Potomac Futures Fund (POTO) 10-K 28 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 28, 2018	Jun. 30, 2017
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	POTO
Entity Registrant Name	POTOMAC FUTURES FUND LP
Entity Central Index Key	1,043,565
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 Public Float			$ 24,045,337
Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		15,737.7238
Class Z [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		0

Statements of Financial Conditi

Statements of Financial Condition - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Assets:
Investment in the Master, at fair value (Note 1)		$ 18,270,979
Equity in trading account:
Unrestricted cash (Note 3c)	$ 18,417,831
Restricted cash (Note 3c)	4,063,802
Net unrealized appreciation on open contracts	472,246
Total equity in trading account	22,953,879
Receivable from General Partner (Note 3a)	4,123
Interest receivable	21,906
Cash at MS&Co. (Note 3c)		126,256
Cash at bank (Note 1)	436	217
Total assets	22,980,344	18,397,452
Accrued expenses:
Ongoing selling agent fees (Note 3d)	37,827	30,313
Management fees (Note 3b)	28,563	22,816
General Partner fees (Note 3a)	19,042	15,210
Professional fees	92,491	114,608
Redemptions payable to Limited Partners (Note 6)	539,044	519,960
Total liabilities	716,967	702,907
Partners' Capital (Notes 1 and 6):
Total partners' capital (net asset value)	22,263,377	17,694,545
Total liabilities and partners' capital	22,980,344	18,397,452
Forward Contracts [Member]
Equity in trading account:
Net unrealized appreciation on open contracts	205,060
Futures [Member]
Equity in trading account:
Net unrealized appreciation on open contracts	267,186
Class A [Member]
Partners' Capital (Notes 1 and 6):
Limited Partners, Class A, 16,183.6278 and 12,965.3578 Redeemable Units outstanding at December 31, 2017 and 2016, respectively	21,985,171	17,486,619
Total partners' capital (net asset value)	$ 21,985,171	$ 17,486,619
Net asset value per Redeemable Unit	$ 1,358.48	$ 1,348.72
Class Z [Member]
Partners' Capital (Notes 1 and 6):
General Partner, Class Z, 296.6740 and 227.8640 Redeemable Units outstanding at December 31, 2017 and 2016, respectively	$ 278,206	$ 207,926
Total partners' capital (net asset value)	$ 278,206	$ 207,926
Net asset value per Redeemable Unit	$ 937.75	$ 912.50

Statements of Financial Condit3

Statements of Financial Condition (Parenthetical) - shares	Dec. 31, 2017	Dec. 31, 2016
Class A [Member]
Limited Partners Redeemable Units outstanding	16,183.6278	12,965.3578
Class Z [Member]
General Partner Redeemable Units outstanding	296.6740	227.8640

Condensed Schedule of Investmen

Condensed Schedule of Investments	Dec. 31, 2017USD ($)Derivative
Futures [Member]
Schedule of Investments [Line Items]
Net unrealized appreciation on open contracts	$ 267,186
Percentage of Partners' Capital	1.20%
Total unrealized appreciation on open contracts	$ 722,562
Total unrealized depreciation on open contracts	(455,376)
Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 225,388
Percentage of Partners' Capital	1.01%
Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 41,798
Percentage of Partners' Capital	0.19%
Metals [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 59,445
Total unrealized depreciation on open contracts	$ (3,000)
Metals [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	20
Investment, Fair Value	$ 59,445
Percentage of Partners' Capital	0.27%
Metals [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	4
Investment, Fair Value	$ (3,000)
Percentage of Partners' Capital	(0.01%)
Energy [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 175,224
Total unrealized depreciation on open contracts	$ (82,362)
Energy [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	61
Investment, Fair Value	$ 175,212
Percentage of Partners' Capital	0.79%
Energy [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	32
Investment, Fair Value	$ (82,350)
Percentage of Partners' Capital	(0.37%)
Grains [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 102,158
Total unrealized depreciation on open contracts	$ (7,954)
Grains [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	2
Investment, Fair Value	$ (2,840)
Percentage of Partners' Capital	(0.01%)
Grains [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	204
Investment, Fair Value	$ 97,044
Percentage of Partners' Capital	0.44%
Indices [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 279,491
Total unrealized depreciation on open contracts	$ (110,784)
Indices [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	347
Investment, Fair Value	$ 173,442
Percentage of Partners' Capital	0.78%
Indices [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	21
Investment, Fair Value	$ (4,735)
Percentage of Partners' Capital	(0.02%)
Interest Rates U.S. [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 45,321
Total unrealized depreciation on open contracts	$ (10,654)
Interest Rates U.S. [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	14
Investment, Fair Value	$ 7,062
Percentage of Partners' Capital	0.03%
Interest Rates U.S. [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	213
Investment, Fair Value	$ 27,605
Percentage of Partners' Capital	0.12%
Interest Rates Non-U.S. [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 9,980
Total unrealized depreciation on open contracts	$ (236,497)
Interest Rates Non-U.S. [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	204
Investment, Fair Value	$ (226,963)
Percentage of Partners' Capital	(1.02%)
Interest Rates Non-U.S. [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	240
Investment, Fair Value	$ 446
Percentage of Partners' Capital	0.00%	[1]
Livestock [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 3,770
Total unrealized depreciation on open contracts	$ (1,560)
Livestock [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	8
Investment, Fair Value	$ 3,750
Percentage of Partners' Capital	0.02%
Livestock [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	2
Investment, Fair Value	$ (1,540)
Percentage of Partners' Capital	(0.01%)
Softs [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 47,173
Total unrealized depreciation on open contracts	$ (2,565)
Softs [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	14
Investment, Fair Value	$ 36,280
Percentage of Partners' Capital	0.15%
Softs [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	22
Investment, Fair Value	$ 8,328
Percentage of Partners' Capital	0.04%
Forward Contracts [Member]
Schedule of Investments [Line Items]
Net unrealized appreciation on open contracts	$ 205,060
Percentage of Partners' Capital	0.92%
Total unrealized appreciation on open contracts	$ 819,639
Total unrealized depreciation on open contracts	(614,579)
Forward Contracts [Member] | Metals [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	167,165
Total unrealized depreciation on open contracts	(75,045)
Forward Contracts [Member] | Currencies [Member]
Schedule of Investments [Line Items]
Notional	48,393,022
Total unrealized appreciation on open contracts	652,474
Notional	35,002,762
Total unrealized depreciation on open contracts	$ (539,534)
Unrealized Appreciation [Member] | Forward Contracts [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	3.68%
Unrealized Appreciation [Member] | Forward Contracts [Member] | Metals [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	39
Percentage of Partners' Capital	0.75%
Unrealized Appreciation [Member] | Forward Contracts [Member] | Currencies [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	2.93%
Unrealized Depreciation [Member] | Forward Contracts [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	(2.76%)
Unrealized Depreciation [Member] | Forward Contracts [Member] | Metals [Member]
Schedule of Investments [Line Items]
Number of Contracts	14
Percentage of Partners' Capital	(0.34%)
Unrealized Depreciation [Member] | Forward Contracts [Member] | Currencies [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	(2.42%)
[1]	Due to rounding.

Statements of Income and Expens

Statements of Income and Expenses - USD ($)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investment Income:
Interest income (Note 3c)		$ 109,109
Interest income allocated from the Master (Note 3c)		92,905	$ 45,442	$ 2,081
Total investment income		202,014	45,442	2,081
Expenses:
Expenses allocated from the Master		125,277	192,598	234,518
Clearing fees related to direct investments (Note 3c)		41,970
Ongoing selling agent fees (Note 3d)		529,876	461,501	591,556
Management fees (Note 3b)		400,229	346,035	441,407
General Partner fees (Note 3a)		266,820	230,690	294,269
Incentive fees (Note 3b)				84,431
Professional fees		255,641	331,230	219,601
Total expenses		1,619,813	1,562,054	1,865,782
Expenses borne by the General Partner (Note 3a)		(181,311)
Net expenses		1,438,502	1,562,054	1,865,782
Net investment loss		(1,236,488)	(1,516,612)	(1,863,701)
Net gains (losses) on trading of commodity interests and investment in the Master:
Net realized gains (losses) on closed contracts		1,863,780
Net realized gains (losses) on closed contracts allocated from the Master		(903,323)	(2,413,231)	1,839,783
Net change in unrealized gains (losses) on open contracts		475,211
Net change in unrealized gains (losses) on open contracts allocated from the Master		(252,646)	594,824	(1,864,306)
Total trading results		1,183,022	(1,818,407)	(24,523)
Net income (loss)		(53,466)	(3,335,019)	(1,888,224)
Class A [Member]
Net gains (losses) on trading of commodity interests and investment in the Master:
Net income (loss)		$ (56,971)	$ (3,313,437)	$ (1,888,224)
Net income (loss) per Redeemable Unit	[1]	$ 9.76	$ (222.31)	$ (105.58)
Weighted average Redeemable Units outstanding		19,944.6721	15,454.5329	17,729.3828
Class Z [Member]
Net gains (losses) on trading of commodity interests and investment in the Master:
Net income (loss)		$ 3,505	$ (21,582)
Net income (loss) per Redeemable Unit	[1]	$ 25.25	$ (87.50)
Weighted average Redeemable Units outstanding		357.2938	246.1860
[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 [Member]	Class A [Member]Limited Partners [Member]	Class A [Member]General Partner [Member]	Class Z [Member]	Class Z [Member]General Partner [Member]
Net asset value per Redeemable Unit					$ 1,676.61
Partners' Capital, beginning of period at Dec. 31, 2014	$ 30,242,428			$ 30,242,428
Subscriptions		$ 2,182,466			$ 2,182,466
Redemptions		$ (3,775,641)			$ (3,775,641)
Net income (loss)	(1,888,224)			(1,888,224)
Partners' Capital, end of period at Dec. 31, 2015	$ 26,761,029			$ 26,761,029
Partners' Capital, Redeemable Units, beginning of period at Dec. 31, 2014	18,037.8864			18,037.8864
Subscriptions, Redeemable Units		1,277.0790			1,277.0790
Partners' Capital, Redeemable Units, end of period at Dec. 31, 2015	17,034.0864			17,034.0864
Redemptions, Redeemable Units		(2,280.8790)			(2,280.8790)
Net asset value per Redeemable Unit				$ 1,571.03	$ 1,571.03
Subscriptions		$ 218,400	$ 264,508		$ 218,400			$ 264,508
Redemptions		$ (5,889,865)	$ (324,508)		$ (5,889,865)	$ (289,508)		$ (35,000)
Net income (loss)	$ (3,335,019)			$ (3,313,437)			$ (21,582)
Partners' Capital, end of period at Dec. 31, 2016	$ 17,694,545			$ 17,486,619			$ 207,926
Subscriptions, Redeemable Units		145.6740	264.5080		145.6740			264.5080
Partners' Capital, Redeemable Units, end of period at Dec. 31, 2016	13,193.2218			12,965.3578			227.8640
Redemptions, Redeemable Units		(4,021.8240)	(229.2226)		(4,021.8240)	(192.5786)		(36.6440)
Net asset value per Redeemable Unit				$ 1,348.72	$ 1,348.72		$ 912.50
Subscriptions		$ 15,266,995	$ 181,777		$ 15,266,995			$ 181,777
Redemptions		$ (10,711,472)	$ (115,002)		$ (10,711,472)			$ (115,002)
Net income (loss)	$ (53,466)			$ (56,971)			$ 3,505
Partners' Capital, end of period at Dec. 31, 2017	$ 22,263,377			$ 21,985,171			$ 278,206
Subscriptions, Redeemable Units		11,319.9380	199.2080		11,319.9380			199.2080
Partners' Capital, Redeemable Units, end of period at Dec. 31, 2017	16,480.3018			16,183.6278			296.6740
Redemptions, Redeemable Units		(8,101.6680)	(130.3980)		(8,101.6680)			(130.3980)
Net asset value per Redeemable Unit				$ 1,358.48	$ 1,358.48		$ 937.75

Organization

Organization	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	1. Organization: Potomac Futures Fund L.P. (the “Partnership”) is a limited partnership organized on March 14, 1997 under the partnership laws of the State of New York to engage, directly and 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, indices, 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. As of January 1, 2017, the General Partner became a wholly-owned During the periods covered by this report, the Partnership’s and the Master’s (prior to its termination effective July 31, 2017) commodity broker was Morgan Stanley & Co. LLC (“MS&Co.”), a registered futures commission merchant. The Partnership also deposits, and the Master deposited, a portion of their cash in non-trading On January 1, 2005, the Partnership allocated substantially all of its capital to the Master, a limited partnership organized under the partnership laws of the State of New York. Effective July 14, 2017, the Partnership fully redeemed its investment in the Master. As of July 17, 2017, all positions from the Master have been transferred to the Partnership and the Advisor commenced trading the Partnership’s assets directly pursuant to the Campbell Managed Futures Portfolio Strategy, a proprietary, systematic trading program. Consequently, the General Partner liquidated the Master, effective July 31, 2017. The units of the Master were used solely for accounting purposes and did not represent legally distinct units. Prior to the Master’s termination of operations on July 31, 2017, the Master permitted accounts managed by the Advisor using the Campbell Managed Futures Portfolio Strategy to invest together in one trading vehicle. The General Partner was also the general partner of the Master. Expenses to investors as a result of the investment in the Master, prior to the Partnership’s full redemption from the Master effective July 14, 2017, were approximately the same as expenses to investors as a result of the Partnership trading directly, and redemption rights were not affected. As of March 22, 2016, the Partnership began offering two classes of limited partnership interests, Class A Redeemable Units and Class Z Redeemable Units. All Redeemable Units issued prior to February 29, 2016 were deemed “Class A Redeemable Units.” The rights, liabilities, risks, and fees associated with investment in the Class A Redeemable Units were not changed. Class A Redeemable Units and Class Z Redeemable Units will each be referred to as a “Class” and collectively referred to as the “Classes.” Class A Redeemable Units are available to taxable U.S. individuals and institutions, U.S. tax exempt individuals and institutions, and non-U.S. The financial statements of the Master, including the Condensed Schedule of Investments, are attached to this report and should be read together with the Partnership’s financial statements. Prior to the Partnership’s full redemption from the Master effective July 14, 2017 and as of December 31, 2016, the Partnership owned 100% of the Master. The performance of the Partnership was directly affected by the performance of the Master. The Partnership’s/Master’s trading of futures, forward, swap and option contracts, if applicable, on commodities are or were done primarily on U.S. and foreign commodity exchanges. The Partnership engages, and the Master engaged, in such trading through commodity brokerage accounts maintained with MS&Co. The Partnership will be liquidated upon the first to occur of the following: December 31, 2057; the net asset value per Redeemable Unit of any Class decreases to less than $400 per Redeemable Unit as of a close of any business day; or under certain other circumstances as defined in the limited partnership agreement of the Partnership (the “Limited Partnership Agreement”). In July 2015, the General Partner 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, 2017
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/Master’s Investments All commodity interests of the Partnership, including derivative financial instruments and derivative commodity instruments, are held, and those of the Master were held, for trading purposes. The commodity interests for the Partnership/Master are or were recorded on the trade date and open contracts are or were recorded at fair value (as described in Note 5, “Fair Value Measurements”) at the measurement date. The Partnership’s/Master’s investments in commodity interests denominated in foreign currencies are or were translated into U.S. dollars at the exchange rates prevailing at the measurement date. Gains or losses for the Partnership/Master are or were realized when contracts are or were liquidated and are or were determined by using the first-in, first-out Partnership’s/Master’s Cash. e. Income Taxes Income Taxes “more-likely-than-not” more-likely-than-not f. Investment Company Status 2013-08, Financial Services — Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements g. Net Income (Loss) per Redeemable Unit Financial Services – Investment Companies.”

Agreements

Agreements	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Agreements	3. Agreements: a. Limited Partnership Agreement: The General Partner administers the business and affairs of the Partnership. The Partnership pays the General Partner a monthly General Partner fee in return for its services to the Partnership equal to 1/12 of 1% (1% per year) of month-end Month-end b. Management Agreement: The General Partner, on behalf of the Partnership, has entered into a management agreement (the “Management Agreement”) with the Advisor, a registered commodity trading advisor. The Management Agreement provides that the Advisor has discretion in determining the investment of the assets of the Partnership allocated to the Advisor by the General Partner. The Partnership will pay a monthly management fee equal to 1/12 of 1.5% (1.5% per year) of month-end Month-end The Partnership is obligated to pay the Advisor an incentive fee, payable quarterly, equal to 20% of the new trading profits, as defined in the Management Agreement, earned by the Advisor for the Partnership during each calendar quarter. The Advisor’s incentive fee will be allocated proportionally to each Class based on the net asset value of the respective Class. The Advisor will not be paid incentive fees until the Advisor recovers the net loss incurred and earns additional new trading profits for the Partnership. In allocating the assets of the Partnership to the Advisor, the General Partner considers, among other things, the 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 Advisor at any time. c. Customer Agreement: The Partnership has entered into a customer agreement with MS&Co. (the “Customer Agreement”). Under the Customer Agreement and foreign exchange brokerage account agreement (described in Note 4, “Trading Activities”), the Partnership pays trading fees for the clearing and, where applicable, the execution of transactions as well as exchange, user, give-up, 4-week 4-week d. Selling Agent Agreement: The Partnership has entered into a selling agent agreement with Morgan Stanley Wealth Management (the “Selling Agreement”). Under the Selling Agreement, the Partnership pays Morgan Stanley Wealth Management a monthly ongoing selling agent fee equal to 2.0% per year of the Partnership’s adjusted month-end Month-end

Trading Activities

Trading Activities	12 Months Ended
	Dec. 31, 2017
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 interests. Prior to its full redemption from the Master effective July 14, 2017, the Partnership invested substantially all of its assets through a “master/feeder” structure. The Partnership’s pro-rata The futures brokerage account agreements with MS&Co. give the Partnership, and gave the Master, respectively, the legal right to net unrealized gains and losses on open futures and forward contracts. The Partnership nets, and the Master netted, 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,” Trading and transaction fees are based on the number of trades executed by the Advisor. All clearing fees paid to MS&Co. are directly charged to the Partnership and prior to the Partnership’s full redemption from the Master effective July 14, 2017, were borne by the Master and allocated to the Partnership. All of the commodity interests owned by the Partnership are, and by the Master were, held for trading purposes. The monthly average number of futures contracts traded by the Partnership/Master during the years ended December 31, 2017 and 2016 were 1,712 and 1,120, respectively. The monthly average number of metals forward contracts traded by the Partnership/Master during the years ended December 31, 2017 and 2016 were 236 and 263, respectively. The monthly average notional values of currency forward contracts traded by the Partnership/Master during the years ended December 31, 2017 and 2016 were $175,388,882 and $243,676,061, respectively. The following table summarizes the gross and net amounts relating to assets and liabilities of the Partnership’s derivatives and their offsetting subject to master netting arrangements or similar agreements as of December 31, 2017. Gross Amounts Amounts Gross Amounts Not Offset in the Statements of the Statements Cash Collateral Gross Amounts Financial of Financial Financial Received/ December 31, 2017 Recognized Condition Condition Instruments Pledged * Net Amount Assets Futures $ 722,562 $ (455,376) $ 267,186 $ - $ - $ 267,186 Forwards 819,639 (614,579) 205,060 - - 205,060 Total assets $ 1,542,201 $ (1,069,955) $ 472,246 $ - $ - $ 472,246 Liabilities Futures $ (455,376) $ 455,376 $ - $ - $ - $ - Forwards (614,579) 614,579 - - - - Total liabilities $ (1,069,955) $ 1,069,955 $ - $ - $ - $ - Net fair value $ 472,246 * * 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 table indicates the gross fair values of derivative instruments of futures and forward contracts as separate assets and liabilities for the Partnership as of December 31, 2017. Assets December 31, 2017 Futures Contracts Energy $ 175,224 Grains 102,158 Indices 279,491 Interest Rates U.S. 45,321 Interest Rates Non-U.S. 9,980 Livestock 3,770 Metals 59,445 Softs 47,173 Total unrealized appreciation on open futures contracts 722,562 Liabilities Futures Contracts Energy (82,362) Grains (7,954) Indices (110,784) Interest Rates U.S. (10,654) Interest Rates Non-U.S. (236,497) Livestock (1,560) Metals (3,000) Softs (2,565) Total unrealized depreciation on open futures contracts (455,376) Net unrealized appreciation on open futures contracts $ 267,186 * Assets Forward Contracts Currencies $ 652,474 Metals 167,165 Total unrealized appreciation on open forward contracts 819,639 Liabilities Forward Contracts Currencies (539,534) Metals (75,045) Total unrealized depreciation on open forward contracts (614,579) Net unrealized appreciation on open forward contracts $ 205,060 ** * This amount is in “Net unrealized appreciation on open futures contracts” in the Partnership’s Statements of Financial Condition. ** This amount is in “Net unrealized appreciation on open forward contracts” in the Partnership’s Statements of Financial Condition. The following table indicates the trading gains and losses, by market sector, on derivative instruments for the years ended December 31 2017, 2016 and 2015. Sector 2017** 2016 2015 Currencies $ (1,586,994) $ (232,835) $ 913,756 Energy (595,331) (1,339,102) 991,586 Grains (759,369) 254,390 (667,075) Indices 5,597,239 (453,676) 342,751 Interest Rates U.S. (366,474) (135,278) (530,628) Interest Rates Non-U.S. (879,489) 1,121,232 (616,519) Livestock (90,330) (295,814) 721,872 Metals (28,141) (299,841) (604,626) Softs (108,089) (437,483) (575,640) Total $ 1,183,022 * $ (1,818,407) * $ (24,523) * * This amount is in “Total trading results” in the Partnership’s/Master’s Statements of Income and Expenses. ** Prior to July 17, 2017, trading gains and losses were allocated to the Partnership through its investment in the Master, of which the Partnership owned 100%.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	5. Fair Value Measurements: Partnership’s/Master’s 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 considers, and the Master considered, 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, 2017 Total Level 1 Level 2 Level 3 Assets Futures $ 722,562 $ 722,562 $ - $ - Forwards 819,639 - 819,639 - Total assets $ 1,542,201 $ 722,562 $ 819,639 $ - Liabilities Futures $ 455,376 $ 455,376 $ - $ - Forwards 614,579 - 614,579 - Total liabilities $ 1,069,955 $ 455,376 $ 614,579 $ -

Subscriptions, Distributions an

Subscriptions, Distributions and Redemptions	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Subscriptions, Distributions and Redemptions	6. 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
	Dec. 31, 2017
Text Block [Abstract]
Financial Highlights	7. Financial Highlights: Financial highlights for the limited partner class as a whole for the years ended December 31, 2017, 2016 and 2015 were as follows: Class A 2017 2016 2015 Per Redeemable Unit Performance (for a unit outstanding throughout the year): * Net realized and unrealized gains (losses) $ 71.32 $ (124.48) $ (0.43) Net investment loss (61.56) (97.83) (105.15) Increase (decrease) for the year 9.76 (222.31) (105.58) Net asset value per Redeemable Unit, beginning of year 1,348.72 1,571.03 1,676.61 Net asset value per Redeemable Unit, end of year $ 1,358.48 $ 1,348.72 $ 1,571.03 2017 2016 2015 Ratios to Average Limited Partners’ Capital: Net investment loss ** (5.0) % (6.7) % (6.4) % Operating expenses before expenses borne by the General Partner and incentive fees 6.5 % 6.9 % 6.1 % Expenses borne by the General Partner (0.7) % - % - % Incentive fees - % - % 0.3 % Operating expenses after expenses borne by the General Partner and incentive fees 5.8 % 6.9 % 6.4 % Total return: Total return before incentive fees 0.7 % (14.2) % (6.0) % Incentive fees - % - % (0.3) % Total return after incentive fees 0.7 % (14.2) % (6.3) % * 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 year. 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, including interest income allocated from the Master prior to the Partnership’s full redemption from the Master effective July 14, 2017, less total expenses. The above ratios and total return may vary for individual investors based on the timing of capital transactions during the year. Additionally, these ratios are calculated for the limited partner class using the limited partners’ share of income, expenses and average partners’ capital of the Partnership and include the income and expenses allocated from the Master prior to the Partnership’s full redemption from the Master effective July 14, 2017.

Financial Instrument Risks

Financial Instrument Risks	12 Months Ended
	Dec. 31, 2017
Investments, All Other Investments [Abstract]
Financial Instrument Risks	8. Financial Instrument Risks: In the normal course of business, the Partnership is, and was, through its investment in the Master prior to its full redemption effective July 14, 2017, party to financial instruments with off-balance over-the-counter Futures Contracts. Forward Foreign Currency Contracts. London Metals Exchange Forward Contracts. Market risk is the potential for changes in the value of the financial instruments traded by the Partnership/Master due to market changes, including interest and foreign exchange rate movements and fluctuations in commodity or security prices. The Partnership’s market risk is, and the Master’s market risk was, directly impacted by the volatility and liquidity in the markets in which the related underlying assets are or were traded. The Partnership is, and the Master was, exposed to a market risk equal to the value of futures and forward contracts purchased 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 risk of loss in the event of a counterparty default for the Partnership is, and for the Master was, typically limited to the amounts recognized in the Statements of Financial Condition and is not for the Partnership, and was not for the Master, represented by the contract or notional amounts of the instruments. The risk of loss is for the Partnership, and was for the Master, reduced through the use of legally enforceable master netting agreements with counterparties that permit the Partnership, and permitted the Master, to offset unrealized gains and losses and other assets and liabilities with such counterparties upon the occurrence of certain events. The Partnership has, and the Master had, credit risk and concentration risk, as MS&Co. or an MS&Co. affiliate is or was the sole counterparty or broker with respect to the Partnership’s/Master’s assets. Credit risk with respect to exchange-traded The General Partner monitors and attempts for the Partnership, and monitored and attempted for the Master, to mitigate the Partnership’s/Master’s risk exposure on a daily basis through financial, credit and risk management monitoring systems, and accordingly believes that it has or had effective procedures for evaluating and limiting the credit and market risks to which the Partnership may be, and the Master may have been, subject. These monitoring systems generally allow and allowed the General Partner to statistically analyze actual trading results with risk-adjusted The majority of these financial instruments mature within one year of the inception date. However, due to the nature of the Partnership’s business, these instruments may not be held to maturity. The risk for 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 enters, and the Master entered, into contracts and agreements that contain or contained various representations and warranties and which provide or provided general indemnifications. The Partnership’s/Master’s maximum exposure under these arrangements cannot be determined, as this could include future claims that have not yet been made against the Partnership/Master. The Partnership considers, and the Master considered, the risk of any future obligation relating to these indemnifications to be remote.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	9. 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 there were no subsequent events requiring adjustment to or disclosure in the financial statements.

Basis of Presentation and Sum16

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
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/Master's Investments	d. Partnership’s/Master’s Investments All commodity interests of the Partnership, including derivative financial instruments and derivative commodity instruments, are held, and those of the Master were held, for trading purposes. The commodity interests for the Partnership/Master are or were recorded on the trade date and open contracts are or were recorded at fair value (as described in Note 5, “Fair Value Measurements”) at the measurement date. The Partnership’s/Master’s investments in commodity interests denominated in foreign currencies are or were translated into U.S. dollars at the exchange rates prevailing at the measurement date. Gains or losses for the Partnership/Master are or were realized when contracts are or were liquidated and are or were determined by using the first-in, first-out
Partnership's/Master's Cash	Partnership’s/Master’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
	Dec. 31, 2017
Brokers and Dealers [Abstract]
Summary of Valuation of Investments	The following table summarizes the gross and net amounts relating to assets and liabilities of the Partnership’s derivatives and their offsetting subject to master netting arrangements or similar agreements as of December 31, 2017. Gross Amounts Amounts Gross Amounts Not Offset in the Statements of the Statements Cash Collateral Gross Amounts Financial of Financial Financial Received/ December 31, 2017 Recognized Condition Condition Instruments Pledged * Net Amount Assets Futures $ 722,562 $ (455,376) $ 267,186 $ - $ - $ 267,186 Forwards 819,639 (614,579) 205,060 - - 205,060 Total assets $ 1,542,201 $ (1,069,955) $ 472,246 $ - $ - $ 472,246 Liabilities Futures $ (455,376) $ 455,376 $ - $ - $ - $ - Forwards (614,579) 614,579 - - - - Total liabilities $ (1,069,955) $ 1,069,955 $ - $ - $ - $ - Net fair value $ 472,246 * * 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 as Separate Assets and Liabilities	The following table indicates the gross fair values of derivative instruments of futures and forward contracts as separate assets and liabilities for the Partnership as of December 31, 2017. Assets December 31, 2017 Futures Contracts Energy $ 175,224 Grains 102,158 Indices 279,491 Interest Rates U.S. 45,321 Interest Rates Non-U.S. 9,980 Livestock 3,770 Metals 59,445 Softs 47,173 Total unrealized appreciation on open futures contracts 722,562 Liabilities Futures Contracts Energy (82,362) Grains (7,954) Indices (110,784) Interest Rates U.S. (10,654) Interest Rates Non-U.S. (236,497) Livestock (1,560) Metals (3,000) Softs (2,565) Total unrealized depreciation on open futures contracts (455,376) Net unrealized appreciation on open futures contracts $ 267,186 * Assets Forward Contracts Currencies $ 652,474 Metals 167,165 Total unrealized appreciation on open forward contracts 819,639 Liabilities Forward Contracts Currencies (539,534) Metals (75,045) Total unrealized depreciation on open forward contracts (614,579) Net unrealized appreciation on open forward contracts $ 205,060 ** * This amount is in “Net unrealized appreciation on open futures contracts” in the Partnership’s Statements of Financial Condition. ** This amount is in “Net unrealized appreciation on open forward contracts” in the Partnership’s Statements of Financial Condition.
Trading Gains and Losses, by Market Sector, on Derivative Instruments	The following table indicates the trading gains and losses, by market sector, on derivative instruments for the years ended December 31 2017, 2016 and 2015. Sector 2017** 2016 2015 Currencies $ (1,586,994) $ (232,835) $ 913,756 Energy (595,331) (1,339,102) 991,586 Grains (759,369) 254,390 (667,075) Indices 5,597,239 (453,676) 342,751 Interest Rates U.S. (366,474) (135,278) (530,628) Interest Rates Non-U.S. (879,489) 1,121,232 (616,519) Livestock (90,330) (295,814) 721,872 Metals (28,141) (299,841) (604,626) Softs (108,089) (437,483) (575,640) Total $ 1,183,022 * $ (1,818,407) * $ (24,523) * * This amount is in “Total trading results” in the Partnership’s/Master’s Statements of Income and Expenses. ** Prior to July 17, 2017, trading gains and losses were allocated to the Partnership through its investment in the Master, of which the Partnership owned 100%.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Derivative Instrument Fair Value Based on Hierarchy	December 31, 2017 Total Level 1 Level 2 Level 3 Assets Futures $ 722,562 $ 722,562 $ - $ - Forwards 819,639 - 819,639 - Total assets $ 1,542,201 $ 722,562 $ 819,639 $ - Liabilities Futures $ 455,376 $ 455,376 $ - $ - Forwards 614,579 - 614,579 - Total liabilities $ 1,069,955 $ 455,376 $ 614,579 $ -

Financial Highlights (Tables)

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2017
Text Block [Abstract]
Financial Highlights for Limited Partner Class	Financial highlights for the limited partner class as a whole for the years ended December 31, 2017, 2016 and 2015 were as follows: Class A 2017 2016 2015 Per Redeemable Unit Performance (for a unit outstanding throughout the year): * Net realized and unrealized gains (losses) $ 71.32 $ (124.48) $ (0.43) Net investment loss (61.56) (97.83) (105.15) Increase (decrease) for the year 9.76 (222.31) (105.58) Net asset value per Redeemable Unit, beginning of year 1,348.72 1,571.03 1,676.61 Net asset value per Redeemable Unit, end of year $ 1,358.48 $ 1,348.72 $ 1,571.03 2017 2016 2015 Ratios to Average Limited Partners’ Capital: Net investment loss ** (5.0) % (6.7) % (6.4) % Operating expenses before expenses borne by the General Partner and incentive fees 6.5 % 6.9 % 6.1 % Expenses borne by the General Partner (0.7) % - % - % Incentive fees - % - % 0.3 % Operating expenses after expenses borne by the General Partner and incentive fees 5.8 % 6.9 % 6.4 % Total return: Total return before incentive fees 0.7 % (14.2) % (6.0) % Incentive fees - % - % (0.3) % Total return after incentive fees 0.7 % (14.2) % (6.3) % * 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 year. 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, including interest income allocated from the Master prior to the Partnership’s full redemption from the Master effective July 14, 2017, less total expenses.

Organization - Additional Infor

Organization - Additional Information (Detail) - $ / shares	Dec. 31, 2017	Jul. 14, 2017	Dec. 31, 2016
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage of Partnership owned		100.00%	100.00%
Minimum [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Net asset value per unit liquidation circumstance	$ 400
Partnership liquidation date circumstance	Dec. 31, 2057

Basis of Presentation and Sum21

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Cash denominated in foreign currencies	$ 149,600
Cost of foreign currencies	146,635
Uncertain tax position	$ 0
Earliest Tax Year [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Open tax year	2,014
Latest Tax Year [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Open tax year	2,017

Agreements - Additional Informa

Agreements - Additional Information (Detail) - USD ($)	Jan. 01, 2017	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2017
Investment [Line Items]
Percentage of monthly General Partner fee				0.0833%
Percentage of General Partner fee				1.00%
Percentage of monthly management fee				0.125%
Percentage of management fee				1.50%
Incentive fee, percent				20.00%
Cash held for restricted cash requirements			$ 4,063,802	$ 4,063,802
General Partner [Member] | Minimum [Member]
Investment [Line Items]
Percentage of expenses to net assets to be covered by General Partner	0.50%
MS&Co. [Member]
Investment [Line Items]
Percentage of allocable shares		80.00%	100.00%
Treasury bill maturity period				28 days
Morgan Stanley Wealth Management [Member]
Investment [Line Items]
Ongoing selling agent fee				2.00%

Trading Activities - Additional

Trading Activities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)Contract	Dec. 31, 2016USD ($)Contract
Trading Activity, Gains and Losses, Net [Line Items]
Monthly average number of futures contracts traded	1,712
Monthly average number of metals forward contracts traded	236
Forward Contracts [Member] | Currencies [Member] | Weighted Average [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Average notional values of currency forward contracts | $	$ 175,388,882
CMF Campbell Master Fund L.P. [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Monthly average number of futures contracts traded		1,120
Monthly average number of metals forward contracts traded		263
CMF Campbell Master Fund L.P. [Member] | Forward Contracts [Member] | Currencies [Member] | Weighted Average [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Average notional values of currency forward contracts | $		$ 243,676,061

Trading Activities - Summary of

Trading Activities - Summary of Valuation of Investments (Detail)	Dec. 31, 2017USD ($)
Derivative [Line Items]
Gross Amounts Recognized, Assets	$ 1,542,201
Gross Amounts Offset in the Statements of Financial Condition, Assets	(1,069,955)
Amounts Presented in the Statements of Financial Condition, Assets	472,246
Financial Instruments, Assets	0
Collateral Received/Pledged, Assets	0
Net Amount, Assets	472,246
Gross Amounts Recognized, Liabilities	(1,069,955)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	1,069,955
Amounts Presented in the Statements of Financial Condition, Liabilities	0
Financial Instruments, Liabilities	0
Collateral Received/Pledged, Liabilities	0
Net Amount, Liabilities	0
Net fair value	472,246
Futures [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	722,562
Gross Amounts Offset in the Statements of Financial Condition, Assets	(455,376)
Amounts Presented in the Statements of Financial Condition, Assets	267,186
Financial Instruments, Assets	0
Collateral Received/Pledged, Assets	0
Net Amount, Assets	267,186
Gross Amounts Recognized, Liabilities	(455,376)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	455,376
Amounts Presented in the Statements of Financial Condition, Liabilities	0
Financial Instruments, Liabilities	0
Collateral Received/Pledged, Liabilities	0
Net Amount, Liabilities	0
Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	819,639
Gross Amounts Offset in the Statements of Financial Condition, Assets	(614,579)
Amounts Presented in the Statements of Financial Condition, Assets	205,060
Financial Instruments, Assets	0
Collateral Received/Pledged, Assets	0
Net Amount, Assets	205,060
Gross Amounts Recognized, Liabilities	(614,579)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	614,579
Amounts Presented in the Statements of Financial Condition, Liabilities	0
Financial Instruments, Liabilities	0
Collateral Received/Pledged, Liabilities	0
Net Amount, Liabilities	$ 0

Trading Activities - Gross Fair

Trading Activities - Gross Fair Values of Derivative Instruments of Futures and Forward Contracts as Separate Assets and Liabilities (Detail)	Dec. 31, 2017USD ($)
Futures [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	$ 722,562
Total unrealized depreciation on open contracts	(455,376)
Net unrealized appreciation on open contracts	267,186
Futures [Member] | Energy [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	175,224
Total unrealized depreciation on open contracts	(82,362)
Futures [Member] | Grains [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	102,158
Total unrealized depreciation on open contracts	(7,954)
Futures [Member] | Indices [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	279,491
Total unrealized depreciation on open contracts	(110,784)
Futures [Member] | Interest Rates U.S. [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	45,321
Total unrealized depreciation on open contracts	(10,654)
Futures [Member] | Interest Rates Non-U.S. [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	9,980
Total unrealized depreciation on open contracts	(236,497)
Futures [Member] | Livestock [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	3,770
Total unrealized depreciation on open contracts	(1,560)
Futures [Member] | Metals [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	59,445
Total unrealized depreciation on open contracts	(3,000)
Futures [Member] | Softs [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	47,173
Total unrealized depreciation on open contracts	(2,565)
Forward Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	819,639
Total unrealized depreciation on open contracts	(614,579)
Net unrealized appreciation on open contracts	205,060
Forward Contracts [Member] | Metals [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	167,165
Total unrealized depreciation on open contracts	(75,045)
Forward Contracts [Member] | Currencies [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	652,474
Total unrealized depreciation on open contracts	$ (539,534)

Trading Activities - Trading Ga

Trading Activities - Trading Gains and Losses, by Market Sector, on Derivative Instruments (Detail) - CMF Campbell Master Fund L.P. [Member] - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Trading gains and losses	$ 1,183,022	$ (1,818,407)	$ (24,523)
Currencies [Member]
Derivative [Line Items]
Trading gains and losses	(1,586,994)	(232,835)	913,756
Energy [Member]
Derivative [Line Items]
Trading gains and losses	(595,331)	(1,339,102)	991,586
Grains [Member]
Derivative [Line Items]
Trading gains and losses	(759,369)	254,390	(667,075)
Indices [Member]
Derivative [Line Items]
Trading gains and losses	5,597,239	(453,676)	342,751
Interest Rates U.S. [Member]
Derivative [Line Items]
Trading gains and losses	(366,474)	(135,278)	(530,628)
Interest Rates Non-U.S. [Member]
Derivative [Line Items]
Trading gains and losses	(879,489)	1,121,232	(616,519)
Livestock [Member]
Derivative [Line Items]
Trading gains and losses	(90,330)	(295,814)	721,872
Metals [Member]
Derivative [Line Items]
Trading gains and losses	(28,141)	(299,841)	(604,626)
Softs [Member]
Derivative [Line Items]
Trading gains and losses	$ (108,089)	$ (437,483)	$ (575,640)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Transfers of assets between Level 1 and Level 2	$ 0	$ 0
Transfers of liabilities between Level 1 and Level 2	$ 0	$ 0

Fair Value Measurements - Deriv

Fair Value Measurements - Derivative Instrument Fair Value Based on Hierarchy (Detail)	Dec. 31, 2017USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 1,542,201
Derivative liabilities	1,069,955
Futures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	722,562
Derivative liabilities	455,376
Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	819,639
Derivative liabilities	614,579
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	722,562
Derivative liabilities	455,376
Level 1 [Member] | Futures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	722,562
Derivative liabilities	455,376
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	819,639
Derivative liabilities	614,579
Level 2 [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	819,639
Derivative liabilities	$ 614,579

Subscriptions, Distributions 29

Subscriptions, Distributions and Redemptions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)
Statement of Partners' Capital [Abstract]
Fee charged to limited partners	$ 0

Financial Highlights - Financia

Financial Highlights - Financial Highlights for Limited Partner Class (Detail) - Class A [Member] - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Per Redeemable Unit Performance (for a unit outstanding throughout the year):
Net asset value per Redeemable Unit, beginning of year	$ 1,348.72	$ 1,571.03
Net asset value per Redeemable Unit, end of year	1,358.48	1,348.72	$ 1,571.03
Limited Partners [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the year):
Net realized and unrealized gains (losses)	71.32	(124.48)	(0.43)
Net investment loss	(61.56)	(97.83)	(105.15)
Increase (decrease) for the year	9.76	(222.31)	(105.58)
Net asset value per Redeemable Unit, beginning of year	1,348.72	1,571.03	1,676.61
Net asset value per Redeemable Unit, end of year	$ 1,358.48	$ 1,348.72	$ 1,571.03
Ratios to Average Limited Partners' Capital:
Net investment loss	(5.00%)	(6.70%)	(6.40%)
Operating expenses before expenses borne by the General Partner and incentive fees	6.50%	6.90%	6.10%
Expenses borne by the General Partner	(0.70%)
Incentive fees			0.30%
Operating expenses after expenses borne by the General Partner and incentive fees	5.80%	6.90%	6.40%
Total return:
Total return before incentive fees	0.70%	(14.20%)	(6.00%)
Incentive fees			(0.30%)
Total return after incentive fees	0.70%	(14.20%)	(6.30%)

Financial Instrument Risks - Ad

Financial Instrument Risks - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017
Risks and Uncertainties [Abstract]
Financial instruments maturity period	1 year