v2.4.0.6

STATEMENTS OF CASH FLOWS (Parenthetical) (ProShares Trust II [Member], USD $) | 3 Months Ended
--- | ---
Mar. 31, 2013
ProShares Trust II [Member] |
Redemptions related to termination of New Funds | $ 600

X
- Definition Redemptions Related to De-Registration of Funds + References No definition available. + Details
Name: | ck0001415311_RedemptionsRelatedToDeRegistrationOfFunds
Namespace Prefix: | ck0001415311_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration