Potomac Futures Fund (POTO) 10-Q 8 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 31, 2019
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Registrant Name	POTOMAC FUTURES FUND LP
Entity Central Index Key	0001043565
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Address, State or Province	NY
Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		26,809.6648
Class Z [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		22.3230

Statements of Financial Conditi

Statements of Financial Condition - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Equity in trading account:
Unrestricted cash	$ 27,338,789	$ 13,460,371
Restricted cash	10,055,607	3,230,953
Net unrealized appreciation on open contracts	1,376,254	766,141
Total equity in trading account	38,770,650	17,457,465
Receivable from General Partner	0	15,849
Interest receivable	60,220	26,847
Total assets	38,830,870	17,500,161
Liabilities:
Net unrealized depreciation on open contracts	496,304	0
Accrued expenses:
Ongoing selling agent fees	63,153	28,781
Management fees	47,634	21,661
General Partner fees	28,580	14,441
Professional fees	164,149	142,206
Redemptions payable to General Partner	25,000
Redemptions payable to Limited Partners	562,112	104,315
Total liabilities	1,386,932	311,404
Partners' Capital:
Total partners' capital (net asset value)	37,443,938	17,188,757
Total liabilities and partners' capital	38,830,870	17,500,161
Forward Contracts [Member]
Equity in trading account:
Net unrealized appreciation on open contracts	0	479,523
Liabilities:
Net unrealized depreciation on open contracts	496,304	0
Futures [Member]
Equity in trading account:
Net unrealized appreciation on open contracts	1,376,254	286,618
Liabilities:
Net unrealized depreciation on open contracts	0	0
Class A [Member]
Partners' Capital:
Limited Partners,	37,028,781	16,975,265
Total partners' capital (net asset value)	$ 37,028,781	$ 16,975,265
Net asset value per Redeemable Unit	$ 1,342.02	$ 1,230.07
Class Z [Member]
Partners' Capital:
General Partner, Class Z, 412.4990 and 246.4190 Redeemable Units outstanding at June 30, 2019 and December 31, 2018, respectively	$ 393,844	$ 213,492
Limited Partners,	21,313	0
Total partners' capital (net asset value)	$ 415,157	$ 213,492
Net asset value per Redeemable Unit	$ 954.78	$ 866.38

Statements of Financial Condi_2

Statements of Financial Condition (Parenthetical) - shares	Jun. 30, 2019	Dec. 31, 2018
Class A [Member]
Limited Partners Redeemable Units outstanding	27,591.8508	13,800.2198
Class Z [Member]
General Partner Redeemable Units outstanding	412.4990	246.4190
Limited Partners Redeemable Units outstanding	22.3230	0

Condensed Schedule of Investmen

Condensed Schedule of Investments	Jun. 30, 2019USD ($)Derivative		Dec. 31, 2018USD ($)Derivative
Futures [Member]
Schedule of Investments [Line Items]
Net unrealized appreciation on open contracts	$ 1,376,254		$ 286,618
Percentage of Partners' Capital	3.68%		1.67%
Total unrealized appreciation on open contracts	$ 1,778,772		$ 561,881
Total unrealized depreciation on open contracts	(402,518)		(275,263)
Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ 1,533,987		$ 157,988
Percentage of Partners' Capital	4.10%		0.92%
Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Investment, Fair Value	$ (157,733)		$ 128,630
Percentage of Partners' Capital	(0.42%)		0.75%
Metals [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 31,345		$ 23,908
Total unrealized depreciation on open contracts	$ (20,125)		$ (400)
Metals [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	2		8
Investment, Fair Value	$ 28,310		$ 19,310
Percentage of Partners' Capital	0.08%		0.11%
Metals [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	25		7
Investment, Fair Value	$ (17,090)		$ 4,198
Percentage of Partners' Capital	(0.04%)		0.02%
Energy [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 120,653		$ 63,201
Total unrealized depreciation on open contracts	$ (32,699)		$ (83,350)
Energy [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	18		11
Investment, Fair Value	$ 113,169		$ (82,600)
Percentage of Partners' Capital	0.30%		(0.48%)
Energy [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	51		12
Investment, Fair Value	$ (25,215)		$ 62,451
Percentage of Partners' Capital	(0.07%)		0.36%
Grains [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 19,563		$ 67,071
Total unrealized depreciation on open contracts	$ (154,336)		$ (930)
Grains [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	68		1
Investment, Fair Value	$ (76,563)		$ (80)
Percentage of Partners' Capital	(0.20%)		(0.00%)
Grains [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	137		167
Investment, Fair Value	$ (58,210)		$ 66,221
Percentage of Partners' Capital	(0.15%)		0.39%
Indices [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 320,714		$ 67,303
Total unrealized depreciation on open contracts	$ (26,877)		$ (67,877)
Indices [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	299		16
Investment, Fair Value	$ 303,949		$ (13,698)
Percentage of Partners' Capital	0.81%		(0.08%)
Indices [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	109		89
Investment, Fair Value	$ (10,112)		$ 13,124
Percentage of Partners' Capital	(0.03%)		0.08%
Interest Rates U.S. [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 495,505		$ 40,484
Total unrealized depreciation on open contracts	$ (88,991)		$ (112,616)
Interest Rates U.S. [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	457		98
Investment, Fair Value	$ 492,935		$ 40,140
Percentage of Partners' Capital	1.32%		0.23%
Interest Rates U.S. [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	88		134
Investment, Fair Value	$ (86,421)		$ (112,272)
Percentage of Partners' Capital	(0.23%)		(0.65%)
Interest Rates Non-U.S. [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 736,338		$ 191,985
Total unrealized depreciation on open contracts	$ (27,402)		$ (8,061)
Interest Rates Non-U.S. [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	2,036		974
Investment, Fair Value	$ 671,947		$ 184,406
Percentage of Partners' Capital	1.79%		1.07%
Interest Rates Non-U.S. [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	243		10
Investment, Fair Value	$ 36,989		$ (482)
Percentage of Partners' Capital	0.10%		(0.00%)	[1]
Livestock [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 49,418		$ 30
Total unrealized depreciation on open contracts			$ (1,043)
Livestock [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	25		3
Investment, Fair Value	$ 49,418		$ (1,013)
Percentage of Partners' Capital	0.13%		(0.01%)
Softs [Member] | Futures [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	$ 5,236		$ 107,899
Total unrealized depreciation on open contracts	$ (52,088)		$ (986)
Softs [Member] | Contracts Purchased [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	7		10
Investment, Fair Value	$ 240		$ 10,510
Percentage of Partners' Capital	0.00%	[1]	0.07%
Softs [Member] | Contracts Sold [Member] | Futures [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	116		77
Investment, Fair Value	$ (47,092)		$ 96,403
Percentage of Partners' Capital	(0.13%)		0.56%
Forward Contracts [Member]
Schedule of Investments [Line Items]
Net unrealized appreciation on open contracts	$ (496,304)		$ 479,523
Percentage of Partners' Capital	(1.32%)		2.79%
Total unrealized appreciation on open contracts	$ 1,931,581		$ 1,333,455
Total unrealized depreciation on open contracts	(2,427,885)		(853,932)
Forward Contracts [Member] | Metals [Member]
Schedule of Investments [Line Items]
Total unrealized appreciation on open contracts	184,095		171,195
Total unrealized depreciation on open contracts	(355,890)		(126,750)
Forward Contracts [Member] | Currencies [Member]
Schedule of Investments [Line Items]
Notional	179,115,854		74,536,326
Total unrealized appreciation on open contracts	1,747,486		1,162,260
Notional	176,251,345		51,277,538
Total unrealized depreciation on open contracts	$ (2,071,995)		$ (727,182)
Unrealized Appreciation [Member] | Forward Contracts [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	5.16%		7.76%
Unrealized Appreciation [Member] | Forward Contracts [Member] | Metals [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	143		60
Percentage of Partners' Capital	0.49%		1.00%
Unrealized Appreciation [Member] | Forward Contracts [Member] | Currencies [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	4.67%		6.76%
Unrealized Depreciation [Member] | Forward Contracts [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	(6.48%)		(4.97%)
Unrealized Depreciation [Member] | Forward Contracts [Member] | Metals [Member]
Schedule of Investments [Line Items]
Number of Contracts | Derivative	192		42
Percentage of Partners' Capital	(0.95%)		(0.74%)
Unrealized Depreciation [Member] | Forward Contracts [Member] | Currencies [Member]
Schedule of Investments [Line Items]
Percentage of Partners' Capital	(5.53%)		(4.23%)
[1]	Due to rounding.

Statements of Income and Expens

Statements of Income and Expenses - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Investment Income:
Interest income		$ 199,091	$ 78,231	$ 386,595	$ 151,821
Total investment income		199,091	78,231	386,595	151,821
Expenses:
Clearing fees related to direct investments		62,461	19,207	120,400	38,914
Ongoing selling agent fees		187,536	99,090	372,363	207,421
Management fees		141,546	74,551	281,275	156,198
General Partner fees		84,927	49,700	168,765	104,131
Professional fees		64,489	69,800	141,325	140,990
Total expenses		540,959	312,348	1,084,128	647,654
Expenses borne by the General Partner		(20,314)	(44,789)	(51,156)	(88,497)
Net expenses		520,645	267,559	1,032,972	559,157
Net investment loss		(321,554)	(189,328)	(646,377)	(407,336)
Net gains (losses) on trading of commodity interests:
Net realized gains (losses) on closed contracts		2,781,868	(660,089)	3,770,655	(980,959)
Net change in unrealized gains (losses) on open contracts		(396,837)	337,847	113,361	103,221
Total trading results		2,385,031	(322,242)	3,884,016	(877,738)
Net income (loss)		2,063,477	(511,570)	3,237,639	(1,285,074)
Class A [Member]
Net gains (losses) on trading of commodity interests:
Net income (loss)		$ 2,034,788	$ (507,198)	$ 3,190,014	$ (1,276,238)
Net income (loss) per Redeemable Unit	[1]	$ 71.99	$ (32.02)	$ 111.95	$ (81.75)
Weighted average Redeemable Units outstanding		28,451.4631	15,393.8848	29,138.4600	15,665.6085
Class Z [Member]
Net gains (losses) on trading of commodity interests:
Net income (loss)		$ 28,689	$ (4,372)	$ 47,625	$ (8,836)
Net income (loss) per Redeemable Unit	[1]	$ 55.75	$ (17.74)	$ 88.40	$ (47.52)
Weighted average Redeemable Units outstanding		500.6847	246.4190	540.3633	254.7948
[1]	Represents the change in net asset value per Redeemable Unit during the period.

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]Limited Partners [Member]	Class Z [Member]General Partner [Member]
Partners' Capital, beginning of period at Dec. 31, 2017	$ 22,263,377			$ 21,985,171			$ 278,206
Partners' Capital, Redeemable Units, beginning of period at Dec. 31, 2017	16,480.3018			16,183.6278			296.6740
Subscriptions		$ 50,000			$ 50,000
Subscriptions, Redeemable Units		38.2040			38.2040
Redemptions		$ (1,711,403)	$ (50,000)		$ (1,711,403)				$ (50,000)
Redemptions, Redeemable Units		(1,302.8520)	(50.2550)		(1,302.8520)				(50.2550)
Net income (loss)	$ (1,285,074)			$ (1,276,238)			$ (8,836)
Partners' Capital, end of period at Jun. 30, 2018	$ 19,266,900			$ 19,047,530			$ 219,370
Partners' Capital, Redeemable Units, end of period at Jun. 30, 2018	15,165.3988			14,918.9798			246.4190
Partners' Capital, beginning of period at Mar. 31, 2018	$ 20,628,875			$ 20,405,133			$ 223,742
Partners' Capital, Redeemable Units, beginning of period at Mar. 31, 2018	15,837.7558			15,591.3368			246.4190
Subscriptions		$ 50,000			$ 50,000
Subscriptions, Redeemable Units		38.2040			38.2040
Redemptions		$ (900,405)			$ (900,405)
Redemptions, Redeemable Units		(710.5610)			(710.5610)
Net income (loss)	$ (511,570)			$ (507,198)			$ (4,372)
Partners' Capital, end of period at Jun. 30, 2018	$ 19,266,900			$ 19,047,530			$ 219,370
Partners' Capital, Redeemable Units, end of period at Jun. 30, 2018	15,165.3988			14,918.9798			246.4190
Partners' Capital, beginning of period at Dec. 31, 2018	$ 17,188,757			$ 16,975,265			$ 213,492
Partners' Capital, Redeemable Units, beginning of period at Dec. 31, 2018	14,046.6388			13,800.2198			246.4190
Subscriptions		$ 20,389,371	$ 269,705		$ 20,370,031	$ 0		$ 19,340	$ 269,705
Subscriptions, Redeemable Units		16,581.0830	311.3000		16,558.7600	0		22.3230	311.3000
Redemptions		$ (3,506,529)	$ (135,005)		$ (3,506,529)	$ 0		$ 0	$ (135,005)
Redemptions, Redeemable Units		(2,767.1290)	(145.2200)		(2,767.1290)	0		0	(145.2200)
Net income (loss)	$ 3,237,639			$ 3,190,014			$ 47,625
Partners' Capital, end of period at Jun. 30, 2019	$ 37,443,938			$ 37,028,781			$ 415,157
Partners' Capital, Redeemable Units, end of period at Jun. 30, 2019	28,026.6728			27,591.8508			434.8220
Partners' Capital, beginning of period at Mar. 31, 2019	$ 37,212,945			$ 36,691,472			$ 521,473
Partners' Capital, Redeemable Units, beginning of period at Mar. 31, 2019	29,470.3898			28,890.3478			580.0420
Subscriptions		$ 35,000			$ 35,000			$ 0
Subscriptions, Redeemable Units		27.1550			27.1550			0
Redemptions		$ (1,732,479)	$ (135,005)		$ (1,732,479)	$ 0		$ 0	$ (135,005)
Redemptions, Redeemable Units		(1,325.6520)	(145.2200)		(1,325.6520)	0		0	(145.2200)
Net income (loss)	$ 2,063,477			$ 2,034,788			$ 28,689
Partners' Capital, end of period at Jun. 30, 2019	$ 37,443,938			$ 37,028,781			$ 415,157
Partners' Capital, Redeemable Units, end of period at Jun. 30, 2019	28,026.6728			27,591.8508			434.8220

Organization

Organization	6 Months Ended
	Jun. 30, 2019
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. The General Partner is a wholly-owned During the reporting periods ended June 30, 2019 and 2018, the Partnership’s commodity broker was Morgan Stanley & Co. LLC (“MS&Co.”), a registered futures commission merchant. During prior reporting periods included in this report, the Partnership deposited a portion of its cash in non-trading 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 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. As of July 17, 2017, the Advisor commenced trading the Partnership’s assets directly pursuant to the Campbell Managed Futures Portfolio, a proprietary, systematic trading program. The General Partner is not aware of any material changes to the trading program other than as discussed above during the fiscal quarter ended June 30, 2019. The Partnership’s trading of futures, forward, swap and option contracts, if applicable, on commodities are done primarily on U.S. and foreign commodity exchanges. The Partnership engages in such trading through commodity brokerage accounts maintained with MS&Co. The Partnership has entered into a foreign exchange brokerage account agreement and a futures brokerage account agreement with MS&Co. The Partnership pays MS&Co. (or will reimburse MS&Co., if previously paid) its allocable share of all trading fees for the clearing and, where applicable, execution of transactions as well as exchange, user, give-up, The Partnership has also entered into a selling agent agreement with Morgan Stanley Wealth Management (as amended, the “Selling Agreement”). Pursuant to the Selling Agreement, Morgan Stanley Wealth Management receives a monthly ongoing selling agent fee equal to 2.0% per year of the Partnership’s adjusted month-end Effective January 1, 2019, the General Partner fee was reduced to 1/12 of 0.90% (0.90% per year) of month-end Effective January 1, 2017, the General Partner instituted a cap on the Partnership’s operating expenses such that the General Partner will be responsible for any such expenses to the extent they exceed 0.50% of the Partnership’s net assets in any calendar year. 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	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	2. Basis of Presentation and Summary of Significant Accounting Policies: The accompanying financial statements and accompanying notes are unaudited but, in the opinion of the General Partner, include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the Partnership’s financial condition at June 30, 2019, the results of its operations and the changes in partners’ capital for the three and six months ended June 30, 2019 and 2018. These financial statements present the results for interim periods and do not include all disclosures normally provided in annual financial statements. These financial statements should be read together with the financial statements and notes included in the Partnership’s Annual Report on Form 10-K Due to the nature of commodity trading, the results of operations for the interim periods presented should not be considered indicative of the results that may be expected for the entire year. Use of Estimates. Profit Allocation. Statement of Cash Flows. “Statement of Cash Flows.” Partnership’s Investments. All commodity interests of the Partnership, including derivative financial instruments and derivative commodity instruments, are held for trading purposes. The commodity interests for the Partnership are recorded on the trade date and open contracts are recorded at fair value (as described in Note 5, “Fair Value Measurements”) at the measurement date. The Partnership’s investments in commodity interests denominated in foreign currencies are translated into U.S. dollars at the exchange rates prevailing at the measurement date. Gains or losses for the Partnership are realized when contracts are liquidated and are determined using the first-in, first-out The Partnership does not isolate the portion of the results of operations arising from the effect of changes in foreign exchange rates on investments from fluctuations from changes in market prices of investments held. Such fluctuations are included in total trading results in the Partnership’s Statements of Income and Expenses. Partnership’s Cash. Income Taxes. “Income Taxes,” “more-likely-than-not” more-likely-than-not 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. “Financial Services – Investment Companies.” There have been no material changes with respect to the Partnership’s critical accounting policies as reported in the Partnership’s Annual Report on Form 10-K

Financial Highlights

Financial Highlights	6 Months Ended
	Jun. 30, 2019
Investment Company [Abstract]
Financial Highlights	3. Financial Highlights: Financial highlights for the limited partner class as a whole for the three and six months ended June 30, 2019 and 2018 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Class A Class Z Class A Class A Class Z Class A Per Redeemable Unit Performance (for a unit oustanding throughout the period): * Net realized and unrealized gains (losses) $ 83.23 $ 59.03 $ (19.79) $ 134.01 $ 94.95 $ (55.89) Net investment loss (11.24) (3.28) (12.23) (22.06) (6.55) (25.86) Increase (decrease) for the period 71.99 55.75 (32.02) 111.95 88.40 (81.75) Net asset value per Redeemable Unit, beginning of period 1,270.03 899.03 1,308.75 1,230.07 866.38 1,358.48 Net asset value per Redeemable Unit, end of period $ 1,342.02 $ 954.78 $ 1,276.73 $ 1,342.02 $ 954.78 $ 1,276.73 Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Class A Class Z Class A Class A Class Z Class A Ratios to Average Limited Partners’ Capital: ** Net investment loss *** (3.5) % (1.4) % (3.9) % (3.6) % (1.5) % (4.0) % Operating expenses before expenses borne by the General Partner and incentive fees 5.9 % 3.8 % 6.3 % 5.9 % 3.8 % 6.3 % Expenses borne by the General Partner (0.2) % (0.2) % (0.9) % (0.3) % (0.3) % (0.9) % Incentive fees - % - % - % - % - % - % Operating expenses after expenses borne by the General Partner and incentive fees 5.7 % 3.6 % 5.4 % 5.6 % 3.5 % 5.4 % Total return: Total return before incentive fees 5.7 % 6.2 % (2.4) % 9.1 % 10.2 % (6.0) % Incentive fees - % - % - % - % - % - % Total return after incentive fees 5.7 % 6.2 % (2.4) % 9.1 % 10.2 % (6.0) % * 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. ** Annualized (other than incentive fees). *** Interest income less total expenses. The above ratios and total return may vary for individual investors based on the timing of capital transactions during the period.

Trading Activities

Trading Activities	6 Months Ended
	Jun. 30, 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 interests. The Partnership’s results of trading activities are shown on the Statements of Income and Expenses. The futures brokerage account agreements with MS&Co. give the Partnership the legal right to net unrealized gains and losses on open futures and forward contracts. The Partnership nets, for financial reporting purposes, the unrealized gains and losses on open futures and forward contracts in the 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. All of the commodity interests owned by the Partnership are held for trading purposes. The monthly average number of futures contracts traded by the Partnership during the three months ended June 30, 2019 and 2018 were 3,643 and 1,346, respectively. The monthly average number of futures contracts traded by the Partnership during the six months ended June 30, 2019 and 2018 were 3,516 and 1,348, respectively. The monthly average number of metals forward contracts traded by the Partnership during the three months ended June 30, 2019 and 2018 were 495 and 182, respectively. The monthly average number of metals forward contracts traded by the Partnership during the six months ended June 30, 2019 and 2018 were 428 and 156, respectively. The monthly average notional values of currency forward contracts traded by the Partnership during the three months ended June 30, 2019 and 2018 were $760,666,346 and $173,399,278, respectively. The monthly average notional values of currency forward contracts traded by the Partnership during the six months ended June 30, 2019 and 2018 were $669,368,344 and $161,799,446, respectively. The following tables summarize 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 June 30, 2019 and December 31, 2018, respectively. Gross Amounts Amounts Gross Amounts Not Offset in the June 30, 2019 Gross Amounts Statements of Financial Condition Statements of Financial Cash Collateral Pledged * Net Amount Assets Futures $ 1,778,772 $ (402,518 ) $ 1,376,254 $ - $ - $ 1,376,254 Forwards 1,931,581 (1,931,581 ) - - - - Total assets $ 3,710,353 $ (2,334,099 ) $ 1,376,254 $ - $ - $ 1,376,254 Liabilities Futures $ (402,518 ) $ 402,518 $ - $ - $ - $ - Forwards (2,427,885 ) 1,931,581 (496,304 ) - 496,304 - Total liabilities $ (2,830,403 ) $ 2,334,099 $ (496,304 ) $ - $ 496,304 $ - Net fair value $ 1,376,254 * Gross Amounts Amounts Gross Amounts Not Offset in the Statements of Financial Condition December 31, 2018 Gross Amounts Statements of Financial Statements of Financial Cash Collateral Pledged * Net Amount Assets Futures $ 561,881 $ (275,263 ) $ 286,618 $ - $ - $ 286,618 Forwards 1,333,455 (853,932 ) 479,523 - - 479,523 Total assets $ 1,895,336 $ (1,129,195 ) $ 766,141 $ - $ - $ 766,141 Liabilities Futures $ (275,263 ) $ 275,263 $ - $ - $ - $ - Forwards (853,932 ) 853,932 - - - - Total liabilities $ (1,129,195 ) $ 1,129,195 $ - $ - $ - $ - Net fair value $ 766,141 * * 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 separate assets and liabilities for the Partnership as of June 30, 2019 and December 31, 2018, respectively. June 30, 2019 Assets Futures Contracts Energy $ 120,653 Grains 19,563 Indices 320,714 Interest Rates U.S. 495,505 Interest Rates Non-U.S. 736,338 Livestock 49,418 Metals 31,345 Softs 5,236 Total unrealized appreciation on open futures contracts 1,778,772 Liabilities Futures Contracts Energy (32,699) Grains (154,336) Indices (26,877) Interest Rates U.S. (88,991) Interest Rates Non-U.S. (27,402) Metals (20,125) Softs (52,088) Total unrealized depreciation on open futures contracts (402,518) Net unrealized appreciation on open futures contracts $ 1,376,254 * Assets Forward Contracts Currencies $ 1,747,486 Metals 184,095 Total unrealized appreciation on open forward contracts 1,931,581 Liabilities Forward Contracts Currencies (2,071,995) Metals (355,890) Total unrealized depreciation on open forward contracts (2,427,885) Net unrealized depreciation on open forward contracts $ (496,304) ** * 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 depreciation on open forward contracts” in the Partnership’s Statements of Financial Condition. December 31, 2018 Assets Futures Contracts Energy $ 63,201 Grains 67,071 Indices 67,303 Interest Rates U.S. 40,484 Interest Rates Non-U.S. 191,985 Livestock 30 Metals 23,908 Softs 107,899 Total unrealized appreciation on open futures contracts 561,881 Liabilities Futures Contracts Energy (83,350) Grains (930) Indices (67,877) Interest Rates U.S. (112,616) Interest Rates Non-U.S. (8,061) Livestock (1,043) Metals (400) Softs (986) Total unrealized depreciation on open futures contracts (275,263) Net unrealized appreciation on open futures contracts $ 286,618 * Assets Forward Contracts Currencies $ 1,162,260 Metals 171,195 Total unrealized appreciation on open forward contracts 1,333,455 Liabilities Forward Contracts Currencies (727,182) Metals (126,750) Total unrealized depreciation on open forward contracts (853,932) Net unrealized appreciation on open forward contracts $ 479,523 ** * 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 three and six months ended June 30, 2019 and 2018, respectively. Three Months Ended June 30, Six Months Ended June 30, Sector 2019 2018 2019 2018 Currencies $ (356,252) $ (125,428) $ (771,454) $ 50,702 Energy 40,156 445,777 (447,741) 548,610 Grains (796,003) 75,268 (421,397) (313,627) Indices 1,126,739 (64,159) 1,924,992 (1,060,351) Interest Rates U.S. 493,918 92,543 922,219 370,225 Interest Rates Non-U.S. 1,997,620 (88,965) 3,283,904 (2,033) Livestock 158,235 (121,710) 110,752 (84,093) Metals (341,991) (421,851) (572,456) (459,083) Softs 62,609 (113,717) (144,803) 71,912 Total $ 2,385,031 * $ (322,242) * $ 3,884,016 * (877,738) * * This amount is in “Total trading results” in the Partnership’s Statements of Income and Expenses.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	5. Fair Value Measurements: Partnership’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 prices for commodity futures, exchange-traded 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 June 30, 2019 Total Level 1 Level 2 Level 3 Assets Futures $ 1,778,772 $ 1,778,772 $ - $ - Forwards 1,931,581 - 1,931,581 - Total assets $ 3,710,353 $ 1,778,772 $ 1,931,581 $ - Liabilities Futures $ 402,518 $ 402,518 $ - $ - Forwards 2,427,885 - 2,427,885 - Total liabilities $ 2,830,403 $ 402,518 $ 2,427,885 $ - December 31, 2018 Total Level 1 Level 2 Level 3 Assets Futures $ 561,881 $ 561,881 $ - $ - Forwards 1,333,455 - 1,333,455 - Total assets $ 1,895,336 $ 561,881 $ 1,333,455 $ - Liabilities Futures $ 275,263 $ 275,263 $ - $ - Forwards 853,932 - 853,932 - Total liabilities $ 1,129,195 $ 275,263 $ 853,932 $ -

Financial Instrument Risks

Financial Instrument Risks	6 Months Ended
	Jun. 30, 2019
Investments, All Other Investments [Abstract]
Financial Instrument Risks	6. Financial Instrument Risks: In the normal course of business, the Partnership is party to financial instruments with off-balance-sheet 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 that are traded by the Partnership due to market changes, including interest and foreign exchange rate movements and fluctuations in commodity or security prices. The Partnership’s market risk is directly impacted by the volatility and liquidity in the markets in which the related underlying assets are or were traded. The Partnership is exposed to market risk equal to the value of the 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 typically limited to the amounts recognized in the Statements of Financial Condition and is not, for the Partnership, represented by the contract or notional amounts of the instruments. The risk of loss for the Partnership is reduced through the use of legally enforceable master netting agreements with counterparties that permit the Partnership to offset unrealized gains and losses and other assets and liabilities with such counterparties upon the occurrence of certain events. The Partnership has credit risk and concentration risk, as MS&Co. or an MS&Co. affiliate is the sole counterparty or broker with respect to the Partnership’s assets. Credit risk with respect to exchange-traded instruments for the Partnership is reduced to the extent that, through MS&Co. or an MS&Co. affiliate, the Partnership’s counterparty is an exchange or clearing organization. The General Partner monitors and attempts to mitigate the Partnership’s 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 may be subject. These monitoring systems generally allow the General Partner to statistically analyze actual trading results with risk-adjusted 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. 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. In the ordinary course of business, the Partnership enters into contracts and agreements that contain various representations and warranties and which provide general indemnifications. The Partnership’s maximum exposure under these arrangements cannot be determined, as this could include future claims that have not yet been made against the Partnership. The Partnership considers the risk of any future obligation relating to these indemnifications to be remote.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	7. 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 Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 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 Investments	Partnership’s Investments. All commodity interests of the Partnership, including derivative financial instruments and derivative commodity instruments, are held for trading purposes. The commodity interests for the Partnership are recorded on the trade date and open contracts are recorded at fair value (as described in Note 5, “Fair Value Measurements”) at the measurement date. The Partnership’s investments in commodity interests denominated in foreign currencies are translated into U.S. dollars at the exchange rates prevailing at the measurement date. Gains or losses for the Partnership are realized when contracts are liquidated and are determined using the first-in, first-out The Partnership does not isolate the portion of the results of operations arising from the effect of changes in foreign exchange rates on investments from fluctuations from changes in market prices of investments held. Such fluctuations are included in total trading results in the Partnership’s 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.”

Financial Highlights (Tables)

Financial Highlights (Tables)	6 Months Ended
	Jun. 30, 2019
Investment Company [Abstract]
Financial Highlights for Limited Partner Class	Financial highlights for the limited partner class as a whole for the three and six months ended June 30, 2019 and 2018 were as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Class A Class Z Class A Class A Class Z Class A Per Redeemable Unit Performance (for a unit oustanding throughout the period): * Net realized and unrealized gains (losses) $ 83.23 $ 59.03 $ (19.79) $ 134.01 $ 94.95 $ (55.89) Net investment loss (11.24) (3.28) (12.23) (22.06) (6.55) (25.86) Increase (decrease) for the period 71.99 55.75 (32.02) 111.95 88.40 (81.75) Net asset value per Redeemable Unit, beginning of period 1,270.03 899.03 1,308.75 1,230.07 866.38 1,358.48 Net asset value per Redeemable Unit, end of period $ 1,342.02 $ 954.78 $ 1,276.73 $ 1,342.02 $ 954.78 $ 1,276.73 Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Class A Class Z Class A Class A Class Z Class A Ratios to Average Limited Partners’ Capital: ** Net investment loss *** (3.5) % (1.4) % (3.9) % (3.6) % (1.5) % (4.0) % Operating expenses before expenses borne by the General Partner and incentive fees 5.9 % 3.8 % 6.3 % 5.9 % 3.8 % 6.3 % Expenses borne by the General Partner (0.2) % (0.2) % (0.9) % (0.3) % (0.3) % (0.9) % Incentive fees - % - % - % - % - % - % Operating expenses after expenses borne by the General Partner and incentive fees 5.7 % 3.6 % 5.4 % 5.6 % 3.5 % 5.4 % Total return: Total return before incentive fees 5.7 % 6.2 % (2.4) % 9.1 % 10.2 % (6.0) % Incentive fees - % - % - % - % - % - % Total return after incentive fees 5.7 % 6.2 % (2.4) % 9.1 % 10.2 % (6.0) % * 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. ** Annualized (other than incentive fees). *** Interest income less total expenses.

Trading Activities (Tables)

Trading Activities (Tables)	6 Months Ended
	Jun. 30, 2019
Brokers and Dealers [Abstract]
Summary of Valuation of Investments	The following tables summarize 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 June 30, 2019 and December 31, 2018, respectively. Gross Amounts Amounts Gross Amounts Not Offset in the June 30, 2019 Gross Amounts Statements of Financial Condition Statements of Financial Cash Collateral Pledged * Net Amount Assets Futures $ 1,778,772 $ (402,518 ) $ 1,376,254 $ - $ - $ 1,376,254 Forwards 1,931,581 (1,931,581 ) - - - - Total assets $ 3,710,353 $ (2,334,099 ) $ 1,376,254 $ - $ - $ 1,376,254 Liabilities Futures $ (402,518 ) $ 402,518 $ - $ - $ - $ - Forwards (2,427,885 ) 1,931,581 (496,304 ) - 496,304 - Total liabilities $ (2,830,403 ) $ 2,334,099 $ (496,304 ) $ - $ 496,304 $ - Net fair value $ 1,376,254 * Gross Amounts Amounts Gross Amounts Not Offset in the Statements of Financial Condition December 31, 2018 Gross Amounts Statements of Financial Statements of Financial Cash Collateral Pledged * Net Amount Assets Futures $ 561,881 $ (275,263 ) $ 286,618 $ - $ - $ 286,618 Forwards 1,333,455 (853,932 ) 479,523 - - 479,523 Total assets $ 1,895,336 $ (1,129,195 ) $ 766,141 $ - $ - $ 766,141 Liabilities Futures $ (275,263 ) $ 275,263 $ - $ - $ - $ - Forwards (853,932 ) 853,932 - - - - Total liabilities $ (1,129,195 ) $ 1,129,195 $ - $ - $ - $ - Net fair value $ 766,141 * * 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 tables indicate the gross fair values of derivative instruments of futures and forward contracts as separate assets and liabilities for the Partnership as of June 30, 2019 and December 31, 2018, respectively. June 30, 2019 Assets Futures Contracts Energy $ 120,653 Grains 19,563 Indices 320,714 Interest Rates U.S. 495,505 Interest Rates Non-U.S. 736,338 Livestock 49,418 Metals 31,345 Softs 5,236 Total unrealized appreciation on open futures contracts 1,778,772 Liabilities Futures Contracts Energy (32,699) Grains (154,336) Indices (26,877) Interest Rates U.S. (88,991) Interest Rates Non-U.S. (27,402) Metals (20,125) Softs (52,088) Total unrealized depreciation on open futures contracts (402,518) Net unrealized appreciation on open futures contracts $ 1,376,254 * Assets Forward Contracts Currencies $ 1,747,486 Metals 184,095 Total unrealized appreciation on open forward contracts 1,931,581 Liabilities Forward Contracts Currencies (2,071,995) Metals (355,890) Total unrealized depreciation on open forward contracts (2,427,885) Net unrealized depreciation on open forward contracts $ (496,304) ** * 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 depreciation on open forward contracts” in the Partnership’s Statements of Financial Condition. December 31, 2018 Assets Futures Contracts Energy $ 63,201 Grains 67,071 Indices 67,303 Interest Rates U.S. 40,484 Interest Rates Non-U.S. 191,985 Livestock 30 Metals 23,908 Softs 107,899 Total unrealized appreciation on open futures contracts 561,881 Liabilities Futures Contracts Energy (83,350) Grains (930) Indices (67,877) Interest Rates U.S. (112,616) Interest Rates Non-U.S. (8,061) Livestock (1,043) Metals (400) Softs (986) Total unrealized depreciation on open futures contracts (275,263) Net unrealized appreciation on open futures contracts $ 286,618 * Assets Forward Contracts Currencies $ 1,162,260 Metals 171,195 Total unrealized appreciation on open forward contracts 1,333,455 Liabilities Forward Contracts Currencies (727,182) Metals (126,750) Total unrealized depreciation on open forward contracts (853,932) Net unrealized appreciation on open forward contracts $ 479,523 ** * 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 three and six months ended June 30, 2019 and 2018, respectively. Three Months Ended June 30, Six Months Ended June 30, Sector 2019 2018 2019 2018 Currencies $ (356,252) $ (125,428) $ (771,454) $ 50,702 Energy 40,156 445,777 (447,741) 548,610 Grains (796,003) 75,268 (421,397) (313,627) Indices 1,126,739 (64,159) 1,924,992 (1,060,351) Interest Rates U.S. 493,918 92,543 922,219 370,225 Interest Rates Non-U.S. 1,997,620 (88,965) 3,283,904 (2,033) Livestock 158,235 (121,710) 110,752 (84,093) Metals (341,991) (421,851) (572,456) (459,083) Softs 62,609 (113,717) (144,803) 71,912 Total $ 2,385,031 * $ (322,242) * $ 3,884,016 * (877,738) * * This amount is in “Total trading results” in the Partnership’s Statements of Income and Expenses.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Derivative Instrument Fair Value Based on Hierarchy	June 30, 2019 Total Level 1 Level 2 Level 3 Assets Futures $ 1,778,772 $ 1,778,772 $ - $ - Forwards 1,931,581 - 1,931,581 - Total assets $ 3,710,353 $ 1,778,772 $ 1,931,581 $ - Liabilities Futures $ 402,518 $ 402,518 $ - $ - Forwards 2,427,885 - 2,427,885 - Total liabilities $ 2,830,403 $ 402,518 $ 2,427,885 $ - December 31, 2018 Total Level 1 Level 2 Level 3 Assets Futures $ 561,881 $ 561,881 $ - $ - Forwards 1,333,455 - 1,333,455 - Total assets $ 1,895,336 $ 561,881 $ 1,333,455 $ - Liabilities Futures $ 275,263 $ 275,263 $ - $ - Forwards 853,932 - 853,932 - Total liabilities $ 1,129,195 $ 275,263 $ 853,932 $ -

Organization - Additional Infor

Organization - Additional Information (Detail) - $ / shares	Jan. 01, 2019	Jan. 01, 2017	Jun. 30, 2019	Jul. 01, 2016
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage of General Partner fee	0.90%
Morgan Stanley Wealth Management [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Ongoing selling agent fee			2.00%
Class Z [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Redeemable units per share				$ 1,000
Minimum [Member] | General Partner [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage of expenses to net assets to be covered by General Partner		0.50%

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Cash held for margin requirements	$ 10,055,607	$ 3,230,953
Cash denominated in foreign currencies	1,144,892	380,451
Cost of foreign currencies	1,144,797	$ 379,908
Uncertain tax position	$ 0
Open tax year	2015 2016 2017 2018

Financial Highlights - Financia

Financial Highlights - Financial Highlights for Limited Partner Class (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Class A [Member]
Per Redeemable Unit Performance (for a unit oustanding throughout the period):
Net asset value per Redeemable Unit, beginning of period			$ 1,230.07
Net asset value per Redeemable Unit, end of period	$ 1,342.02		1,342.02
Class A [Member] | Limited Partners [Member]
Per Redeemable Unit Performance (for a unit oustanding throughout the period):
Net realized and unrealized gains (losses)	83.23	$ (19.79)	134.01	$ (55.89)
Net investment loss	(11.24)	(12.23)	(22.06)	(25.86)
Increase (decrease) for the period	71.99	(32.02)	111.95	(81.75)
Net asset value per Redeemable Unit, beginning of period	1,270.03	1,308.75	1,230.07	1,358.48
Net asset value per Redeemable Unit, end of period	$ 1,342.02	$ 1,276.73	$ 1,342.02	$ 1,276.73
Ratios to Average Limited Partners' Capital:
Net investment loss	(3.50%)	(3.90%)	(3.60%)	(4.00%)
Operating expenses before expenses borne by the General Partner and incentive fees	5.90%	6.30%	5.90%	6.30%
Expenses borne by the General Partner	(0.20%)	(0.90%)	(0.30%)	(0.90%)
Incentive fees	0.00%	0.00%	0.00%	0.00%
Operating expenses after expenses borne by the General Partner and incentive fees	5.70%	5.40%	5.60%	5.40%
Total return:
Total return before incentive fees	5.70%	(2.40%)	9.10%	(6.00%)
Incentive fees	0.00%	0.00%	0.00%	0.00%
Total return after incentive fees	5.70%	(2.40%)	9.10%	(6.00%)
Class Z [Member]
Per Redeemable Unit Performance (for a unit oustanding throughout the period):
Net asset value per Redeemable Unit, beginning of period			$ 866.38
Net asset value per Redeemable Unit, end of period	$ 954.78		954.78
Class Z [Member] | Limited Partners [Member]
Per Redeemable Unit Performance (for a unit oustanding throughout the period):
Net realized and unrealized gains (losses)	59.03		94.95
Net investment loss	(3.28)		(6.55)
Increase (decrease) for the period	55.75		88.40
Net asset value per Redeemable Unit, beginning of period	899.03		866.38
Net asset value per Redeemable Unit, end of period	$ 954.78		$ 954.78
Ratios to Average Limited Partners' Capital:
Net investment loss	(1.40%)		(1.50%)
Operating expenses before expenses borne by the General Partner and incentive fees	3.80%		3.80%
Expenses borne by the General Partner	(0.20%)		(0.30%)
Incentive fees	0.00%		0.00%
Operating expenses after expenses borne by the General Partner and incentive fees	3.60%		3.50%
Total return:
Total return before incentive fees	6.20%		10.20%
Incentive fees	0.00%		0.00%
Total return after incentive fees	6.20%		10.20%

Trading Activities - Additional

Trading Activities - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)Contract	Jun. 30, 2018USD ($)Contract	Jun. 30, 2019USD ($)Contract	Jun. 30, 2018USD ($)Contract
Trading Activity, Gains and Losses, Net [Line Items]
Monthly average number of futures contracts traded	3,643		3,516
Monthly average number of metals forward contracts traded	495		428
Forward Contracts [Member] | Currencies [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Average notional values of currency forward contracts | $	$ 760,666,346		$ 669,368,344
CMF Campbell Master Fund L.P. [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Monthly average number of futures contracts traded		1,346		1,348
Monthly average number of metals forward contracts traded		182		156
CMF Campbell Master Fund L.P. [Member] | Forward Contracts [Member] | Currencies [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Average notional values of currency forward contracts | $		$ 173,399,278		$ 161,799,446

Trading Activities - Summary of

Trading Activities - Summary of Valuation of Investments (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Gross Amounts Recognized, Assets	$ 3,710,353	$ 1,895,336
Gross Amounts Offset in the Statements of Financial Condition, Assets	(2,334,099)	(1,129,195)
Amounts Presented in the Statements of Financial Condition, Assets	1,376,254	766,141
Financial Instruments, Assets	0	0
Collateral Received/Pledged, Assets	0	0
Net Amount, Assets	1,376,254	766,141
Gross Amounts Recognized, Liabilities	(2,830,403)	(1,129,195)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	2,334,099	1,129,195
Amounts Presented in the Statements of Financial Condition, Liabilities	(496,304)	0
Financial Instruments, Liabilities	0	0
Collateral Received/Pledged, Liabilities	496,304	0
Net Amount, Liabilities	0	0
Net fair value	1,376,254	766,141
Futures [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	1,778,772	561,881
Gross Amounts Offset in the Statements of Financial Condition, Assets	(402,518)	(275,263)
Amounts Presented in the Statements of Financial Condition, Assets	1,376,254	286,618
Financial Instruments, Assets	0	0
Collateral Received/Pledged, Assets	0	0
Net Amount, Assets	1,376,254	286,618
Gross Amounts Recognized, Liabilities	(402,518)	(275,263)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	402,518	275,263
Amounts Presented in the Statements of Financial Condition, Liabilities	0	0
Financial Instruments, Liabilities	0	0
Collateral Received/Pledged, Liabilities	0	0
Net Amount, Liabilities	0	0
Forward Contracts [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	1,931,581	1,333,455
Gross Amounts Offset in the Statements of Financial Condition, Assets	(1,931,581)	(853,932)
Amounts Presented in the Statements of Financial Condition, Assets	0	479,523
Financial Instruments, Assets	0	0
Collateral Received/Pledged, Assets	0	0
Net Amount, Assets	0	479,523
Gross Amounts Recognized, Liabilities	(2,427,885)	(853,932)
Gross Amounts Offset in the Statements of Financial Condition, Liabilities	1,931,581	853,932
Amounts Presented in the Statements of Financial Condition, Liabilities	(496,304)	0
Financial Instruments, Liabilities	0	0
Collateral Received/Pledged, Liabilities	496,304	0
Net Amount, Liabilities	$ 0	$ 0

Trading Activities - Gross Fair

Trading Activities - Gross Fair Values of Derivative Instruments of Futures and Forward Contracts as Separate Assets and Liabilities (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Futures [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	$ 1,778,772	$ 561,881
Total unrealized depreciation on open contracts	(402,518)	(275,263)
Net unrealized appreciation on open contracts	1,376,254	286,618
Futures [Member] | Energy [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	120,653	63,201
Total unrealized depreciation on open contracts	(32,699)	(83,350)
Futures [Member] | Grains [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	19,563	67,071
Total unrealized depreciation on open contracts	(154,336)	(930)
Futures [Member] | Indices [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	320,714	67,303
Total unrealized depreciation on open contracts	(26,877)	(67,877)
Futures [Member] | Interest Rates U.S. [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	495,505	40,484
Total unrealized depreciation on open contracts	(88,991)	(112,616)
Futures [Member] | Interest Rates Non-U.S. [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	736,338	191,985
Total unrealized depreciation on open contracts	(27,402)	(8,061)
Futures [Member] | Livestock [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	49,418	30
Total unrealized depreciation on open contracts		(1,043)
Futures [Member] | Metals [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	31,345	23,908
Total unrealized depreciation on open contracts	(20,125)	(400)
Futures [Member] | Softs [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	5,236	107,899
Total unrealized depreciation on open contracts	(52,088)	(986)
Forward Contracts [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	1,931,581	1,333,455
Total unrealized depreciation on open contracts	(2,427,885)	(853,932)
Net unrealized appreciation on open contracts	(496,304)	479,523
Forward Contracts [Member] | Metals [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	184,095	171,195
Total unrealized depreciation on open contracts	(355,890)	(126,750)
Forward Contracts [Member] | Currencies [Member]
Derivative [Line Items]
Total unrealized appreciation on open contracts	1,747,486	1,162,260
Total unrealized depreciation on open contracts	$ (2,071,995)	$ (727,182)

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 ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative [Line Items]
Trading gains and losses	$ 2,385,031	$ (322,242)	$ 3,884,016	$ (877,738)
Currencies [Member]
Derivative [Line Items]
Trading gains and losses	(356,252)	(125,428)	(771,454)	50,702
Energy [Member]
Derivative [Line Items]
Trading gains and losses	40,156	445,777	(447,741)	548,610
Grains [Member]
Derivative [Line Items]
Trading gains and losses	(796,003)	75,268	(421,397)	(313,627)
Indices [Member]
Derivative [Line Items]
Trading gains and losses	1,126,739	(64,159)	1,924,992	(1,060,351)
Interest Rates U.S. [Member]
Derivative [Line Items]
Trading gains and losses	493,918	92,543	922,219	370,225
Interest Rates Non-U.S. [Member]
Derivative [Line Items]
Trading gains and losses	1,997,620	(88,965)	3,283,904	(2,033)
Livestock [Member]
Derivative [Line Items]
Trading gains and losses	158,235	(121,710)	110,752	(84,093)
Metals [Member]
Derivative [Line Items]
Trading gains and losses	(341,991)	(421,851)	(572,456)	(459,083)
Softs [Member]
Derivative [Line Items]
Trading gains and losses	$ 62,609	$ (113,717)	$ (144,803)	$ 71,912

Fair Value Measurements - Deriv

Fair Value Measurements - Derivative Instrument Fair Value Based on Hierarchy (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 3,710,353	$ 1,895,336
Derivative liabilities	2,830,403	1,129,195
Futures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,778,772	561,881
Derivative liabilities	402,518	275,263
Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,931,581	1,333,455
Derivative liabilities	2,427,885	853,932
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,778,772	561,881
Derivative liabilities	402,518	275,263
Level 1 [Member] | Futures [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,778,772	561,881
Derivative liabilities	402,518	275,263
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,931,581	1,333,455
Derivative liabilities	2,427,885	853,932
Level 2 [Member] | Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,931,581	1,333,455
Derivative liabilities	$ 2,427,885	$ 853,932

Financial Instrument Risks - Ad

Financial Instrument Risks - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019
Concentration Risk [Line Items]
Financial instruments maturity period	1 year
Credit Concentration Risk [Member] | Partnership's Contracts [Member] | Over the Counter [Member] | Minimum [Member]
Concentration Risk [Line Items]
Concentration risk percentage	50.00%
Credit Concentration Risk [Member] | Partnership's Contracts [Member] | Over the Counter [Member] | Maximum [Member]
Concentration Risk [Line Items]
Concentration risk percentage	64.40%