v3.8.0.1

Basis of Presentation and Summary of Significant Accounting Policies - Statements of Income and Expenses and Changes in Partners' Capital (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Expenses:
Professional fees	$ 51,457	$ 50,896
Total expenses	467,867	596,813
Net investment income	(339,356)	(527,844)
Net gains (losses) on trading of commodity interests:
Net realized gains (losses) on closed contracts	560,521	(369,886)
Net change in unrealized gains (losses) on open contracts	(35,761)	(426,760)
Total trading results	524,760	(796,646)
Net income (loss)	185,404	(1,324,490)
Partners' Capital, beginning of period	29,197,758	48,380,238
Partners' Capital, end of period	28,386,460	41,905,103
CMF Willowbridge Master Fund L.P. [Member]
Investment Income:
Interest income	877,206	462,598
Expenses:
Clearing fees	726,846	248,489
Professional fees	18,445	17,197
Total expenses	745,291	265,686
Net investment income	131,915	196,912
Net gains (losses) on trading of commodity interests:
Net realized gains (losses) on closed contracts	6,193,068	(3,141,113)
Net change in unrealized gains (losses) on open contracts	(203,651)	(3,496,800)
Total trading results	5,989,417	(6,637,913)
Net income (loss)	6,121,332	(6,441,001)
Subscriptions - Limited Partners	726,928	8,251,061
Redemptions - Limited Partners	(75,407,939)	(18,600,508)
Distribution of interest income to feeder funds	(738,731)	(351,215)
Net increase (decrease) in Partners' Capital	(69,298,410)	(17,141,663)
Partners' Capital, beginning of period	297,004,901	391,498,613
Partners' Capital, end of period	$ 227,706,491	$ 374,356,950
Net asset value per Redeemable Unit (81,719.0211 and 128,497.5657 Redeemable Units outstanding at March 31, 2018 and 2017, respectively)	$ 2,786.46	$ 2,913.34	$ 2,742.16
Net income (loss) per Redeemable Unit	$ 52.40	$ (50.04)
Weighted average Redeemable Units outstanding	91,241.1570	130,160.4541

The amount of expense in the period for clearance fees.

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Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

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The total amount of distributions to limited partners.

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Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The amount of net income or loss for the period per each limited partnership and general partnership unit in instances when basic and diluted earnings per unit are the same amount and aggregated on the face of the financial statements. Basic earnings per unit is the amount of net income or loss for the period per unit outstanding during the reporting period. Diluted earnings per unit includes the amount of net income or loss for the period available to each limited and general partnership unit outstanding during the reporting period and to each unit that would have been outstanding assuming the issuance of units for all dilutive potential units outstanding during the reporting period.

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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The amount of ownership interest of different classes of partners in limited partnership.

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Changes in the ownership interest during the period of each class of partners. Partners include general, limited and preferred partners.

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Monetary value of the issuance of new units of limited partnership interest in a private placement.

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Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners.

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Amount of realized and unrealized gain (loss) resulting from the difference between acquisition price and selling price or fair value of trading assets and trading liabilities, and from the firm's direct investment activity, conducted separately from customer trading activities, including, but not limited to, investments in private equity, alternative investment products, real estate, and exchanges and memberships.

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A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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The average number of limited partnership and general partnership units issued and outstanding that are used in calculating basic and diluted earnings per limited partnership and general partnership unit.

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Ceres Tactical Macro L.P. 10-Q