Trading Advisors to the Trading Companies (Details)	12 Months Ended
	Dec. 31, 2012
Trading Advisors to the Trading Companies [Abstract]
Trading advisor incentive fee, on trading profits (in hundredths)	20.00%
Augustus I, LLC [Member]
Trading Advisors to the Trading Companies [Line Items]
Trading Advisor	GAM International Management Limited
Trading Strategy	Global Rates Program - Futures/FX Only
Chesapeake I, LLC [Member]
Trading Advisors to the Trading Companies [Line Items]
Trading Advisor	Chesapeake Capital Corporation
Trading Strategy	Diversified Trading Program
GLC I, LLC [Member]
Trading Advisors to the Trading Companies [Line Items]
Trading Advisor	GLC Ltd.
Trading Strategy	Global Macro Program
Kaiser I, LLC [Member]
Trading Advisors to the Trading Companies [Line Items]
Trading Advisor	Kaiser Trading Group Pty. Ltd.
Trading Strategy	Global Diversified Trading Program
Rotella I, LLC [Member]
Trading Advisors to the Trading Companies [Line Items]
Trading Advisor	Rotella Capital Management, Inc.
Trading Strategy	Polaris Program
TT II, LLC [Member]
Trading Advisors to the Trading Companies [Line Items]
Trading Advisor	Transtrend B.V.
Trading Strategy	Enhanced Risk Profile (USD) of Diversified Trend Program
WNT I, LLC [Member]
Trading Advisors to the Trading Companies [Line Items]
Trading Advisor	Winton Capital Management Limited
Trading Strategy	Diversified Trading Program