Investment in the Funds - Partnership's Investments in, and Partnership's Pro Rata Share of Results of Operations of Funds (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
% of Partners' Capital		100.09%	82.22%
Fair Value	[1]	$ 606,579,513	$ 656,495,374
Income (Loss)		(48,172,549)	(1,840,380)	$ 35,131,599
Expenses, Clearing Fees		282,874	798,567	682,545
Expenses, Professional Fees		1,489,943	1,713,581	2,271,832
Management fees		7,223,233	9,007,592	10,669,966
Net income (loss)		$ (70,546,419)	$ (33,240,575)	$ (6,003,529)
CMF Winton Master L.P. [Member]
Investment Holdings [Line Items]
% of Partners' Capital		25.30%	23.38%
Fair Value		$ 153,304,033	$ 186,666,465
CMF TT II, LLC [Member]
Investment Holdings [Line Items]
% of Partners' Capital		24.51%	25.26%
Fair Value		$ 148,573,425	$ 201,709,447
CMF Willowbridge Master Fund L.P.[Member]
Investment Holdings [Line Items]
% of Partners' Capital		24.53%	33.58%
Fair Value		$ 148,663,921	$ 268,119,462
CMF FORT Contrarian Master Fund LLC [Member]
Investment Holdings [Line Items]
% of Partners' Capital		25.75%
Fair Value		$ 156,038,134
Investment In Funds [Member]
Investment Holdings [Line Items]
Income (Loss)		(23,821,998)	(417,485)
Expenses, Clearing Fees		4,034,148	2,935,341
Expenses, Professional Fees		148,390	85,257
Management fees		1,449,384	1,961,681
Incentive Fee		47,039	25,157
Net income (loss)		(29,500,959)	(5,424,921)
Investment In Funds [Member] | Commodity [Member] | CMF Winton Master L.P. [Member]
Investment Holdings [Line Items]
Income (Loss)		241,406	20,307,233
Expenses, Clearing Fees		214,137	235,397
Expenses, Professional Fees		30,606	29,118
Net income (loss)		$ (3,337)	$ 20,042,718
Investment Objective		Commodity Portfolio	Commodity Portfolio
Redemptions Permitted		Monthly	Monthly
Investment In Funds [Member] | Commodity [Member] | CMF TT II, LLC [Member]
Investment Holdings [Line Items]
Income (Loss)		$ (15,288,450)	$ (857,440)
Expenses, Clearing Fees		1,039,887	1,529,471
Expenses, Professional Fees		274	839
Management fees		1,449,384	1,961,681
Incentive Fee		47,039	25,157
Net income (loss)		$ (17,825,034)	$ (4,374,588)
Investment Objective		Commodity Portfolio	Commodity Portfolio
Redemptions Permitted		Monthly	Monthly
Investment In Funds [Member] | Commodity [Member] | CMF Willowbridge Master Fund L.P.[Member]
Investment Holdings [Line Items]
Income (Loss)		$ (825,674)	$ (19,867,278)
Expenses, Clearing Fees		2,381,900	1,170,473
Expenses, Professional Fees		64,577	55,300
Net income (loss)		$ (3,272,151)	$ (21,093,051)
Investment Objective		Commodity Portfolio	Commodity Portfolio
Redemptions Permitted		Monthly	Monthly
Investment In Funds [Member] | Commodity [Member] | CMF FORT Contrarian Master Fund LLC [Member]
Investment Holdings [Line Items]
Income (Loss)		$ (7,949,280)
Expenses, Clearing Fees		398,224
Expenses, Professional Fees		52,933
Net income (loss)		$ (8,400,437)
Investment Objective		Commodity Portfolio
Redemptions Permitted		Monthly

[1] Defined in Note 1.