2.4.0.84050 - Disclosure - General Partner and Related Party Transactions (Details)truefalsefalse1false USDfalsefalse$D2013Q2http://www.sec.gov/CIK0000845698duration2013-04-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$D2012Q2http://www.sec.gov/CIK0000845698duration2012-04-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$D2013Q2YTDhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$D2012Q2YTDhttp://www.sec.gov/CIK0000845698duration2012-01-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_RelatedPartyTransactionLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0General Partner and Related Party Transactions2false 4gpff_FeesToGeneralPartnergpff_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse82678268267826USD$falsetruefalse2truefalsefalse1082895510828955USD$falsetruefalse3truefalsefalse1720074517200745USD$falsetruefalse4truefalsefalse2217239622172396USD$falsetruefalsexbrli:monetaryItemTypemonetaryExpenses charged against the earnings during the period that are related to the general partner fee, selling agent compensation and consulting fees to the trading advisors etc.No definition available.false2Brokerage commission3false 4gpff_OrganizationalAndOfferingCostsgpff_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse426157426157USD$falsefalsefalse2truefalsefalse549186549186USD$falsefalsefalse3truefalsefalse884713884713USD$falsefalsefalse4truefalsefalse11210291121029USD$falsefalsefalsexbrli:monetaryItemTypemonetaryExpenses recognized in the period that are related to organization and offering costs incurred in connection with the organization and the ongoing public offering of partnership interests.No definition available.false2Organizational and offering costs4false 4gpff_PercentageOfAverageMonthEndNetAssetsAsBasisForDeterminingOperatingExpenseReimbursementsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse0.00250.0025falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureRepresents the percentage of partnership's average month-end net assets during the year considered as a basis for determining operating expense reimbursements.No definition available.false0Percentage of average month-end net assets as basis for determining operating expense reimbursements5false 4us-gaap_OtherExpensesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse367811367811USD$falsefalsefalse2truefalsefalse475262475262USD$falsefalsefalse3truefalsefalse764128764128USD$falsefalsefalse4truefalsefalse970354970354USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents a sum total of expenses not separately reflected on the income statement for the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4,6) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 false2Operating expenses6false 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4gpff_MinimumOwnershipPercentageOfTotalCapitalContributionsOfAllPartnersToPartnershipOptionOnegpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse0.010.01falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureRepresents the minimum ownership of units in the partnership as a percentage of all capital contributions of all partners to the partnership.No definition available.false0Minimum ownership of units as a percentage of all capital contributions of all Partners to the Partnership, option one9false 4gpff_MinimumOwnershipAmountOptionTwogpff_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2500025000USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the value of minimum ownership of units required in the partnership.No definition available.false2Value of minimum ownership of units, option two10false 4gpff_MinimumNetWorthPercentageOfTotalCapitalContributionsOfAllPartnersAndRelatedLimitedPartnershipsOptionOnegpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse0.050.05falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureRepresents the percentage of the total capital contributions of all partners and all limited partnerships to which it is a general partner (including the Partnership), on the basis of which minimum net worth is to be determined.No definition available.false0Percentage of total capital contributions of all partners and all related limited partnerships used in computation of minimum net worth, option one11false 4gpff_MinimumNetWorthPercentageOfUnitsBeingOfferedForSaleInPartnershipOptionOnegpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse0.050.05falsefalsefalse4falsefalsefalse00falsefalsefalsenum:percentItemTypepureRepresents the percentage of the units being offered for sale in the partnership, which is used to maintain the minimum net worth.No definition available.false0Percentage of Units being offered for sale in the Partnership used in computation of minimum net worth, option one12false 4gpff_AmountOfMinimumNetWorthOptionTwogpff_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse5000050000USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the minimum amount of net worth that is to be maintained during such time as the units are registered for sale to 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