Subsequent Event	9 Months Ended
Sep. 30, 2011
Subsequent Event [Abstract]
Subsequent Event	10. 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. As of January 2, 2012, the General Partner will change the trading strategy of the Partnership to a strategy in which the trading advisors employ proprietary trading models and methodologies that seek to identify favorable price relationships between and among various global currency and commodity markets through the analysis of technical market information. The Partnership will aim to achieve capital appreciation through speculative trading, directly and indirectly, in U.S. and international markets for currencies, agricultural and energy products and precious and base metals. The Partnership may employ futures, options on futures, and forward contracts in those markets. In implementing this new trading strategy, the General Partner has decided to change the name of the Partnership and to make certain changes to the Trading Advisors managing the assets on behalf of the Partnership. Effective January 1, 2012, the Partnership's name will change from “Morgan Stanley Smith Barney Spectrum Currency L.P.” to “Morgan Stanley Smith Barney Spectrum Currency and Commodity L.P.” In respect of the Trading Advisors, the General Partners will remove the following Trading Advisors from the Partnership as of December 31, 2011: JWH and Sunrise. Consequently, each of JWH and Sunrise will cease all futures interests trading on behalf of the Partnership as of that date. The General partners also has determined to add the following two new trading advisors to manage the assets of the Partnership as of January 1, 2012: Flintlock Capital Asset Management, LLC and Krom River Investment Management (Cayman) Limited (together with its affiliate, Krom River Trading AG).

10. 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.

As of January 2, 2012, the General Partner will change the trading strategy of the Partnership to a strategy in which the trading advisors employ proprietary trading models and methodologies that seek to identify favorable price relationships between and among various global currency and commodity markets through the analysis of technical market information. The Partnership will aim to achieve capital appreciation through speculative trading, directly and indirectly, in U.S. and international markets for currencies, agricultural and energy products and precious and base metals. The Partnership may employ futures, options on futures, and forward contracts in those markets. In implementing this new trading strategy, the General Partner has decided to change the name of the Partnership and to make certain changes to the Trading Advisors managing the assets on behalf of the Partnership. Effective January 1, 2012, the Partnership's name will change from “Morgan Stanley Smith Barney Spectrum Currency L.P.” to “Morgan Stanley Smith Barney Spectrum Currency and Commodity L.P.” In respect of the Trading Advisors, the General Partners will remove the following Trading Advisors from the Partnership as of December 31, 2011: JWH and Sunrise. Consequently, each of JWH and Sunrise will cease all futures interests trading on behalf of the Partnership as of that date. The General partners also has determined to add the following two new trading advisors to manage the assets of the Partnership as of January 1, 2012: Flintlock Capital Asset Management, LLC and Krom River Investment Management (Cayman) Limited (together with its affiliate, Krom River Trading AG).