2.4.0.84060 - Disclosure - Subscriptions, Redemptions and Allocation of Net Income or Loss (Details)truefalsefalse1false falsefalseD2013Q2YTD_LimitedPartnerMember_CapitalUnitClassAMemberhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00DayStandardhttp://www.xbrl.org/2009/utrDutr01false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse1false truefalseD2013Q2YTD_LimitedPartnerMember_CapitalUnitClassAMemberhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseClass A Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CapitalUnitClassAMemberus-gaap_StatementClassOfStockAxisexplicitMemberfalsefalseLimited Partnersus-gaap_PartnerTypeOfPartnersCapitalAccountAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LimitedPartnerMemberus-gaap_PartnerTypeOfPartnersCapitalAccountAxisexplicitMemberDayStandardhttp://www.xbrl.org/2009/utrDutr0nanafalse0Class A Units2true 3gpff_PartnersCapitalRedemptionLineItemsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Redemptions3false 4gpff_PriorWrittenNoticePeriodByLimitedPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1010falsefalsefalsexbrli:integerItemTypeintegerRepresents the Limited Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by Limited Partner for redemption of Limited Partner units4false 4gpff_PriorWrittenNoticePeriodByGeneralPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1515falsefalsefalsexbrli:integerItemTypeintegerRepresents the General Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by General Partner for redemption of Limited Partner units5false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2false truefalseD2013Q2YTD_LimitedPartnerMember_CapitalUnitClassBMemberhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseClass B Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CapitalUnitClassBMemberus-gaap_StatementClassOfStockAxisexplicitMemberfalsefalseLimited Partnersus-gaap_PartnerTypeOfPartnersCapitalAccountAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LimitedPartnerMemberus-gaap_PartnerTypeOfPartnersCapitalAccountAxisexplicitMemberDayStandardhttp://www.xbrl.org/2009/utrDutr0nanafalse0Class B Units6true 3gpff_PartnersCapitalRedemptionLineItemsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Redemptions7false 4gpff_PriorWrittenNoticePeriodByLimitedPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1010falsefalsefalsexbrli:integerItemTypeintegerRepresents the Limited Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by Limited Partner for redemption of Limited Partner units8false 4gpff_PriorWrittenNoticePeriodByGeneralPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1515falsefalsefalsexbrli:integerItemTypeintegerRepresents the General Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by General Partner for redemption of Limited Partner units9false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse3false USDtruefalse$D2013Q2YTD_LimitedPartnerMember_LegacyOneClassMemberhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseLegacy 1 Class Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldigpff_LegacyOneClassMemberus-gaap_StatementClassOfStockAxisexplicitMemberfalsefalseLimited Partnersus-gaap_PartnerTypeOfPartnersCapitalAccountAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LimitedPartnerMemberus-gaap_PartnerTypeOfPartnersCapitalAccountAxisexplicitMemberDayStandardhttp://www.xbrl.org/2009/utrDutr0MonthStandardhttp://www.xbrl.org/2009/utrMutr0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Legacy 1 Class Units10true 3gpff_PartnersCapitalRedemptionLineItemsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Redemptions11false 4gpff_PriorWrittenNoticePeriodByLimitedPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1010falsefalsefalsexbrli:integerItemTypeintegerRepresents the Limited Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by Limited Partner for redemption of Limited Partner units12false 4gpff_PriorWrittenNoticePeriodByGeneralPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1515falsefalsefalsexbrli:integerItemTypeintegerRepresents the General Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by General Partner for redemption of Limited Partner units13false 4gpff_RedemptionFeesApplicableForStockholdersWhoRedeemUnitsOnOrAfterOneYearAnniversaryOfSubscriptionsgpff_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions.No definition available.false2Redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions14false 4gpff_LockInPeriodForRedemptionOfUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse33falsefalsefalsexbrli:integerItemTypeintegerRepresents the lock-in-period for holding of units.No definition available.false256Lock in period for redemption of units following subscription15false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse4false USDtruefalse$D2013Q2YTD_LimitedPartnerMember_LegacyTwoClassMemberhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseLegacy 2 Class Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldigpff_LegacyTwoClassMemberus-gaap_StatementClassOfStockAxisexplicitMemberfalsefalseLimited Partnersus-gaap_PartnerTypeOfPartnersCapitalAccountAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LimitedPartnerMemberus-gaap_PartnerTypeOfPartnersCapitalAccountAxisexplicitMemberMonthStandardhttp://www.xbrl.org/2009/utrMutr0DayStandardhttp://www.xbrl.org/2009/utrDutr0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Legacy 2 Class Units16true 3gpff_PartnersCapitalRedemptionLineItemsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Redemptions17false 4gpff_PriorWrittenNoticePeriodByLimitedPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1010falsefalsefalsexbrli:integerItemTypeintegerRepresents the Limited Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by Limited Partner for redemption of Limited Partner units18false 4gpff_PriorWrittenNoticePeriodByGeneralPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1515falsefalsefalsexbrli:integerItemTypeintegerRepresents the General Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by General Partner for redemption of Limited Partner units19false 4gpff_RedemptionFeesApplicableForStockholdersWhoRedeemUnitsOnOrAfterOneYearAnniversaryOfSubscriptionsgpff_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions.No definition available.false2Redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions20false 4gpff_LockInPeriodForRedemptionOfUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse33falsefalsefalsexbrli:integerItemTypeintegerRepresents the lock-in-period for holding of units.No definition available.false256Lock in period for redemption of units following subscription21false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse5false USDtruefalse$D2013Q2YTD_LimitedPartnerMember_GlobalOneClassMemberhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseGlobal 1 Class Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldigpff_GlobalOneClassMemberus-gaap_StatementClassOfStockAxisexplicitMemberfalsefalseLimited Partnersus-gaap_PartnerTypeOfPartnersCapitalAccountAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LimitedPartnerMemberus-gaap_PartnerTypeOfPartnersCapitalAccountAxisexplicitMemberMonthStandardhttp://www.xbrl.org/2009/utrMutr0DayStandardhttp://www.xbrl.org/2009/utrDutr0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Global 1 Class Units22true 3gpff_PartnersCapitalRedemptionLineItemsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Redemptions23false 4gpff_PriorWrittenNoticePeriodByLimitedPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1010falsefalsefalsexbrli:integerItemTypeintegerRepresents the Limited Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by Limited Partner for redemption of Limited Partner units24false 4gpff_PriorWrittenNoticePeriodByGeneralPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1515falsefalsefalsexbrli:integerItemTypeintegerRepresents the General Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by General Partner for redemption of Limited Partner units25false 4gpff_RedemptionFeesApplicableForStockholdersWhoRedeemUnitsOnOrAfterOneYearAnniversaryOfSubscriptionsgpff_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions.No definition available.false2Redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions26false 4gpff_LockInPeriodForRedemptionOfUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse33falsefalsefalsexbrli:integerItemTypeintegerRepresents the lock-in-period for holding of units.No definition available.false256Lock in period for redemption of units following subscription27false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse6false USDtruefalse$D2013Q2YTD_LimitedPartnerMember_GlobalTwoClassMemberhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseGlobal 2 Class Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldigpff_GlobalTwoClassMemberus-gaap_StatementClassOfStockAxisexplicitMemberfalsefalseLimited Partnersus-gaap_PartnerTypeOfPartnersCapitalAccountAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LimitedPartnerMemberus-gaap_PartnerTypeOfPartnersCapitalAccountAxisexplicitMemberDayStandardhttp://www.xbrl.org/2009/utrDutr0MonthStandardhttp://www.xbrl.org/2009/utrMutr0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Global 2 Class Units28true 3gpff_PartnersCapitalRedemptionLineItemsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Redemptions29false 4gpff_PriorWrittenNoticePeriodByLimitedPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1010falsefalsefalsexbrli:integerItemTypeintegerRepresents the Limited Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by Limited Partner for redemption of Limited Partner units30false 4gpff_PriorWrittenNoticePeriodByGeneralPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1515falsefalsefalsexbrli:integerItemTypeintegerRepresents the General Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by General Partner for redemption of Limited Partner units31false 4gpff_RedemptionFeesApplicableForStockholdersWhoRedeemUnitsOnOrAfterOneYearAnniversaryOfSubscriptionsgpff_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions.No definition available.false2Redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions32false 4gpff_LockInPeriodForRedemptionOfUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse33falsefalsefalsexbrli:integerItemTypeintegerRepresents the lock-in-period for holding of units.No definition available.false256Lock in period for redemption of units following subscription33false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse7false USDtruefalse$D2013Q2YTD_LimitedPartnerMember_GlobalThreeClassMemberhttp://www.sec.gov/CIK0000845698duration2013-01-01T00:00:002013-06-30T00:00:00falsefalseGlobal 3 Class Unitsus-gaap_StatementClassOfStockAxisxbrldihttp://xbrl.org/2006/xbrldigpff_GlobalThreeClassMemberus-gaap_StatementClassOfStockAxisexplicitMemberfalsefalseLimited Partnersus-gaap_PartnerTypeOfPartnersCapitalAccountAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LimitedPartnerMemberus-gaap_PartnerTypeOfPartnersCapitalAccountAxisexplicitMemberDayStandardhttp://www.xbrl.org/2009/utrDutr0AnniversaryStandardhttp://www.grantparkfunds.com/20130630anniversarygpff0MonthStandardhttp://www.xbrl.org/2009/utrMutr0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Global 3 Class Units34true 3gpff_PartnersCapitalRedemptionLineItemsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Redemptions35false 4gpff_PriorWrittenNoticePeriodByLimitedPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1010falsefalsefalsexbrli:integerItemTypeintegerRepresents the Limited Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by Limited Partner for redemption of Limited Partner units36false 4gpff_PriorWrittenNoticePeriodByGeneralPartnerToRedeemUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1515falsefalsefalsexbrli:integerItemTypeintegerRepresents the General Partner prior written notice period for the redemption of Limited Partner units.No definition available.false256Notice period by General Partner for redemption of Limited Partner units37false 4gpff_MinimumPeriodOfHoldingOfUnitsAfterSubscriptionForNonApplicabilityOfRedemptionFeegpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse11falsefalsefalsexbrli:integerItemTypeintegerRepresents the minimum period of holding of units from the subscription date after which no redemption fees is applicable.No definition available.false256Minimum period of holding of units after which no redemption fees are applicable38false 4gpff_RedemptionFeesApplicableForStockholdersWhoRedeemUnitsOnOrAfterOneYearAnniversaryOfSubscriptionsgpff_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions.No definition available.false2Redemption fees applicable for stockholders who redeem units on or after one-year anniversary of subscriptions39false 4gpff_LockInPeriodForRedemptionOfUnitsgpff_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse33falsefalsefalsexbrli:integerItemTypeintegerRepresents the lock-in-period for holding of units.No definition available.false256Lock in period for redemption of units following subscriptionfalseSubscriptions, Redemptions and Allocation of Net Income or Loss (Details) (Limited Partners, USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.grantparkfunds.com/role/DisclosureSubscriptionsRedemptionsAndAllocationOfNetIncomeOrLossDetails139