2.2.0.25truefalse010005 - Document - PREMIUM SHARES {Unlabeled}falsefalsetrue1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : DDDD Member {dei_LegalEntityAxis} : S000003014 Member 3/30/2011 - 3/30/2011 c_S000003014_DDDDhttp://www.sec.gov/CIK0000926898duration2011-03-30T00:00:002011-03-30T00:00:00falsefalsemilestone_DDDDMemberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_DDDDMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsemilestone_S000003014Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMember1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://milestone/role/dddd1falsefalsefalse00Treasury Obligations Portfolio - Premium Shares | Milestone Treasury Obligations PortfolioTreasury Obligations Portfolio - Premium Shares | Milestone Treasury Obligations Portfoliofalsefalsefalsefalsefalse1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : DDDD Member {dei_LegalEntityAxis} : S000003014 Member 3/30/2011 - 3/30/2011 c_S000003014_DDDDhttp://www.sec.gov/CIK0000926898duration2011-03-30T00:00:002011-03-30T00:00:00falsefalsemilestone_DDDDMemberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_DDDDMemberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsemilestone_S000003014Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse3false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"><b> INVESTMENT OBJECTIVE </b></p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse4false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">The Treasury Obligations Portfolio is a money market fund that seeks to provide its shareholders with the maximum current income that is consistent with the preservation of capital and the maintenance of liquidity.</p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalse5false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"><b> FEES AND EXPENSES OF THE PORTFOLIO </b></p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalse6false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> This table describes the fees and expenses you may pay if you buy and hold Premium Shares of the Portfolio. </p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalse7false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees</b> (fees paid directly from your investment):</p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalse8false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~http://milestone/role/ShareholderFeesDataDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>falsefalse<div style="display:none">~http://milestone/role/ShareholderFeesDataDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>falsehttp://milestone/role/ShareholderFeesDataDDDDfalsefalse020015 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalsePremium Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_C000008273Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseTreasury Obligations Portfolio - Premium Sharesdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_DDDDMemberdei_DocumentInformationDocumentAxisexplicitMemberPremium SharesTreasury Obligations Portfolio - Premium SharesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0000.000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0000.000falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member4false0rr_MaximumDeferredSalesChargeOverOtherrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0000.000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_MaximumDeferredSalesChargeOverOthertruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.0000.000falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member5false0rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOtherrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.000.00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Sales Charge (Load) Imposed on Reinvested Dividends[and other Distributions] (as a percentage of ____)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 3 -Subsection table falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOthertruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.000.00falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member6false0rr_RedemptionFeeOverRedemptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.000.00falsefalsefalsetruefalseOtherrr:NonPositivePure4Typepure"Redemption Fee" (as a percentage of amount redeemed, if applicable) If the Fund is an Exchange-Traded Fund and issues or redeems shares in creation units of not less than 25,000 shares each, exclude any fees charged for the purchase and redemption of the Fund's creation units. "Redemption Fee" includes a fee charged for any redemption of the Fund's shares, but does not include a deferred sales charge (load) imposed upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph b -Subsection instructions falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_RedemptionFeeOverRedemptiontruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.000.00falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member7false0rr_ExchangeFeeOverRedemptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.000.00falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureExchange Fee includes the maximum fee charged for any exchange or transfer of interest from the Fund to another fund. The Fund may include in a footnote to the table, if applicable, a tabular presentation of the range of exchange fees or a narrative explanation of the fees.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph c -Subsection instructions falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_ExchangeFeeOverRedemptiontruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.000.00falsefalsefalsetruefalseOthernanafalsefalse15Shareholder Fees Milestone Treasury Obligations PortfolioUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*RowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014MemberfalsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalse9false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> <b> Annual Portfolio Operating Expenses</b> (expenses that you can pay each year as a percentage of the value of your investment): </p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalse10false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://milestone/role/OperatingExpensesDataDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>falsefalse<div style="display:none">~ http://milestone/role/OperatingExpensesDataDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>falsehttp://milestone/role/OperatingExpensesDataDDDDfalsefalse020027 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalsePremium Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_C000008273Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseTreasury Obligations Portfolio - Premium Sharesdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_DDDDMemberdei_DocumentInformationDocumentAxisexplicitMemberPremium SharesTreasury Obligations Portfolio - Premium SharesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00100.0010falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00100.0010falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member5false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00300.0030[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions truefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.00300.0030falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member6false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00650.0065falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions truefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00650.0065falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member7false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014Member8false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00650.0065falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table truefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations Portfolio0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00650.0065falsefalsefalsetruefalseOthernanafalsefalse1<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">Includes 0.25% shareholder service fee</p>16Annual Fund Operating Expenses Milestone Treasury Obligations PortfolioUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columnrr_ProspectusShareClassAxisAxis*Columndei_DocumentInformationDocumentAxisAxis*ColumnunitUnit*RowprimaryElement*Rowdei_LegalEntityAxisAxismilestone_S000003014MemberfalsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalse11false0rr_ExpenseFootnotesTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">Milestone Capital Management LLC (the "Adviser") has agreed to limit the total operating expenses of the Premium Shares to 0.65% until April 1, 2012 by waiving fees and/or reimbursing expenses. The agreement cannot be modified to increase or eliminate the limit during this period and will continue from year to year unless modified or terminated by the Adviser with the approval of the Board of Trustees of The Milestone Funds (the "Trust").</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringShareholder Fees.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subsection instructions falsefalse12false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"><b> Example </b></p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse13false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> This example is to help you compare the cost of investing in Premium Shares of the Portfolio with the cost of investing in other mutual funds.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> The Example assumes that: </p> <ul> <li><font size="2">you invest $10,000 in the Portfolio for the time periods indicated and that you redeem all of your shares at the end of those periods;</font></li> <li><font size="2">your investment has a 5% return each year; and</font></li> <li><font size="2">the Portfolio's operating expenses remain the same.&nbsp;</font></li> </ul> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalse14false0rr_ExpenseExampleByYearCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">Although your actual costs may be higher or lower, under these assumptions, your costs would be:</p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse15false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://milestone/role/ExpenseExampleDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>falsefalse<div style="display:none">~ http://milestone/role/ExpenseExampleDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>truehttp://milestone/role/ExpenseExampleDDDDfalsefalse020036 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue6666[1]falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$2falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue208208[1]falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue362362[1]falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$4falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue810810[1]falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalsePremium Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_C000008273Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseTreasury Obligations Portfolio - Premium Sharesdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_DDDDMemberdei_DocumentInformationDocumentAxisexplicitMemberPremium SharesTreasury Obligations Portfolio - Premium SharesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truefalsetrue6666falsefalsefalsetruefalse2truefalsetrue208208falsefalsefalsetruefalse3truefalsetrue362362falsefalsefalsetruefalse4truefalsetrue810810falsefalsefalsetruefalseOthernanafalsefalse1<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> This example is based on the fees listed in the table and assumes the reinvestment of dividends. Your costs of investing in the Portfolio for one year reflect the amount you would pay after the Adviser reimburses the Portfolio for some or all of the Portfolio's total expenses. Your costs of investing in the Portfolio for three, five and ten years reflect the amount you would pay if the Adviser did not reimburse the Portfolio for some or all of the Portfolio's total expenses. </p>41Expense Example Milestone Treasury Obligations Portfolio (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse16false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"><b> PRINCIPAL INVESTMENT STRATEGIES </b></p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse17false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">As a fundamental policy, which cannot be changed without shareholder approval, the Portfolio invests <b>only</b> in: </p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<i>U.S. Treasury obligations </i>maturing in 397 days or less.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<i> Repurchase agreements</i> fully collateralized by U.S. Treasury obligations.</p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> The Portfolio may invest in U.S. Treasury obligations or repurchase agreements without limit. Although the Portfolio intends to be fully invested in these instruments, it may hold a <i>de minimis</i> amount of cash for a short period prior to investment or payment of the proceeds of redemption. </p> <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> The Portfolio will maintain an average maturity computed on a dollar-weighted basis of 60 days or less and a dollar-weighted average life of 120 days or less.</p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalse18false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"><b> PRINCIPAL RISKS </b></p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalse19false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">Although the Portfolio invests in short-term Treasury obligations, an investment in the Portfolio is subject to risk even if all securities in the Portfolio are paid in full at maturity. All money market instruments, including U.S. Treasury obligations, can change in value in response to changes in interest rates, and a major change in rates could cause the share price to change. While U.S. Treasury obligations are backed by the full faith and credit of the U.S. government, an investment in the Portfolio is neither insured nor guaranteed by the Federal Deposit Insurance Corporation, U.S. government or any other government agency. Thus, while the Portfolio seeks to maintain a stable net asset value of $1.00 per share, there is no assurance that it will do so. It is possible to lose money by investing in the Portfolio. </p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalse20false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"><b> PERFORMANCE INFORMATION </b></p> falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse21false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 <p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;"> The following chart demonstrates the risks of investing in the Portfolio by showing changes in the performance of the Portfolio's Premium Shares from year to year. Past performance is not an indication of future performance. </p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalse22false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://milestone/role/BarChartDataDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>falsefalseBarChart8.jpg<div style="display:none">~ http://milestone/role/BarChartDataDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>truehttp://milestone/role/BarChartDataDDDDfalsefalse020055 - Schedule - Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member3false0rr_AnnualReturn2001rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03450.0345falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$2falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member4false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.01220.0122falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00580.0058falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$4falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00780.0078falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$5falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.02570.0257falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$6falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04420.0442falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$7falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04410.0441falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$8falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.01260.0126falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$9falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member11false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00010.0001falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$10falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00010.0001falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalsePremium Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_C000008273Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseTreasury Obligations Portfolio - Premium Sharesdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_DDDDMemberdei_DocumentInformationDocumentAxisexplicitMemberPremium SharesTreasury Obligations Portfolio - Premium SharesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03450.0345falsefalsefalsetruefalse2truetruefalse0.01220.0122falsefalsefalsetruefalse3truetruefalse0.00580.0058falsefalsefalsetruefalse4truetruefalse0.00780.0078falsefalsefalsetruefalse5truetruefalse0.02570.0257falsefalsefalsetruefalse6truetruefalse0.04420.0442falsefalsefalsetruefalse7truetruefalse0.04410.0441falsefalsefalsetruefalse8truetruefalse0.01260.0126falsefalsefalsetruefalse9truetruefalse0.00010.0001falsefalsefalsetruefalse10truetruefalse0.00010.0001falsefalsefalsetruefalseOthernanafalsefalse101Annual Total Returns Milestone Treasury Obligations PortfolioUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalse23false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">&nbsp;</p> <pre> Best Quarter: March 31, 2001 1.26% Worst Quarter: March 31, 2010 0.00%* ________ * Less than 0.005% </pre> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse24false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://milestone/role/PerformanceTableDataDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>falsefalse<div style="display:none">~ http://milestone/role/PerformanceTableDataDDDD column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact milestone_S000003014Member ~</div>truehttp://milestone/role/PerformanceTableDataDDDDfalsefalse020065 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member3false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$2falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member4false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02000.0200falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$3falseColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014Member5false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01850.0185falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsefalsefalseMilestone Treasury Obligations Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_S000003014Memberdei_LegalEntityAxisexplicitMemberMilestone Treasury Obligations PortfoliofalseUSDfalsefalse$1falseRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*duration2011-03-30T00:00:002011-03-30T00:00:00falsefalsePremium Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_C000008273Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseTreasury Obligations Portfolio - Premium Sharesdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldimilestone_DDDDMemberdei_DocumentInformationDocumentAxisexplicitMemberPremium SharesTreasury Obligations Portfolio - Premium SharesUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00010.0001falsefalsefalsetruefalse2truetruetrue0.02000.0200falsefalsefalsetruefalse3truetruetrue0.01850.0185falsefalsefalsetruefalseOthernanafalsefalse31Average Annual Total Returns Milestone Treasury Obligations PortfolioUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*Columndei_LegalEntityAxisAxismilestone_S000003014MemberRowperiodPeriod*Rowrr_ProspectusShareClassAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalse25false0rr_PerformanceTableClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font-size:12;padding-top:2;padding-bottom:0;padding-left:0;">The Premium Shares' seven-day current yield on 12/31/10 was 0.01%. For the Premium Shares' current yield, please call us at <b>800-941-MILE (6453).</b></p> falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also shouldshow the returns of an appropriate broadbased securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b falsefalse124PREMIUM SHARES (Treasury Obligations Portfolio - Premium Shares, Milestone Treasury Obligations Portfolio)UnKnownUnKnownUnKnownUnKnownfalsetrue