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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2011
Subsequent Events [Abstract]
Subsequent Events	8. Subsequent Events Management of Ceres performed its evaluation of subsequent events through the date of filing, and has determined that there were no subsequent events requiring adjustment of or disclosure in the financial statements other than these disclosed below. Effective October 31, 2011, State Street Bank and Trust Company (“State Street”) ceased to serve as the administrator to the Partnership and each Trading Company. Effective November 1, 2011, the administrative services previously provided by State Street are provided by Morgan Stanley Smith Barney.