v3.24.1.u1

Organization - Schedule of Forward and Reverse Share Splits (Detail) |  | 3 Months Ended
--- | --- | ---
Mar. 20, 2024 | Mar. 31, 2024
Organization [Line Items] |  |
Type of Split | 1-for-5 reverse split of the shares of beneficial interest of ProShares Ultra VIX Short-Term Futures (ticker symbol: UVXY) |
June 22, 2023 Reverse Share Split [Member] | ProShares VIX ShortTerm Futures [Member] |  |
Organization [Line Items] |  |
Execution Date (Prior to Opening of Trading) |  | Jun. 22, 2023
Type of Split |  | 1-for-5 reverse Share split
Date Trading Resumed at Post- Split Price |  | Jun. 23, 2023
June 22, 2023 Reverse Share Split [Member] | ProShares Ultra VIX ShortTerm Futures [Member] |  |
Organization [Line Items] |  |
Execution Date (Prior to Opening of Trading) |  | Jun. 22, 2023
Type of Split |  | 1-for-10 reverse Share split
Date Trading Resumed at Post- Split Price |  | Jun. 23, 2023
June 22, 2023 Reverse Share Split [Member] | Proshares Ultra Bloomberg Natural Gas [Member] |  |
Organization [Line Items] |  |
Execution Date (Prior to Opening of Trading) |  | Jun. 22, 2023
Type of Split |  | 1-for-20 reverse Share split
Date Trading Resumed at Post- Split Price |  | Jun. 23, 2023

X
- Definition Execution date prior to opening of trading. + References No definition available. + Details
Name: | ck0001415311_ExecutionDatePriorToOpeningOfTrading
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Organization. + References No definition available. + Details
Name: | ck0001415311_OrganizationLineItems
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Post split price, trading resumed date. + References No definition available. + Details
Name: | ck0001415311_PostSplitPriceTradingResumedDate
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the stock split arrangement. Also provide the retroactive effect given by a stock split that occurs after the balance date but before the release of financial statements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.C) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-4 + Details
Name: | us-gaap_StockholdersEquityNoteStockSplit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementScenarioAxis=ck0001415311_June222023ReverseShareSplitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesVixShorttermFuturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ck0001415311_ProsharesUltraVixShorttermFuturesMember
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: |