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    <us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock contextRef="DYCurrentQuarterToDate">


          1.Basis of Presentation


          AMERCO, a Nevada corporation (&#x201c;AMERCO&#x201d; or the &#x201c;Company&#x201d;), has a second fiscal quarter that ends on the 30
          th
           of September for each year that is referenced. Our insurance company subsidiaries have a second quarter that ends on the 30
          th
           of June for each year that is referenced. They have been consolidated on that basis. Our insurance companies&#x2019; financial reporting processes conform to calendar year reporting as required by state insurance departments. Management believes that consolidating their calendar year into our fiscal year financial statements does not materially affect the presentation of financial position or results of operations. We disclose material events, if any, occurring during the intervening period. Consequently, all references to our insurance subsidiaries&#x2019; years 2022 and 2021 correspond to fiscal 2023 and 2022 for AMERCO.


          Accounts denominated in non-U.S. currencies have been translated into U.S. dollars.


          The condensed consolidated balance sheet as of September 30, 2022 and the related condensed consolidated statements of operations, comprehensive income (loss), stockholders&#x2019; equity for the second quarter and first six months of fiscal 2023 and 2022 and cash flows for the first six months of fiscal 2023 and 2022 are unaudited.


          In our opinion, all adjustments necessary for the fair presentation of such condensed consolidated financial statements have been included. Such adjustments consist only of normal recurring items. Interim results are not necessarily indicative of results for a full year. The information in this Quarterly Report on Form 10-Q (&#x201c;Quarterly Report&#x201d;) should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended March 31, 2022.


          Intercompany accounts and transactions have been eliminated.


          Description of Legal Entities


          AMERCO is the holding company for:


          U-Haul International, Inc. (&#x201c;U-Haul&#x201d;);


          Amerco Real Estate Company (&#x201c;Real Estate&#x201d;);


          Repwest Insurance Company (&#x201c;Repwest&#x201d;); and


          Oxford Life Insurance Company (&#x201c;Oxford&#x201d;).


          Unless the context otherwise requires, the terms &#x201c;Company,&#x201d; &#x201c;we,&#x201d; &#x201c;us&#x201d; or &#x201c;our&#x201d; refer to AMERCO and all of its legal subsidiaries.


          Description of Operating Segments


          AMERCO has three (

            3

          ) reportable segments. They are Moving and Storage, Property and Casualty Insurance and Life Insurance.


          The Moving and Storage operating segment (&#x201c;Moving and Storage&#x201d;) includes AMERCO, U-Haul and Real Estate and the wholly owned subsidiaries of U-Haul and Real Estate. Operations consist of the rental of trucks and trailers, sales of moving supplies, sales of towing accessories, sales of propane, and the rental of fixed and portable moving and storage units to the &#x201c;do-it-yourself&#x201d; mover and management of self-storage properties owned by others. Operations are conducted under the registered trade name U-Haul
          &#xae;
           throughout the United States and Canada.

        The Property and Casualty Insurance operating segment (&#x201c;Property and Casualty Insurance&#x201d;) includes Repwest and its wholly owned subsidiaries and ARCOA Risk Retention Group (&#x201c;ARCOA&#x201d;). Property and Casualty Insurance provides loss adjusting and claims handling for U-Haul&#xae; through regional offices in the United States and Canada. Property and Casualty Insurance also underwrites components of the Safemove&#xae;, Safetow&#xae;, Safemove Plus&#xae;, Safestor&#xae; and Safestor Mobile&#xae; protection packages to U-Haul customers. The business plan for Property and Casualty Insurance includes offering property and casualty insurance products in other U-Haul-related programs. ARCOA is a group captive insurer owned




          &#160;
          by us and our wholly owned subsidiaries whose purpose is to provide insurance products related to our moving and storage business.

      The Life Insurance operating segment (&#x201c;Life Insurance&#x201d;) includes Oxford and its wholly owned subsidiaries. Life Insurance provides life and health insurance products primarily to the senior market through the direct writing and reinsuring of life insurance, Medicare supplement and annuity policies.</us-gaap:BasisOfPresentationAndSignificantAccountingPoliciesTextBlock>
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      decimals="-3"
      unitRef="USD">615000000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="FYPriorEndYear_LongtermDebtTypeAxis_FleetLoansRevolvingCreditMember"
      decimals="-3"
      unitRef="USD">560000000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:LongTermDebtPercentageBearingFixedInterestRate
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_CapitalLeaseObligationsMember_RangeAxis_MinimumMember"
      decimals="4"
      unitRef="Pure">0.0216</us-gaap:LongTermDebtPercentageBearingFixedInterestRate>
    <us-gaap:LongTermDebtPercentageBearingFixedInterestRate
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_CapitalLeaseObligationsMember_RangeAxis_MaximumMember"
      decimals="4"
      unitRef="Pure">0.0504</us-gaap:LongTermDebtPercentageBearingFixedInterestRate>
    <uhal:MaturityStartYear contextRef="DYCurrentQuarterToDate_LongtermDebtTypeAxis_CapitalLeaseObligationsMember">2022</uhal:MaturityStartYear>
    <uhal:MaturityEndYear contextRef="DYCurrentQuarterToDate_LongtermDebtTypeAxis_CapitalLeaseObligationsMember">2026</uhal:MaturityEndYear>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_CapitalLeaseObligationsMember"
      decimals="-3"
      unitRef="USD">281562000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="FYPriorEndYear_LongtermDebtTypeAxis_CapitalLeaseObligationsMember"
      decimals="-3"
      unitRef="USD">347393000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:LongTermDebtPercentageBearingFixedInterestRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MinimumMember_LongtermDebtTypeAxis_FinanceLeaseMember"
      decimals="4"
      unitRef="Pure">0.0160</us-gaap:LongTermDebtPercentageBearingFixedInterestRate>
    <us-gaap:LongTermDebtPercentageBearingFixedInterestRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MaximumMember_LongtermDebtTypeAxis_FinanceLeaseMember"
      decimals="4"
      unitRef="Pure">0.0555</us-gaap:LongTermDebtPercentageBearingFixedInterestRate>
    <uhal:MaturityStartYear contextRef="DYCurrentSixMonthsToDate_LongtermDebtTypeAxis_FinanceLeaseMember">2024</uhal:MaturityStartYear>
    <uhal:MaturityEndYear contextRef="DYCurrentQuarterToDate_LongtermDebtTypeAxis_FinanceLeaseMember">2030</uhal:MaturityEndYear>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_FinanceLeaseMember"
      decimals="-3"
      unitRef="USD">1186855000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="FYPriorEndYear_LongtermDebtTypeAxis_FinanceLeaseMember"
      decimals="-3"
      unitRef="USD">949936000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:LongTermDebtPercentageBearingFixedInterestRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MinimumMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="4"
      unitRef="Pure">0.0243</us-gaap:LongTermDebtPercentageBearingFixedInterestRate>
    <us-gaap:LongTermDebtPercentageBearingFixedInterestRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MaximumMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="4"
      unitRef="Pure">0.0288</us-gaap:LongTermDebtPercentageBearingFixedInterestRate>
    <uhal:MaturityStartYear contextRef="DYCurrentQuarterToDate_LongtermDebtTypeAxis_UnsecuredDebtMember">2029</uhal:MaturityStartYear>
    <uhal:MaturityEndYear contextRef="DYCurrentQuarterToDate_LongtermDebtTypeAxis_UnsecuredDebtMember">2035</uhal:MaturityEndYear>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="-3"
      unitRef="USD">1200000000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="FYPriorEndYear_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="-3"
      unitRef="USD">1200000000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:LongTermDebtPercentageBearingFixedInterestRate
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_CollateralizedDebtObligationsMember_RangeAxis_MinimumMember"
      decimals="4"
      unitRef="Pure">0.0150</us-gaap:LongTermDebtPercentageBearingFixedInterestRate>
    <us-gaap:LongTermDebtPercentageBearingFixedInterestRate
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_CollateralizedDebtObligationsMember_RangeAxis_MaximumMember"
      decimals="4"
      unitRef="Pure">0.0800</us-gaap:LongTermDebtPercentageBearingFixedInterestRate>
    <uhal:MaturityStartYear contextRef="DYCurrentQuarterToDate_LongtermDebtTypeAxis_CollateralizedDebtObligationsMember">2022</uhal:MaturityStartYear>
    <uhal:MaturityEndYear contextRef="DYCurrentQuarterToDate_LongtermDebtTypeAxis_CollateralizedDebtObligationsMember">2049</uhal:MaturityEndYear>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_CollateralizedDebtObligationsMember"
      decimals="-3"
      unitRef="USD">78871000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:DebtInstrumentCarryingAmount
      contextRef="FYPriorEndYear_LongtermDebtTypeAxis_CollateralizedDebtObligationsMember"
      decimals="-3"
      unitRef="USD">86206000</us-gaap:DebtInstrumentCarryingAmount>
    <us-gaap:DeferredFinanceCostsNoncurrentGross
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">6336570000</us-gaap:DeferredFinanceCostsNoncurrentGross>
    <us-gaap:DeferredFinanceCostsNoncurrentGross contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">6059713000</us-gaap:DeferredFinanceCostsNoncurrentGross>
    <us-gaap:AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">37739000</us-gaap:AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts>
    <us-gaap:AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">37216000</us-gaap:AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts>
    <us-gaap:DeferredFinanceCostsNoncurrentNet
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">6298831000</us-gaap:DeferredFinanceCostsNoncurrentNet>
    <us-gaap:DeferredFinanceCostsNoncurrentNet contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">6022497000</us-gaap:DeferredFinanceCostsNoncurrentNet>
    <us-gaap:DebtInstrumentFaceAmount
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="-5"
      unitRef="USD">210600000</us-gaap:DebtInstrumentFaceAmount>
    <us-gaap:DebtInstrumentInterestRateEffectivePercentage
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="INF"
      unitRef="Pure">0.0010</us-gaap:DebtInstrumentInterestRateEffectivePercentage>
    <us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
      contextRef="DYCurrentQuarterToDate_RangeAxis_MinimumMember_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="4"
      unitRef="Pure">0.0231</us-gaap:DebtInstrumentBasisSpreadOnVariableRate1>
    <us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
      contextRef="DYCurrentQuarterToDate_RangeAxis_MaximumMember_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="4"
      unitRef="Pure">0.0251</us-gaap:DebtInstrumentBasisSpreadOnVariableRate1>
    <uhal:ApplicableMarginPerLoanAgreementMinimumRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MinimumMember_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="INF"
      unitRef="Pure">0.0065</uhal:ApplicableMarginPerLoanAgreementMinimumRate>
    <uhal:ApplicableMarginPerLoanAgreementMaximumRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MaximumMember_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="4"
      unitRef="Pure">0.0138</uhal:ApplicableMarginPerLoanAgreementMaximumRate>
    <uhal:ApplicableMarginsHighRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MinimumMember_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="4"
      unitRef="Pure">0.0306</uhal:ApplicableMarginsHighRate>
    <uhal:ApplicableMarginsHighRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MaximumMember_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="4"
      unitRef="Pure">0.0399</uhal:ApplicableMarginsHighRate>
    <us-gaap:LoansReceivableWithFixedRatesOfInterest1
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="-5"
      unitRef="USD">84200000</us-gaap:LoansReceivableWithFixedRatesOfInterest1>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_MortgagesMember_StatementBusinessSegmentsAxis_AmercoRealEstateSubsidiariesAndUhaulCompanyOfFloridaMember_VariableRateAxis_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"
      decimals="4"
      unitRef="Pure">0.0429</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_RangeAxis_MinimumMember_LongtermDebtTypeAxis_SeniorLoansMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0270</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_RangeAxis_MaximumMember_LongtermDebtTypeAxis_SeniorLoansMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0550</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtWeightedAverageInterestRate
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_SeniorLoansMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0409</us-gaap:DebtWeightedAverageInterestRate>
    <us-gaap:DebtInstrumentFaceAmount
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_RentalTruckRevolversMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="-5"
      unitRef="USD">150000000.0</us-gaap:DebtInstrumentFaceAmount>
    <us-gaap:DebtAndCapitalLeaseObligations
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_RentalTruckRevolversMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="-5"
      unitRef="USD">150000000.0</us-gaap:DebtAndCapitalLeaseObligations>
    <us-gaap:LongTermDebtPercentageBearingVariableInterestRate
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MinimumMember_LongtermDebtTypeAxis_RentalTruckRevolversMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0226</us-gaap:LongTermDebtPercentageBearingVariableInterestRate>
    <us-gaap:LongTermDebtPercentageBearingVariableInterestRate
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MaximumMember_LongtermDebtTypeAxis_RentalTruckRevolversMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0252</us-gaap:LongTermDebtPercentageBearingVariableInterestRate>
    <us-gaap:DebtInstrumentInterestRateEffectivePercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MinimumMember_LongtermDebtTypeAxis_RentalTruckRevolversMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0140</us-gaap:DebtInstrumentInterestRateEffectivePercentage>
    <us-gaap:DebtInstrumentInterestRateEffectivePercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MaximumMember_LongtermDebtTypeAxis_RentalTruckRevolversMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0150</us-gaap:DebtInstrumentInterestRateEffectivePercentage>
    <uhal:ApplicableMarginsHighRate
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MinimumMember_LongtermDebtTypeAxis_RentalTruckRevolversMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0376</uhal:ApplicableMarginsHighRate>
    <uhal:ApplicableMarginsHighRate
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MaximumMember_LongtermDebtTypeAxis_RentalTruckRevolversMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0402</uhal:ApplicableMarginsHighRate>
    <us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_RevolvingCreditFacilityMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="-5"
      unitRef="USD">150000000.0</us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity>
    <us-gaap:PropertyManagementFeePercentFee
      contextRef="DYCurrentQuarterToDate_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_RevolvingCreditFacilityMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="INF"
      unitRef="Pure">0.0030</us-gaap:PropertyManagementFeePercentFee>
    <us-gaap:LineOfCreditFacilityIncreaseDecreaseOtherNet
      contextRef="DYCurrentQuarterToDate_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_RevolvingCreditFacilityMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="-5"
      unitRef="USD">465000000</us-gaap:LineOfCreditFacilityIncreaseDecreaseOtherNet>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MinimumMember_LongtermDebtTypeAxis_MediumTermNotesMember_StatementBusinessSegmentsAxis_UhaulIntlAndSubsidiariesMember"
      decimals="4"
      unitRef="Pure">0.0161</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MaximumMember_LongtermDebtTypeAxis_MediumTermNotesMember_StatementBusinessSegmentsAxis_UhaulIntlAndSubsidiariesMember"
      decimals="4"
      unitRef="Pure">0.0499</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtInstrumentFaceAmount
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="-5"
      unitRef="USD">615000000.0</us-gaap:DebtInstrumentFaceAmount>
    <us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="-5"
      unitRef="USD">615000000.0</us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity>
    <us-gaap:DebtInstrumentInterestRateEffectivePercentage
      contextRef="EndOfCurrentQuarter_RangeAxis_MinimumMember_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0228</us-gaap:DebtInstrumentInterestRateEffectivePercentage>
    <us-gaap:DebtInstrumentInterestRateEffectivePercentage
      contextRef="EndOfCurrentQuarter_RangeAxis_MaximumMember_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0260</us-gaap:DebtInstrumentInterestRateEffectivePercentage>
    <us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
      contextRef="DYCurrentQuarterToDate_RangeAxis_MinimumMember_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0115</us-gaap:DebtInstrumentBasisSpreadOnVariableRate1>
    <us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
      contextRef="DYCurrentQuarterToDate_RangeAxis_MaximumMember_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0125</us-gaap:DebtInstrumentBasisSpreadOnVariableRate1>
    <uhal:ApplicableMarginsHighRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MinimumMember_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0353</uhal:ApplicableMarginsHighRate>
    <uhal:ApplicableMarginsHighRate
      contextRef="EndOfCurrentQuarter_RangeAxis_MaximumMember_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0395</uhal:ApplicableMarginsHighRate>
    <us-gaap:LoansReceivableWithFixedRatesOfInterest1
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="-5"
      unitRef="USD">615000000.0</us-gaap:LoansReceivableWithFixedRatesOfInterest1>
    <us-gaap:CapitalLeaseObligationsIncurred
      contextRef="DYCurrentQuarterToDate"
      decimals="-5"
      unitRef="USD">100000000.0</us-gaap:CapitalLeaseObligationsIncurred>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_LongtermDebtTypeAxis_LineOfCreditMember_StatementBusinessSegmentsAxis_VariousSubsidiariesOfAmercoRealEstateAndUhaulIntlMember"
      decimals="4"
      unitRef="Pure">0.0236</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:SaleLeasebackTransactionLeaseTerms contextRef="DYCurrentQuarterToDate_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_FinanceLeaseMember">(7) year terms</us-gaap:SaleLeasebackTransactionLeaseTerms>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MinimumMember_LongtermDebtTypeAxis_FinanceLeaseMember"
      decimals="4"
      unitRef="Pure">0.0216</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MaximumMember_LongtermDebtTypeAxis_FinanceLeaseMember"
      decimals="4"
      unitRef="Pure">0.0504</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:PropertyPlantAndEquipmentOtherNet
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_FinanceLeaseMember"
      decimals="-5"
      unitRef="USD">529000000.0</us-gaap:PropertyPlantAndEquipmentOtherNet>
    <us-gaap:PropertyPlantAndEquipmentOtherNet
      contextRef="FYPriorEndYear_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_FinanceLeaseMember"
      decimals="-5"
      unitRef="USD">620800000</us-gaap:PropertyPlantAndEquipmentOtherNet>
    <us-gaap:SaleLeasebackTransactionLeaseTerms contextRef="DYCurrentQuarterToDate_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_CapitalLeaseObligationsMember">seven (7) years</us-gaap:SaleLeasebackTransactionLeaseTerms>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MinimumMember_LongtermDebtTypeAxis_CapitalLeaseObligationsMember"
      decimals="4"
      unitRef="Pure">0.0160</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MaximumMember_LongtermDebtTypeAxis_CapitalLeaseObligationsMember"
      decimals="4"
      unitRef="Pure">0.0555</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:PropertyPlantAndEquipmentOtherNet
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_CapitalLeaseObligationsMember"
      decimals="-5"
      unitRef="USD">1369800000</us-gaap:PropertyPlantAndEquipmentOtherNet>
    <us-gaap:PropertyPlantAndEquipmentOtherNet
      contextRef="FYPriorEndYear_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_CapitalLeaseObligationsMember"
      decimals="-5"
      unitRef="USD">1068300000</us-gaap:PropertyPlantAndEquipmentOtherNet>
    <us-gaap:DebtInstrumentFaceAmount
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="-5"
      unitRef="USD">600000000.0</us-gaap:DebtInstrumentFaceAmount>
    <us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="-5"
      unitRef="USD">150000000.0</us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MinimumMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="4"
      unitRef="Pure">0.0243</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtInstrumentInterestRateStatedPercentage
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_RangeAxis_MaximumMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="4"
      unitRef="Pure">0.0278</us-gaap:DebtInstrumentInterestRateStatedPercentage>
    <us-gaap:DebtInstrumentFaceAmount
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="-5"
      unitRef="USD">600000000.0</us-gaap:DebtInstrumentFaceAmount>
    <us-gaap:LoansReceivableWithFixedRatesOfInterest1
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="-5"
      unitRef="USD">100000000.0</us-gaap:LoansReceivableWithFixedRatesOfInterest1>
    <us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
      contextRef="EndOfCurrentQuarter_ConsolidatedEntitiesAxis_ParentCompanyMember_LongtermDebtTypeAxis_UnsecuredDebtMember"
      decimals="-5"
      unitRef="USD">150000000.0</us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity>
    <us-gaap:DebtInstrumentInterestRateEffectivePercentage
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      unitRef="USD">17106000</us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount>
    <us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">46811000</us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount>
    <us-gaap:FinanceLeaseLiability
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">281562000</us-gaap:FinanceLeaseLiability>
    <us-gaap:OperatingLeaseLiability
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">67858000</us-gaap:OperatingLeaseLiability>
    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYCurrentQuarterToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">7827000</us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYPriorQuarterToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">7428000</us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYCurrentQuarterToDate_RelatedPartyTransactionsByRelatedPartyAxis_MercuryMember"
      decimals="-3"
      unitRef="USD">1450000</us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYPriorQuarterToDate_RelatedPartyTransactionsByRelatedPartyAxis_MercuryMember"
      decimals="-3"
      unitRef="USD">1319000</us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax>
    <us-gaap:RevenueFromRelatedParties
      contextRef="DYCurrentQuarterToDate"
      decimals="-3"
      unitRef="USD">9277000</us-gaap:RevenueFromRelatedParties>
    <us-gaap:RevenueFromRelatedParties
      contextRef="DYPriorQuarterToDate"
      decimals="-3"
      unitRef="USD">8747000</us-gaap:RevenueFromRelatedParties>
    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">15556000</us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">14608000</us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_MercuryMember"
      decimals="-3"
      unitRef="USD">2860000</us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax>
    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_MercuryMember"
      decimals="-3"
      unitRef="USD">2588000</us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax>
    <us-gaap:RevenueFromRelatedParties
      contextRef="DYCurrentSixMonthsToDate"
      decimals="-3"
      unitRef="USD">18416000</us-gaap:RevenueFromRelatedParties>
    <us-gaap:RevenueFromRelatedParties
      contextRef="DYPriorSixMonthsToDate"
      decimals="-3"
      unitRef="USD">17196000</us-gaap:RevenueFromRelatedParties>
    <us-gaap:PropertyManagementFeePercentFee
      contextRef="DYCurrentSixMonthsToDate_RangeAxis_MinimumMember_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMember"
      decimals="INF"
      unitRef="Pure">0.04</us-gaap:PropertyManagementFeePercentFee>
    <us-gaap:PropertyManagementFeePercentFee
      contextRef="DYCurrentSixMonthsToDate_RangeAxis_MaximumMember_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMember"
      decimals="INF"
      unitRef="Pure">0.10</us-gaap:PropertyManagementFeePercentFee>
    <us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMember"
      decimals="-5"
      unitRef="USD">16900000</us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty>
    <us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMember"
      decimals="-5"
      unitRef="USD">19400000</us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty>
    <us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMember"
      decimals="-5"
      unitRef="USD">4000000.0</us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty>
    <us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
      contextRef="DYCurrentQuarterToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">604000</us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty>
    <us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
      contextRef="DYPriorQuarterToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">611000</us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty>
    <us-gaap:OtherGeneralAndAdministrativeExpense
      contextRef="DYCurrentQuarterToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">26385000</us-gaap:OtherGeneralAndAdministrativeExpense>
    <us-gaap:OtherGeneralAndAdministrativeExpense
      contextRef="DYPriorQuarterToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">26536000</us-gaap:OtherGeneralAndAdministrativeExpense>
    <us-gaap:CostsAndExpensesRelatedParty
      contextRef="DYCurrentQuarterToDate"
      decimals="-3"
      unitRef="USD">26989000</us-gaap:CostsAndExpensesRelatedParty>
    <us-gaap:CostsAndExpensesRelatedParty
      contextRef="DYPriorQuarterToDate"
      decimals="-3"
      unitRef="USD">27147000</us-gaap:CostsAndExpensesRelatedParty>
    <us-gaap:OtherGeneralAndAdministrativeExpense
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">51267000</us-gaap:OtherGeneralAndAdministrativeExpense>
    <us-gaap:OtherGeneralAndAdministrativeExpense
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">49416000</us-gaap:OtherGeneralAndAdministrativeExpense>
    <us-gaap:CostsAndExpensesRelatedParty
      contextRef="DYCurrentSixMonthsToDate"
      decimals="-3"
      unitRef="USD">52475000</us-gaap:CostsAndExpensesRelatedParty>
    <us-gaap:CostsAndExpensesRelatedParty
      contextRef="DYPriorSixMonthsToDate"
      decimals="-3"
      unitRef="USD">50653000</us-gaap:CostsAndExpensesRelatedParty>
    <us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">15600000</us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty>
    <us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">14600000</us-gaap:RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty>
    <us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">1200000</us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty>
    <us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">1200000</us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty>
    <uhal:CashGeneratedFromAgreementsAndNotes
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">14300000</uhal:CashGeneratedFromAgreementsAndNotes>
    <uhal:CashGeneratedFromAgreementsAndNotes
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">13300000</uhal:CashGeneratedFromAgreementsAndNotes>
    <uhal:ContractRevenues
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">245000000.0</uhal:ContractRevenues>
    <uhal:ContractRevenues
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">234600000</uhal:ContractRevenues>
    <us-gaap:OtherGeneralAndAdministrativeExpense
      contextRef="DYCurrentSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">51300000</us-gaap:OtherGeneralAndAdministrativeExpense>
    <us-gaap:OtherGeneralAndAdministrativeExpense
      contextRef="DYPriorSixMonthsToDate_RelatedPartyTransactionsByRelatedPartyAxis_SacHoldingsMercuryFourSacFiveSacGalaxyAndPrivateMiniMember"
      decimals="-5"
      unitRef="USD">49400000</us-gaap:OtherGeneralAndAdministrativeExpense>
    <us-gaap:NotesReceivableRelatedParties
      contextRef="EndOfCurrentQuarter_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">44109000</us-gaap:NotesReceivableRelatedParties>
    <us-gaap:NotesReceivableRelatedParties
      contextRef="FYPriorEndYear_RelatedPartyTransactionsByRelatedPartyAxis_BlackwaterMember"
      decimals="-3"
      unitRef="USD">41364000</us-gaap:NotesReceivableRelatedParties>
    <us-gaap:NotesReceivableRelatedParties
      contextRef="EndOfCurrentQuarter_RelatedPartyTransactionsByRelatedPartyAxis_MercuryMember"
      decimals="-3"
      unitRef="USD">5399000</us-gaap:NotesReceivableRelatedParties>
    <us-gaap:NotesReceivableRelatedParties
      contextRef="FYPriorEndYear_RelatedPartyTransactionsByRelatedPartyAxis_MercuryMember"
      decimals="-3"
      unitRef="USD">5708000</us-gaap:NotesReceivableRelatedParties>
    <uhal:DueToRelatedParties
      contextRef="EndOfCurrentQuarter_RelatedPartyTransactionsByRelatedPartyAxis_InsuranceGroupMember"
      decimals="-3"
      unitRef="USD">-1171000</uhal:DueToRelatedParties>
    <uhal:DueToRelatedParties
      contextRef="FYPriorEndYear_RelatedPartyTransactionsByRelatedPartyAxis_InsuranceGroupMember"
      decimals="-3"
      unitRef="USD">779000</uhal:DueToRelatedParties>
    <us-gaap:DueFromRelatedParties
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">48337000</us-gaap:DueFromRelatedParties>
    <us-gaap:DueFromRelatedParties contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">47851000</us-gaap:DueFromRelatedParties>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">3025390000</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">11196000</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">28529000</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <us-gaap:CashAndCashEquivalentsAtCarryingValue
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">3065115000</us-gaap:CashAndCashEquivalentsAtCarryingValue>
    <uhal:ReinsuranceRecoverablesAndTradeReceivablesNet
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">117336000</uhal:ReinsuranceRecoverablesAndTradeReceivablesNet>
    <uhal:ReinsuranceRecoverablesAndTradeReceivablesNet
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">51720000</uhal:ReinsuranceRecoverablesAndTradeReceivablesNet>
    <uhal:ReinsuranceRecoverablesAndTradeReceivablesNet
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">34146000</uhal:ReinsuranceRecoverablesAndTradeReceivablesNet>
    <uhal:ReinsuranceRecoverablesAndTradeReceivablesNet
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</uhal:ReinsuranceRecoverablesAndTradeReceivablesNet>
    <uhal:ReinsuranceRecoverablesAndTradeReceivablesNet
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">203202000</uhal:ReinsuranceRecoverablesAndTradeReceivablesNet>
    <us-gaap:InventoryNet
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">166136000</us-gaap:InventoryNet>
    <us-gaap:InventoryNet
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:InventoryNet>
    <us-gaap:InventoryNet
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:InventoryNet>
    <us-gaap:InventoryNet
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:InventoryNet>
    <us-gaap:InventoryNet
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">166136000</us-gaap:InventoryNet>
    <us-gaap:OtherPrepaidExpenseCurrent
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">236035000</us-gaap:OtherPrepaidExpenseCurrent>
    <us-gaap:OtherPrepaidExpenseCurrent
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:OtherPrepaidExpenseCurrent>
    <us-gaap:OtherPrepaidExpenseCurrent
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:OtherPrepaidExpenseCurrent>
    <us-gaap:OtherPrepaidExpenseCurrent
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:OtherPrepaidExpenseCurrent>
    <us-gaap:OtherPrepaidExpenseCurrent
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">236035000</us-gaap:OtherPrepaidExpenseCurrent>
    <us-gaap:MarketableSecurities
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:MarketableSecurities>
    <us-gaap:MarketableSecurities
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">267482000</us-gaap:MarketableSecurities>
    <us-gaap:MarketableSecurities
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">2348276000</us-gaap:MarketableSecurities>
    <us-gaap:MarketableSecurities
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:MarketableSecurities>
    <us-gaap:MarketableSecurities
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">2615758000</us-gaap:MarketableSecurities>
    <us-gaap:Investments
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">20653000</us-gaap:Investments>
    <us-gaap:Investments
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">119926000</us-gaap:Investments>
    <us-gaap:Investments
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">407619000</us-gaap:Investments>
    <us-gaap:Investments
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:Investments>
    <us-gaap:Investments
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">548198000</us-gaap:Investments>
    <us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired>
    <us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired>
    <us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">146778000</us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired>
    <us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired>
    <us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">146778000</us-gaap:DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired>
    <us-gaap:DepositsAssets
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">44194000</us-gaap:DepositsAssets>
    <us-gaap:DepositsAssets
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">698000</us-gaap:DepositsAssets>
    <us-gaap:DepositsAssets
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">3008000</us-gaap:DepositsAssets>
    <us-gaap:DepositsAssets
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:DepositsAssets>
    <us-gaap:DepositsAssets
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">47900000</us-gaap:DepositsAssets>
    <us-gaap:FinanceLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">529000000</us-gaap:FinanceLeaseRightOfUseAsset>
    <us-gaap:FinanceLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:FinanceLeaseRightOfUseAsset>
    <us-gaap:FinanceLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:FinanceLeaseRightOfUseAsset>
    <us-gaap:FinanceLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:FinanceLeaseRightOfUseAsset>
    <us-gaap:FinanceLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">529000000</us-gaap:FinanceLeaseRightOfUseAsset>
    <us-gaap:OperatingLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">67107000</us-gaap:OperatingLeaseRightOfUseAsset>
    <us-gaap:OperatingLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">1039000</us-gaap:OperatingLeaseRightOfUseAsset>
    <us-gaap:OperatingLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
      decimals="-3"
      unitRef="USD">62000</us-gaap:OperatingLeaseRightOfUseAsset>
    <us-gaap:OperatingLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">0</us-gaap:OperatingLeaseRightOfUseAsset>
    <us-gaap:OperatingLeaseRightOfUseAsset
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">68208000</us-gaap:OperatingLeaseRightOfUseAsset>
    <us-gaap:DueFromRelatedParties
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
      decimals="-3"
      unitRef="USD">66682000</us-gaap:DueFromRelatedParties>
    <us-gaap:DueFromRelatedParties
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
      decimals="-3"
      unitRef="USD">5862000</us-gaap:DueFromRelatedParties>
    <us-gaap:DueFromRelatedParties
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_LifeInsuranceMember"
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      unitRef="USD">13234000</us-gaap:DueFromRelatedParties>
    <us-gaap:DueFromRelatedParties
      contextRef="EndOfCurrentQuarter_ConsolidationItemsAxis_ConsolidationEliminationsMember"
      decimals="-3"
      unitRef="USD">-37441000</us-gaap:DueFromRelatedParties>
    <us-gaap:DueFromRelatedParties
      contextRef="EndOfCurrentQuarter"
      decimals="-3"
      unitRef="USD">48337000</us-gaap:DueFromRelatedParties>
    <uhal:SubtotalAssets
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    <us-gaap:PropertySubjectToOrAvailableForOperatingLeaseGross
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    <us-gaap:PropertySubjectToOrAvailableForOperatingLeaseGross
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    <us-gaap:PropertySubjectToOrAvailableForOperatingLeaseGross
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    <us-gaap:PropertySubjectToOrAvailableForOperatingLeaseGross
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    <us-gaap:PropertySubjectToOrAvailableForOperatingLeaseGross
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    <us-gaap:PropertySubjectToOrAvailableForOperatingLeaseGross
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    <us-gaap:PropertySubjectToOrAvailableForOperatingLeaseGross
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    <us-gaap:OperatingLeaseLiability
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    <us-gaap:OperatingLeaseLiability
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    <us-gaap:PolicyholderFunds
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      unitRef="USD">7291000</us-gaap:PolicyholderFunds>
    <us-gaap:PolicyholderFunds
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    <us-gaap:PolicyholderFunds contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">10812000</us-gaap:PolicyholderFunds>
    <us-gaap:DeferredRevenue
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    <us-gaap:DeferredRevenue
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    <us-gaap:DeferredRevenue
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    <us-gaap:DeferredRevenue
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    <us-gaap:DeferredRevenue contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">49157000</us-gaap:DeferredRevenue>
    <us-gaap:DeferredTaxLiabilities
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    <us-gaap:DeferredTaxLiabilities
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    <us-gaap:DeferredTaxLiabilities
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    <us-gaap:DeferredTaxLiabilities
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    <us-gaap:DeferredTaxLiabilities contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">1265358000</us-gaap:DeferredTaxLiabilities>
    <us-gaap:DueToRelatedPartiesCurrentAndNoncurrent
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    <us-gaap:DueToRelatedPartiesCurrentAndNoncurrent
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    <us-gaap:DueToRelatedPartiesCurrentAndNoncurrent
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    <us-gaap:DueToRelatedPartiesCurrentAndNoncurrent
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    <us-gaap:Liabilities
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    <us-gaap:Liabilities
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    <us-gaap:Liabilities
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    <us-gaap:Liabilities
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:PreferredStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:CommonStockValue
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    <us-gaap:AdditionalPaidInCapital
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    <us-gaap:AdditionalPaidInCapital
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    <us-gaap:AdditionalPaidInCapital
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    <us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
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    <us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
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    <us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
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    <us-gaap:RetainedEarningsAccumulatedDeficit
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    <us-gaap:RetainedEarningsAccumulatedDeficit
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    <us-gaap:RetainedEarningsAccumulatedDeficit
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    <us-gaap:TreasuryStockValue
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    <us-gaap:TreasuryStockValue
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    <us-gaap:TreasuryStockValue
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    <us-gaap:TreasuryStockValue
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    <us-gaap:TreasuryStockValue
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    <us-gaap:TreasuryStockValue
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    <us-gaap:TreasuryStockValue
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    <us-gaap:TreasuryStockValue
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    <us-gaap:TreasuryStockValue
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    <us-gaap:StockholdersEquity
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    <us-gaap:StockholdersEquity
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    <us-gaap:StockholdersEquity
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    <us-gaap:StockholdersEquity
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    <us-gaap:LiabilitiesAndStockholdersEquity
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    <us-gaap:LiabilitiesAndStockholdersEquity
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    <us-gaap:LiabilitiesAndStockholdersEquity
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    <us-gaap:OperatingLeaseLeaseIncome
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    <us-gaap:OperatingLeaseLeaseIncome
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    <us-gaap:OperatingLeaseLeaseIncome
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    <us-gaap:OperatingLeaseLeaseIncome
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    <uhal:SelfStorageRevenues
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    <uhal:SelfStorageRevenues
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    <uhal:SelfStorageRevenues
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    <uhal:SelfStorageRevenues
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    <uhal:SaleRevenuesGoodsGross
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    <uhal:SaleRevenuesGoodsGross
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    <uhal:SaleRevenuesGoodsGross
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    <uhal:SaleRevenuesGoodsGross
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    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
      contextRef="DYCurrentQuarterToDate_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
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    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
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    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
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    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
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    <us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
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    <us-gaap:PremiumsEarnedNetLife
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    <us-gaap:PremiumsEarnedNetLife
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    <us-gaap:PremiumsEarnedNetLife
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    <us-gaap:PremiumsEarnedNetLife
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    <us-gaap:PremiumsEarnedNetPropertyAndCasualty
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    <us-gaap:PremiumsEarnedNetPropertyAndCasualty
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    <us-gaap:PremiumsEarnedNetPropertyAndCasualty
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    <uhal:InvestmentIncomeLossInterestAndDividend
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    <us-gaap:OtherIncome
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    <us-gaap:OtherIncome
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    <us-gaap:Revenues
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    <us-gaap:Revenues
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    <us-gaap:OperatingExpenses
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    <us-gaap:SalesCommissionsAndFees
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    <us-gaap:CostOfGoodsAndServicesSold
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    <us-gaap:PolicyholderBenefitsAndClaimsIncurredNet
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    <us-gaap:PolicyholderBenefitsAndClaimsIncurredNet
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    <us-gaap:InterestExpense
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    <us-gaap:InterestExpense
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    <us-gaap:InterestExpense
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    <us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
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    <us-gaap:IncomeTaxExpenseBenefit
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    <us-gaap:NetIncomeLoss
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    <us-gaap:OperatingLeaseLeaseIncome
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    <us-gaap:OperatingLeaseLeaseIncome
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    <us-gaap:PremiumsEarnedNetLife
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    <us-gaap:PremiumsEarnedNetLife
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    <us-gaap:PremiumsEarnedNetPropertyAndCasualty
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    <us-gaap:PremiumsEarnedNetPropertyAndCasualty
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    <us-gaap:IncreaseDecreaseInOtherInsuranceLiabilities
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    <us-gaap:IncreaseDecreaseInOtherInsuranceLiabilities
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    <us-gaap:IncreaseDecreaseInOtherPolicyholderFunds
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    <us-gaap:IncreaseDecreaseInOtherPolicyholderFunds
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    <us-gaap:IncreaseDecreaseInDeferredRevenue
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    <us-gaap:IncreaseDecreaseInDeferredRevenue
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      contextRef="DYCurrentSixMonthsToDate_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
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    <us-gaap:IncreaseDecreaseInOtherOperatingAssets
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      contextRef="DYPriorSixMonthsToDate_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
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    <us-gaap:IncreaseDecreaseInDueFromRelatedPartiesCurrent
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    <us-gaap:IncreaseDecreaseInDueFromRelatedPartiesCurrent
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    <us-gaap:IncreaseDecreaseInDueFromRelatedPartiesCurrent
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    <us-gaap:IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities
      contextRef="DYPriorSixMonthsToDate_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_MovingAndStorageConsolidationsMember"
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    <us-gaap:IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities
      contextRef="DYPriorSixMonthsToDate_ConsolidationItemsAxis_OperatingSegmentsMember_StatementBusinessSegmentsAxis_PropertyAndCasualtyInsuranceMember"
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    <us-gaap:IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities
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    <us-gaap:IncreaseDecreaseInOtherInsuranceLiabilities
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      unitRef="USD">18968000</us-gaap:IncreaseDecreaseInOtherInsuranceLiabilities>
    <us-gaap:IncreaseDecreaseInOtherPolicyholderFunds
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    <us-gaap:IncreaseDecreaseInOtherPolicyholderFunds
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    <us-gaap:IncreaseDecreaseInOtherPolicyholderFunds
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    <us-gaap:IncreaseDecreaseInOtherPolicyholderFunds
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    <us-gaap:IncreaseDecreaseInOtherPolicyholderFunds
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    <us-gaap:IncreaseDecreaseInDeferredRevenue
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    <us-gaap:IncreaseDecreaseInDeferredRevenue
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    <us-gaap:IncreaseDecreaseInDeferredRevenue
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    <us-gaap:IncreaseDecreaseInDueToRelatedPartiesCurrent
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    <us-gaap:NetCashProvidedByUsedInOperatingActivities
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    <us-gaap:NetCashProvidedByUsedInOperatingActivities
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    <us-gaap:IncreaseDecreaseInDepositOtherAssets
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    <us-gaap:IncreaseDecreaseInDepositOtherAssets
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    <us-gaap:IncreaseDecreaseInDepositOtherAssets
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    <us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
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    <us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
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    <us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
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    <us-gaap:PaymentsToAcquireShortTermInvestments
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    <us-gaap:PaymentsToAcquireShortTermInvestments
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    <us-gaap:PaymentsToAcquireShortTermInvestments
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    <us-gaap:PaymentsToAcquireHeldToMaturitySecurities
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    <us-gaap:PaymentsToAcquireInvestments
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    <us-gaap:PaymentsToAcquireInvestments
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    <us-gaap:PaymentsToAcquireRealEstateHeldForInvestment
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    <us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment
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    <us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment
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    <us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment
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    <us-gaap:ProceedsFromSaleOfShortTermInvestments
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    <us-gaap:ProceedsFromSaleOfShortTermInvestments
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    <us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">11354000</us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears>
    <us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">8694000</us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears>
    <us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">6937000</us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears>
    <us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">4884000</us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears>
    <us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">39491000</us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter>
    <uhal:RevenuesRecognizedOverTime
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      decimals="-3"
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      contextRef="DYPriorQuarterToDate"
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      contextRef="DYCurrentQuarterToDate"
      decimals="-3"
      unitRef="USD">118966000</uhal:RevenuesRecognizedAtPointInTime>
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      contextRef="DYPriorQuarterToDate"
      decimals="-3"
      unitRef="USD">110924000</uhal:RevenuesRecognizedAtPointInTime>
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      contextRef="DYCurrentQuarterToDate"
      decimals="-3"
      unitRef="USD">246057000</uhal:RevenuesFromContractsRecognizedOverTimeAndPointInTime>
    <uhal:RevenuesFromContractsRecognizedOverTimeAndPointInTime
      contextRef="DYPriorQuarterToDate"
      decimals="-3"
      unitRef="USD">218962000</uhal:RevenuesFromContractsRecognizedOverTimeAndPointInTime>
    <uhal:RevenuesFromContractsWithCustomersLeases
      contextRef="DYCurrentQuarterToDate"
      decimals="-3"
      unitRef="USD">1373925000</uhal:RevenuesFromContractsWithCustomersLeases>
    <uhal:RevenuesFromContractsWithCustomersLeases
      contextRef="DYPriorQuarterToDate"
      decimals="-3"
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    <uhal:RevenuesFromContractsWithCustomersInsurance
      contextRef="DYCurrentQuarterToDate"
      decimals="-3"
      unitRef="USD">52373000</uhal:RevenuesFromContractsWithCustomersInsurance>
    <uhal:RevenuesFromContractsWithCustomersInsurance
      contextRef="DYPriorQuarterToDate"
      decimals="-3"
      unitRef="USD">52578000</uhal:RevenuesFromContractsWithCustomersInsurance>
    <uhal:RevenuesFromContractsWithCustomersInvestments
      contextRef="DYCurrentQuarterToDate"
      decimals="-3"
      unitRef="USD">30509000</uhal:RevenuesFromContractsWithCustomersInvestments>
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      contextRef="DYPriorQuarterToDate"
      decimals="-3"
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      decimals="-3"
      unitRef="USD">1664254000</us-gaap:Revenues>
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      decimals="-3"
      unitRef="USD">230285000</uhal:RevenuesRecognizedOverTime>
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      contextRef="DYPriorSixMonthsToDate"
      decimals="-3"
      unitRef="USD">187853000</uhal:RevenuesRecognizedOverTime>
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      contextRef="DYCurrentSixMonthsToDate"
      decimals="-3"
      unitRef="USD">245321000</uhal:RevenuesRecognizedAtPointInTime>
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      contextRef="DYPriorSixMonthsToDate"
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    <uhal:RevenuesFromContractsRecognizedOverTimeAndPointInTime
      contextRef="DYPriorSixMonthsToDate"
      decimals="-3"
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      contextRef="DYCurrentSixMonthsToDate"
      decimals="-3"
      unitRef="USD">2661956000</uhal:RevenuesFromContractsWithCustomersLeases>
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      contextRef="DYPriorSixMonthsToDate"
      decimals="-3"
      unitRef="USD">2546944000</uhal:RevenuesFromContractsWithCustomersLeases>
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      contextRef="DYCurrentSixMonthsToDate"
      decimals="-3"
      unitRef="USD">99060000</uhal:RevenuesFromContractsWithCustomersInsurance>
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      decimals="-3"
      unitRef="USD">98892000</uhal:RevenuesFromContractsWithCustomersInsurance>
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      contextRef="DYCurrentSixMonthsToDate"
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      unitRef="USD">64082000</uhal:RevenuesFromContractsWithCustomersInvestments>
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      decimals="-3"
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      decimals="INF"
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    <uhal:AverageHistoricalChargebackTerm contextRef="DYCurrentSixMonthsToDate_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_CreditCardReceivablesMember">For credit card receivables, the Company uses a trailing 13 months average historical chargeback percentage of total credit card receivables to estimate a credit loss reserve. The Company rents equipment to corporate customers in which payment terms are 30 days.</uhal:AverageHistoricalChargebackTerm>
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          Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are reported at amortized cost.
          &#160;
          Modeling for the Company&#x2019;s mortgage loans is based on inputs most highly correlated to defaults, including loan-to-value, occupancy, and payment history.
          &#160;
          Historical credit loss experience provides additional support for the estimation of expected credit losses. In assessing the credit losses, the portfolio is reviewed on a collective basis, using loan-specific cash flows to determine the fair value of the collateral in the event of default.
          &#160;
        Adjustments to this analysis are made to assess loans with a loan-to-value of 65% or greater. These loans are evaluated on an individual basis and loan specific risk characteristics such as occupancy levels, expense, income growth and other relevant available information from internal and external sources relating to past events, current conditions, and reasonable and supportable forecasts.</us-gaap:FinancingReceivableCreditQualityAdditionalInformation>
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      unitRef="USD">4300000</us-gaap:PremiumsReceivableGross>
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      contextRef="FYPrior2YearEndPrior_ValuationAllowancesAndReservesTypeAxis_AllowanceForCreditLossMember"
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    <us-gaap:AllowanceForDoubtfulAccountsReceivable
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    <us-gaap:AllowanceForDoubtfulAccountsReceivable
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      decimals="-3"
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      decimals="-3"
      unitRef="USD">4228000</uhal:TransitionAdjustmentExpectedCreditLossCurrent>
    <uhal:TransitionAdjustmentExpectedCreditLossCurrent
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      decimals="-3"
      unitRef="USD">-1260000</uhal:TransitionAdjustmentExpectedCreditLossCurrent>
    <uhal:TransitionAdjustmentExpectedCreditLossCurrent
      contextRef="DYPriorSixMonthsToDate_ValuationAllowancesAndReservesTypeAxis_AllowanceForLoanAndLeaseLossesRealEstateMember"
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      contextRef="DYPriorSixMonthsToDate"
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    <us-gaap:AllowanceForDoubtfulAccountsReceivable
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    <us-gaap:AllowanceForDoubtfulAccountsReceivable
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    <us-gaap:AllowanceForDoubtfulAccountsReceivable
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    <us-gaap:AllowanceForDoubtfulAccountsReceivable contextRef="FYPriorEndYear" decimals="-3" unitRef="USD">9210000</us-gaap:AllowanceForDoubtfulAccountsReceivable>
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    <uhal:TransitionAdjustmentExpectedCreditLossCurrent
      contextRef="DYCurrentSixMonthsToDate_ValuationAllowancesAndReservesTypeAxis_AllowanceForLossesOnFinanceReceivablesMember"
      decimals="-3"
      unitRef="USD">1948000</uhal:TransitionAdjustmentExpectedCreditLossCurrent>
    <uhal:TransitionAdjustmentExpectedCreditLossCurrent
      contextRef="DYCurrentSixMonthsToDate_ValuationAllowancesAndReservesTypeAxis_AllowanceForLoanAndLeaseLossesRealEstateMember"
      decimals="-3"
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    <uhal:TransitionAdjustmentExpectedCreditLossCurrent
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    <us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs
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    <us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs
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    <us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries
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    <us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries
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    <us-gaap:CommonStockSharesAuthorized
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      decimals="2"
      unitRef="EPS">0.04</us-gaap:CommonStockDividendsPerShareDeclared>
</xbrl>
