<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Version>2.3.0.11</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ReportType />
  <ContextCount>584</ContextCount>
  <ElementCount>402</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>97</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>true</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - Consolidated Statements Of Earnings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/StatementConsolidatedStatementsOfEarnings</Role>
      <ShortName>Consolidated Statements Of Earnings</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00205 - Statement - Consolidated Statements Of Earnings (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/StatementConsolidatedStatementsOfEarningsParenthetical</Role>
      <ShortName>Consolidated Statements Of Earnings (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00300 - Statement - Consolidated Statements Of Partners' Capital</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/StatementConsolidatedStatementsOfPartnersCapital</Role>
      <ShortName>Consolidated Statements Of Partners' Capital</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00400 - Statement - Consolidated Statements Of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements Of Cash Flows</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>00405 - Statement - Consolidated Statements Of Cash Flows (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/StatementConsolidatedStatementsOfCashFlowsParenthetical</Role>
      <ShortName>Consolidated Statements Of Cash Flows (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10101 - Disclosure - Partnership Organization And Formation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosurePartnershipOrganizationAndFormation</Role>
      <ShortName>Partnership Organization And Formation</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10201 - Disclosure - Summary Of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary Of Significant Accounting Policies</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Business Combinations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureBusinessCombinations</Role>
      <ShortName>Business Combinations</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Quarterly Distributions Of Available Cash</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureQuarterlyDistributionsOfAvailableCash</Role>
      <ShortName>Quarterly Distributions Of Available Cash</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Supplemental Financial Statement Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSupplementalFinancialStatementInformation</Role>
      <ShortName>Supplemental Financial Statement Information</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Accounts And Notes Receivable, Net And Accounts Receivable Securitization</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureAccountsAndNotesReceivableNetAndAccountsReceivableSecuritization</Role>
      <ShortName>Accounts And Notes Receivable, Net And Accounts Receivable Securitization</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Goodwill And Intangible Assets, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureGoodwillAndIntangibleAssetsNet</Role>
      <ShortName>Goodwill And Intangible Assets, Net</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDebt</Role>
      <ShortName>Debt</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Partners' Capital</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosurePartnersCapital</Role>
      <ShortName>Partners' Capital</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Derivatives</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDerivatives</Role>
      <ShortName>Derivatives</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Transactions With Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureTransactionsWithRelatedParties</Role>
      <ShortName>Transactions With Related Parties</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Contingencies And Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureContingenciesAndCommitments</Role>
      <ShortName>Contingencies And Commitments</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Employee Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureEmployeeBenefits</Role>
      <ShortName>Employee Benefits</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>11401 - Disclosure - Net Earnings (Loss) Per Common Unitholders' Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureNetEarningsLossPerCommonUnitholdersInterest</Role>
      <ShortName>Net Earnings (Loss) Per Common Unitholders' Interest</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>11501 - Disclosure - Quarterly Data</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureQuarterlyData</Role>
      <ShortName>Quarterly Data</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>11601 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>11701 - Disclosure - Commitment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureCommitment</Role>
      <ShortName>Commitment</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>11801 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>11901 - Disclosure - Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureScheduleIParentOnlyBalanceSheetsStatementsOfEarningsAndCashFlows</Role>
      <ShortName>Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>12001 - Disclosure - Schedule II Valuation And Qualifying Accounts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureScheduleIiValuationAndQualifyingAccounts</Role>
      <ShortName>Schedule II Valuation And Qualifying Accounts</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>20202 - Disclosure - Summary Of Significant Accounting Policies (Policy)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicy</Role>
      <ShortName>Summary Of Significant Accounting Policies (Policy)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>30203 - Disclosure - Summary Of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary Of Significant Accounting Policies (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>30303 - Disclosure - Business Combinations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureBusinessCombinationsTables</Role>
      <ShortName>Business Combinations (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Supplemental Financial Statement Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSupplementalFinancialStatementInformationTables</Role>
      <ShortName>Supplemental Financial Statement Information (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>30603 - Disclosure - Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Tables)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureAccountsAndNotesReceivableNetAndAccountsReceivableSecuritizationTables</Role>
      <ShortName>Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Goodwill And Intangible Assets, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureGoodwillAndIntangibleAssetsNetTables</Role>
      <ShortName>Goodwill And Intangible Assets, Net (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>30903 - Disclosure - Partners' Capital (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosurePartnersCapitalTables</Role>
      <ShortName>Partners' Capital (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Derivatives (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDerivativesTables</Role>
      <ShortName>Derivatives (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>31103 - Disclosure - Transactions With Related Parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureTransactionsWithRelatedPartiesTables</Role>
      <ShortName>Transactions With Related Parties (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>31203 - Disclosure - Contingencies And Commitments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureContingenciesAndCommitmentsTables</Role>
      <ShortName>Contingencies And Commitments (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>31403 - Disclosure - Net Earnings (Loss) Per Common Unitholders' Interest (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureNetEarningsLossPerCommonUnitholdersInterestTables</Role>
      <ShortName>Net Earnings (Loss) Per Common Unitholders' Interest (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>31503 - Disclosure - Quarterly Data (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureQuarterlyDataTables</Role>
      <ShortName>Quarterly Data (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40101 - Disclosure - Partnership Organization And Formation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosurePartnershipOrganizationAndFormationDetails</Role>
      <ShortName>Partnership Organization And Formation (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40201 - Disclosure - Summary Of Significant Accounting Policies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSummaryOfSignificantAccountingPoliciesNarrativeDetails</Role>
      <ShortName>Summary Of Significant Accounting Policies (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40202 - Disclosure - Summary Of Significant Accounting Policies (Significant Cash And Non-Cash Activities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSummaryOfSignificantAccountingPoliciesSignificantCashAndNonCashActivitiesDetails</Role>
      <ShortName>Summary Of Significant Accounting Policies (Significant Cash And Non-Cash Activities) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40203 - Disclosure - Summary Of Significant Accounting Policies (Summary Of Income Tax Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfIncomeTaxExpenseDetails</Role>
      <ShortName>Summary Of Significant Accounting Policies (Summary Of Income Tax Expense) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40204 - Disclosure - Summary Of Significant Accounting Policies (Deferred Taxes Assets And Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSummaryOfSignificantAccountingPoliciesDeferredTaxesAssetsAndLiabilitiesDetails</Role>
      <ShortName>Summary Of Significant Accounting Policies (Deferred Taxes Assets And Liabilities) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40301 - Disclosure - Business Combinations (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureBusinessCombinationsNarrativeDetails</Role>
      <ShortName>Business Combinations (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>40302 - Disclosure - Business Combinations (Aggregate Fair Value) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureBusinessCombinationsAggregateFairValueDetails</Role>
      <ShortName>Business Combinations (Aggregate Fair Value) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>40401 - Disclosure - Quarterly Distributions Of Available Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureQuarterlyDistributionsOfAvailableCashDetails</Role>
      <ShortName>Quarterly Distributions Of Available Cash (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Supplemental Financial Statement Information (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSupplementalFinancialStatementInformationNarrativeDetails</Role>
      <ShortName>Supplemental Financial Statement Information (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Supplemental Financial Statement Information (Inventories) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSupplementalFinancialStatementInformationInventoriesDetails</Role>
      <ShortName>Supplemental Financial Statement Information (Inventories) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>40503 - Disclosure - Supplemental Financial Statement Information (Property, Plant And Equipment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSupplementalFinancialStatementInformationPropertyPlantAndEquipmentDetails</Role>
      <ShortName>Supplemental Financial Statement Information (Property, Plant And Equipment) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>40504 - Disclosure - Supplemental Financial Statement Information (Other Current Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSupplementalFinancialStatementInformationOtherCurrentLiabilitiesDetails</Role>
      <ShortName>Supplemental Financial Statement Information (Other Current Liabilities) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>40505 - Disclosure - Supplemental Financial Statement Information (Loss On Disposal Of Assets And Other) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSupplementalFinancialStatementInformationLossOnDisposalOfAssetsAndOtherDetails</Role>
      <ShortName>Supplemental Financial Statement Information (Loss On Disposal Of Assets And Other) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>40506 - Disclosure - Supplemental Financial Statement Information (Shipping And Handling Expenses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSupplementalFinancialStatementInformationShippingAndHandlingExpensesDetails</Role>
      <ShortName>Supplemental Financial Statement Information (Shipping And Handling Expenses) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Narrative) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureAccountsAndNotesReceivableNetAndAccountsReceivableSecuritizationNarrativeDetails</Role>
      <ShortName>Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>40602 - Disclosure - Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Accounts And Notes Receivable) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureAccountsAndNotesReceivableNetAndAccountsReceivableSecuritizationAccountsAndNotesReceivableDetails</Role>
      <ShortName>Accounts And Notes Receivable, Net And Accounts Receivable Securitization (Accounts And Notes Receivable) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Goodwill And Intangible Assets, Net (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureGoodwillAndIntangibleAssetsNetNarrativeDetails</Role>
      <ShortName>Goodwill And Intangible Assets, Net (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>40702 - Disclosure - Goodwill And Intangible Assets, Net (Goodwill And Intangible Assets, Net) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureGoodwillAndIntangibleAssetsNetGoodwillAndIntangibleAssetsNetDetails</Role>
      <ShortName>Goodwill And Intangible Assets, Net (Goodwill And Intangible Assets, Net) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>40703 - Disclosure - Goodwill And Intangible Assets, Net (Aggregate Amortization Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureGoodwillAndIntangibleAssetsNetAggregateAmortizationExpenseDetails</Role>
      <ShortName>Goodwill And Intangible Assets, Net (Aggregate Amortization Expense) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>40704 - Disclosure - Goodwill And Intangible Assets, Net (Estimated Amortization Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureGoodwillAndIntangibleAssetsNetEstimatedAmortizationExpenseDetails</Role>
      <ShortName>Goodwill And Intangible Assets, Net (Estimated Amortization Expense) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Debt (Short-Term Borrowings Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDebtShortTermBorrowingsNarrativeDetails</Role>
      <ShortName>Debt (Short-Term Borrowings Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>40802 - Disclosure - Debt (Senior Notes Narrative) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDebtSeniorNotesNarrativeDetails</Role>
      <ShortName>Debt (Senior Notes Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>40803 - Disclosure - Debt (Secured Credit Facility Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDebtSecuredCreditFacilityNarrativeDetails</Role>
      <ShortName>Debt (Secured Credit Facility Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>40804 - Disclosure - Debt (Covenants Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDebtCovenantsNarrativeDetails</Role>
      <ShortName>Debt (Covenants Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>40805 - Disclosure - Debt (Components Of Long-Term Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDebtComponentsOfLongTermDebtDetails</Role>
      <ShortName>Debt (Components Of Long-Term Debt) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>40806 - Disclosure - Debt (Scheduled Annual Principal Payments On Long-term Debt)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDebtScheduledAnnualPrincipalPaymentsOnLongTermDebt</Role>
      <ShortName>Debt (Scheduled Annual Principal Payments On Long-term Debt)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Partners' Capital (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosurePartnersCapitalNarrativeDetails</Role>
      <ShortName>Partners' Capital (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>40902 - Disclosure - Partners' Capital (Limited Partner Units) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosurePartnersCapitalLimitedPartnerUnitsDetails</Role>
      <ShortName>Partners' Capital (Limited Partner Units) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>40903 - Disclosure - Partners' Capital (Partners Distribution Paid) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosurePartnersCapitalPartnersDistributionPaidDetails</Role>
      <ShortName>Partners' Capital (Partners Distribution Paid) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>40904 - Disclosure - Partners' Capital (Declared Cash Distribution) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosurePartnersCapitalDeclaredCashDistributionDetails</Role>
      <ShortName>Partners' Capital (Declared Cash Distribution) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Derivatives (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDerivativesNarrativeDetails</Role>
      <ShortName>Derivatives (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>41002 - Disclosure - Derivatives (Fair Value Of The Financial Derivative Instruments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDerivativesFairValueOfFinancialDerivativeInstrumentsDetails</Role>
      <ShortName>Derivatives (Fair Value Of The Financial Derivative Instruments) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>41003 - Disclosure - Derivatives (Cash Flow Hedge Activity Included In OCI) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureDerivativesCashFlowHedgeActivityIncludedInOciDetails</Role>
      <ShortName>Derivatives (Cash Flow Hedge Activity Included In OCI) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>41101 - Disclosure - Transactions With Related Parties (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureTransactionsWithRelatedPartiesNarrativeDetails</Role>
      <ShortName>Transactions With Related Parties (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>41102 - Disclosure - Transactions With Related Parties (Primarily Include Compensation And Benefits Paid To Employees Of The General Partner) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureTransactionsWithRelatedPartiesPrimarilyIncludeCompensationAndBenefitsPaidToEmployeesOfGeneralPartnerDetails</Role>
      <ShortName>Transactions With Related Parties (Primarily Include Compensation And Benefits Paid To Employees Of The General Partner) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Contingencies And Commitments (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureContingenciesAndCommitmentsNarrativeDetails</Role>
      <ShortName>Contingencies And Commitments (Narrative) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>41202 - Disclosure - Contingencies And Commitments (Contractual Operating Lease Commitments And Buyout Obligations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureContingenciesAndCommitmentsContractualOperatingLeaseCommitmentsAndBuyoutObligationsDetails</Role>
      <ShortName>Contingencies And Commitments (Contractual Operating Lease Commitments And Buyout Obligations) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Employee Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureEmployeeBenefitsDetails</Role>
      <ShortName>Employee Benefits (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>41401 - Disclosure - Net Earnings (Loss) Per Common Unitholders' Interest (Basic And Diluted Net Earnings Per Common Unitholders' Interest) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureNetEarningsLossPerCommonUnitholdersInterestBasicAndDilutedNetEarningsPerCommonUnitholdersInterestDetails</Role>
      <ShortName>Net Earnings (Loss) Per Common Unitholders' Interest (Basic And Diluted Net Earnings Per Common Unitholders' Interest) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>41501 - Disclosure - Quarterly Data (Summarized Unaudited Quarterly Data) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureQuarterlyDataSummarizedUnauditedQuarterlyDataDetails</Role>
      <ShortName>Quarterly Data (Summarized Unaudited Quarterly Data) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>41601 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>41701 - Disclosure - Commitment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureCommitmentDetails</Role>
      <ShortName>Commitment (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>41801 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>41901 - Disclosure - Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Balance Sheets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureScheduleIParentOnlyBalanceSheetsStatementsOfEarningsAndCashFlowsBalanceSheetsDetails</Role>
      <ShortName>Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Balance Sheets) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>41902 - Disclosure - Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Statement Of Earnings) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureScheduleIParentOnlyBalanceSheetsStatementsOfEarningsAndCashFlowsStatementOfEarningsDetails</Role>
      <ShortName>Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Statement Of Earnings) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>41903 - Disclosure - Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Cash Flows) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureScheduleIParentOnlyBalanceSheetsStatementsOfEarningsAndCashFlowsCashFlowsDetails</Role>
      <ShortName>Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Cash Flows) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>41904 - Disclosure - Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Parenthetical) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureScheduleIParentOnlyBalanceSheetsStatementsOfEarningsAndCashFlowsParentheticalDetails</Role>
      <ShortName>Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Parenthetical) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>42001 - Disclosure - Schedule II Valuation And Qualifying Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.ferrellgas.com/2010-07-31/role/DisclosureScheduleIiValuationAndQualifyingAccountsDetails</Role>
      <ShortName>Schedule II Valuation And Qualifying Accounts (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <ContainEmbeddedReports>false</ContainEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Element us-gaap_Assets had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_CommonStockSharesOutstanding had a mix of decimals attribute values: 0 -5.</Log>
    <Log type="Info">Element us-gaap_GeneralAndAdministrativeExpense had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_GainsLossesOnExtinguishmentOfDebt had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element us-gaap_ProfitLoss had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering had a mix of decimals attribute values: -2 -5.</Log>
    <Log type="Info">Element us-gaap_ProfitLoss had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_ProfitLoss had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_ExtinguishmentOfDebtGainLossNetOfTax had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element us-gaap_NetCashProvidedByUsedInOperatingActivities had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_NetCashProvidedByUsedInFinancingActivities had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_CommonStockSharesOutstanding had a mix of decimals attribute values: 0 -5.</Log>
    <Log type="Info">Element us-gaap_InterestPayableCurrent had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element fgp_DebtInstrumentPrincipalAmountRedeemed had a mix of decimals attribute values: 0 -5.</Log>
    <Log type="Info">Element us-gaap_GainsLossesOnExtinguishmentOfDebt had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity had a mix of decimals attribute values: 0 -5.</Log>
    <Log type="Info">Element us-gaap_DebtInstrumentUnamortizedDiscount had a mix of decimals attribute values: 3 -3.</Log>
    <Log type="Info">Element us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering had a mix of decimals attribute values: -2 -5.</Log>
    <Log type="Info">Element us-gaap_DistributionMadeToMemberOrLimitedPartnerCashDistributionsPaid had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element fgp_DebtInstrumentPrincipalAmountRedeemed had a mix of decimals attribute values: 0 -5.</Log>
    <Log type="Info">Element us-gaap_DistributionMadeToMemberOrLimitedPartnerCashDistributionsPaid had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element us-gaap_GeneralAndAdministrativeExpense had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_OtherComprehensiveIncomeMinimumPensionLiabilityNetAdjustmentNetOfTax had a mix of decimals attribute values: -2 -5.</Log>
    <Log type="Info">Element us-gaap_ProfitLoss had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_ExtinguishmentOfDebtGainLossNetOfTax had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity had a mix of decimals attribute values: 0 -5.</Log>
    <Log type="Info">Element fgp_DebtInstrumentPrincipalAmountRedeemed had a mix of decimals attribute values: 0 -5.</Log>
    <Log type="Info">Element us-gaap_GainsLossesOnExtinguishmentOfDebt had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element us-gaap_InterestPayableCurrent had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element us-gaap_Assets had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_GainsLossesOnExtinguishmentOfDebt had a mix of decimals attribute values: -3 -5.</Log>
    <Log type="Info">Element us-gaap_ProfitLoss had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_ProfitLoss had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_NetCashProvidedByUsedInOperatingActivities had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_NetCashProvidedByUsedInFinancingActivities had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">Element us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease had a mix of decimals attribute values: 0 -3.</Log>
    <Log type="Info">'Monetary' elements on report '00100 - Statement - Consolidated Balance Sheets' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '00200 - Statement - Consolidated Statements Of Earnings' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '40201 - Disclosure - Summary Of Significant Accounting Policies (Narrative) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Shares' elements on report '40201 - Disclosure - Summary Of Significant Accounting Policies (Narrative) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '40301 - Disclosure - Business Combinations (Narrative) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '40901 - Disclosure - Partners' Capital (Narrative) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '41301 - Disclosure - Employee Benefits (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '41501 - Disclosure - Quarterly Data (Summarized Unaudited Quarterly Data) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '41901 - Disclosure - Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Balance Sheets) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '41902 - Disclosure - Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Statement Of Earnings) (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 00100 - Statement - Consolidated Balance Sheets</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Jul. 31, 2009'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Jul. 31, 2008'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Jul. 31, 2007'</Log>
    <Log type="Info">Process Flow-Through: 00105 - Statement - Consolidated Balance Sheets (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 00200 - Statement - Consolidated Statements Of Earnings</Log>
    <Log type="Info">	Process Flow-Through: Removing column '1 Months Ended
Oct. 31, 2009'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jul. 31, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Apr. 30, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jan. 31, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Oct. 31, 2010'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jul. 31, 2010'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Apr. 30, 2010'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jan. 31, 2010'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Oct. 31, 2009'</Log>
    <Log type="Info">Process Flow-Through: 00205 - Statement - Consolidated Statements Of Earnings (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 00400 - Statement - Consolidated Statements Of Cash Flows</Log>
    <Log type="Info">Process Flow-Through: 00405 - Statement - Consolidated Statements Of Cash Flows (Parenthetical)</Log>
  </Logs>
  <InputFiles>
    <File>fgp-20110731.xml</File>
    <File>fgp-20110731.xsd</File>
    <File>fgp-20110731_cal.xml</File>
    <File>fgp-20110731_def.xml</File>
    <File>fgp-20110731_lab.xml</File>
    <File>fgp-20110731_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
