Potomac Futures Fund (POTO) 10-K 30 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 28, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	poto
Entity Registrant Name	POTOMAC FUTURES FUND LP
Entity Central Index Key	1043565
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Limited Partnership Units Outstanding		17,349.35
Entity Public Float			$25,458,428

Statements_of_Financial_Condit

Statements of Financial Condition (USD $)	Dec. 31, 2014	Dec. 31, 2013
Assets:
Investment in Master, at fair value (Note 1)	$30,700,788	$30,747,092
Cash (Note 3c)	132,084	53,216
Total assets	30,832,872	30,800,308
Accrued expenses:
Ongoing selling agent fees (Note 3c)	51,388	141,168
Management fees (Note 3b)	38,353	50,991
Administrative fees (Note 3a)	25,569
Professional fees	75,088	49,701
Other	24,133	14,913
Redemptions Payable (Note 5)	375,913	440,330
Total liabilities	590,444	697,103
Partners' Capital: (Notes 1 and 5)
General Partner, 192.5786 and 265.4926 unit equivalents outstanding at December 31, 2014 and 2013	322,878	374,692
Limited Partners, 17,845.3078 and 21,064.5228 Redeemable Units outstanding at December 31, 2014 and 2013, respectively	29,919,550	29,728,513
Total partners' capital	30,242,428	30,103,205
Total liabilities and partners' capital	$30,832,872	$30,800,308
Net asset value per unit	1,676.61	1,411.31

Statements_of_Financial_Condit1

Statements of Financial Condition (Parenthetical)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
General Partner outstanding	192.5786	265.4926
Limited Partners Redeemable Units outstanding	17,845.31	21,064.52

Statements_of_Income_and_Expen

Statements of Income and Expenses (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Investment Income:
Interest income allocated from Master (Note 3c)	$4,188		$8,604		$17,225
Expenses:
Expenses allocated from Master	284,680		285,386		219,721
Ongoing selling agent fees (Note 3c)	970,036		1,701,230		2,011,292
Management fees (Note 3b)	485,268		613,859		725,134
Administrative fees (Note 3a)	73,710
Professional fees	177,459		177,086		86,107
Other	50,941		49,246		68,641
Total expenses	2,042,094		2,826,807		3,110,895
Net investment income (loss)	-2,037,906		-2,818,203		-3,093,670
Trading Results:
Net realized gains (losses) on closed contracts allocated from Master	5,907,663		4,756,101		3,763,236
Change in net unrealized gains (losses) on open contracts allocated from Master	556,997		163,087		-766,462
Total trading results allocated from Master	6,464,660		4,919,188		2,996,774
Net income (loss)	$4,426,754		$2,100,985		($96,896)
Net income (loss) per unit (Note 6)	$265.30	[1]	$98.58	[1]	($17.31)	[1]
Weighted average units outstanding	20,587.93		21,688.72		26,495.10
[1]	Based on change in net asset value per unit.

Statements_of_Changes_in_Partn

Statements of Changes in Partners' Capital (USD $)	Total	Limited Partners [Member]	General Partner [Member]
Beginning balance at Dec. 31, 2011	$39,484,744	$39,035,865	$448,879
Net income (loss)	-96,896	-96,974	78
Subscriptions of 1,179.5450, 7,217.7550 and 2,757.6500 Redeemable Units for the years 2012, 2013 and 2014	1,596,577	1,596,577
Redemptions of 8,631.6848, 8,050.3990, 5,976.8650 Redeemable Units for the years 2012, 2013 and 2014 and 72.0000, 72.9140 General Partner unit equivalents for the years 2012 and 2014	-11,890,867	-11,790,430	-100,437
Net asset value per unit	1,312.73
Balance ending at Dec. 31, 2012	29,093,558	28,745,038	348,520
Net income (loss)	2,100,985	2,074,813	26,172
Subscriptions of 1,179.5450, 7,217.7550 and 2,757.6500 Redeemable Units for the years 2012, 2013 and 2014	10,199,904	10,199,904
Redemptions of 8,631.6848, 8,050.3990, 5,976.8650 Redeemable Units for the years 2012, 2013 and 2014 and 72.0000, 72.9140 General Partner unit equivalents for the years 2012 and 2014	-11,291,242	-11,291,242
Net asset value per unit	1,411.31
Balance ending at Dec. 31, 2013	30,103,205	29,728,513	374,692
Net income (loss)	4,426,754	4,378,575	48,179
Subscriptions of 1,179.5450, 7,217.7550 and 2,757.6500 Redeemable Units for the years 2012, 2013 and 2014	3,736,764	3,736,764
Redemptions of 8,631.6848, 8,050.3990, 5,976.8650 Redeemable Units for the years 2012, 2013 and 2014 and 72.0000, 72.9140 General Partner unit equivalents for the years 2012 and 2014	-8,024,295	-7,924,302	-99,993
Net asset value per unit	1,676.61
Balance ending at Dec. 31, 2014	$30,242,428	$29,919,550	$322,878

Statements_of_Changes_in_Partn1

Statements of Changes in Partners' Capital (Parenthetical)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Limited Partners [Member]
Subscriptions - Redeemable, Units	2,757.65	7,217.76	1,179.55
Redemptions - Partners' Capital Account, Units	5,976.86	8,050.40	8,631.68
General Partner [Member]
Redemptions - Partners' Capital Account, Units	72.914		72

Partnership_Organization

Partnership Organization	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Partnership Organization	1	Partnership 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 or indirectly, in the speculative trading of a diversified portfolio of commodity interests including futures, forward, option and swap contracts. The sectors traded include currencies, energy, grains, indices, U.S. and non-U.S. interest rates, livestock, metals and softs. The commodity interests that are traded by the Partnership through its investment in CMF Campbell Master Fund L.P. (the “Master”) are volatile and involve a high degree of market risk. The Partnership was authorized to sell an unlimited number of redeemable units of limited partnership interest (“Redeemable Units”) during its initial offering period. The Partnership privately and continuously offers Redeemable Units in the Partnership to qualified investors. There is no maximum number of units that may be sold by the Partnership.
	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 wholly owned by Morgan Stanley Smith Barney Holdings LLC (“MSSB Holdings”). MSSB Holdings is ultimately owned by Morgan Stanley. Morgan Stanley is a publicly held company whose shares are listed on the New York Stock Exchange. Morgan Stanley is engaged in various financial services and other businesses. Prior to June 28, 2013, Morgan Stanley indirectly owned a majority equity interest in MSSB Holdings and Citigroup Inc. indirectly owned a minority interest in MSSB Holdings. Prior to July 31, 2009, the date as of which MSSB Holdings became its owner, the General Partner was wholly owned by Citigroup Financial Products Inc., a wholly owned subsidiary of Citigroup Global Markets Holdings Inc. As of December 31, 2014, all trading decisions for the Partnership are made by the Advisor (defined below).
	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. The Partnership purchased 173,788.6446 units of the Master with cash equal to $172,205,653 and a contribution of open commodity futures and forward contracts with a fair value of $1,582,992. The Master permits accounts managed by Campbell & Company, Inc. (“Campbell” or the “Advisor”) using the Campbell Managed Futures Portfolio (formerly, Financial, Metal and Energy Large Portfolio), a proprietary, systematic trading program, to invest together in one trading vehicle. The General Partner is also the general partner of the Master. During the year ended December 31, 2014, the Master’s commodity broker was Morgan Stanley & Co. LLC (“MS&Co.”). During prior periods included in this report, Citigroup Global Markets Inc. (“CGM”) also served as a commodity broker. Individual and pooled accounts currently managed by the Advisor, including the Partnership, are permitted to be limited partners of the Master. The General Partner and the Advisor believe that trading through this master/feeder structure promotes efficiency and economy in the trading process. Expenses to investors as a result of the investment in the Master are approximately the same and redemption rights are not affected.
	The financial statements of the Master, including the Condensed Schedules of Investments, are contained elsewhere in this report and should be read together with the Partnership’s financial statements.
	As of December 31, 2014 and 2013, the Partnership owned approximately 100% of the Master. The Partnership intends to continue to invest substantially all of its assets in the Master. The performance of the Partnership is directly affected by the performance of the Master.
	The General Partner and each limited partner share in the profits and losses of the Partnership in proportion to the amount of Partnership interest owned by each, except that no limited partner shall be liable for obligations of the Partnership in excess of its initial capital contribution and profits, if any, net of distributions and losses, if any.
	The Partnership will be liquidated upon the first to occur of the following: December 31, 2017; the net asset value per Redeemable Unit 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”).

Accounting_Policies

Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Accounting Policies	2	Accounting Policies:
		a.	Use of Estimates.    The preparation of financial statements and accompanying notes in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires the General Partner to make estimates and assumptions that affect the reported amounts of assets and liabilities, income and expenses, and related disclosures of contingent assets and liabilities in the financial statements and accompanying notes. As a result, actual results could differ from these estimates.
		b.	Statement of Cash Flows.    The Partnership is not required to provide a Statement of Cash Flows.
		c.	Partnership’s Investments.    The Partnership values its investment in the Master at its net asset value per unit as calculated by the Master. The Master values its investments as described in Note 2, “Accounting Policies,” on the attached Master’s financial statements.
	Partnership’s Fair Value Measurements.    Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date under current market conditions. The fair value hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to fair values derived from unobservable inputs (Level 3). The level in the fair value hierarchy within which the fair value measurement in its entirety falls shall be determined based on the lowest level input that is significant to the fair value measurement in its entirety.
	GAAP also requires the use of judgment in determining if a formerly active market has become inactive and in determining fair values when the market has become inactive. The General Partner has concluded that based on available information in the marketplace, there has not been a significant decrease in the volume and level of activity in the Partnership’s Level 2 assets and liabilities.
	The Partnership will separately present purchases, sales, issuances, and settlements in its reconciliation of Level 3 fair value measurements (i.e., to present such items on a gross basis rather than on a net basis), and makes disclosures regarding the level of disaggregation and the inputs and valuation techniques used to measure fair value for measurements that fall within either Level 2 or Level 3 of the fair value hierarchy as required under GAAP.
	The Partnership values its investment in the Master where there are no other rights or obligations inherent within the ownership interest held by the Partnership based on the end of the day net asset value of the Master (Level 2). The value of the Partnership’s investment in the Master reflects its proportional interest in the Master. As of and for the years ended December 31, 2014 and 2013, the Partnership did not hold any derivative instruments that were based on unadjusted quoted prices in active markets for identical assets and liabilities (Level 1) or priced at fair value using unobservable inputs through the application of the General Partner’s assumptions and internal valuation pricing models (Level 3). During the years ended December 31, 2014 and 2013, there were no transfers of assets or liabilities between Level 1 and Level 2.
			December 31,		Quoted Prices in		Significant Other		Significant
			2014		Active Markets For		Observable Inputs		Unobservable
					Identical		(Level 2)		Inputs (Level 3)
					Assets and Liabilities
					(Level 1)
	Assets
	Investment in Master		$	30,700,788	$	—	$	30,700,788	$	—
	Net fair value		$	30,700,788	$	—	$	30,700,788	$	—
			December 31,		Quoted Prices in		Significant Other		Significant
			2013		Active Markets For		Observable Inputs		Unobservable
					Identical		(Level 2)		Inputs (Level 3)
					Assets and Liabilities
					(Level 1)
	Assets
	Investment in Master		$	30,747,092	$	—	$	30,747,092	$	—
	Net fair value		$	30,747,092	$	—	$	30,747,092	$	—
	Master’s Investments and Fair Value Measurements.    For disclosures regarding the Master’s investments and fair value measurements, see Note 2, “Accounting Policies,” on the attached Master’s financial statements.
		d.	Income Taxes.    Income taxes have not been provided as each partner is individually liable for the taxes, if any, on its share of the Partnership’s income and expenses.
	GAAP provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in the financial statements and requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Partnership’s financial statements to determine whether the tax positions are “more-likely-than-not” to be sustained by the applicable tax authority. Tax positions with respect to tax at the Partnership level not deemed to meet the “more-likely-than-not” threshold would be recorded as a tax benefit or expense in the current year. The General Partner concluded that no provision for income tax is required in the Partnership’s financial statements.
	The Partnership files U.S. federal and various state and local tax returns. No income tax returns are currently under examination. The 2011 through 2014 tax years remain subject to examination by U.S. federal and most state tax authorities. The General Partner does not believe that there are any uncertain tax positions that require recognition of a tax liability.
		e.	Investment Company Status.    Effective January 1, 2014, the Partnership adopted Accounting Standards Update (“ASU”) 2013-08 “Financial Services — Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements.” ASU 2013-08 changes the approach to the investment company assessment, requires non-controlling ownership interests in other investment companies to be measured at fair value, and requires additional disclosures about the investment company’s status as an investment company. ASU 2013-08 is effective for interim and annual reporting periods beginning after December 15, 2013. The adoption of this ASU did not have a material impact on the Partnership’s financial statements. Based on the General Partner’s assessment, the Partnership is deemed to be an investment company since inception.
		f.	Net Income (Loss) per unit.    Net income (loss) per unit is calculated in accordance with investment company guidance. See Note 6, “Financial Highlights.”
		g.	Subsequent Events.    The General Partner evaluates events that occur after the balance sheet date but before financial statements are issued. The General Partner has assessed the subsequent events through the date of issuance and determined that, no events have occurred that require adjustment of or disclosure in the financial statements.

Agreements

Agreements	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Agreements	3	Agreements:
		a.	Limited Partnership Agreement:
	The General Partner administers the business and affairs of the Partnership. Effective October 1, 2014, the Partnership will pay the General Partner a monthly administrative fee in return for its services to the Partnership equal to 1/12 of 1% (1% per year) of month-end Net Assets of the Partnership. Month-end Net Assets, for the purpose of calculating administrative fees, are Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s incentive fee accruals, the monthly management fee, the administrative fee and any redemptions or distributions as of the end of such month.
		b.	Management Agreements:
	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 Net Assets allocated to the Advisor as of the end of each month. Prior to June 1, 2014, the Partnership paid a monthly management fee equal to 1/6 of 1% (2% per year) of month-end Net Assets allocated to the Advisor. Month-end Net Assets, for the purpose of calculating management fees, are Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s incentive fee accrual, the monthly management fee, the administrative fee and any redemptions or distributions as of the end of such month. The Management Agreement may be terminated upon notice by either party.
	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, allocated pro rata from the Master, earned by the Advisor for the Partnership during each calendar quarter. 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 substantially all of the assets of the Partnership to the Master, the General Partner considers 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/Selling Agent Agreement:
	Prior to and during part of the third quarter of 2013, the Partnership was party to a Customer Agreement with CGM (the “CGM Customer Agreement”). During the third quarter of 2013, the Partnership entered into a Customer Agreement with MS&Co. (the “MS&Co. Customer Agreement”) and during the fourth quarter of 2013, the Partnership entered into a Selling Agent Agreement with Morgan Stanley Smith Barney LLC, doing business as Morgan Stanley Wealth Management (“Morgan Stanley Wealth Management”) (the “Selling Agreement”). The Partnership has terminated the CGM Customer Agreement.
	Under the CGM Customer Agreement, the Partnership paid CGM a monthly brokerage fee equal to 5.5% per year of month-end Net Assets in lieu of brokerage fees on a per trade basis. Month-end Net Assets, for the purpose of calculating brokerage fees, were Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s brokerage fees, incentive fee accrual, the monthly management fee and other expenses and any redemptions or distributions as of the end of such month. The Partnership paid exchange, service, clearing, user, give-up, floor brokerage and National Futures Association (“NFA”) fees (collectively the “CGM clearing fees”) through its investment in the Master. The CGM clearing fees were allocated to the Partnership based on its proportionate share of the Master. During the term of the CGM Customer Agreement, all of the Partnership’s assets that were not held in the Master’s accounts at CGM were deposited in the Partnership’s account at CGM. The Partnership’s cash was deposited by CGM in segregated bank accounts to the extent required by Commodity Futures Trading Commission regulations. CGM paid the Partnership interest on 80% of the average daily equity maintained in cash in the Partnership’s (or the Partnership’s allocable portion of the Master’s) brokerage account at a 30-day U.S. Treasury bill rate determined weekly by CGM based on the average non-competitive yield on 3-month U.S. Treasury bills maturing 30 days from the date on which such weekly rate is determined.
	Under the MS&Co. Customer Agreement and the 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, clearing, user, give-up, floor brokerage and NFA fees (collectively the “MS&Co. clearing fees” and together with the CGM clearing fees, the “clearing fees”) through its investment in the Master. Clearing fees will be paid for the life of the Partnership, although the rate at which such fees are paid may be changed. The MS&Co. clearing fees are allocated to the Partnership based on its proportionate share of the Master. All of the Partnership’s assets not held in the Master’s accounts at MS&Co. are deposited in the Partnership’s account at MS&Co. The Partnership’s cash is deposited by MS&Co. in segregated bank accounts to the extent required by Commodity Futures Trading Commission regulations. MS&Co. has agreed to pay the Partnership interest on 80% of the average daily equity maintained in cash in the Partnership’s (or the Partnership’s allocable portion of the Master’s) brokerage account at the rate equal to the monthly average of the 4-week U.S. Treasury bill discount rate. The MS&Co. Customer Agreement may generally be terminated upon notice by either party.
	Under the Selling Agreement with Morgan Stanley Wealth Management, the Partnership paid Morgan Stanley Wealth Management a monthly ongoing selling agent fee. Prior to April 1, 2014 the monthly ongoing selling agent fee was paid at a rate equal to 5.5% per year of month-end Net Assets. Effective April 1, 2014 the monthly ongoing selling agent fee was reduced to 3% per year of month-end Net Assets. Effective October 1, 2014, the monthly ongoing selling agent fee was reduced to 2% per year of month-end Net Assets. Morgan Stanley Wealth Management will pay a portion of its ongoing selling agent fees to properly registered or exempted financial advisors who have sold Redeemable Units. Month-end Net Assets, for the purpose of calculating ongoing selling agent fees are Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s ongoing selling agent fee, management fee, the incentive fee accrued, the administrative fee and other expenses and any redemptions or distributions as of the end of such month.
	Certain prior year amounts have been reclassified to conform to current year presentation. Amounts reported separately on the Statements of Income and Expenses as ongoing selling agent fees and clearing fees were previously presented as brokerage fees.

Trading_Activities

Trading Activities	12 Months Ended
	Dec. 31, 2014
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 invests substantially all of its assets through a “master/feeder” structure. The Partnership’s pro-rata share of the results of the Master’s trading activities are shown in the Statements of Income and Expenses.
	During the second quarter of 2013, the Master entered into a foreign exchange brokerage account agreement with MS&Co., and commenced foreign exchange trading on or about May 1, 2013.
	The MS&Co. Customer Agreement with the Partnership and the Master gives, and the CGM Customer Agreement with the Partnership and the Customer Agreement between CGM and the Master each gave, the Partnership and the Master, respectively, the legal right to net unrealized gains and losses on open futures and on open forward contracts. The Master nets, for financial reporting purposes, the unrealized gains and losses on open futures and on open forward contracts on the Statements of Financial Condition as the criteria under Accounting Standards Codification 210-20, “Balance Sheet,” have been met.
	Brokerage fees were calculated as a percentage of the Partnership’s adjusted net asset value on the last day of each month and were affected by trading performance, subscriptions and redemptions. Trading and transaction fees are based on the number of trades executed by the Advisor and the Partnership’s percent ownership of the Master.
	For disclosures regarding the Master’s trading activities, see Note 4, “Trading Activities”, on the attached Master’s financial statements.

Subscriptions_Distributions_an

Subscriptions, Distributions and Redemptions	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Subscriptions, Distributions and Redemptions	5	Subscriptions, Distributions and Redemptions:
	Subscriptions are accepted monthly from investors and they become limited partners on the first day of the month after their subscription is processed. Distributions of profits, if any, will be made at the sole discretion of the General Partner and at such times as the General Partner may decide. A limited partner may require the Partnership to redeem its Redeemable Units at their net asset value as of the last day of each month on three business days’ notice to the General Partner. There is no fee charged to limited partners in connection with redemptions.

Financial_Highlights

Financial Highlights	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Financial Highlights	6	Financial Highlights:
	Changes in the net asset value per unit for the years ended December 31, 2014, 2013 and 2012 were as follows:
			2014			2013			2012
	Net realized and unrealized gains (losses)*		$	308.61		$	140.24		$	17.71
	Interest income			0.19			0.4			0.66
	Expenses**			(43.50	)		(42.06	)		(35.68	)
	Increase (decrease) for the year			265.3			98.58			(17.31	)
	Net asset value per unit, beginning of year			1,411.31			1,312.73			1,330.04
	Net asset value per unit, end of year		$	1,676.61		$	1,411.31		$	1,312.73
	*	Includes ongoing selling agent fees and clearing fees allocated from the Master. Net realized and unrealized gains (losses) excluding ongoing selling agent fees and clearing fees for the years ended December 31, 2014, 2013 and 2012 were $363.01, $228.53 and $99.04, respectively.
	**	Excludes ongoing selling agent fees and clearing fees allocated from the Master. Total expenses including ongoing selling agent fees and clearing fees for the years ended December 31, 2014, 2013 and 2012 were $(97.90), $(130.35) and $(117.01), respectively.
			2014			2013			2012
	Ratios to Average Net Assets:
	Net investment income (loss)			(7.3	)%		(9.5	)%		(8.7	)%
	Incentive fees			—	%		—	%		—	%
	Net investment income (loss) before incentive fees***			(7.3	)%		(9.5	)%		(8.7	)%
	Operating expenses			7.3	%		9.5	%		8.8	%
	Incentive fees			—	%		—	%		—	%
	Total expenses and incentive fees			7.3	%		9.5	%		8.8	%
	Total return:
	Total return before incentive fees			18.8	%		7.5	%		(1.3	)%
	Incentive fees			—	%		—	%		—	%
	Total return after incentive fees			18.8	%		7.5	%		(1.3	)%
	***	Interest income less total expenses.
	The above ratios 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 net assets.

Financial_Instrument_Risks

Financial Instrument Risks	12 Months Ended
	Dec. 31, 2014
Investments, All Other Investments [Abstract]
Financial Instrument Risks	7	Financial Instrument Risks:
	In the normal course of business, the Partnership, through its investment in the Master, is party to financial instruments with off-balance-sheet risk, including derivative financial instruments and derivative commodity instruments. These financial instruments may include forwards, futures, options and swaps, whose values are based upon an underlying asset, index, or reference rate, and generally represent future commitments to exchange currencies or cash balances, or to purchase or sell other financial instruments at specific terms at specified future dates, or, in the case of derivative commodity instruments, to have a reasonable possibility to be settled in cash, through physical delivery or with another financial instrument. These instruments may be traded on an exchange, a swap execution facility or over-the-counter (“OTC”). Exchange-traded instruments include futures and certain standardized forward, option and swap contracts. Certain swap contracts may also be traded on a swap execution facility or OTC. OTC contracts are negotiated between contracting parties and also include certain forward and option contracts. Specific market movements of commodities or futures underlying an option cannot be accurately predicted. The purchaser of an option may lose the entire premium paid for the option. The writer or seller of an option has unlimited risk. Each of these instruments is subject to various risks similar to those related to the underlying financial instruments, including market and credit risk. In general, the risks associated with OTC contracts are greater than those associated with exchange-traded instruments because of the greater risk of default by the counterparty to an OTC contract. The General Partner estimates that at any given time approximately 0.0% to 52.6% of the Partnership’s/Master’s contracts are traded OTC.
	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.
	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. Market risk is directly impacted by the volatility and liquidity in the markets in which the related underlying assets are traded. The Partnership/Master is 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 Partnership’s/Master’s risk of loss in the event of a counterparty default is typically limited to the amounts recognized in the Statements of Financial Condition and is not represented by the contract or notional amounts of the instruments. The Partnership’s/Master’s risk of loss is reduced through the use of legally enforceable master netting agreements with counterparties that permit the Partnership/Master to offset unrealized gains and losses and other assets and liabilities with such counterparties upon the occurrence of certain events. The Partnership/Master had credit risk and concentration risk during the reporting period and prior periods, as MS&Co. and/or CGM or their affiliates were the counterparties or brokers with respect to the Partnership’s and the Master’s assets. Credit risk with respect to exchange-traded instruments is reduced to the extent that, through MS&Co. and/or CGM, the Partnership’s/Master’s counterparty is an exchange or clearing organization. The Partnership/Master continue to be subject to such risks with respect to MS&Co.
	The General Partner monitors and attempts to control 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 effective procedures for evaluating and limiting the credit and market risks to which the Partnership/Master may be subject. These monitoring systems generally allow the General Partner to statistically analyze actual trading results with risk-adjusted performance indicators and correlation statistics. In addition, online monitoring systems provide account analysis of futures, forward and option contracts by sector, margin requirements, gain and loss transactions and collateral positions.
	The majority of these instruments mature within one year of the inception date. However, due to the nature of the Partnership’s/Master’s business, these instruments may not be held to maturity.

Accounting_Policies_Policies

Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates.    The preparation of financial statements and accompanying notes in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires the General Partner to make estimates and assumptions that affect the reported amounts of assets and liabilities, income and expenses, and related disclosures of contingent assets and liabilities in the financial statements and accompanying notes. As a result, actual results could differ from these estimates.
Statement of Cash Flows	Statement of Cash Flows.    The Partnership is not required to provide a Statement of Cash Flows.
Partnership's Investments		Partnership’s Investments.    The Partnership values its investment in the Master at its net asset value per unit as calculated by the Master. The Master values its investments as described in Note 2, “Accounting Policies,” on the attached Master’s financial statements.
Partnership's Fair Value Measurements	Partnership’s Fair Value Measurements.    Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date under current market conditions. The fair value hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to fair values derived from unobservable inputs (Level 3). The level in the fair value hierarchy within which the fair value measurement in its entirety falls shall be determined based on the lowest level input that is significant to the fair value measurement in its entirety.
	GAAP also requires the use of judgment in determining if a formerly active market has become inactive and in determining fair values when the market has become inactive. The General Partner has concluded that based on available information in the marketplace, there has not been a significant decrease in the volume and level of activity in the Partnership’s Level 2 assets and liabilities.
	The Partnership will separately present purchases, sales, issuances, and settlements in its reconciliation of Level 3 fair value measurements (i.e., to present such items on a gross basis rather than on a net basis), and makes disclosures regarding the level of disaggregation and the inputs and valuation techniques used to measure fair value for measurements that fall within either Level 2 or Level 3 of the fair value hierarchy as required under GAAP.
	The Partnership values its investment in the Master where there are no other rights or obligations inherent within the ownership interest held by the Partnership based on the end of the day net asset value of the Master (Level 2). The value of the Partnership’s investment in the Master reflects its proportional interest in the Master. As of and for the years ended December 31, 2014 and 2013, the Partnership did not hold any derivative instruments that were based on unadjusted quoted prices in active markets for identical assets and liabilities (Level 1) or priced at fair value using unobservable inputs through the application of the General Partner’s assumptions and internal valuation pricing models (Level 3). During the years ended December 31, 2014 and 2013, there were no transfers of assets or liabilities between Level 1 and Level 2.
			December 31,		Quoted Prices in		Significant Other		Significant
			2014		Active Markets For		Observable Inputs		Unobservable
					Identical		(Level 2)		Inputs (Level 3)
					Assets and Liabilities
					(Level 1)
	Assets
	Investment in Master		$	30,700,788	$	—	$	30,700,788	$	—
	Net fair value		$	30,700,788	$	—	$	30,700,788	$	—
			December 31,		Quoted Prices in		Significant Other		Significant
			2013		Active Markets For		Observable Inputs		Unobservable
					Identical		(Level 2)		Inputs (Level 3)
					Assets and Liabilities
					(Level 1)
	Assets
	Investment in Master		$	30,747,092	$	—	$	30,747,092	$	—
	Net fair value		$	30,747,092	$	—	$	30,747,092	$	—
	Master’s Investments and Fair Value Measurements.    For disclosures regarding the Master’s investments and fair value measurements, see Note 2, “Accounting Policies,” on the attached Master’s financial statements.
Income Taxes		Income Taxes.    Income taxes have not been provided as each partner is individually liable for the taxes, if any, on its share of the Partnership’s income and expenses.
	GAAP provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in the financial statements and requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Partnership’s financial statements to determine whether the tax positions are “more-likely-than-not” to be sustained by the applicable tax authority. Tax positions with respect to tax at the Partnership level not deemed to meet the “more-likely-than-not” threshold would be recorded as a tax benefit or expense in the current year. The General Partner concluded that no provision for income tax is required in the Partnership’s financial statements.
	The Partnership files U.S. federal and various state and local tax returns. No income tax returns are currently under examination. The 2011 through 2014 tax years remain subject to examination by U.S. federal and most state tax authorities. The General Partner does not believe that there are any uncertain tax positions that require recognition of a tax liability.
Investment Company Status		Investment Company Status.    Effective January 1, 2014, the Partnership adopted Accounting Standards Update (“ASU”) 2013-08 “Financial Services — Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements.” ASU 2013-08 changes the approach to the investment company assessment, requires non-controlling ownership interests in other investment companies to be measured at fair value, and requires additional disclosures about the investment company’s status as an investment company. ASU 2013-08 is effective for interim and annual reporting periods beginning after December 15, 2013. The adoption of this ASU did not have a material impact on the Partnership’s financial statements. Based on the General Partner’s assessment, the Partnership is deemed to be an investment company since inception.
Net Income (Loss) per unit		Net Income (Loss) per unit.    Net income (loss) per unit is calculated in accordance with investment company guidance. See Note 6, “Financial Highlights.”
Subsequent Events	Subsequent Events.    The General Partner evaluates events that occur after the balance sheet date but before financial statements are issued. The General Partner has assessed the subsequent events through the date of issuance and determined that, no events have occurred that require adjustment of or disclosure in the financial statements.

Accounting_Policies_Tables

Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Value of Partnership's Investments in Master	During the years ended December 31, 2014 and 2013, there were no transfers of assets or liabilities between Level 1 and Level 2.
		December 31,		Quoted Prices in		Significant Other		Significant
		2014		Active Markets For		Observable Inputs		Unobservable
				Identical		(Level 2)		Inputs (Level 3)
				Assets and Liabilities
				(Level 1)
	Assets
	Investment in Master	$	30,700,788	$	—	$	30,700,788	$	—
	Net fair value	$	30,700,788	$	—	$	30,700,788	$	—
		December 31,		Quoted Prices in		Significant Other		Significant
		2013		Active Markets For		Observable Inputs		Unobservable
				Identical		(Level 2)		Inputs (Level 3)
				Assets and Liabilities
				(Level 1)
	Assets
	Investment in Master	$	30,747,092	$	—	$	30,747,092	$	—
	Net fair value	$	30,747,092	$	—	$	30,747,092	$	—

Financial_Highlights_Tables

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Changes in Net Asset Value Per Unit	Changes in the net asset value per unit for the years ended December 31, 2014, 2013 and 2012 were as follows:
			2014			2013			2012
	Net realized and unrealized gains (losses)*		$	308.61		$	140.24		$	17.71
	Interest income			0.19			0.4			0.66
	Expenses**			(43.50	)		(42.06	)		(35.68	)
	Increase (decrease) for the year			265.3			98.58			(17.31	)
	Net asset value per unit, beginning of year			1,411.31			1,312.73			1,330.04
	Net asset value per unit, end of year		$	1,676.61		$	1,411.31		$	1,312.73
	*	Includes ongoing selling agent fees and clearing fees allocated from the Master. Net realized and unrealized gains (losses) excluding ongoing selling agent fees and clearing fees for the years ended December 31, 2014, 2013 and 2012 were $363.01, $228.53 and $99.04, respectively.
	**	Excludes ongoing selling agent fees and clearing fees allocated from the Master. Total expenses including ongoing selling agent fees and clearing fees for the years ended December 31, 2014, 2013 and 2012 were $(97.90), $(130.35) and $(117.01), respectively.
			2014			2013			2012
	Ratios to Average Net Assets:
	Net investment income (loss)			(7.3	)%		(9.5	)%		(8.7	)%
	Incentive fees			—	%		—	%		—	%
	Net investment income (loss) before incentive fees***			(7.3	)%		(9.5	)%		(8.7	)%
	Operating expenses			7.3	%		9.5	%		8.8	%
	Incentive fees			—	%		—	%		—	%
	Total expenses and incentive fees			7.3	%		9.5	%		8.8	%
	Total return:
	Total return before incentive fees			18.8	%		7.5	%		(1.3	)%
	Incentive fees			—	%		—	%		—	%
	Total return after incentive fees			18.8	%		7.5	%		(1.3	)%
	***	Interest income less total expenses.

Partnership_Organization_Addit

Partnership Organization - Additional Information (Detail) (USD $)	12 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2005
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Percentage of Partnership owned	100.00%	100.00%
CMF Campbell Master Fund L.P. [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Units of Partnership purchased			173,788.64
Cash equal, Partnership purchased			$172,205,653
Fair value, Partnership purchased			$1,582,992
Minimum [Member]
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Net asset value per unit liquidation circumstance	400
Partnership liquidation date circumstance	31-Dec-17

Accounting_Policies_Additional

Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Transfers of assets or liabilities between Level 1 and Level 2	$0	$0
Provision for income tax	$0

Accounting_Policies_Value_of_P

Accounting Policies - Value of Partnership's Investment in Master (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Investment in Master	$30,700,788	$30,747,092
Net fair value	30,700,788	30,747,092
Significant Other Observable Inputs (Level 2) [Member]
Derivative [Line Items]
Investment in Master	30,700,788	30,747,092
Net fair value	$30,700,788	$30,747,092

Agreements_Additional_Informat

Agreements - Additional Information (Detail)	3 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended
	Dec. 31, 2014	31-May-14	Dec. 31, 2014	Dec. 31, 2014	Mar. 31, 2014	Sep. 30, 2014
Investment [Line Items]
Percentage of monthly administrative fee	0.08%
Percentage of administrative fee	1.00%
Percentage of monthly management fee		0.17%	0.13%
Percentage of management fee		2.00%	1.50%
Incentive fee, percent				20.00%
Percentage of brokerage fee				5.50%
Percentage of allocable shares				80.00%
Treasury bills maturity period				30 days
MS&Co. [Member]
Investment [Line Items]
Percentage of allocable shares				80.00%
Morgan Stanley Wealth Management [Member]
Investment [Line Items]
Ongoing selling agent fee	2.00%				5.50%	3.00%

Subscriptions_Distributions_an1

Subscriptions, Distributions and Redemptions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Statement of Partners' Capital [Abstract]
Fee charged to limited partners	$0

Financial_Highlights_Changes_i

Financial Highlights - Changes in Net Asset Value Per Unit (Detail) (Limited Partners [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes in the net asset value per unit:
Expenses	-43.5	-42.06	-35.68
Increase (decrease) for the year	265.3	98.58	-17.31
Net asset value per unit, beginning of year	1,411.31	1,312.73	1,330.04
Net asset value per unit, end of year	1,676.61	1,411.31	1,312.73
Ratios to Average Net Assets:
Net investment income (loss)	-7.30%	-9.50%	-8.70%
Incentive fees	0.00%	0.00%	0.00%
Net investment income (loss) before incentive fees	-7.30%	-9.50%	-8.70%
Operating expenses	7.30%	9.50%	8.80%
Incentive fees	0.00%	0.00%	0.00%
Total expenses and incentive fees	7.30%	9.50%	8.80%
Total return:
Total return before incentive fees	18.80%	7.50%	-1.30%
Incentive fees	0.00%	0.00%	0.00%
Total return after incentive fees	18.80%	7.50%	-1.30%
CMF Campbell Master Fund L.P. [Member]
Changes in the net asset value per unit:
Net realized and unrealized gains (losses)	308.61	140.24	17.71
Interest income	0.19	0.4	0.66

Financial_Highlights_Changes_i1

Financial Highlights - Changes in Net Asset Value Per Unit (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transactions [Abstract]
Net realized and unrealized gains (losses) excluding ongoing selling agent fees and clearing fees	363.01	228.53	99.04
Total expenses including ongoing selling agent fees and clearing fees	-97.9	-130.35	-117.01

Financial_Instrument_Risks_Add

Financial Instrument Risks - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Investments, All Other Investments [Abstract]
Percentage of partnership master contract traded minimum	0.00%
Percentage of partnership master contract traded maximum	52.60%
Financial instruments maturity period	1 year