Ceres Orion (OFFLP) 10-K30 Mar 202019 FY Annual reportFinancial data

Company Profile

Cover Page

Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	Dec. 31, 2019	Feb. 29, 2020	Jun. 30, 2019
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	CERES ORION L.P.
Entity Central Index Key	0001227265
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Address, State or Province	NY
Class A Redeemable Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		168,167.8548
Entity Public Float			$ 520,413,784
Class Z Redeemable Units [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		4,706.5572
Entity Public Float			$ 4,285,651

Statements of Financial Conditi

Statements of Financial Condition - USD ($)		Dec. 31, 2019	Dec. 31, 2018
Assets:
Investment in the Funds(1) , at fair value	[1]	$ 330,936,811	$ 606,579,513
Redemptions receivable from the Funds		11,850,318	15,961,188
Equity in trading account:
Unrestricted cash		117,008,427	727,149
Restricted cash		44,439,575	0
Net unrealized appreciation on open forward contracts		0	29,057
Total equity in trading account		161,448,002	756,206
Interest receivable		155,105	0
Total assets		504,390,236	623,296,907
Liabilities:
Net unrealized depreciation on open futures contracts		1,758,548
Accrued expenses:
Ongoing selling agent fees		2,814,316	1,777,733
Management fees		411,567	512,011
General Partner fees		312,127	388,049
Incentive fees		2,013,630	0
Professional fees		414,915	371,405
Subscriptions payable to the Funds		0	261,448
Redemptions payable to Limited Partners		13,393,882	13,927,786
Total liabilities		21,118,985	17,238,432
Partners' Capital:
Total partners' capital (net asset value)		483,271,251	606,058,475
Total liabilities and partners' capital		504,390,236	623,296,907
Class Z Redeemable Units [Member]
Partners' Capital:
General Partner, Class Z, 5,058.6813 and 6,495.6793 Redeemable Units outstanding at September 30, 2019 and December 31, 2018, respectively		5,594,958	6,716,925
Limited Partners		5,205,506	4,310,125
Total partners' capital (net asset value)		$ 10,800,464	$ 11,027,050
Net asset value per Redeemable Unit:
Net asset value per Redeemable Unit		$ 1,106.01	$ 1,034.06
Class A Redeemable Units [Member]
Partners' Capital:
Limited Partners		$ 472,470,787	$ 595,031,425
Total partners' capital (net asset value)		$ 472,470,787	$ 595,031,425
Net asset value per Redeemable Unit:
Net asset value per Redeemable Unit		$ 2,728.91	$ 2,608.11
Futures Contracts [Member]
Equity in trading account:
Net unrealized appreciation on open forward contracts		$ 0
Liabilities:
Net unrealized depreciation on open futures contracts		1,758,548	$ 0
Forward Contracts [Member]
Equity in trading account:
Net unrealized appreciation on open forward contracts		$ 0	$ 29,057

[1]	Defined in Note 1.

Statements of Financial Condi_2

Statements of Financial Condition (Parenthetical) - shares	Dec. 31, 2019	Dec. 31, 2018
Class Z Redeemable Units [Member]
General Partner Capital, Redeemable units outstanding	5,058.6813	6,495.6793
Limited Partners Capital, Redeemable units outstanding	4,706.5572	4,168.1552
Class A Redeemable Units [Member]
Limited Partners Capital, Redeemable units outstanding	173,135.1328	228,146.2478

Condensed Schedule of Investmen

Condensed Schedule of Investments		Dec. 31, 2019USD ($)Contract	Dec. 31, 2018USD ($)Contract
Schedule of Investments [Line Items]
Total investment in the Funds, Fair Value	[1]	$ 330,936,811	$ 606,579,513
% of Partners' Capital		68.48%	100.09%
Futures Contracts [Member]
Schedule of Investments [Line Items]
Net unrealized and depreciation on open futures contracts		$ (1,758,548)
% of Partners' Capital		(0.36%)
Forward Contracts [Member]
Schedule of Investments [Line Items]
Net unrealized and depreciation on open futures contracts			$ 29,057
Unrealized Depreciation on Open Forward Contracts, Notional Amount			$ (108,245)
% of Partners' Capital			0.00%
Unrealized Appreciation on Open Forward Contracts, Notional Amount			$ 137,302
Total Unrealized Appreciation on Open Contracts [Member] \| Forward Contracts [Member]
Schedule of Investments [Line Items]
% of Partners' Capital			0.02%
Total Unrealized Depreciation on Open Contracts [Member] \| Forward Contracts [Member]
Schedule of Investments [Line Items]
% of Partners' Capital			(0.02%)
CMF Winton Master L.P. [Member]
Schedule of Investments [Line Items]
Total investment in the Funds, Fair Value		$ 77,128,248	$ 153,304,033
% of Partners' Capital		15.96%	25.30%
CMF TT II, LLC [Member]
Schedule of Investments [Line Items]
Total investment in the Funds, Fair Value		$ 119,608,248	$ 148,573,425
% of Partners' Capital		24.75%	24.51%
CMF Willowbridge Master Fund L.P.[Member]
Schedule of Investments [Line Items]
Total investment in the Funds, Fair Value		$ 0	$ 148,663,921
% of Partners' Capital		0.00%	24.53%
CMF FORT Contrarian Master Fund LLC [Member]
Schedule of Investments [Line Items]
Total investment in the Funds, Fair Value		$ 116,899,563	$ 156,038,134
% of Partners' Capital		24.19%	25.75%
CMFNL Master Fund LLC [Member]
Schedule of Investments [Line Items]
Total investment in the Funds, Fair Value		$ 17,300,752
% of Partners' Capital		3.58%
Metals [Member] \| Forward Contracts [Member]
Schedule of Investments [Line Items]
Unrealized Depreciation on Open Forward Contracts, Notional Amount			$ (108,245)
Unrealized Appreciation on Open Forward Contracts, Notional Amount			$ 137,302
Metals [Member] \| Total Unrealized Appreciation on Open Contracts [Member] \| Forward Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract			33
% of Partners' Capital			0.02%
Metals [Member] \| Total Unrealized Depreciation on Open Contracts [Member] \| Forward Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract			23
% of Partners' Capital			(0.02%)
Long [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Net unrealized and depreciation on open futures contracts		$ 35,905,301
% of Partners' Capital		7.43%
Long [Member] \| Currencies [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		3,451
Net unrealized and depreciation on open futures contracts		$ 995,485
% of Partners' Capital		0.21%
Long [Member] \| Energy [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		7,974
Net unrealized and depreciation on open futures contracts		$ 15,241,977
% of Partners' Capital		3.15%
Long [Member] \| Grains [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		14,839
Net unrealized and depreciation on open futures contracts		$ 8,666,809
% of Partners' Capital		1.79%
Long [Member] \| Indices [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		2,675
Net unrealized and depreciation on open futures contracts		$ 58,400
% of Partners' Capital		0.01%
Long [Member] \| Interest Rates U.S. [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		16
Net unrealized and depreciation on open futures contracts		$ (27,500)
% of Partners' Capital		(0.01%)
Long [Member] \| Interest Rates Non-U.S. [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		8,237
Net unrealized and depreciation on open futures contracts		$ (3,009,347)
% of Partners' Capital		(0.62%)
Long [Member] \| Livestock [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		2,783
Net unrealized and depreciation on open futures contracts		$ 1,536,513
% of Partners' Capital		0.32%
Long [Member] \| Metals [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		2,283
Net unrealized and depreciation on open futures contracts		$ 2,466,858
% of Partners' Capital		0.51%
Long [Member] \| Softs [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		10,384
Net unrealized and depreciation on open futures contracts		$ 9,976,106
% of Partners' Capital		2.07%
Short [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Net unrealized and depreciation on open futures contracts		$ (37,663,849)
% of Partners' Capital		(7.79%)
Short [Member] \| Currencies [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		435
Net unrealized and depreciation on open futures contracts		$ (165,465)
% of Partners' Capital		(0.03%)
Short [Member] \| Energy [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		8,739
Net unrealized and depreciation on open futures contracts		$ (7,074,868)
% of Partners' Capital		(1.46%)
Short [Member] \| Grains [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		13,303
Net unrealized and depreciation on open futures contracts		$ (13,462,345)
% of Partners' Capital		(2.79%)
Short [Member] \| Indices [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		951
Net unrealized and depreciation on open futures contracts		$ 414,377
% of Partners' Capital		0.09%
Short [Member] \| Interest Rates U.S. [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		845
Net unrealized and depreciation on open futures contracts		$ 37,969
% of Partners' Capital		0.01%
Short [Member] \| Interest Rates Non-U.S. [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		1,758
Net unrealized and depreciation on open futures contracts		$ 497,250
% of Partners' Capital		0.10%
Short [Member] \| Livestock [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		2,329
Net unrealized and depreciation on open futures contracts		$ (879,773)
% of Partners' Capital		(0.18%)
Short [Member] \| Metals [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		2,065
Net unrealized and depreciation on open futures contracts		$ (3,077,203)
% of Partners' Capital		(0.64%)
Short [Member] \| Softs [Member] \| Futures Contracts [Member]
Schedule of Investments [Line Items]
Number of Contracts \| Contract		9,846
Net unrealized and depreciation on open futures contracts		$ (13,953,791)
% of Partners' Capital		(2.89%)

[1]	Defined in Note 1.

Statements of Income and Expens

Statements of Income and Expenses - USD ($)		12 Months Ended
Statements of Income and Expenses - USD ($)		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investment Income:
Interest income		$ 2,243,877	$ 1,042,227	$ 1,376,191
Interest income allocated from the Funds		7,402,235	10,572,228	5,310,193
Total investment income		9,646,112	11,614,455	6,686,384
Expenses:
Expenses allocated from the Funds		3,064,354	5,678,961	5,007,436
Clearing fees related to direct investments		5,384,435	282,874	798,567
Ongoing selling agent fees		11,879,238	13,875,364	14,906,992
Management fees		5,411,434	7,223,233	9,007,592
General Partner fees		4,132,207	5,437,950	6,652,411
Incentive fees		2,906,619	0	0
Professional fees		1,226,099	1,489,943	1,713,581
Total expenses		34,004,386	33,988,325	38,086,579
Net investment loss		(24,358,274)	(22,373,870)	(31,400,195)
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net realized gains (losses) on closed contracts		20,220,080	(8,020,735)	923,428
Net realized gains (losses) on closed contracts allocated from the Funds		31,305,655	(18,104,021)	(5,736,352)
Net change in unrealized gains (losses) on open contracts		(1,669,805)	(5,757,588)	2,963,870
Net change in unrealized gains (losses) on open contracts allocated from the Funds		193,333	(16,290,205)	8,674
Total trading results		50,049,263	(48,172,549)	(1,840,380)
Net income (loss)		25,690,989	(70,546,419)	(33,240,575)
Class A Redeemable Units [Member]
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net income (loss)		$ 24,975,794	$ (69,603,950)	$ (32,973,626)
Net income (loss) per Redeemable Unit	[1]	$ 120.80	$ (279.35)	$ (95.18)
Weighted average Redeemable Units outstanding		197,078.5971	255,692.4903	304,610.1982
Class Z Redeemable Units [Member]
Net gains (losses) on trading of commodity interests and investment in the Funds:
Net income (loss)		$ 715,195	$ (942,469)	$ (266,949)
Net income (loss) per Redeemable Unit	[1]	$ 71.95	$ (88.75)	$ (17.17)
Weighted average Redeemable Units outstanding		10,037.7007	11,355.4058	12,023.4060

[1]	Represents the change in net asset value per Redeemable Unit.

Statements of Changes in Partne

Statements of Changes in Partners' Capital - USD ($)	Total	Limited Partners [Member]	General Partner [Member]	Class A Redeemable Units [Member]	Class A Redeemable Units [Member]Limited Partners [Member]	Class Z Redeemable Units [Member]	Class Z Redeemable Units [Member]Limited Partners [Member]	Class Z Redeemable Units [Member]General Partner [Member]
Net asset value per Redeemable Unit				$ 2,982.64		$ 1,139.98
Partners' Capital, beginning of period at Dec. 31, 2016	$ 997,913,751			$ 983,754,958		$ 14,158,793
Subscriptions		$ 34,917,405			$ 33,736,567		$ 1,180,838
Redemptions		$ (199,782,666)	$ (1,274,988)		$ (198,980,126)		$ (802,540)	$ (1,274,988)
Net income (loss)	(33,240,575)			(32,973,626)		(266,949)
Partners' Capital, end of period at Dec. 31, 2017	$ 798,532,927			$ 785,537,773		$ 12,995,154
Partners' Capital, beginning of period at Dec. 31, 2016	342,247.1463			329,826.9338		12,420.2125
Subscriptions - Redemptions Units		12,757.7100			11,683.0890		1,074.6210
Redemptions - Redeemable Units		(70,201.7950)	(1,178.1120)		(69,458.8670)		(742.9280)	(1,178.1120)
Partners' Capital, end of period at Dec. 31, 2017	283,624.9493			272,051.1558		11,573.7935
Net asset value per Redeemable Unit				$ 2,887.46		$ 1,122.81
Subscriptions		$ 31,006,582			$ 29,451,751		$ 1,554,831
Redemptions		$ (150,634,605)	$ (2,300,010)		$ (150,354,149)		$ (280,456)	$ (2,300,010)
Net income (loss)	$ (70,546,419)			$ (69,603,950)		$ (942,469)
Partners' Capital, end of period at Dec. 31, 2018	$ 606,058,475			$ 595,031,425		$ 11,027,050
Subscriptions - Redemptions Units		11,892.8620			10,485.7950		1,407.0670
Redemptions - Redeemable Units		(54,651.0220)	(2,056.7070)		(54,390.7030)		(260.3190)	(2,056.7070)
Partners' Capital, end of period at Dec. 31, 2018	238,810.0823			228,146.2478		10,663.8345
Net asset value per Redeemable Unit				$ 2,608.11		$ 1,034.06
Subscriptions		$ 24,073,170			$ 22,602,847		$ 1,470,323
Redemptions		$ (170,961,319)	$ (1,590,064)		$ (170,139,279)		$ (822,040)	$ (1,590,064)
Net income (loss)	$ 25,690,989			$ 24,975,794		$ 715,195
Partners' Capital, end of period at Dec. 31, 2019	$ 483,271,251			$ 472,470,787		$ 10,800,464
Subscriptions - Redemptions Units		9,256.7000			7,968.6900		1,288.0100
Redemptions - Redeemable Units		(63,729.4130)	(1,436.9980)		(62,979.8050)		(749.6080)	(1,436.9980)
Partners' Capital, end of period at Dec. 31, 2019	182,900.3713			173,135.1328		9,765.2385
Net asset value per Redeemable Unit				$ 2,728.91		$ 1,106.01

Organization

Organization	12 Months Ended
Organization	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	1. Organization: Ceres Orion L.P. (the “Partnership”) is a limited partnership organized on March 22, 1999, under the partnership laws of the State of New York, to engage, directly or indirectly, in the speculative trading of a diversified portfolio of commodity interests, including futures, option, swap and forward contracts. The sectors traded include currencies, energy, grains, livestock, indices, United States (“U.S.”) and non-U.S. Ceres Managed Futures LLC, a Delaware limited liability company, acts as the general partner (the “General Partner”) and commodity pool operator of the Partnership and is the trading manager (the “Trading Manager”) of Transtrend Master (as defined below), FORT Contrarian Master (as defined below) and NL Master (as defined below). The General Partner is a wholly-owned subsidiary of Morgan Stanley Domestic Holdings, Inc. (“MSD Holdings”). MSD Holdings is ultimately owned by Morgan Stanley. Morgan Stanley is a publicly held company whose shares are listed on the New York Stock Exchange. Morgan Stanley is engaged in various financial services and other businesses. As of December 31, 2019, all trading decisions were made for the Partnership by Winton Capital Management Limited (“Winton”), Transtrend B.V. (“Transtrend”), FORT L.P. (“FORT”), John Street Capital Limited (“JSCL”) and Northlander Commodity Advisors LLP (“Northlander”) (each an “Advisor” and, collectively, the “Advisors”), each of which is a registered commodity trading advisor. On January 31, 2019, the Partnership fully redeemed its investment in CMF Willowbridge Master Fund L.P. (“Willowbridge Master”). Also effective January 31, 2019, Willowbridge Associates Inc. (“Willowbridge”) ceased to act as a commodity trading advisor to the Partnership. Effective the close of business on October 31, 2018, Systematica Investments Limited (“Systematica”) ceased to act as a commodity trading advisor to the Partnership. References herein to the “Advisors” may include, as relevant, John Street (as defined below), Willowbridge and Systematica. Each Advisor is allocated a portion of the Partnership’s assets to manage. The Partnership invests the portion of its assets allocated to each of the Advisors either directly, through a managed account in the Partnership’s name, or indirectly, through its investment in the Funds. In addition, the General Partner may allocate the Partnership’s assets to additional non-major From February 1, 2019 until December 12, 2019, John Street Capital LLP (“John Street”) directly traded the Partnership’s assets allocated to it through a managed account in the name of the Partnership pursuant to John Street’s Systematic Strategy Program. On December 13, 2019, the Partnership, the General Partner, John Street, and JSCL entered into a deed of novation (the “JSCL Novation Agreement”) transferring all rights and obligations of John Street to JSCL. JSCL directly trades the Partnership’s assets allocated to it through a managed account in the name of the Partnership pursuant to the Systematic Strategy Program. Prior to its termination effective October 31, 2018, Systematica directly traded the Partnership’s assets allocated to it through a managed account in the name of the Partnership pursuant to Systematica’s BlueTrend Program. On June 1, 2011, the Partnership began offering “Class A” Redeemable Units and “Class Z” Redeemable Units pursuant to the offering memorandum. All Redeemable Units issued prior to June 1, 2011 were deemed Class A Redeemable Units. The rights, powers, duties and obligations associated with investment in Class A Redeemable Units were not changed. Class A Redeemable Units are available to taxable U.S. individuals and institutions, U.S. tax exempt individuals and institutions and non-U.S. During the periods covered by this report, the Partnership’s/Funds’ commodity broker was Morgan Stanley & Co. LLC (“MS&Co.”), a registered futures commission merchant. JPMorgan Chase Bank, N.A. (“JPMorgan”) was also a foreign exchange forward contract counterparty for certain Funds. During the prior periods included in this report, the Partnership/Funds deposited a portion of their cash in non-trading Effective February 28, 2018, the Partnership changed its name from Orion Futures Fund L.P. to Ceres Orion L.P. The Partnership, CMF Winton Master L.P. (“Winton Master”) and CMF TT II, LLC (“Transtrend Master”) have, and prior to its termination, Willowbridge Master had, entered into futures brokerage account agreements and foreign exchange brokerage account agreements with MS&Co. CMF FORT Contrarian Master Fund LLC (“FORT Contrarian Master”) and CMF NL Master Fund LLC (“NL Master”) have entered into futures brokerage account agreements with MS&Co. Winton Master, Transtrend Master, FORT Contrarian Master and NL Master are collectively referred to as the “Funds.” References herein to “Funds” may also include, as relevant, Willowbridge Master. Effective July 12, 2017, Winton Master, Transtrend Master and until its termination, Willowbridge Master, each entered into certain agreements with JPMorgan in connection with trading in forward foreign currency contracts on behalf of the referenced Funds and indirectly, the Partnership. These agreements include a foreign exchange and bullion authorization agreement (“FX Agreement”), an International Swap Dealers Association, Inc. master agreement (“Master Agreement”), a schedule to the Master Agreement, a 2016 credit support annex for variation margin to the schedule and an institutional account agreement. In addition to Willowbridge Master, Willowbridge was party to the FX Agreement for Willowbridge Master. Under each FX Agreement, JPMorgan charges a fee on the aggregate foreign currency transactions entered into on behalf of the respective Fund during a month. The Partnership will be liquidated upon the first to occur of the following: December 31, 2055; the net asset value per Redeemable Unit of any Class decreases to less than $400 as of the close of any business day; or under certain other circumstances as set forth in the limited partnership agreement of the Partnership, as may be amended from time to time (the “Limited Partnership Agreement”). In addition, the General Partner may, in its sole discretion, cause the Partnership to dissolve if the aggregate net assets of the Partnership decline to less than $1,000,000. The General Partner has delegated certain administrative functions to SS&C Technologies, Inc., a Delaware corporation, currently doing business as SS&C GlobeOp (the “Administrator”). Pursuant to a master services agreement, the Administrator furnishes certain administrative, accounting, regulatory reporting, tax and other services as agreed from time to time. In addition, the Administrator maintains certain books and records of the Partnership. The cost of retaining the Administrator is allocated among the pools operated by the General Partner, including the Partnership.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	2. Basis of Presentation and Summary of Significant Accounting Policies: a. Use of Estimates. b. Profit Allocation c. Statement of Cash Flows “Statement of Cash Flows.” d. Partnership’s Investment in the Funds. e. Partnership’s/Funds’ Derivative Investments. first-in, first-out The Partnership and the Funds do not isolate the portion of the results of operations arising from the effect of changes in foreign exchange rates on investments from fluctuations due to changes in market prices of investments held. Such fluctuations are included in total trading results in the Partnership’s/Funds’ Statements of Income and Expenses. f. Partnership’s Cash. g. Income Taxes “Income Taxes,” “more-likely-than-not” more-likely-than-not h. Investment Company Status. 2013-08 “Financial Services—Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements” i. Net Income (Loss) Per Redeemable Unit. “Financial Services - Investment Companies.”

Agreements

Agreements	12 Months Ended
Agreements	Dec. 31, 2019
Text Block [Abstract]
Agreements	3. Agreements: a. Limited Partnership Agreement: The General Partner administers the business and affairs of the Partnership, including selecting one or more advisors to make trading decisions for the Partnership. The Partnership pays the General Partner a monthly fee (the “General Partner fee”) equal to 1/12 of 0.75% (0.75% per year) of month-end Month-end b. Management Agreement: The General Partner, on behalf of the Partnership, has entered into management agreements (each, a “Management Agreement”) with the Advisors. The Advisors are not affiliated with one another, the General Partner or MS&Co., and are not responsible for the organization or operation of the Partnership. Effective February 1, 2018, the Partnership pays to FORT a monthly management fee equal to 1.15% per year of month-end month-end month-end month-end month-end month-end month-end month-end month-end Month-end Transtrend Master pays Transtrend a monthly management fee of 0.85% per year on the aggregate net assets of Transtrend Master as of the first day of each month. The management fee paid by Transtrend Master is allocated to the Partnership based on its proportionate ownership interest of Transtrend Master. In addition, Winton is eligible to receive and prior to its termination effective January 31, 2019, Willowbridge was eligible to receive, an incentive fee, payable quarterly, equal to 20% of the New Trading Profits, as defined in each Management Agreement, earned by Winton and Willowbridge for the Partnership during each calendar quarter. The Partnership is obligated to pay FORT and Northlander an incentive fee, payable annually, equal to 20% of the New Trading Profits, as defined in each Management Agreement, earned by FORT and Northlander for the Partnership during each calendar year. The Partnership is obligated to pay JSCL (prior to the JSCL Novation Agreement, John Street) an incentive fee, payable quarterly, equal to 22.5% of the New Trading Profits, as defined in its Management Agreement, earned by JSCL (prior to the JSCL Novation Agreement, John Street) for the Partnership during each calendar quarter. To the extent that the month-end Each Management Agreement may be terminated upon notice by either party. In allocating the assets of the Partnership among the Advisors, the General Partner considers, among other factors, each Advisor’s past performance, trading style, volatility of markets traded and fee requirements. The General Partner may modify or terminate the allocation of assets to the Advisors and may allocate the assets to additional advisors at any time. c. Customer Agreement: The Partnership has entered into a futures brokerage account agreement with MS&Co. (the “Partnership Customer Agreement”). Under the Partnership Customer Agreement and the foreign exchange brokerage account agreement (described in Note 1, “Organization”), the Partnership pays MS&Co. (or will reimburse MS&Co. if previously paid) its allocable share of trading fees for the clearing and, where applicable, the execution of transactions, as well as its allocable share of exchange, user, give-up 4-week 4-week d. Selling Agreement: The Partnership has entered into a selling agent agreement with Morgan Stanley Wealth Management (as amended, the “Selling Agreement”). Pursuant to the Selling Agreement, the Partnership pays Morgan Stanley Wealth Management a monthly ongoing selling agent fee. The ongoing selling agent fee is $15.00 each for futures transactions and up to an equivalent amount for swaps and $7.50 each per side for options transactions, with respect to Class A Redeemable Units. The ongoing selling agent fee for Class A Redeemable Units will not exceed 2.00% of adjusted month-end e. Harbor Selling Agreement: As of November 1, 2018, the Partnership entered into an alternative investment placement agent agreement (the “Harbor Selling Agreement”), by and among the Partnership, the General Partner, Morgan Stanley Distribution Inc. (“MSDI”), and Harbor Investment Advisory, LLC, a Maryland limited liability company (“Harbor”), which supersedes and replaces the alternative investment selling agent agreement, dated January 19, 2018, between the Partnership, the General Partner and Harbor. Pursuant to the Harbor Selling Agreement, MSDI and Harbor have been appointed as a non-exclusive sub-selling one-year month-end The General Partner fee, management fees, incentive fees and professional fees of the Partnership are allocated proportionally to each Class based on the net asset value of the Class.

Trading Activities

Trading Activities	12 Months Ended
Trading Activities	Dec. 31, 2019
Brokers and Dealers [Abstract]
Trading Activities	4. Trading Activities: The Partnership was formed for the purpose of trading contracts in a variety of commodity interests, including derivative financial instruments and derivative commodity instruments. The results of the Partnership’s trading activities are shown in the Partnership’s Statements of Income and Expenses. The Partnership also invests certain of its assets through a “master/feeder” structure. The Partnership’s pro-rata The foreign exchange brokerage account agreement and/or futures brokerage account agreements with MS&Co. give the Partnership and the Funds, respectively, the legal right to net unrealized gains and losses on open futures and forward contracts in their respective Statements of Financial Condition. The Partnership and the Funds net, for financial reporting purposes, the unrealized gains and losses on open futures and forward contracts in their respective Statements of Financial Condition, as the criteria under ASC 210-20, Balance Sheet All of the commodity interests owned directly by the Partnership are held for trading purposes. All of the commodity interests owned by the Funds are held for trading purposes. The monthly average number of futures contracts traded directly by the Partnership during the years ended December 31, 2019 and 2018 was 90,437 and 7,474, respectively. The monthly average number of metals forward contracts traded directly by the Partnership during the years ended December 31, 2019 and 2018 was 0 and 758, respectively. The monthly average notional value of currency forward contracts traded directly by the Partnership during the years ended December 31, 2019 and 2018 was $0 and $316,081,746, respectively. Trading and transaction fees are based on the number of trades executed by the Advisors and the Partnership’s percentage ownership of each respective Fund. All clearing fees paid to MS&Co. for direct trading are borne by the Partnership. In addition, clearing fees are borne by the Funds and are allocated to the limited partners/members, including the Partnership. The following tables summarize the gross and net amounts recognized relating to assets and liabilities of the Partnership’s derivatives and their offsetting subject to master netting or similar arrangements as of December 31, 2019 and 2018, respectively. Gross Amounts Amounts Gross Amounts Not Offset in the Gross Statements of Statements of Cash Collateral Amounts Financial Financial Financial Received/ December 31, 2019 Recognized Condition Condition Instruments Pledged* Net Amount Assets Futures $ 55,074,542 $ (55,074,542 ) $ - $ - $ - $ - Total assets $ 55,074,542 $ (55,074,542 ) $ - $ - $ - $ - Liabilities Futures $ (56,833,090 ) $ 55,074,542 $ (1,758,548 ) $ - $ 1,758,548 $ - Total liabilities $ (56,833,090 ) $ 55,074,542 $ (1,758,548 ) $ - $ 1,758,548 $ - Net fair value $ - * Gross Amounts Amounts Gross Amounts Not Offset in the Gross Statements of Statements of Cash Collateral Amounts Financial Financial Financial Received/ December 31, 2018 Recognized Condition Condition Instruments Pledged* Net Amount Assets Forwards $ 137,302 $ (108,245 ) $ 29,057 $ - $ - $ 29,057 Total assets $ 137,302 $ (108,245 ) $ 29,057 $ - $ - $ 29,057 Liabilities Forwards $ (108,245 ) $ 108,245 $ - $ - $ - $ - Total liabilities $ (108,245 ) $ 108,245 $ - $ - $ - $ - Net fair value $ 29,057 * * In the event of default by the Partnership, MS&Co., the Partnership’s commodity futures broker and the sole counterparty to the Partnership’s non-exchange-traded The following tables indicate the gross fair values of derivative instruments of futures and forward contracts, as applicable, held directly by the Partnership as separate assets and liabilities as of December 31, 2019 and 2018, respectively. December 31, 2019 Assets Futures Contracts Currencies $ 1,024,103 Energy 24,040,293 Grains 10,257,434 Indices 1,185,547 Interest Rates U.S. 74,820 Interest Rates Non-U.S. 598,379 Livestock 1,800,915 Metals 2,685,053 Softs 13,407,998 Total unrealized appreciation on open futures contracts 55,074,542 Liabilities Futures Contracts Currencies (194,083) Energy (15,873,184) Grains (15,052,970) Indices (712,770) Interest Rates U.S. (64,351) Interest Rates Non-U.S. (3,110,476) Livestock (1,144,175) Metals (3,295,398) Softs (17,385,683) Total unrealized depreciation on open futures contracts (56,833,090) Net unrealized depreciation on open futures contracts $ (1,758,548) * * This amount is in “Net unrealized depreciation on open futures contracts” in the Statements of Financial Condition. December 31, 2018 Assets Forward Contracts Metals $ 137,302 Total unrealized appreciation on open forward contracts 137,302 Liabilities Forward Contracts Metals (108,245) Total unrealized depreciation on open forward contracts (108,245) Net unrealized appreciation on open forward contracts $ 29,057 This amount is in “Net unrealized appreciation on open forward contracts” in the Statements of Financial Condition. The following table indicates the trading gains and losses, by market sector, on derivative instruments traded directly by the Partnership for the years ended December 31, 2019, 2018 and 2017, respectively. Sector 2019 2018 2017 Currencies $ 386,159 $ (3,364,175) $ (7,867,522) Energy 12,558,599 2,715,862 (106,263) Grains 1,109,990 (3,115,089) (4,270,109) Indices (4,261,020) (6,559,366) 29,363,266 Interest Rates U.S. (785,406) (2,158,832) (4,548,710) Interest Rates Non-U.S. 5,214,486 (631,329) (7,142,822) Livestock 2,666,962 (155,263) (902,168) Metals 115,119 (1,219,114) (404,789) Softs 1,545,386 708,983 (233,585) Total $ 18,550,275 * $ (13,778,323) * $ 3,887,298 * * This amount is included in “Total trading results” in the Statements of Income and Expenses.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
Fair Value Measurements	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	5. Fair Value Measurements: Partnership’s and the Funds’ Fair Value Measurements. The fair value of exchange-traded futures, option and forward contracts is determined by the various exchanges, and reflects the settlement price for each contract as of the close of business on the last business day of the reporting period. The fair value of foreign currency forward contracts is extrapolated on a forward basis from the spot prices quoted as of approximately 3:00 P.M. (E.T.) on the last business day of the reporting period from various exchanges. The fair value of non-exchange-traded The Partnership and the Funds consider prices for commodity futures, swap and option contracts to be based on unadjusted quoted prices in active markets for identical assets and liabilities (Level 1). The values of U.S. Treasury bills, non-exchange-traded December 31, 2019 Total Level 1 Level 2 Level 3 Assets Futures $ 55,074,542 $ 55,074,542 $ - $ - Total assets $ 55,074,542 $ 55,074,542 $ - $ - Liabilities Futures $ 56,833,090 $ 56,833,090 $ - $ - Total liabilities $ 56,833,090 $ 56,833,090 $ - $ - December 31, 2018 Total Level 1 Level 2 Level 3 Assets Forwards $ 137,302 $ - $ 137,302 $ - Total assets $ 137,302 $ - $ 137,302 $ - Liabilities Forwards $ 108,245 $ - $ 108,245 $ - Total liabilities $ 108,245 $ - $ 108,245 $ -

Investment in the Funds

Investment in the Funds	12 Months Ended
Investment in the Funds	Dec. 31, 2019
Schedule of Investments [Abstract]
Investment in the Funds	6. Investment in the Funds: On November 1, 2004, the assets allocated to Winton for trading were invested in Winton Master, a limited partnership organized under the partnership laws of the State of New York. Winton Master permits accounts managed by Winton using the Diversified Macro Strategies (formerly, the “Winton Futures Program”), a proprietary, systematic trading system, to invest together in one trading vehicle. The General Partner is also the general partner of Winton Master. Individual and pooled accounts currently managed by Winton, including the Partnership, are permitted to be limited partners of Winton Master. The General Partner and Winton believe that trading through this structure promotes efficiency and economy in the trading process. The General Partner and Winton have agreed that Winton will trade the Partnership’s assets allocated to Winton at a level that is up to 1.5 times the amount of assets allocated. On June 1, 2011, the Partnership allocated a portion of its assets to Transtrend Master, a limited liability company organized under the limited liability company laws of the State of Delaware. Transtrend Master permits accounts managed by Transtrend using the Diversified Trend Program-Enhanced Risk Profile (US Dollar), a proprietary, systematic trading system, to invest together in one trading vehicle. The General Partner is also the Trading Manager of Transtrend Master. Individual and pooled accounts managed by Transtrend, including the Partnership, are permitted to be members of Transtrend Master. The Trading Manager and Transtrend believe that trading through this structure promotes efficiency and economy in the trading process. On February 1, 2018, the assets allocated to FORT for trading were invested in FORT Contrarian Master, a limited liability company organized under the limited liability company laws of the State of Delaware. FORT Contrarian Master permits accounts managed by FORT using its Global Contrarian Trading Program, a proprietary, systematic trading system, to invest together in one trading vehicle. The General Partner is also the Trading Manager of FORT Contrarian Master. Individual and pooled accounts currently managed by FORT, including the Partnership, are permitted to be members of FORT Contrarian Master. The Trading Manager and FORT believe that trading through this structure promotes efficiency and economy in the trading process. The Trading Manager and FORT have agreed that FORT will trade the Partnership’s assets allocated to FORT at a level that is up to 1.25 times the amount of the assets allocated. On April 1, 2019, the assets allocated to Northlander for trading were invested in NL Master, a limited liability company organized under the limited liability company laws of the State of Delaware. NL Master permits accounts managed by Northlander using Northlander’s Commodity Program, a proprietary, discretionary trading system, to invest together in one trading vehicle. The General Partner is also the Trading Manager of NL Master. Individual and pooled accounts currently managed by Northlander, including the Partnership, are permitted to be members of NL Master. The Trading Manager and Northlander believe that trading through this structure promotes efficiency and economy in the trading process. On August 1, 2014, the assets allocated to Willowbridge for trading were invested in Willowbridge Master, a limited partnership organized under the partnership laws of the State of New York. The Partnership fully redeemed its investment in Willowbridge Master on January 31, 2019. The General Partner is not aware of any material changes to any of the trading programs discussed above or in Note 1, “Organization” during the year ended December 31, 2019. The Funds’ and the Partnership’s trading of futures, forward, swap and option contracts, if applicable, on commodities is done primarily on U.S. and foreign commodity exchanges. The Funds and the Partnership engage in such trading through commodity brokerage accounts maintained with MS&Co. Generally, a limited partner/member in the Funds withdraws all or part of its capital contribution and undistributed profits, if any, from the Funds as of the end of any month (the “Redemption Date”) after a request has been made to the General Partner/Trading Manager at least three days in advance of the Redemption Date. Such withdrawals are classified as a liability when the limited partner/member elects to redeem and informs the Funds. However, for all Funds other than Winton Master, a limited partner/member may request a withdrawal as of the end of any day if such request is received by the General Partner/Trading Manager at least three days in advance of the proposed withdrawal day. Management fees, ongoing selling agent fees, the General Partner fee and incentive fees are charged at the Partnership level, except for management and incentive fees payable to Transtrend, which are charged at the Transtrend Master level. Clearing fees are borne by the Funds and allocated to the Funds’ limited partners/non-managing At December 31, 2019, the Partnership owned approximately 37.5% of Winton Master, 100.0% of Transtrend Master, 89.1% of FORT Contrarian Master and 79.6% of NL Master. At December 31, 2018, the Partnership owned approximately 45.1% of Winton Master, 99.2% of Transtrend Master, 100.0% of Willowbridge Master and 87.3% of FORT Contrarian Master. It is the Partnership’s intention to continue to invest in the Funds. The performance of the Partnership is directly affected by the performance of the Funds. Expenses to limited partners as a result of investment in the Funds are approximately the same as they would be if the Partnership traded directly and redemption rights are not affected. Summarized information reflecting the total assets, liabilities and partners’/members’ capital of the Funds is shown in the following tables: December 31, 2019 Total Assets Total Liabilities Total Capital Winton Master $ 214,355,792 $ 8,953,183 $ 205,402,609 Transtrend Master 127,400,612 7,792,364 119,608,248 FORT Contrarian Master 135,604,970 4,607,083 130,997,887 NL Master 22,919,671 1,217,801 21,701,870 December 31, 2018 Total Assets Total Liabilities Total Capital Winton Master $ 352,978,637 $ 13,779,023 $ 339,199,614 Transtrend Master 150,331,839 533,135 149,798,704 Willowbridge Master 192,211,165 43,829,178 148,381,987 FORT Contrarian Master 180,042,210 1,648,773 178,393,437 Summarized information reflecting the net investment income (loss), total trading results and net income (loss) of the Funds is shown in the following tables: For the year ended December 31, 2019 Net Investment Total Trading Net Income Winton Master $ 4,752,237 $ 8,615,176 $ 13,367,413 Transtrend Master (154,306 ) 6,337,549 6,183,243 Willowbridge Master (a) 220,431 (759,939 ) (539,508 ) FORT Contrarian Master 2,602,136 34,257,304 36,859,440 NL Master (b) 152,833 (6,328,890) (6,176,057 ) For the year ended December 31, 2018 Net Investment Total Trading Net Income Winton Master $ 5,588,690 $ (7,829,505) $ (2,240,815) Transtrend Master (299,102 ) (17,683,526) (17,982,628) Willowbridge Master 906,473 (4,843,521) (3,937,048) FORT Contrarian Master (c) 2,172,289 (12,008,806) (9,836,517) (a) From January 1, 2019 through January 31, 2019, the date Willowbridge Master terminated operations. (b) From April 1, 2019, commencement of operations for NL Master, through December 31, 2019. (c) Summarized information presented is for the twelve months ended December 31, 2018. The Partnership was invested in Fort Contrarian Master from February 1, 2018 to December 31, 2018. Summarized information reflecting the Partnership’s investments in and the Partnership’s pro-rata December 31, 2019 For the year ended December 31, 2019 % of Expenses Net Funds Partners’ Fair Value Income (Loss) Clearing Fees Professional Management Incentive Income (Loss) Investment Redemptions Winton Master 15.96 % $ 77,128,248 $ 3,832,573 $ 159,802 $ 24,788 $ - $ - $ 3,647,983 Commodity Portfolio Monthly Transtrend Master 24.75 % 119,608,248 8,171,983 955,013 67,742 1,185,744 1,815 5,961,669 Commodity Portfolio Monthly Willowbridge Master (a) - % - (394,257 ) 84,076 5,077 - - (483,410 ) Commodity Portfolio Monthly FORT Contrarian Master 24.19 % 116,899,563 31,990,597 407,231 58,882 - - 31,524,484 Commodity Portfolio Monthly NL Master (b) 3.58 % 17,300,752 (4,699,673 ) 64,924 49,260 - - (4,813,857 ) Commodity Portfolio Monthly Total $ 330,936,811 $ 38,901,223 $ 1,671,046 $ 205,749 $ 1,185,744 $ 1,815 $ 35,836,869 December 31, 2018 For the year ended December 31, 2018 % of Expenses Net Funds Partners’ Fair Value Income (Loss) Clearing Fees Professional Management Incentive Income (Loss) Investment Redemptions Winton Master 25.30 % $ 153,304,033 $ 241,406 $ 214,137 $ 30,606 $ - $ - $ (3,337 ) Commodity Portfolio Monthly Transtrend Master 24.51 % 148,573,425 (15,288,450 ) 1,039,887 274 1,449,384 47,039 (17,825,034 ) Commodity Portfolio Monthly Willowbridge Master 24.53 % 148,663,921 (825,674 ) 2,381,900 64,577 - - (3,272,151 ) Commodity Portfolio Monthly FORT Contrarian Master (c) 25.75 % 156,038,134 (7,949,280 ) 398,224 52,933 - - (8,400,437 ) Commodity Portfolio Monthly Total $ 606,579,513 $ (23,821,998 ) $ 4,034,148 $ 148,390 $ 1,449,384 $ 47,039 $ (29,500,959 ) (a) From January 1, 2019 through January 31, 2019, the date the Partnership fully redeemed its investment in Willowbridge Master. (b) From April 1, 2019, the date the Partnership invested into NL Master, through December 31, 2019. (c) From February 1, 2018, the date the Partnership invested into FORT Contrarian Master, through December 31, 2018.

Subscriptions, Distributions an

Subscriptions, Distributions and Redemptions	12 Months Ended
Subscriptions, Distributions and Redemptions	Dec. 31, 2019
Equity [Abstract]
Subscriptions, Distributions and Redemptions	7. Subscriptions, Distributions and Redemptions: Subscriptions are accepted monthly from investors who become limited partners on the first day of the month after their subscriptions are processed. Distributions are made on a pro-rata

Financial Highlights

Financial Highlights	12 Months Ended
Financial Highlights	Dec. 31, 2019
Investment Company [Abstract]
Financial Highlights	8. Financial Highlights: Financial highlights for the limited partner Classes as a whole for the years ended December 31, 2019, 2018 and 2017 were as follows: 2019 2018 2017 Class A Class Z Class A Class Z Class A Class Z Per Redeemable Unit Performance (for a unit outstanding throughout the year):* Net realized and unrealized gains (losses) $ 243.15 $ 96.46 $ (192.42) $ (75.81) $ 7.10 $ 3.30 Net investment loss (122.35) (24.51) (86.93) (12.94) (102.28) (20.47) Increase (decrease) for the year 120.80 71.95 (279.35) (88.75) (95.18) (17.17) Net asset value per Redeemable Unit, beginning of year 2,608.11 1,034.06 2,887.46 1,122.81 2,982.64 1,139.98 Net asset value per Redeemable Unit, end of year $ 2,728.91 $ 1,106.01 $ 2,608.11 $ 1,034.06 $ 2,887.46 $ 1,122.81 2019 2018 2017 Class A Class Z Class A Class Z Class A Class Z Ratios to Average Limited Partners’ Capital: Net investment loss (4.5) % (2.3) % (3.2) % (1.2) % (3.6) % (1.9) % Operating expense 5.8 % 3.6 % 4.8 % 2.9 % 4.4 % 2.7 % Incentive fees 0.5 % 0.4 % 0.0 %* 0.0 %* 0.0 %* 0.0 %* Total expenses 6.3 % 4.0 % 4.8 % 2.9 % 4.4 % 2.7 % Total return: Total return before incentive fees 5.2 % 7.4 % (9.7) % (7.9) % (3.2) % (1.5) % Incentive fees (0.6) % (0.4) % (0.0) %* (0.0) %* (0.0) %* (0.0) %*** Total return after incentive fees 4.6 % 7.0 % (9.7) % (7.9) % (3.2) % (1.5) % * Net investment loss per Redeemable Unit is calculated by dividing the interest income less total expenses by the average number of Redeemable Units outstanding during the period. The net realized and unrealized gains (losses) per Redeemable Unit is a balancing amount necessary to reconcile the change in net asset value per Redeemable Unit with the other per unit information. Interest income less total expenses. * Due to rounding. The above ratios and total return may vary for individual investors based on the timing of capital transactions during the period. Additionally, these ratios are calculated for the limited partner Classes using the limited partners’ share of income, expenses and average partners’ capital of the Partnership and include the income and expenses allocated from the Funds.

Financial Instrument Risks

Financial Instrument Risks	12 Months Ended
Financial Instrument Risks	Dec. 31, 2019
Investments, All Other Investments [Abstract]
Financial Instrument Risks	9. Financial Instrument Risks: In the normal course of business, the Partnership and the Funds are parties to financial instruments with off-balance-sheet over-the-counter Futures Contracts. Forward Foreign Currency Contracts. London Metal Exchange Forward Contracts. Options marked-to-market marked-to-market As both a buyer and seller of options, the Partnership/Funds pay or receive a premium at the outset and then bear the risk of unfavorable changes in the price of the contract underlying the option. Written options expose the Partnership/Funds to potentially unlimited liability; for purchased options, the risk of loss is limited to the premiums paid. Certain written put options permit cash settlement and do not require the option holder to own the reference asset. The Partnership/Funds do not consider these contracts to be guarantees. Futures-Style Options. Market risk is the potential for changes in the value of the financial instruments traded by the Partnership/Funds due to market changes, including interest and foreign exchange rate movements and fluctuations in commodity or security prices. Market risk is directly impacted by the volatility and liquidity in the markets in which the related underlying assets are traded. The Partnership and the Funds are exposed to market risk equal to the value of the futures and forward contracts held and unlimited liability on such contracts sold short. Credit risk is the possibility that a loss may occur due to the failure of a counterparty to perform according to the terms of a contract. The Partnership’s/Funds’ risk of loss in the event of a counterparty default is typically limited to the amounts recognized in the Partnership’s/Funds’ Statements of Financial Condition and is not represented by the contract or notional amounts of the instruments. The Partnership’s/Funds’ risk of loss is reduced through the use of legally enforceable master netting agreements with counterparties that permit the Partnership/Funds to offset unrealized gains and losses and other assets and liabilities with such counterparties upon the occurrence of certain events. The Partnership/Funds have credit risk and concentration risk as MS&Co. or an MS&Co. affiliate are counterparties or brokers with respect to the Partnership’s and the Funds’ assets. For certain OTC contracts traded by certain Funds, JPMorgan is the counterparty with respect to those assets. Credit risk with respect to exchange-traded instruments is reduced to the extent that, through MS&Co. or an MS&Co. affiliate, the Partnership’s/Funds’ counterparty is an exchange or clearing organization. The General Partner/Trading Manager monitors and attempts to mitigate the Partnership’s/Funds’ risk exposure on a daily basis through financial, credit and risk management monitoring systems, and accordingly, believes that it has effective procedures for evaluating and limiting the credit and market risks to which the Partnership/Funds may be subject. These monitoring systems generally allow the General Partner/Trading Manager to statistically analyze actual trading results with risk-adjusted performance indicators and correlation statistics. In addition, online monitoring systems provide account analysis of futures, exchange-cleared swaps, forward and option contracts by sector, margin requirements, gain and loss transactions and collateral positions. The majority of these financial instruments mature within one year of the inception date. However, due to the nature of the Partnership’s/Funds’ business, these instruments may not be held to maturity. The risk to the limited partners that have purchased Redeemable Units is limited to the amount of their share of the Partnership’s net assets and undistributed profits. This limited liability is a result of the organization of the Partnership as a limited partnership under New York law. In the ordinary course of business, the Partnership/Funds enter into contracts and agreements that contain various representations and warranties and which provide general indemnifications. The Partnership’s/Funds’ maximum exposure under these arrangements cannot be determined, as this could include future claims that have not yet been made against the Partnership/Funds. The General Partner/Trading Manager considers the risk of any future obligation relating to these indemnifications to be remote.

Subsequent Events

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	10. Subsequent Events: The General Partner evaluates events that occur after the balance sheet date but before and up until financial statements are available to be issued. The General Partner has assessed the subsequent events through the date the financial statements were issued and has determined that, other than disclosed below, there were no subsequent events requiring adjustment to or disclosure in the financial statements. Effective on or about February 1, 2020, the Partnership allocated a portion of its assets to Pan Capital Management L.P. (“Pan”), which is managed and traded by Pan pursuant to Pan’s Energy Trading Program.

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates.
Profit Allocation	Profit Allocation
Statement of Cash Flows	Statement of Cash Flows “Statement of Cash Flows.”
Partnership's Investment in the Funds	Partnership’s Investment in the Funds.
Partnership's/Funds' Derivative Investments	Partnership’s/Funds’ Derivative Investments. first-in, first-out The Partnership and the Funds do not isolate the portion of the results of operations arising from the effect of changes in foreign exchange rates on investments from fluctuations due to changes in market prices of investments held. Such fluctuations are included in total trading results in the Partnership’s/Funds’ Statements of Income and Expenses.
Partnership's Cash	Partnership’s Cash.
Income Taxes	Income Taxes “Income Taxes,” “more-likely-than-not” more-likely-than-not
Investment Company Status	Investment Company Status. 2013-08 “Financial Services—Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements”
Net Income (Loss) Per Redeemable Unit	Net Income (Loss) Per Redeemable Unit. “Financial Services - Investment Companies.”

Trading Activities (Tables)

Trading Activities (Tables)	12 Months Ended
Trading Activities (Tables)	Dec. 31, 2019
Brokers and Dealers [Abstract]
Summary of Gross and Net Amounts Recognized Relating to Assets and Liabilities of Partnership's Derivatives	The following tables summarize the gross and net amounts recognized relating to assets and liabilities of the Partnership’s derivatives and their offsetting subject to master netting or similar arrangements as of December 31, 2019 and 2018, respectively. Gross Amounts Amounts Gross Amounts Not Offset in the Gross Statements of Statements of Cash Collateral Amounts Financial Financial Financial Received/ December 31, 2019 Recognized Condition Condition Instruments Pledged* Net Amount Assets Futures $ 55,074,542 $ (55,074,542 ) $ - $ - $ - $ - Total assets $ 55,074,542 $ (55,074,542 ) $ - $ - $ - $ - Liabilities Futures $ (56,833,090 ) $ 55,074,542 $ (1,758,548 ) $ - $ 1,758,548 $ - Total liabilities $ (56,833,090 ) $ 55,074,542 $ (1,758,548 ) $ - $ 1,758,548 $ - Net fair value $ - * Gross Amounts Amounts Gross Amounts Not Offset in the Gross Statements of Statements of Cash Collateral Amounts Financial Financial Financial Received/ December 31, 2018 Recognized Condition Condition Instruments Pledged* Net Amount Assets Forwards $ 137,302 $ (108,245 ) $ 29,057 $ - $ - $ 29,057 Total assets $ 137,302 $ (108,245 ) $ 29,057 $ - $ - $ 29,057 Liabilities Forwards $ (108,245 ) $ 108,245 $ - $ - $ - $ - Total liabilities $ (108,245 ) $ 108,245 $ - $ - $ - $ - Net fair value $ 29,057 * * In the event of default by the Partnership, MS&Co., the Partnership’s commodity futures broker and the sole counterparty to the Partnership’s non-exchange-traded
Gross Fair Values of Derivative Instruments of Futures and Forward Contracts Traded	The following tables indicate the gross fair values of derivative instruments of futures and forward contracts, as applicable, held directly by the Partnership as separate assets and liabilities as of December 31, 2019 and 2018, respectively. December 31, 2019 Assets Futures Contracts Currencies $ 1,024,103 Energy 24,040,293 Grains 10,257,434 Indices 1,185,547 Interest Rates U.S. 74,820 Interest Rates Non-U.S. 598,379 Livestock 1,800,915 Metals 2,685,053 Softs 13,407,998 Total unrealized appreciation on open futures contracts 55,074,542 Liabilities Futures Contracts Currencies (194,083) Energy (15,873,184) Grains (15,052,970) Indices (712,770) Interest Rates U.S. (64,351) Interest Rates Non-U.S. (3,110,476) Livestock (1,144,175) Metals (3,295,398) Softs (17,385,683) Total unrealized depreciation on open futures contracts (56,833,090) Net unrealized depreciation on open futures contracts $ (1,758,548) * * This amount is in “Net unrealized depreciation on open futures contracts” in the Statements of Financial Condition. December 31, 2018 Assets Forward Contracts Metals $ 137,302 Total unrealized appreciation on open forward contracts 137,302 Liabilities Forward Contracts Metals (108,245) Total unrealized depreciation on open forward contracts (108,245) Net unrealized appreciation on open forward contracts $ 29,057 This amount is in “Net unrealized appreciation on open forward contracts” in the Statements of Financial Condition.
Trading Gains and Losses by Market Sector on Derivative Instruments Traded	The following table indicates the trading gains and losses, by market sector, on derivative instruments traded directly by the Partnership for the years ended December 31, 2019, 2018 and 2017, respectively. Sector 2019 2018 2017 Currencies $ 386,159 $ (3,364,175) $ (7,867,522) Energy 12,558,599 2,715,862 (106,263) Grains 1,109,990 (3,115,089) (4,270,109) Indices (4,261,020) (6,559,366) 29,363,266 Interest Rates U.S. (785,406) (2,158,832) (4,548,710) Interest Rates Non-U.S. 5,214,486 (631,329) (7,142,822) Livestock 2,666,962 (155,263) (902,168) Metals 115,119 (1,219,114) (404,789) Softs 1,545,386 708,983 (233,585) Total $ 18,550,275 * $ (13,778,323) * $ 3,887,298 * * This amount is included in “Total trading results” in the Statements of Income and Expenses.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
Fair Value Measurements (Tables)	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value	December 31, 2019 Total Level 1 Level 2 Level 3 Assets Futures $ 55,074,542 $ 55,074,542 $ - $ - Total assets $ 55,074,542 $ 55,074,542 $ - $ - Liabilities Futures $ 56,833,090 $ 56,833,090 $ - $ - Total liabilities $ 56,833,090 $ 56,833,090 $ - $ -

Investment in the Funds (Tables

Investment in the Funds (Tables)	12 Months Ended
Investment in the Funds (Tables)	Dec. 31, 2019
Schedule of Investments [Abstract]
Assets, Liabilities and Partners' Members' Capital of Funds	Summarized information reflecting the total assets, liabilities and partners’/members’ capital of the Funds is shown in the following tables: December 31, 2019 Total Assets Total Liabilities Total Capital Winton Master $ 214,355,792 $ 8,953,183 $ 205,402,609 Transtrend Master 127,400,612 7,792,364 119,608,248 FORT Contrarian Master 135,604,970 4,607,083 130,997,887 NL Master 22,919,671 1,217,801 21,701,870 December 31, 2018 Total Assets Total Liabilities Total Capital Winton Master $ 352,978,637 $ 13,779,023 $ 339,199,614 Transtrend Master 150,331,839 533,135 149,798,704 Willowbridge Master 192,211,165 43,829,178 148,381,987 FORT Contrarian Master 180,042,210 1,648,773 178,393,437
Net Investment Income (Loss), Trading Results and Net Income (Loss) of Funds	Summarized information reflecting the net investment income (loss), total trading results and net income (loss) of the Funds is shown in the following tables: For the year ended December 31, 2019 Net Investment Total Trading Net Income Winton Master $ 4,752,237 $ 8,615,176 $ 13,367,413 Transtrend Master (154,306 ) 6,337,549 6,183,243 Willowbridge Master (a) 220,431 (759,939 ) (539,508 ) FORT Contrarian Master 2,602,136 34,257,304 36,859,440 NL Master (b) 152,833 (6,328,890) (6,176,057 ) For the year ended December 31, 2018 Net Investment Total Trading Net Income Winton Master $ 5,588,690 $ (7,829,505) $ (2,240,815) Transtrend Master (299,102 ) (17,683,526) (17,982,628) Willowbridge Master 906,473 (4,843,521) (3,937,048) FORT Contrarian Master (c) 2,172,289 (12,008,806) (9,836,517) (a) From January 1, 2019 through January 31, 2019, the date Willowbridge Master terminated operations. (b) From April 1, 2019, commencement of operations for NL Master, through December 31, 2019. (c) Summarized information presented is for the twelve months ended December 31, 2018. The Partnership was invested in Fort Contrarian Master from February 1, 2018 to December 31, 2018.
Partnership's Investments in, and Partnership's Pro Rata Share of Results of Operations of Funds	Summarized information reflecting the Partnership’s investments in and the Partnership’s pro-rata December 31, 2019 For the year ended December 31, 2019 % of Expenses Net Funds Partners’ Fair Value Income (Loss) Clearing Fees Professional Management Incentive Income (Loss) Investment Redemptions Winton Master 15.96 % $ 77,128,248 $ 3,832,573 $ 159,802 $ 24,788 $ - $ - $ 3,647,983 Commodity Portfolio Monthly Transtrend Master 24.75 % 119,608,248 8,171,983 955,013 67,742 1,185,744 1,815 5,961,669 Commodity Portfolio Monthly Willowbridge Master (a) - % - (394,257 ) 84,076 5,077 - - (483,410 ) Commodity Portfolio Monthly FORT Contrarian Master 24.19 % 116,899,563 31,990,597 407,231 58,882 - - 31,524,484 Commodity Portfolio Monthly NL Master (b) 3.58 % 17,300,752 (4,699,673 ) 64,924 49,260 - - (4,813,857 ) Commodity Portfolio Monthly Total $ 330,936,811 $ 38,901,223 $ 1,671,046 $ 205,749 $ 1,185,744 $ 1,815 $ 35,836,869 December 31, 2018 For the year ended December 31, 2018 % of Expenses Net Funds Partners’ Fair Value Income (Loss) Clearing Fees Professional Management Incentive Income (Loss) Investment Redemptions Winton Master 25.30 % $ 153,304,033 $ 241,406 $ 214,137 $ 30,606 $ - $ - $ (3,337 ) Commodity Portfolio Monthly Transtrend Master 24.51 % 148,573,425 (15,288,450 ) 1,039,887 274 1,449,384 47,039 (17,825,034 ) Commodity Portfolio Monthly Willowbridge Master 24.53 % 148,663,921 (825,674 ) 2,381,900 64,577 - - (3,272,151 ) Commodity Portfolio Monthly FORT Contrarian Master (c) 25.75 % 156,038,134 (7,949,280 ) 398,224 52,933 - - (8,400,437 ) Commodity Portfolio Monthly Total $ 606,579,513 $ (23,821,998 ) $ 4,034,148 $ 148,390 $ 1,449,384 $ 47,039 $ (29,500,959 ) (a) From January 1, 2019 through January 31, 2019, the date the Partnership fully redeemed its investment in Willowbridge Master. (b) From April 1, 2019, the date the Partnership invested into NL Master, through December 31, 2019. (c) From February 1, 2018, the date the Partnership invested into FORT Contrarian Master, through December 31, 2018.

Financial Highlights (Tables)

Financial Highlights (Tables)	12 Months Ended
Financial Highlights (Tables)	Dec. 31, 2019
Investment Company [Abstract]
Financial Highlights	Financial highlights for the limited partner Classes as a whole for the years ended December 31, 2019, 2018 and 2017 were as follows: 2019 2018 2017 Class A Class Z Class A Class Z Class A Class Z Per Redeemable Unit Performance (for a unit outstanding throughout the year):* Net realized and unrealized gains (losses) $ 243.15 $ 96.46 $ (192.42) $ (75.81) $ 7.10 $ 3.30 Net investment loss (122.35) (24.51) (86.93) (12.94) (102.28) (20.47) Increase (decrease) for the year 120.80 71.95 (279.35) (88.75) (95.18) (17.17) Net asset value per Redeemable Unit, beginning of year 2,608.11 1,034.06 2,887.46 1,122.81 2,982.64 1,139.98 Net asset value per Redeemable Unit, end of year $ 2,728.91 $ 1,106.01 $ 2,608.11 $ 1,034.06 $ 2,887.46 $ 1,122.81 2019 2018 2017 Class A Class Z Class A Class Z Class A Class Z Ratios to Average Limited Partners’ Capital: Net investment loss (4.5) % (2.3) % (3.2) % (1.2) % (3.6) % (1.9) % Operating expense 5.8 % 3.6 % 4.8 % 2.9 % 4.4 % 2.7 % Incentive fees 0.5 % 0.4 % 0.0 %* 0.0 %* 0.0 %* 0.0 %* Total expenses 6.3 % 4.0 % 4.8 % 2.9 % 4.4 % 2.7 % Total return: Total return before incentive fees 5.2 % 7.4 % (9.7) % (7.9) % (3.2) % (1.5) % Incentive fees (0.6) % (0.4) % (0.0) %* (0.0) %* (0.0) %* (0.0) %*** Total return after incentive fees 4.6 % 7.0 % (9.7) % (7.9) % (3.2) % (1.5) % * Net investment loss per Redeemable Unit is calculated by dividing the interest income less total expenses by the average number of Redeemable Units outstanding during the period. The net realized and unrealized gains (losses) per Redeemable Unit is a balancing amount necessary to reconcile the change in net asset value per Redeemable Unit with the other per unit information. Interest income less total expenses. * Due to rounding.

Organization - Additional Infor

Organization - Additional Information (Detail)	12 Months Ended
Organization - Additional Information (Detail)	Dec. 31, 2019USD ($)$ / sharesshares
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Maximum number of Redeemable Units sold by the Partnership \| shares	0
Maximum [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage of partnership assets allocated	10.00%
Minimum [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Net asset value per unit liquidation circumstance \| $ / shares	$ 400
Aggregate net assets of partnership liquidation threshold circumstance \| $	$ 1,000,000
Partnership liquidation date circumstance	Dec. 31, 2055

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Cash denominated in foreign currencies	$ 10,541,351	$ 0
Cash denominated in foreign currencies, cost	10,423,551
Uncertain tax position	$ 0
Open tax year	2016 2017 2018 2019

Agreements - Additional Informa

Agreements - Additional Information (Detail)	Mar. 31, 2019	Feb. 01, 2019	Nov. 01, 2018$ / Round_Turn_Trade$ / Half_Turn_Trade	Dec. 31, 2016USD ($)	Dec. 31, 2015	Mar. 31, 2018	Jun. 30, 2019	Jan. 31, 2019	Dec. 31, 2019USD ($)$ / Round_Turn_Trade$ / Half_Turn_Trade	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Investment [Line Items]
Percentage of General Partner fee									0.75%
Cash held for restricted cash requirements									$ 44,439,575	$ 0
Net assets				$ 997,913,751					$ 483,271,251	606,058,475	$ 798,532,927
CMF FORT Contrarian Master Fund LLC [Member]
Investment [Line Items]
Percentage of management fee									1.15%
Incentive fee, quarterly trading profits basis									20.00%
Net assets									$ 130,997,887	178,393,437
CMF Winton Master L.P. [Member]
Investment [Line Items]
Percentage of management fee									1.50%
Incentive fee, quarterly trading profits basis									20.00%
Net assets									$ 205,402,609	339,199,614
CMF Willowbridge Master Fund L.P.[Member]
Investment [Line Items]
Percentage of management fee	1.50%					1.50%		1.25%	1.25%
Incentive fee, quarterly trading profits basis									20.00%
Net assets										148,381,987
Systematica Investments Limited [Member]
Investment [Line Items]
Percentage of management fee									1.00%
Incentive fee, quarterly trading profits basis					20.00%				20.00%
CMF TT II, LLC [Member]
Investment [Line Items]
Percentage of management fee				1.00%					0.85%
Incentive fee, quarterly trading profits basis									20.00%
Percentage of allocable share									100.00%
U.S. Treasury bill maturity period									28 years
U.S. Treasury bill discount rate									0.15%
Net assets									$ 119,608,248	149,798,704
MS&Co. [Member]
Investment [Line Items]
Percentage of allocable share									100.00%
Cash held for restricted cash requirements									$ 44,439,575	0
John Street Capital LLP [Member]
Investment [Line Items]
Percentage of management fee		1.35%							1.50%
Incentive fee, quarterly trading profits basis							22.50%		20.00%
John Street Capital LLP [Member] \| Maximum [Member]
Investment [Line Items]
Net assets									$ 80,000,000
Class A Redeemable Units [Member] \| Morgan Stanley Wealth Management [Member]
Investment [Line Items]
Brokerage commission payable per round-turn \| $ / Round_Turn_Trade									15
Brokerage commission payable per half turn \| $ / Half_Turn_Trade									7.50
Class A Redeemable Units [Member]
Investment [Line Items]
Net assets				$ 983,754,958					$ 472,470,787	$ 595,031,425	$ 785,537,773
Class A Redeemable Units [Member] \| Morgan Stanley Distribution Inc [Member] \| Harbor Selling Agreement [Member]
Investment [Line Items]
Brokerage commission payable per round-turn \| $ / Round_Turn_Trade			15
Brokerage commission payable per half turn \| $ / Half_Turn_Trade			7.50

Trading Activities - Additional

Trading Activities - Additional Information (Detail)	12 Months Ended
Trading Activities - Additional Information (Detail)	Dec. 31, 2019USD ($)Contracts	Dec. 31, 2018USD ($)Contracts
Futures Contracts [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Average number of derivative contracts traded	90,437	7,474
Forward Contracts [Member] \| Metals [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Average number of derivative contracts traded	0	758
Forward Contracts [Member] \| Currencies [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Average number of derivative contracts traded \| $	$ 0	$ 316,081,746

Trading Activities - Summary of

Trading Activities - Summary of Gross and Net Amounts Recognized Relating to Assets and Liabilities of Partnership's Derivatives (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Gross Amounts Recognized, Assets	$ 55,074,542	$ 137,302
Gross Amounts Offset in the Statements of Financial Condition, Assets	(55,074,542)	(108,245)
Amounts Presented in the Statements of Financial Condition, Assets	0	29,057
Financial Instruments, Assets	0
Net Amount, Assets	0	29,057
Gross Amounts Recognized, Liabilities	(56,833,090)	(108,245)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	55,074,542	108,245
Amounts Presented in the Statements of Financial Condition, Liabilities	(1,758,548)
Financial Instruments, Liabilities	0
Cash Collateral Received/Pledged, Liabilities	1,758,548
Net Amount, Liabilities	0
Net fair value	0	29,057
Futures Contracts [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	55,074,542
Gross Amounts Offset in the Statements of Financial Condition, Assets	(55,074,542)
Amounts Presented in the Statements of Financial Condition, Assets	0
Financial Instruments, Assets	0
Net Amount, Assets	0
Gross Amounts Recognized, Liabilities	(56,833,090)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	55,074,542
Amounts Presented in the Statements of Financial Condition, Liabilities	(1,758,548)	0
Financial Instruments, Liabilities	0
Cash Collateral Received/Pledged, Liabilities	1,758,548
Net Amount, Liabilities	0
Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets		137,302
Gross Amounts Offset in the Statements of Financial Condition, Assets		(108,245)
Amounts Presented in the Statements of Financial Condition, Assets	$ 0	29,057
Net Amount, Assets		29,057
Gross Amounts Recognized, Liabilities		(108,245)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities		$ 108,245

Trading Activities - Gross Fair

Trading Activities - Gross Fair Values of Derivative Instruments of Futures and Forward Contracts Traded (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	$ 55,074,542
Total unrealized depreciation on open contracts	(56,833,090)
Net unrealized depreciation on open futures contracts	(1,758,548)
Currencies [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	1,024,103
Total unrealized depreciation on open contracts	(194,083)
Energy [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	24,040,293
Total unrealized depreciation on open contracts	(15,873,184)
Grains [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	10,257,434
Total unrealized depreciation on open contracts	(15,052,970)
Indices [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	1,185,547
Total unrealized depreciation on open contracts	(712,770)
Interest Rates U.S. [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	74,820
Total unrealized depreciation on open contracts	(64,351)
Interest Rates Non-U.S. [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	598,379
Total unrealized depreciation on open contracts	(3,110,476)
Livestock [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	1,800,915
Total unrealized depreciation on open contracts	(1,144,175)
Metals [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	2,685,053
Total unrealized depreciation on open contracts	(3,295,398)
Softs [Member] \| Futures Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	13,407,998
Total unrealized depreciation on open contracts	$ (17,385,683)
Forward Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts		$ 137,302
Total unrealized depreciation on open contracts		(108,245)
Net unrealized depreciation on open futures contracts		29,057
Forward Contracts [Member] \| Metals [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts		137,302
Total unrealized depreciation on open contracts		$ (108,245)

Trading Activities - Trading Ga

Trading Activities - Trading Gains and Losses by Market Sector on Derivative Instruments Traded (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Total trading results	$ 18,550,275	$ (13,778,323)	$ 3,887,298
Currencies [Member]
Derivative [Line Items]
Total trading results	386,159	(3,364,175)	(7,867,522)
Energy [Member]
Derivative [Line Items]
Total trading results	12,558,599	2,715,862	(106,263)
Grains [Member]
Derivative [Line Items]
Total trading results	1,109,990	(3,115,089)	(4,270,109)
Indices [Member]
Derivative [Line Items]
Total trading results	(4,261,020)	(6,559,366)	29,363,266
Interest Rates U.S. [Member]
Derivative [Line Items]
Total trading results	(785,406)	(2,158,832)	(4,548,710)
Interest Rates Non-U.S. [Member]
Derivative [Line Items]
Total trading results	5,214,486	(631,329)	(7,142,822)
Livestock [Member]
Derivative [Line Items]
Total trading results	2,666,962	(155,263)	(902,168)
Metals [Member]
Derivative [Line Items]
Total trading results	115,119	(1,219,114)	(404,789)
Softs [Member]
Derivative [Line Items]
Total trading results	$ 1,545,386	$ 708,983	$ (233,585)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - DerivativeInstrument	Dec. 31, 2019	Dec. 31, 2018
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative instruments held	0	0

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Assets
Total assets	$ 55,074,542	$ 137,302
Liabilities
Total liabilities	56,833,090	108,245
Futures Contracts [Member]
Assets
Total assets	55,074,542
Liabilities
Total liabilities	56,833,090
Forward Contracts [Member]
Assets
Total assets		137,302
Liabilities
Total liabilities		108,245
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) [Member]
Assets
Total assets	55,074,542
Liabilities
Total liabilities	56,833,090
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) [Member] \| Futures Contracts [Member]
Assets
Total assets	55,074,542
Liabilities
Total liabilities	56,833,090
Significant Other Observable Inputs (Level 2) [Member]
Assets
Total assets	0	137,302
Liabilities
Total liabilities	0	108,245
Significant Other Observable Inputs (Level 2) [Member] \| Futures Contracts [Member]
Assets
Total assets	0
Liabilities
Total liabilities	0
Significant Other Observable Inputs (Level 2) [Member] \| Forward Contracts [Member]
Assets
Total assets		137,302
Liabilities
Total liabilities		$ 108,245
Fair Value, Inputs, Level 3 [Member]
Assets
Total assets	0
Liabilities
Total liabilities	0
Fair Value, Inputs, Level 3 [Member] \| Futures Contracts [Member]
Assets
Total assets	0
Liabilities
Total liabilities	$ 0

Investment in the Funds - Addit

Investment in the Funds - Additional Information (Detail)	12 Months Ended
Investment in the Funds - Additional Information (Detail)	Dec. 31, 2019	Dec. 31, 2018
CMF Winton Master L.P. [Member]
Investment [Line Items]
Percentage owned by partnership	37.50%	45.10%
CMF Winton Master L.P. [Member] \| Maximum [Member]
Investment [Line Items]
Maximum amount of partnership assets allocated to trading advisor	1.5
CMF TT II, LLC [Member]
Investment [Line Items]
Percentage owned by partnership	100.00%	99.20%
CMF Willowbridge Master Fund L.P.[Member]
Investment [Line Items]
Percentage owned by partnership	89.10%	100.00%
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
CMF NL Master Fund LLC [Member]
Investment [Line Items]
Percentage owned by partnership	79.60%

Investment in the Funds - Asset

Investment in the Funds - Assets, Liabilities and Partners' Members' Capital of Funds (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
Total Assets	$ 504,390,236	$ 623,296,907
Total Liabilities	21,118,985	17,238,432
Total Capital	483,271,251	606,058,475	$ 798,532,927	$ 997,913,751
CMF Winton Master L.P. [Member]
Investment Holdings [Line Items]
Total Assets	214,355,792	352,978,637
Total Liabilities	8,953,183	13,779,023
Total Capital	205,402,609	339,199,614
CMF TT II, LLC [Member]
Investment Holdings [Line Items]
Total Assets	127,400,612	150,331,839
Total Liabilities	7,792,364	533,135
Total Capital	119,608,248	149,798,704
CMF Willowbridge Master Fund L.P.[Member]
Investment Holdings [Line Items]
Total Assets		192,211,165
Total Liabilities		43,829,178
Total Capital		148,381,987
CMF FORT Contrarian Master Fund LLC [Member]
Investment Holdings [Line Items]
Total Assets	135,604,970	180,042,210
Total Liabilities	4,607,083	1,648,773
Total Capital	130,997,887	$ 178,393,437
CMF NL Master Fund LLC [Member]
Investment Holdings [Line Items]
Total Assets	22,919,671
Total Liabilities	1,217,801
Total Capital	$ 21,701,870

Investment in the Funds - Net I

Investment in the Funds - Net Investment Income (Loss), Trading Results and Net Income (Loss) for Funds (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investment Holdings [Line Items]
Net Investment Income (Loss)	$ (24,358,274)	$ (22,373,870)	$ (31,400,195)
Total trading results	50,049,263	(48,172,549)	(1,840,380)
Net income (loss)	25,690,989	(70,546,419)	$ (33,240,575)
CMF Winton Master L.P. [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	4,752,237	5,588,690
Total trading results	8,615,176	(7,829,505)
Net income (loss)	13,367,413	(2,240,815)
CMF TT II, LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	(154,306)	(299,102)
Total trading results	6,337,549	(17,683,526)
Net income (loss)	6,183,243	(17,982,628)
CMF Willowbridge Master Fund L.P.[Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	220,431	906,473
Total trading results	(759,939)	(4,843,521)
Net income (loss)	(539,508)	(3,937,048)
CMF FORT Contrarian Master Fund LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	2,602,136	2,172,289
Total trading results	34,257,304	(12,008,806)
Net income (loss)	36,859,440	$ (9,836,517)
CMF NL Master Fund LLC [Member]
Investment Holdings [Line Items]
Net Investment Income (Loss)	152,833
Total trading results	(6,328,890)
Net income (loss)	$ (6,176,057)

Investment in the Funds - Partn

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, 2019		Dec. 31, 2018		Dec. 31, 2017	Sep. 30, 2019
Investment Holdings [Line Items]
% of Partners' Capital	68.48%		100.09%
Fair Value	$ 330,936,811	[1]	$ 606,579,513	[1]		$ 330,936,811
Income (Loss)	50,049,263		(48,172,549)		$ (1,840,380)
Expenses, Clearing Fees	5,384,435		282,874		798,567
Expenses, Professional Fees	1,226,099		1,489,943		1,713,581
Management fees	5,411,434		7,223,233		9,007,592
Net income (loss)	$ 25,690,989		$ (70,546,419)		$ (33,240,575)
CMF Winton Master L.P. [Member]
Investment Holdings [Line Items]
% of Partners' Capital	15.96%		25.30%
Fair Value	$ 77,128,248		$ 153,304,033
CMF TT II, LLC [Member]
Investment Holdings [Line Items]
% of Partners' Capital	24.75%		24.51%
Fair Value	$ 119,608,248		$ 148,573,425
CMF Willowbridge Master Fund L.P.[Member]
Investment Holdings [Line Items]
% of Partners' Capital	0.00%		24.53%
Fair Value	$ 0		$ 148,663,921
CMF FORT Contrarian Master Fund LLC [Member]
Investment Holdings [Line Items]
% of Partners' Capital	24.19%		25.75%
Fair Value	$ 116,899,563		$ 156,038,134
CMF NL Master Fund LLC [Member]
Investment Holdings [Line Items]
% of Partners' Capital	3.58%
Fair Value	$ 17,300,752
Investment In Funds [Member]
Investment Holdings [Line Items]
Income (Loss)	38,901,223		(23,821,998)
Expenses, Clearing Fees	1,671,046		4,034,148
Expenses, Professional Fees	205,749		148,390
Management fees	1,185,744		1,449,384
Incentive Fee	1,815		47,039
Net income (loss)	35,836,869		(29,500,959)
Investment In Funds [Member] \| Commodity [Member] \| CMF Winton Master L.P. [Member]
Investment Holdings [Line Items]
Income (Loss)	3,832,573		241,406
Expenses, Clearing Fees	159,802		214,137
Expenses, Professional Fees	24,788		30,606
Management fees	0		0
Incentive Fee	0		0
Net income (loss)	$ 3,647,983		$ (3,337)
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)	$ 8,171,983		$ (15,288,450)
Expenses, Clearing Fees	955,013		1,039,887
Expenses, Professional Fees	67,742		274
Management fees	1,185,744		1,449,384
Incentive Fee	1,815		47,039
Net income (loss)	$ 5,961,669		$ (17,825,034)
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)	$ (394,257)		$ (825,674)
Expenses, Clearing Fees	84,076		2,381,900
Expenses, Professional Fees	5,077		64,577
Management fees	0		0
Incentive Fee	0		0
Net income (loss)	$ (483,410)		$ (3,272,151)
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)	$ 31,990,597		$ (7,949,280)
Expenses, Clearing Fees	407,231		398,224
Expenses, Professional Fees	58,882		52,933
Management fees	0		0
Incentive Fee	0		0
Net income (loss)	$ 31,524,484		$ (8,400,437)
Investment Objective	Commodity Portfolio		Commodity Portfolio
Redemptions Permitted	Monthly		Monthly
Investment In Funds [Member] \| Commodity [Member] \| CMF NL Master Fund LLC [Member]
Investment Holdings [Line Items]
Income (Loss)	$ (4,699,673)
Expenses, Clearing Fees	64,924
Expenses, Professional Fees	49,260
Management fees	0
Incentive Fee	0
Net income (loss)	$ (4,813,857)
Investment Objective	Commodity Portfolio
Redemptions Permitted	Monthly

[1]	Defined in Note 1.

Subscriptions, Distributions _2

Subscriptions, Distributions and Redemptions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019USD ($)
Statement of Partners' Capital [Abstract]
Fees charged to Limited Partners	$ 0

Financial Highlights - Schedule

Financial Highlights - Schedule of Changes in Net Asset Value (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class A Redeemable Units [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the year):
Net realized and unrealized gains (losses)	$ 243.15	$ (192.42)	$ 7.10
Net investment loss	(122.35)	(86.93)	(102.28)
Increase (decrease) for the year	120.80	(279.35)	(95.18)
Net asset value per Redeemable Unit, beginning of year	2,608.11	2,887.46	2,982.64
Net asset value per Redeemable Unit, end of year	2,728.91	2,608.11	2,887.46
Class Z Redeemable Units [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the year):
Net realized and unrealized gains (losses)	96.46	(75.81)	3.30
Net investment loss	(24.51)	(12.94)	(20.47)
Increase (decrease) for the year	71.95	(88.75)	(17.17)
Net asset value per Redeemable Unit, beginning of year	1,034.06	1,122.81	1,139.98
Net asset value per Redeemable Unit, end of year	$ 1,106.01	$ 1,034.06	$ 1,122.81

Financial Highlights - Ratios t

Financial Highlights - Ratios to Average Limited Partners' Capital (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class A Redeemable Units [Member]
Ratios to Average Limited Partners' Capital:
Net investment loss	(4.50%)	(3.20%)	(3.60%)
Operating expense	5.80%	4.80%	4.40%
Incentive fees	0.50%	0.00%	0.00%
Total expenses	6.30%	4.80%	4.40%
Total return:
Total return before incentive fees	5.20%	(9.70%)	(3.20%)
Incentive fees	(0.50%)	(0.00%)	(0.00%)
Total return after incentive fees	4.60%	(9.70%)	(3.20%)
Class Z Redeemable Units [Member]
Ratios to Average Limited Partners' Capital:
Net investment loss	(2.30%)	(1.20%)	(1.90%)
Operating expense	3.60%	2.90%	2.70%
Incentive fees	0.40%	0.00%	0.00%
Total expenses	4.00%	2.90%	2.70%
Total return:
Total return before incentive fees	7.40%	(7.90%)	(1.50%)
Incentive fees	(0.40%)	(0.00%)	(0.00%)
Total return after incentive fees	7.00%	(7.90%)	(1.50%)

Financial Instrument Risks - Ad

Financial Instrument Risks - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
Concentration Risk [Line Items]
Financial instruments maturity period	1 year
Minimum [Member] \| Credit Concentration Risk [Member] \| Partnership's/Funds' Contracts [Member] \| Over the Counter [Member]
Concentration Risk [Line Items]
Concentration risk percentage	4.00%
Maximum [Member] \| Credit Concentration Risk [Member] \| Partnership's/Funds' Contracts [Member] \| Over the Counter [Member]
Concentration Risk [Line Items]
Concentration risk percentage	24.30%