XML 29 R22.htm IDEA: XBRL DOCUMENT v2.4.0.8
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details) (USD $)
 9 Months Ended
Sep. 30, 2014
Significant Accounting Policies [Line Items]  
Minimum likelihood of tax benefits being recognized upon ultimate settlement 50.00%
Recognized interest income expense and penalties related to unrecognized tax benefits $ 0
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets 350
Redemption Baskets [Member]
  
Significant Accounting Policies [Line Items]  
Number of units per basket 50,000
Maximum [Member]
  
Significant Accounting Policies [Line Items]  
Cash equivalents maturity period 6 months