v3.21.1

Organization (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Share Splits and Reverse Share Splits | The table below includes reverse Share splits for the Funds during the three months ended March 31 , 2021 , and during the year ended December 31, 2020. The ticker symbols for these Funds did not change, and each Fund continues to trade on its primary listing exchange, as applicable.
Fund |  | Execution Date (Prior to Opening of Trading) |  | Type of Split |  | Date Trading Resumed at Post- Split Price
ProShares Ultra Bloomberg Crude Oil |  | April 20, 2020 |  | 1-for-25 reverse Share split |  | April 21, 2020
ProShares Ultra Bloomberg Natural Gas |  | April 20, 2020 |  | 1-for-10 reverse Share split |  | April 21, 2020

X
- Definition Schedule of share splits and reverse share splits. + References No definition available. + Details
Name: | ck0001415311_ScheduleOfShareSplitsAndReverseShareSplitsTableTextBlock
Namespace Prefix: | ck0001415311_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration