Investment in the Funds - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
CMF Winton Master L.P. [Member]
Investment [Line Items]
Percentage owned by partnership	45.10%	45.80%
CMF Winton Master L.P. [Member] | Maximum [Member]
Investment [Line Items]
Maximum amount of partnership assets allocated to trading advisor	1.5 times
Willowbridge Associates Inc [Member] | Maximum [Member]
Investment [Line Items]
Maximum amount of partnership assets allocated to trading advisor	3.0 times
CMF TT II, LLC [Member]
Investment [Line Items]
Percentage owned by partnership	99.20%	95.80%
CMF Willowbridge Master Fund L.P.[Member]
Investment [Line Items]
Percentage owned by partnership	100.00%	82.50%
CMF FORT Contrarian Master Fund LLC [Member]
Investment [Line Items]
Percentage owned by partnership	87.30%
CMF FORT Contrarian Master Fund LLC [Member] | Maximum [Member]
Investment [Line Items]
Maximum amount of partnership assets allocated to trading advisor	1.25 times