member] | Payable on open futures contracts and/or unrealized depreciation on swap agreements [Member] | ProShares UltraShort Silver [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation | [1] | 543,730 | 1,005,085
Foreign Exchange Contracts [Member] | Unrealized appreciation on foreign currency forward contracts, and/or receivables on open futures contracts [Member] | ProShares Ultra Euro [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation |  | 965 | 308,424
Foreign Exchange Contracts [Member] | Unrealized appreciation on foreign currency forward contracts, and/or receivables on open futures contracts [Member] | ProShares Ultra Yen [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation |  | 5,548 | 1,534,924
Foreign Exchange Contracts [Member] | Unrealized appreciation on foreign currency forward contracts, and/or receivables on open futures contracts [Member] | ProShares UltraShort Euro [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation |  | 1,164,063 | 38,029
Foreign Exchange Contracts [Member] | Unrealized appreciation on foreign currency forward contracts, and/or receivables on open futures contracts [Member] | ProShares UltraShort Yen [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives asset not accounted for as hedging instruments, Unrealized Appreciation |  | 1,626,444 | 129,697
Foreign Exchange Contracts [Member] | Unrealized depreciation on foreign currency forward contracts, and/or payable on open futures contracts [Member] | ProShares Ultra Euro [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation |  | 203,530 | 1,475
Foreign Exchange Contracts [Member] | Unrealized depreciation on foreign currency forward contracts, and/or payable on open futures contracts [Member] | ProShares Ultra Yen [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation |  | 2,065,194 | 15,639
Foreign Exchange Contracts [Member] | Unrealized depreciation on foreign currency forward contracts, and/or payable on open futures contracts [Member] | ProShares UltraShort Euro [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation |  | 45,109 | 1,886,808
Foreign Exchange Contracts [Member] | Unrealized depreciation on foreign currency forward contracts, and/or payable on open futures contracts [Member] | ProShares UltraShort Yen [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivatives liability not accounted for as hedging instruments, Unrealized Depreciation |  | $ 217 | $ 1,441,622
[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.

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 + Details
Name: | us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the excess of the cost (face amount, notional amount) of an investment (security, contract) over its fair value which deficiency has not been recognized in earnings of the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-22 + Details
Name: | us-gaap_InvestmentOwnedUnrecognizedUnrealizedAppreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents the excess of the cost (face amount, notional amount) of an investment (security, contract) over its fair value which deficiency has not been recognized in earnings of the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-22 + Details
Name: | us-gaap_InvestmentOwnedUnrecognizedUnrealizedDepreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ck0001415311_VolatilityIndexFutureMember
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: | us-gaap_BalanceSheetLocationAxis=ck0001415311_ReceivableOnOpenFuturesContractsUnrealizedAppreciationOnSwapAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesShortVixShortTermFuturesEtfMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=ck0001415311_PayableOnOpenFuturesContractsUnrealizedDepreciationOnSwapAgreementsMember
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: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesVixShortTermFuturesEtfMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=ck0001415311_ReceivablesOnOpenFuturesContractsAndOrUnrealizedAppreciationOnSwapAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraBloombergCrudeOilMember
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: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraGoldMember
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: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortBloombergCrudeOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortBloombergNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortSilverMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=ck0001415311_PayableOnOpenFuturesContractsAndOrUnrealizedDepreciationOnSwapAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortGoldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=ck0001415311_UnrealizedAppreciationOnForeignCurrencyForwardContractsAndOrReceivablesOnOpenFuturesContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraEuroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraYenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortEuroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraShortYenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=ck0001415311_UnrealizedDepreciationOnForeignCurrencyForwardContractsAndOrPayableOnOpenFuturesContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |