|ProShares UltraShort DJ-UBS Natural Gas|
|The investment seeks to replicate, net of expenses, twice the inverse of the performance of the Dow Jones-UBS Natural Gas Subindex for a single day.
The index reflects the performance of a rolling position in natural gas futures contract traded of the NYMEX without regard to income earned on cash positions.
The fund intends to meet its investment objective by taking long or short positions in natural gas futures contracts.|
| ||KOLD||Category Avg|
|Annual Report Expense Ratio (net)||0.95%||N/A|
|Annual Holdings Turnover||N/A||N/A|
|Total Net Assets||NaN||N/A|