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Disclosure - Fair Value Measurements (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - Investments (Available-for-sale investments) (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - Investments (Adjusted cost and estimated market value of available-for-sale investments) (Details) link:presentationLink link:calculationLink link:definitionLink 40902 - Disclosure - Borrowings (Annual maturities of Notes, Loans and Leases Payable) (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Borrowings (Long-term debt borrowings) (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - Interest on Borrowings (Components of interest expense) (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - Interest on Borrowings (Interest Rates and Company Borrowings) (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - Derivatives (Interest rate contracts designated as hedging instruments) (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - Derivatives (Effect of interest rate contracts on statement of operations) (Details) link:presentationLink link:calculationLink link:definitionLink 42001 - Disclosure - Related Party Transactions (Related Party Revenue) (Details) link:presentationLink link:calculationLink link:definitionLink 42002 - Disclosure - Related Party Transactions (Related Party Costs and Expenses) (Details) link:presentationLink link:calculationLink link:definitionLink 42003 - Disclosure - Related Party Transactions (Related Party Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 42300 - Disclosure - Consolidating financial information by industry segment (Balance Sheets) (Details) link:presentationLink link:calculationLink link:definitionLink 42301 - Disclosure - Consolidating financial information by industry segment (Statement of Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 42302 - Disclosure - Consolidating financial information by industry segment (Cash Flow Statements) (Details) link:presentationLink link:calculationLink link:definitionLink 42200 - Disclosure - Financial Information by Geographic Area (Details) link:presentationLink link:calculationLink link:definitionLink 41503 - Disclosure - Employee Benefit Plans (Components of net periodic post retirement benefit cost) (Details) link:presentationLink link:calculationLink link:definitionLink 41602 - Disclosure - Fair Value Measurements (Financial Instruments Level within the Fair Value Hierarchy) (Details) link:presentationLink link:calculationLink link:definitionLink 40400 - Disclosure - Earnings Per Share (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 40600 - Disclosure - Investments (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 40900 - Disclosure - Borrowings (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 41000 - Disclosure - Interest on Borrowings (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 41100 - Disclosure - Derivatives (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 42000 - Disclosure - Related Party Transactions (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 00026 - Statement - Consolidated Statements of Changes in Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 00027 - Statement - Consolidated Statement of Changes in Stockholders' Equity Parenthetical link:presentationLink link:calculationLink link:definitionLink 10300 - Disclosure - Accounting Policies link:presentationLink link:calculationLink link:definitionLink 10500 - Disclosure - Reinsurance Recoverables and Trade Receivables, Net link:presentationLink link:calculationLink link:definitionLink 10700 - Disclosure - Other Assets link:presentationLink link:calculationLink link:definitionLink 10800 - Disclosure - Net Investment and Interest Income link:presentationLink link:calculationLink link:definitionLink 11000 - Disclosure - Interest on Borrowings link:presentationLink link:calculationLink link:definitionLink 11400 - Disclosure - Provision for Taxes link:presentationLink link:calculationLink link:definitionLink 11700 - Disclosure - Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable link:presentationLink link:calculationLink link:definitionLink 12100 - Disclosure - Statutory Financial Information of Insurance Subsidiaries link:presentationLink link:calculationLink link:definitionLink 12600 - Disclosure - Schedule I - Condensed Financial Information of Amerco link:presentationLink link:calculationLink link:definitionLink 12700 - Disclosure - Notes to Condensed Financial Information for Amerco Only link:presentationLink link:calculationLink link:definitionLink 12800 - Disclosure - Schedule II - Amerco and Consolidated Subsidiaries Valuation and Qualifying Accounts link:presentationLink link:calculationLink link:definitionLink 12900 - Disclosure - Schedule V - Supplemental Information (for Property-Casualty Insurance Operations) link:presentationLink link:calculationLink link:definitionLink 30300 - Disclosure - Accounting Policies (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 30500 - Disclosure - Reinsurance Recoverables and Trade Receivables, Net (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 30700 - Disclosure - Other Assets (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 30800 - Disclosure - Net Investment and Interest Income (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 31400 - Disclosure - Provision for Taxes (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 31500 - Disclosure - Employee Benefit Plans (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 31700 - Disclosure - Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 32100 - Disclosure - Statutory Financial Information of Insurance Subsidiaries (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - Accounting Policies (Inventories, net) (Details) link:presentationLink link:calculationLink link:definitionLink 20100 - Disclosure - Accounting Policies (Policy Text Block) link:presentationLink link:calculationLink link:definitionLink 40500 - Disclosure - Reinsurance Recoverables and Trade Receivables, Net (Details) link:presentationLink link:calculationLink link:definitionLink 40604 - Disclosure - Investments (Carrying value of other investments) (Details) link:presentationLink link:calculationLink link:definitionLink 40700 - Disclosure - Other Assets (Details) link:presentationLink link:calculationLink link:definitionLink 40800 - Disclosure - Net Investment and Interest Income (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - Provision for Taxes (Earnings before taxes and provision for taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 41402 - Disclosure - Provision for Taxes (Effective income tax rate reconciliation) (Details) link:presentationLink link:calculationLink link:definitionLink 41403 - Disclosure - Provision for Taxes (Significant components of deferred tax assets and liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 41404 - Disclosure - Provision for Taxes (Reconciliation of total amounts of unrecognized tax benefits roll forward) (Details) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - Employee Benefit Plans (Summary of Financing Arrangements for Leveraged ESOP Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 41502 - Disclosure - Employee Benefit Plans (Shares Held by the ESOP Plan) (Details) link:presentationLink link:calculationLink link:definitionLink 41504 - Disclosure - Employee Benefit Plans (Components of Postretirement Benefit Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 41505 - Disclosure - Employee Benefit Plans (Discount Rate Assumptions in Computation of Accumulated Postretirement Benefit Obligation) (Details) link:presentationLink link:calculationLink link:definitionLink 41506 - Disclosure - Employee Benefit Plans (Future Net Benefit Payments Expected for Post Employee Benefit Obligations) (Details) link:presentationLink link:calculationLink link:definitionLink 41701 - Disclosure - Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Insurance Subsidiaries Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 41702 - Disclosure - Reinsurance and Policy Benefits and Losses Claims and Loss Expenses Payable (Policy Benefits and Losses, Claims and Loss Expenses Payable for Property and Casualty Insurance) (Details) link:presentationLink link:calculationLink link:definitionLink 41703 - Disclosure - Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Activity in the Liability for Unpaid Losses and Loss Adjustment Expenses for Property and Casualty Insurance) (Details) link:presentationLink link:calculationLink link:definitionLink 42101 - Disclosure - Statutory Financial Information of Insurance Subsidiaries (Net income (loss) Capital and Surplus (Details) link:presentationLink link:calculationLink link:definitionLink 42601 - Disclosure - Schedule I - Condensed Financial Information of AMERCO (Balance Sheets) (Details) link:presentationLink link:calculationLink link:definitionLink 42602 - Disclosure - Schedule I - Condensed Financial Information of AMERCO (Statements of Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 42604 - Disclosure - Schedule I - Condensed Financial Information of AMERCO (Statements of Cash Flow) (Details) link:presentationLink link:calculationLink link:definitionLink 42700 - Disclosure - Schedule II - AMERCO and Consolidated Subsidiaries, Valuation and Qualifying Accounts (Details) link:presentationLink link:calculationLink link:definitionLink 42800 - Disclosure - Schedule V - AMERCO and Consolidated Subsidiaries, Supplemental Information (for Property-Casualty Insurance Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 40300 - 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Disclosure - Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 40200 - Disclosure - Principles of Consolidation (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 41300 - Disclosure - Stockholders' Equity (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 11300 - Disclosure - Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 31300 - Disclosure - Stockholders' Equity (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 12500 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 42500 - Disclosure - Subsequent Events (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 41704 - Disclosure - Reinsurance and Policy Benefits and Losses, Claims, and Loss Expenses Payable (Incurred Claims Development) (Details) link:presentationLink link:calculationLink link:definitionLink 41705 - Disclosure - Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Cumulative Paid Claims And Allocated Claim Adjustment Expense Net Of Reinsurance) (Details) link:presentationLink link:calculationLink link:definitionLink 41706 - Disclosure - Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Total Gross Liability For Unpaid Property And Casualty Claims And Claim Adjustment Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 41707 - Disclosure - Reinsurance And Policy Benefits And Losses Claims And Loss Expenses Payable (Average Annual Percentage Payout Of Incurred Claims By Age Net Of Reinsurance) (Details) link:presentationLink link:calculationLink link:definitionLink 41900 - Disclosure - Contingencies (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink 40603 - Disclosure - Investments (Available for sale equity investments) (Details) link:presentationLink link:calculationLink link:definitionLink 12400 - 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Disclosure - Leases (Weighted Average Discount Rate) (Details) link:presentationLink link:calculationLink link:definitionLink 41803 - Disclosure - Leases (Components Of Lease Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 41804 - Disclosure - Leases (Maturities Of Lease Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 41200 - Disclosure - Accumulated Other Comprehensive Income Loss (Details) link:presentationLink link:calculationLink link:definitionLink 42401 - Disclosure - Revenue Recognition (Revenue Over Time) (Details) link:presentationLink link:calculationLink link:definitionLink 11200 - Disclosure - Accumulated Other Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 31200 - Disclosure - Accumulated Other Comprehensive Income (Table Text Block) link:presentationLink link:calculationLink link:definitionLink 41805 - Disclosure - Leases (Lease Commitments For Lease Terms Of More Than One Year (Details) link:presentationLink link:calculationLink link:definitionLink 41600 - Disclosure - Fair Value Measurements (Narratives) (Details) link:presentationLink link:calculationLink link:definitionLink