Document And Entity Information LONG TERM PORTION OF PAYCHECK PROTECTION PROGRAM LOAN Note To Financial Statement Details Textual Note C - Inventories Note E - Leases Hedging Relationship [Domain] Note G - Stock Based Compensation Note H - Derivative Financial Instruments Note I - Fair Value Measurements Note J - Segment Information Not Designated as Hedging Instrument [Member] Note K - Revenue Note L - Stockholders' Equity Note M - Other Comprehensive Income Hedging Relationship [Axis] Income Tax Disclosure [Text Block] Note C - Inventories - Summary of Inventory Values by Product Group (Details) ASSET BASED LENDING FACILITY Note E - Leases - Lease Cost (Details) Hedging Designation [Axis] Note E - Leases - Balance Sheet Information (Details) Hedging Designation [Domain] Note E - Leases - Maturities of Operating and Finance Lease (Details) Designated as Hedging Instrument [Member] us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLoss Derivative Instruments Not Designated as Hedging Instruments, Loss Hot-rolled coil steel contracts us-gaap_LiabilitiesCurrent TOTAL CURRENT LIABILITIES Note G - Stock Based Compensation - Restricted Stock Activity (Details) Note H - Derivative Financial Instruments - Net Fair Value of Derivative Financial Instruments (Details) Note H - Derivative Financial Instruments - Gain (Loss) Recognized in Other Comprehensive Income (Details) Note H - Derivative Financial Instruments - Loss Recognized in Earnings for Derivative Instruments (Details) Note H - Derivative Financial Instruments - Change in Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) Note I - Fair Value Measurements - Recurring Fair Value Measurements (Details) Note J - Segment Information - Segment Information (Details) Note K - Revenue - Disaggregation of Revenue (Details) Note L - Stockholders' Equity - Schedule of Stockholders' Equity (Details) Note L - Stockholders' Equity - Schedule of Stockholders' Equity (Details) (Parentheticals) Note M - Other Comprehensive Income - Summary of Other Comprehensive Loss (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] Granted, weighted average grant date fair value per share (in dollars per share) Current portion of derivative liability Vested, weighted average grant date fair value per share (in dollars per share) us-gaap_HedgingLiabilitiesCurrent Hedging Liabilities, Current Cancelled or forfeited, weighted average grant date fair value per share (in dollars per share) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue Unvested, weighted average grant date fair value per share (in dollars per share) Unvested, weighted average grant date fair value per share (in dollars per share) Contribution to retirement plan us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod Cancelled or forfeited (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber Unvested (in shares) Unvested (in shares) Schedule of Derivative Instruments [Table Text Block] Other comprehensive loss, net of income, before reclassification Total loss reclassified from AOCI (1) Granted (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod Vested (in shares) Nonvested Restricted Stock Shares Activity [Table Text Block] Other comprehensive loss: Other comprehensive loss Commodity Contract [Member] Current portion of Paycheck Protection Program loan Accounts payable and accrued expenses us-gaap_DerivativeNonmonetaryNotionalAmountMass Derivative, Nonmonetary Notional Amount, Mass (US Ton) Employee compensation and related expenses Income taxes payable Lessee, Operating Leases [Text Block] Dividends payable Revolving Credit Facility [Member] Credit Facility [Axis] Credit Facility [Domain] us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) Property, Plant and Equipment, Net [Member] Primary financial statement caption encompassing property, plant and equipment, net. us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchase of property, plant and equipment Current Portion of Financing Lease [Member] Primary financial statement caption encompassing current portion of financing lease. Accrued Expense and Other Noncurrent Liabilities [Member] Primary financial statement caption encompassing accrued expense and other noncurrent liabilities. us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) Weighted average number of common shares outstanding: CURRENT LIABILITIES: Segment assets TOTAL ASSETS Plan Name [Axis] Plan Name [Domain] PROPERTY, PLANT AND EQUIPMENT: us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) Deferred income tax asset Share-based Payment Arrangement [Text Block] Award Type [Domain] Award Type [Axis] Net earnings (loss) NET EARNINGS (LOSS) Net earnings (loss) Restricted Stock [Member] Schedule of Balance Sheet Information Related to Operating Leases [Table Text Block] Tabular disclosure of balance sheet information related to operating leases. frd_OperatingLeaseMonthlyPayments Operating Lease, Monthly Payments Amount of monthly payments related to operating lease. us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment Less accumulated depreciation us-gaap_PropertyPlantAndEquipmentNet Property, plant, and equipment, net Machinery and equipment Customer Owned [Member] Information pertaining to customer owned coil. Secondary Coil [Member] Information pertaining to secondary coil. Construction in process Construction in Progress, Gross Prime Coil [Member] Information pertaining to prime coil. Pipe Finishing Services [Member] Information pertaining to pipe finishing services. Land Mill Reject Pipe [Member] Information pertaining to mill reject pipe. Buildings and yard improvements Manufactured Pipe [Member] Information pertaining to manufactured pipe. Change in postretirement benefits Derivative asset Derivative Instrument [Axis] Derivative Contract [Domain] INVESTING ACTIVITIES Hot-rolled Coil Future Contracts [Member] Represents hot-rolled coil future contracts. Net earnings (loss) per share: us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable Income taxes payable us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities Accounts payable and accrued expenses us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities Employee compensation and related expenses us-gaap_IncomeTaxExpenseBenefit Income Tax Expense (Benefit), Total Income tax us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet Loss recognized on open derivatives not designated for hedge accounting us-gaap_GainLossOnOilAndGasHedgingActivity Deferred realized loss on derivatives General corporate expenses Cash frd_FinanceLeaseMonthlyPayment Finance Lease, Monthly Payment Represents the amount of monthly payment for finance lease. us-gaap_AllocatedShareBasedCompensationExpense Share-based Payment Arrangement, Expense us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent Cash flow hedges, tax benefit Heavy-duty Forklift [Member] Information pertaining to the heavy-duty forklift. frd_OperatingAndFinanceLeaseRightofuseAsset Total right-of-use assets Amount of lessee's right to use underlying asset under operating and finance lease. Amendment Flag us-gaap_ComprehensiveIncomeNetOfTax Comprehensive income (loss) City Area Code frd_OperatingAndFinanceLeaseLiability Total lease liabilities Present value of lessee's discounted obligation for lease payments from operating and finance lease. Operating and Finance Lease, Liability, Maturity [Table Text Block] Tabular disclosure of undiscounted cash flows of operating and finance lease liability. us-gaap_IncreaseDecreaseInOtherOperatingAssets Other current assets Current Fiscal Year End Date us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate Increase (decrease) in operating liabilities: Lease, Cost, Total us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent Operating Lease, Weighted Average Discount Rate, Percent Document Fiscal Period Focus Operating lease expense Document Fiscal Year Focus Lease, Cost [Table Text Block] Document Period End Date us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1 Operating Lease, Weighted Average Remaining Lease Term (Year) Entity File Number Entity Emerging Growth Company Document Type us-gaap_GainsLossesOnExtinguishmentOfDebt Gain (Loss) on Extinguishment of Debt, Total Forgiveness of Paycheck Protection Program Loan Entity Small Business Entity Shell Company us-gaap_DividendsCommonStockCash Cash dividends ($0.02 per share) Document Information [Line Items] Document Information [Table] us-gaap_AreaOfRealEstateProperty Area of Real Estate Property (Square Foot) Entity Filer Category Debt Instrument [Axis] Entity Current Reporting Status Debt Instrument, Name [Domain] London Interbank Offered Rate (LIBOR) [Member] Variable Rate [Domain] us-gaap_IncreaseDecreaseInIncomeTaxesReceivable Federal income taxes recoverable Variable Rate [Axis] us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivable Statement of Comprehensive Income [Abstract] Entity Tax Identification Number Entity Central Index Key Entity Registrant Name Paid in capital – restricted stock awards Entity [Domain] Legal Entity [Axis] Entity Address, Address Line One Entity Address, City or Town Entity Address, Postal Zip Code Entity Address, State or Province us-gaap_TreasuryStockValue Treasury stock at cost (1,435,248 shares at June 30, and March 31, 2021) Entity Common Stock, Shares Outstanding Paycheck Protection Program CARES Act [Member] Represents loan designed to provide funds for small businesses to keep their employees on the payroll. ABL Facility [Member] Represents the asset-based revolving loans facility. frd_DebtInstrumentCovenantFixedChargeCoverageRatio Debt Instrument, Covenant, Fixed Charge Coverage Ratio Requirement for fixed charge coverage ratio under the debt agreement. frd_LineOfCreditFacilityMaximumBorrowingCapacityMaximumConditionalIncrease Line of Credit Facility, Maximum Borrowing Capacity, Maximum Conditional Increase The maximum amount of increase to the maximum borrowing capacity of the line of credit facility upon the satisfaction of certain conditions. frd_LineOfCreditFacilityMaximumBorrowingCapacityConditionalIncreaseMinimumIncrements Line of Credit Facility, Maximum Borrowing Capacity, Conditional Increase, Minimum Increments The minimum amount per increment of increases to the maximum borrowing capacity of the line of credit facility upon the satisfaction of certain conditions. us-gaap_IncreaseDecreaseInInventories Inventories Trading Symbol Facility in Sinton, Texas [Member] Represents the facility in Sinton, Texas. frd_DebtInstrumentCovenantBorrowingLimitAsPercentOfAccountsReceivable Debt Instrument, Covenant, Borrowing Limit as Percent of Accounts Receivable Requirement for borrowing limit presented as a percent of accounts receivable under the debt agreement. frd_DebtInstrumentCovenantBorrowingLimitFactorMultipliedByTheNetOrderlyLiquidatingValueOfInventoryPercentage Debt Instrument, Covenant, Borrowing Limit, Factor Multiplied by the Net Orderly Liquidating Value of Inventory, Percentage The factor to be multiplied by the net orderly liquidating value percentage identified in the most recent appraisal to calculate the borrowing limit under the debt agreement. frd_DebtInstrumentCovenantBorrowingLimitFactorMultipliedByTheNetOrderlyLiquidatingValueOfEquipmentPercentage Debt Instrument, Covenant, Borrowing Limit, Factor Multiplied by the Net Orderly Liquidating Value of Equipment, Percentage The factor to be multiplied by the net orderly liquidating value of eligible equipment used to calculate the borrowing limit under the debt instrument. frd_DebtInstrumentCovenantBorrowingLimitMachineryAndEquipmentComponentLimit Debt Instrument, Covenant, Borrowing Limit, Machinery and Equipment Component Limit The machinery and equipment limit used to calculate the borrowing limit under the debt instrument. Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd Line of Credit Facility, Interest Rate at Period End Local Phone Number us-gaap_TableTextBlock Notes Tables us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity Issuance of restricted stock frd_CapitalExpendituresExpectedCost Capital Expenditures, Expected Cost The amount of expected cost of the capital expenditure. us-gaap_AreaOfLand Area of Land (Acre) Selling, general and administrative Line of Credit Facility, Lender [Domain] Raw materials Lender Name [Axis] us-gaap_LiabilitiesAndStockholdersEquity TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Finished Goods Decrease (increase) in operating assets: Retained earnings us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred Accumulated other comprehensive loss Debt Disclosure [Text Block] Derivative Instruments, Gain (Loss) [Table Text Block] Interest expense us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Derivative Instruments and Hedging Activities Disclosure [Text Block] Inventory Disclosure [Text Block] Operating lease liability, non-current Schedule of Inventory, Current [Table Text Block] Present value of lease liability, operating lease us-gaap_OperatingLeaseLiability Operating lease liability, current Current portion of financing lease Finance lease liability, current Finance lease liability, non-current Operating lease right-of-use asset us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Operating lease, Total undiscounted lease payments us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Operating lease, Less: imputed interest Present value of lease liability, finance lease us-gaap_FinanceLeaseLiability us-gaap_FinanceLeasePrincipalPayments Cash paid for principal portion of finance lease Deferred Deferred taxes Operating lease, Fiscal 2025 Operating lease, Fiscal 2026 Finance lease right-of-use asset Hot-rolled Coil Steel Contracts [Member] Represents information related to hot-rolled coil steel contracts. Operating lease, Fiscal 2023 Operating lease, Fiscal 2024 Cash value of officers’ life insurance and other assets Aggregate carrying amount, as of the balance sheet date, of the cash value of officers' life insurance policies and noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). Allowances for bad debts and cash discounts For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible and for discounts provided for cash payments. Current Portion of Derivative Liability [Member] Represents current portion of derivative liability. Open Hedges Subject To Fair Value Changes [Member] Represents information related to open hedges subject to fair value changes. frd_IncreaseDecreaseInDeferredCompensationCashBasedArrangementsliability Contribution to retirement plan The increase (decrease) of the liability related to deferred compensation arrangements during the period. Non-standard Coil Inventory [Member] Represents inventory designated for the Non-Standard Coil segment of the reporting entity. Prime Coil Inventory [Member] Represents inventory designated for the Prime Coil segment of the reporting entity. Compensation expense for restricted stock Tubular Inventory [Member] Represents inventory designated for the Tubular segment of the reporting entity. Operating lease,Fiscal 2022 (remainder of fiscal year) JPMorgan Chase Bank N.A. [Member] The name of a lender of a credit facility. Tubular [Member] Represents the Tubular segment of the reporting entity's business. Coil [Member] Represents the Coil segment of the reporting entity's business. us-gaap_LesseeOperatingLeaseTermOfContract Lessee, Operating Lease, Term of Contract (Year) us-gaap_Depreciation Depreciation us-gaap_LiabilitiesFairValueDisclosure Total us-gaap_AssetsCurrent TOTAL CURRENT ASSETS Stockholders' Equity Note Disclosure [Text Block] us-gaap_LesseeFinanceLeaseTermOfContract1 Lessee, Finance Lease, Term of Contract (Year) Treasury stock, shares (in shares) Common stock, par value $1: Authorized shares — 10,000,000; Issued shares — 8,334,785 shares at June 30, and March 31, 2021 Measurement Frequency [Axis] Adjustments to reconcile net earnings (loss) to cash provided by (used in) operating activities: Measurement Frequency [Domain] Fair Value, Recurring [Member] Common stock, shares authorized (in shares) Common stock, shares issued (in shares) Common stock, par value (in dollars per share) Product and Service [Axis] Other current assets Product and Service [Domain] us-gaap_InterestPaidNet Interest Paid, Excluding Capitalized Interest, Operating Activities Cash Flow, Supplemental Disclosures [Text Block] us-gaap_IncomeTaxesPaid Income Taxes Paid Property, Plant and Equipment Disclosure [Text Block] Inventories Inventories Net Sales Revenue from Contract with Customer, Including Assessed Tax Fair Value, Inputs, Level 3 [Member] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value Hierarchy and NAV [Axis] OPERATING ACTIVITIES Schedule of Segment Reporting Information, by Segment [Table Text Block] Statement [Line Items] Accounts receivable, net of allowances for bad debts and cash discounts of $32,834 at June 30, and March 31, 2021 us-gaap_NumberOfReportableSegments Number of Reportable Segments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Additional paid-in capital AOCI Attributable to Parent [Member] STOCKHOLDERS’ EQUITY: Long-Lived Tangible Asset [Axis] Other income, net Other income, net Long-Lived Tangible Asset [Domain] Segment Reporting Disclosure [Text Block] Closed Hedges with Hedged Transaction Still Expected to Occur [Member] Represents closed hedges with hedged transaction still expected to occur. CURRENT ASSETS: Fair Value Disclosures [Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations CASH AND RESTRICTED CASH AT BEGINNING OF PERIOD CASH AND RESTRICTED CASH AT END OF PERIOD us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect INCREASE (DECREASE) IN CASH AND RESTRICED CASH OTHER ASSETS: us-gaap_Liabilities TOTAL LIABILITIES us-gaap_NetCashProvidedByUsedInFinancingActivities NET CASH PROVIDED BY FINANCING ACTIVITIES COMMITMENTS AND CONTINGENCIES us-gaap_OperatingIncomeLoss EARNINGS (LOSS) FROM OPERATIONS Operating profit (loss) us-gaap_NetCashProvidedByUsedInOperatingActivities NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES us-gaap_NetCashProvidedByUsedInInvestingActivities NET CASH USED IN INVESTING ACTIVITIES Costs of products sold Consolidation Items [Domain] Lower of cost or net realizable value inventory adjustment Derivative liabilities Commodity futures – financial liabilities, net Consolidation Items [Axis] us-gaap_PaymentsOfDividendsCommonStock Cash dividends paid us-gaap_CostsAndExpenses Costs and expenses, total Costs and expenses: Retained Earnings [Member] Treasury Stock [Member] 2016 Restricted Stock Plan [Member] Represents the plan that is is administered by the Compensation Committee (the "Committee") of the Board of Directors (the "Board") and continues indefinitely until terminated by the Board or until all shares allowed by the Plan have been awarded and earned. Additional Paid-in Capital [Member] Common Stock [Member] Equity Components [Axis] Equity Component [Domain] Accounts Payable and Accrued Liabilities [Member] Current Other Noncurrent Assets [Member] Provision for (benefit from) income taxes: Other Noncurrent Liabilities [Member] us-gaap_ReclassificationFromAociCurrentPeriodTax Reclassification from AOCI, Current Period, Tax, Total Other Current Assets [Member] us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest EARNINGS (LOSS) BEFORE INCOME TAXES Total earnings (loss) before income taxes Comprehensive Income (Loss) Note [Text Block] us-gaap_LineOfCredit Long-term Line of Credit, Total Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Disaggregation of Revenue [Table Text Block] Revenue from Contract with Customer [Text Block] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Document Quarterly Report Entity Incorporation, State or Country Code Accounting Policies [Abstract] Document Transition Report Entity Interactive Data Current Cash dividends, per share (in dollars per share) Nonoperating Income (Expense) [Member] Security Exchange Name Title of 12(b) Security Cost of Sales [Member] Asset based lending facility proceeds, net Sales [Member] Income Statement Location [Axis] Income Statement Location [Domain] Paycheck Protection Program loan proceeds Segments [Axis] Segments [Domain] frd_AccumulatedDepreciationDepletionAndAmortizationWritedOff Accumulated Depreciation, Depletion and Amortization, Wrote-off Amount of decrease in accumulated depreciation, depletion and amortization as a result of wrote-off fully depreciated fixed assets. Diluted (in shares) Statement [Table] Statement of Financial Position [Abstract] Diluted (in dollars per share) us-gaap_EarningsPerShareDiluted Basic (in shares) us-gaap_EffectiveIncomeTaxRateContinuingOperations Effective Income Tax Rate Reconciliation, Percent, Total us-gaap_EarningsPerShareBasic Basic (in dollars per share) Statement of Cash Flows [Abstract] Lease Contractual Term [Domain] us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent Other comprehensive loss, before tax Lease Contractual Term [Axis] us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1 Other comprehensive loss, tax benefit Income Statement [Abstract] Other comprehensive loss, net of tax us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total Finance lease – interest on lease liability Cash flow hedges, before tax us-gaap_FinanceLeaseLiabilityPaymentsDue Finance Lease, Liability, Payment, Due, Total Finance lease, Total undiscounted lease payments us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax Gain recognized in OCI Gain (loss) from reclassified from AOCI us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax Finance lease – amortization of ROU asset us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount Finance lease, Less: imputed interest Finance lease, Fiscal 2023 Finance lease, Fiscal 2024 Finance lease, Fiscal 2025 Finance lease, Fiscal 2026 us-gaap_DerivativeCollateralRightToReclaimCash Derivative, Collateral, Right to Reclaim Cash Cash Margin Accounting Standards Update and Change in Accounting Principle [Text Block] us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent Finance Lease, Weighted Average Discount Rate, Percent Finance lease, Fiscal 2022 (remainder of fiscal year) us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1 Finance Lease, Weighted Average Remaining Lease Term (Year) Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] FINANCING ACTIVITIES OTHER NON-CURRENT LIABILITIES us-gaap_PaymentsToAcquireLifeInsurancePolicies Increase in cash surrender value of officers’ life insurance Corporate, Non-Segment [Member] POSTRETIREMENT BENEFITS OTHER THAN PENSIONS us-gaap_StockholdersEquity TOTAL STOCKHOLDERS’ EQUITY Balance at March 31, 2021 Balance at June 30, 2021 Position [Domain] Long [Member] Class of Stock [Axis] Short [Member] Schedule of Stockholders Equity [Table Text Block] Comprehensive Income (Loss) [Table Text Block] Position [Axis] Cash flow hedges, net of tax Cash flow hedges, net of tax Operating Segments [Member] Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]