Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] 3.500% Medium-Term Notes, Series A Due June 27, 2031 3.500% Medium-Term Notes, Series A Due June 27, 2031 [Member] 3.500% Medium-Term Notes, Series A Due June 27, 2031 Short-Term Debt, Type Short-Term Debt, Type [Axis] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Counterparty netting adjustment Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Weighted average contractual interest rate (percentage) Debt, Weighted Average Interest Rate Summary of Nonrecurring Fair Value Measurements Recognized for Assets Fair Value Measurements, Nonrecurring [Table Text Block] Adjustment to Compensation, Amount Adjustment to Compensation Amount Segment Reporting [Abstract] Segment Reporting [Abstract] Summary of Investment in Operating Leases Net Investment In Lease [Table Text Block] Net Investment In Lease [Table Text Block] Common stock, $100 par value. Authorized 15,000,000 shares; issued and outstanding 13,660,000 shares as of June 30, 2026 and March 31, 2026 Common Stock, Value, Issued Restatement Determination Date Restatement Determination Date Counterparty netting adjustment Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Derivative Instrument Derivative Instrument [Axis] Securitizations and Variable Interest Entities (VIE) Securitization And Variable Interest Entities Disclosure [Text Block] The entire disclosure for the Company's securitizations and variable interest entities. Finance Receivables Financing Receivables [Text Block] Paydown of related party debt Repayments of Related Party Debt Commitments And Contingencies Disclosure [Table] Commitments And Contingencies Disclosure [Table] Commitments and contingencies disclosure. Amendment Flag Amendment Flag Early termination loss on operating leases Gain (Loss) on Termination of Lease Consolidated Entities Consolidated Entities [Axis] Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Financial Instrument Performance Status Financial Instrument Performance Status [Domain] Benefit plan expenses Related Party Benefit Plan Expense Related party benefit plan expense is derived from the Company's participation in various employee benefit plans that are maintained by AHM and HCI. The allocated benefit plan expenses are included in general and administrative expenses. Leases [Abstract] Leases [Abstract] Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Operating lease vehicles Property, Plant, and Equipment, Lessor Asset under Operating Lease, before Accumulated Depreciation Transactions Involving Related Parties Related Party Transactions Disclosure [Text Block] Consolidated Entities Consolidated Entities [Domain] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Prior Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Entity Address, State or Province Entity Address, State or Province Medium term note programs, carrying value Medium-Term Note PEO Total Compensation Amount PEO Total Compensation Amount Prior Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Maximum balance outstanding at any month-end Line of Credit Facility, Maximum Month-end Outstanding Amount 3.650% Medium-Term Notes, Series A Due April 23, 2031 3.650% Medium-Term Notes, Series A Due April 23, 2031 [Member] 3.650% Medium-Term Notes, Series A Due April 23, 2031 Notional balances Derivative, Notional Amount Secured debt Secured Debt Secured debt, carrying value Secured Debt Summary of Income Statement and Balance Sheet Impact of Transactions with Parent and Affiliated Companies Schedule of Related Party Transactions [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Number of reportable segments Number of Reportable Segments Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Securitized assets Securitized Assets Securitized Assets Short-Term Debt, Type Short-Term Debt, Type [Domain] Entity Address, City or Town Entity Address, City or Town Interest expense: Interest Expense, Debt [Abstract] Depreciation expense Depreciation, Lessor Asset under Operating Lease Class of Financing Receivable Class of Financing Receivable [Domain] Income taxes payable Taxes Payable Receivables [Abstract] Receivables [Abstract] Commercial paper, carrying value Commercial Paper Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] 2027 2026 Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount 3.300% Medium-Term Notes, Series A Due March 21, 2029 3.300% Medium-Term Notes, Series A Due March 21, 2029 [Member] 3.300% Medium-Term Notes, Series A Due March 21, 2029 Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Credit grade B Credit Grade B [Member] Credit Grade B [Member] Finance receivables, net: Financing Receivable, after Allowance for Credit Loss [Abstract] Maximum funds available (up to) Line of Credit Facility, Maximum Borrowing Capacity Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] 90 days or greater past due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Unearned subsidy income Leases Unearned Subsidy Income Subsidy payments received from the Parent companies, which supplement the revenues on financing products offered under incentive programs. Subsidy payments received on leases are deferred and recognized as revenue over the term of the related contracts. The unearned balance is recognized as reductions to the carrying value of investment in operating leases. Current Period Current Year [Abstract] Current Year Collateral posted/held Derivative Liability, Collateral Posted Derivative Liability, Collateral Posted Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Finance receivables, net of allowance for credit losses of $450 and $436 Finance receivables, net Financing receivables Finance receivables, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Early termination loss on operating leases Gain (Loss) on Contract Termination Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] 2031 Lessor, Operating Lease, Payment to be Received, Rolling Year Five Floating Rate Medium-Term Notes, Series A Due May 28, 2027 Floating Rate Medium-Term Notes, Series A Due May 28, 2027 [Member] Floating Rate Medium-Term Notes, Series A Due May 28, 2027 Summary of Financial Information by Segment Segment Reporting [Table Text Block] Noncontrolling interest Noncontrolling Interest [Member] Related Party Related and Nonrelated Parties [Axis] Due to/from Parent and affiliated companies Increase (Decrease) Due from Affiliates Proceeds from issuance of related party debt Proceeds from Related Party Debt Accumulated depreciation Property, Plant, and Equipment, Lessor Asset under Operating Lease, Accumulated Depreciation Summary of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Finance receivables, allowance for credit losses Allowance for credit losses Beginning balance Ending balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 2025 2024 Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Security Exchange Name Security Exchange Name Debt instrument, term Debt Instrument, Term Vehicles held for disposition Long-Lived Asset, Held-for-Sale, Fair Value Disclosure Investment in Operating Leases Lessor, Operating Leases [Text Block] Total liabilities Liabilities, Fair Value Disclosure Credit grade D Credit Grade D [Member] Credit Grade D [Member] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items Consolidation Items [Domain] Prior Period, Gross charge-offs Prior Period, Gross Write-Off [Abstract] Prior Period, Gross Write-Off Syndicated Bank Credit Facilities With Five Year Revolving Term Syndicated Bank Credit Facilities With Five Year Revolving Term [Member] Syndicated bank credit facilities with five year revolving term. Segment Reporting Segment Reporting, Policy [Policy Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] General and administrative expenses: General and Administrative Expense [Abstract] Total liabilities Liabilities Trading Symbol Trading Symbol Total loss recognized Changes Measurement [Member] Related party debt Interest Expense, Borrowings Summary of Other Liabilities Other Liabilities [Table Text Block] Syndicated Bank Credit Facilities With 364 Day Credit Agreement Syndicated Bank Credit Facilities With Three Hundreds Sixty Four Day Credit Agreement [Member] Syndicated bank credit facilities with three hundreds sixty four day credit agreement [Member]. Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Finance receivables acquired Payments to Acquire Finance Receivables Nonrelated Party and Affiliated Entity Nonrelated Party And Affiliated Entity [Member] Nonrelated Party And Affiliated Entity Financial Instrument Performance Status Financial Instrument Performance Status [Axis] 2027 2026 Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Commercial loans Commercial Loans [Member] Commercial loans. Credit Facility Credit Facility [Domain] Unused balance of commercial revolving lines of credit Loans And Leases Receivable Commitments Unused Portion Of Lines Of Credit Unused portion of commercial lending committed to dealers, in the form of lines of credit. Related Party Transactions [Abstract] Related Party Transactions [Abstract] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Prior Year Prior Year [Abstract] Prior Year Entity Emerging Growth Company Entity Emerging Growth Company 5.600% Medium-Term Notes, Series A Due September 6, 2030 5.600% Medium-Term Notes, Series A Due September 6, 2030 [Member] 5.600% Medium-Term Notes, Series A Due September 6, 2030 Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Finance receivables Total Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Underlying Security Market Price Change Underlying Security Market Price Change, Percent Commercial paper Commercial Paper [Member] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Dividend payable Dividends Payable Entities [Table] Entities [Table] Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Operating Lease, Liability, Statement of Financial Position [Extensible List] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Short-term debt Short-Term Debt Derivative instruments Gross derivative liabilities Derivative Liability, Subject to Master Netting Arrangement, before Offset Accrued interest and fees on finance receivables Financing Receivable, Accrued Interest And Fees, After Allowance For Credit Loss Financing Receivable, Accrued Interest And Fees, After Allowance For Credit Loss Due from Parent and affiliated companies Other Receivables Accrued lease payments and fees on operating leases Operating Lease, Accrued Lease Payments And Fees Operating Lease, Accrued Lease Payments And Fees Proceeds from issuance of commercial paper Proceeds from Issuance of Commercial Paper Derivative instruments: Derivative Instrument Detail [Abstract] Award Timing Predetermined Award Timing Predetermined [Flag] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Rolling Year Five Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Other Other miscellaneous assets Other Assets, Miscellaneous Effective income tax rate (percentage) Effective Income Tax Rate Reconciliation, Percent 2030 Lessor, Operating Lease, Payment to be Received, Rolling Year Four Leased Vehicles Leased Vehicles [Member] Leased Vehicles Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] AHM American Honda Motor Corporation Inc [Member] American Honda Motor Corporation Inc. Total undiscounted future lease obligations Lessee, Operating Lease, Liability, to be Paid Restricted Cash and Cash Equivalent, Statement of Financial Position [Extensible Enumeration] Restricted Cash and Cash Equivalent, Statement of Financial Position [Extensible Enumeration] Lessor, Lease, Description [Table] Lessor, Lease, Description [Table] 2025 2024 Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Collateral Held Collateral Held [Domain] All Executive Categories All Executive Categories [Member] Class of Financing Receivable Class of Financing Receivable [Axis] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other Liabilities Other Liabilities Disclosure [Text Block] Syndicated Bank Credit Facilities With One Year Revolving Term Syndicated Bank Credit Facilities With One Year Revolving Term [Member] Syndicated bank credit facilities with one year revolving term. 0.750% Medium-Term Notes, Series A Due November 25, 2026 0.750% Medium-Term Notes, Series A Due November 25, 2026 [Member] 0.750% Medium-Term Notes, Series A Due November 25, 2026 Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Reconciliation of cash and cash equivalents and restricted cash: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name Debt Instrument, Name [Domain] Segment and Geographic Information Segment Reporting [Text Block] Line of credit facility outstanding amount Long-Term Line of Credit 2027 Lessor, Operating Lease, Payment to be Received, Next Rolling 12 Months Dividends paid Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Unrecognized deferred tax liability from undistributed foreign earnings Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries Shared services Related Party Shared Services Fee Related party shared services fees are derived from the Company's sharing of certain common expenditures with the Parent companies and others, including data processing services, software development, and facilities. The allocated costs for shared services are included in general and administrative expenses. Investment in operating leases, net: Investment In Operating Leases Net [Abstract] Investment in operating leases net. Leased vehicle expenses Leased vehicle expenses Operating Lease, Cost, Leased Vehicle Expense Includes depreciation expense, initial direct costs, and other lessor costs, and gain on disposition of leased vehicles Liabilities Liabilities [Abstract] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Restricted cash included in other assets Restricted cash Restricted Cash and Cash Equivalent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] United States United States Segment [Member] United States Segment Total equity Beginning Balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest 5.050% Medium-Term Notes, Series A Due August 20, 2031 5.050% Medium-Term Notes, Series A Due August 20, 2031 [Member] 5.050% Medium-Term Notes, Series A Due August 20, 2031 Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Effect of translation adjustment Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Foreign Currency Translation Gain (Loss) Due to Parent and affiliated companies and Other liabilities Due to Parent and affiliated companies Other Total Other Liabilities Affiliated Entity Affiliated Entity [Member] Unsecured debt Unsecured Debt 2028 Lessor, Operating Lease, Payment to be Received, Rolling Year Two Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Common stock, shares authorized (in shares) Common Stock, Shares Authorized 3.750% Medium-Term Notes, Series A Due October 25, 2027 3.750% Medium-Term Notes, Series A Due October 25, 2027 [Member] 3.750% Medium-Term Notes, Series A Due October 25, 2027 New automobile New Vehicle [Member] New vehicle. Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Number of reportable segments Segment Reporting [Line Items] HMC H M C [Member] HMC. Document Quarterly Report Document Quarterly Report Assets Derivative Asset [Abstract] Syndicated Bank Credit Facilities Syndicated Bank Credit Facilities [Member] Syndicated bank credit facilities. Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments Segments [Domain] Cash received for unearned subsidy income Cash Received For Unearned Subsidy Income Subsidy payments received from the Parent companies, which supplement the revenues on financing products offered under incentive programs. Subsidy payments received on retail loans and leases are deferred and recognized as revenue over the term of the related contracts. Interest rate swaps Interest Rate Swap [Member] Other Liabilities [Line Items] Other Liabilities [Line Items] Other Liabilities 2024 2023 Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Debt Debt Disclosure [Text Block] Principal collected on finance receivables Proceeds from Collection of Finance Receivables Accrued interest expense Interest Payable Actual net losses realized on operating leases Actual Gain (Loss) On Contract Termination Actual early termination net gain (losses) realized due to lessee defaults. Liabilities Derivative Liability [Abstract] 2031 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Five Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured debt Secured Debt [Member] Total expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Dividends declared Dividends, Common Stock, Cash Total shareholder’s equity Equity, Attributable to Parent Proceeds from issuance of short-term debt Proceeds from Other Short-Term Debt Assets Assets Assets [Abstract] 1.500% Medium-Term Notes, Series A Due October 19, 2027 1.500% Medium-Term Notes, Series A Due October 19, 2027 [Member] 1.500% Medium-Term Notes, Series A Due October 19, 2027 Total leased vehicle expenses, net Lessor, Operating Lease, Expense Lessor, Operating Lease, Expense Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Other Liabilities Disclosure [Abstract] Other Liabilities Disclosure [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Summary of Portfolio of Retail Loans and Dealer Loans Leases by Credit Quality Indicator Financing Receivable Credit Quality Indicators [Table Text Block] Dealer payables Dealer Payables Dealer payables primarily relate to settlements on loan/lease acquisitions. Operating lease liabilities Operating lease liabilities Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Income before income taxes and valuation adjustments Income (Loss) from Continuing Operations before Income Taxes and Valuation Adjustment, Noncontrolling Interest Income (Loss) from Continuing Operations before Income Taxes and Valuation Adjustment, Noncontrolling Interest Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Deferred income taxes Deferred Income Tax Expense (Benefit) Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Domain] Current Period, Gross charge-offs Current Period, Gross Write-Off [Abstract] Current Period, Gross Write-Off Motorcycle and other Motorcycles And Other [Member] Motorcycles and other. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Operating leases Total operating lease revenue, net Operating Lease, Lease Income Financing Receivables, Period Past Due Financial Asset, Aging [Domain] Entity Central Index Key Entity Central Index Key All Adjustments to Compensation All Adjustments to Compensation [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] Shareholder’s equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Public MTN Program Public Medium Term Note Program [Member] Public medium term note program. Expenses: Operating Expenses [Abstract] 2.850% Medium-Term Notes, Series A Due June 27, 2028 2.850% Medium-Term Notes, Series A Due June 27, 2028 [Member] 2.850% Medium-Term Notes, Series A Due June 27, 2028 Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Initial receivable principal balance underlying asset-backed securitization notes issued during period Secured Debt Gross Issued Initial Receivable Balance Initial receivable principal balance underlying asset-backed securitization notes issued during period. Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] City Area Code City Area Code Current Period Current Period [Abstract] Current Period Accumulated other comprehensive income (loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Name Forgone Recovery, Individual Name Performing Performing Financial Instruments [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Other debt Other Long Term Debt Fair Value Disclosure Including both current and noncurrent portions, fair value amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer. Statement [Line Items] Statement [Line Items] Accumulated undistributed earnings of HCFI Undistributed Earnings of Foreign Subsidiaries Total assets Total assets Assets Entity Entity [Domain] Interest expense Interest Expense, Operating Subsidy income and dealer rate participation, net Operating Lease, Subsidy Income And Dealer Rate Participation, Net Operating Lease, Subsidy Income And Dealer Rate Participation, Net Internal Credit Assessment Internal Credit Assessment [Domain] Operating Segments Operating Segments [Member] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Total net revenues Net Financing And Other Revenues, Adjusted Net Financing And Other Revenues, Adjusted Bank loans Loans Payable, Fair Value Disclosure HCI Honda Canada, Incorporated [Member] Honda Canada, Incorporated Other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] Debt Total debt Debt, Long-Term and Short-Term, Combined Amount Wholesale flooring Wholesale Flooring [Member] Wholesale flooring. Measurement Basis Measurement Basis [Axis] 2030 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Four Unearned subsidy income Related Party Finance Receivables Unearned Income Related party unearned subsidy income related to finance receivables. The Company receives subsidy payments from AHM and HCI, which supplement the revenues on financing products offered under incentive programs. Subsidy payments received on retail loans and leases are deferred and recognized as revenue over the term of the related contracts. The unearned balance is recognized as a reduction to the carrying value of finance receivables. Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Group I Group I [Member] Group I [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] 2029 Lessor, Operating Lease, Payment to be Received, Rolling Year Three Retained earnings Retained Earnings [Member] Commercial paper Commercial Paper Fair Value Disclosure Fair value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days. Revolving lines of credit Revolving Credit Facility [Member] Revolving loans Revolving loans Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Summary of Carrying Values and Fair Values of Financial Instruments Except for those Measured at Fair Value on a Recurring Basis Fair Value, by Balance Sheet Grouping [Table Text Block] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Accrued benefit expenses Related Party Accrued Benefit Expense Accrued benefit expenses due to related parties. Internal Credit Assessment Internal Credit Assessment [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Credit grade C Credit Grade C [Member] Credit Grade C [Member] Retail Interest and Fee Income, Loans, Consumer Installment, Automobiles, Marine, and Other Vehicles Investment in operating leases, net Investment in operating leases, net Property, Plant, and Equipment, Lessor Asset under Operating Lease, after Accumulated Depreciation 2024 2023 Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Construction Of Automobile Dealerships Construction Of Automobile Dealerships [Member] Construction Of Automobile Dealerships Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] 2028 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Two Asset-backed securitization notes issued during period Secured Debt Gross Issued Asset-backed securitization notes issued during period. Group II Group II [Member] Group II [Member] 2023 2022 Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Net derivative assets Derivative Asset Other income, net Other Income Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Less: Comprehensive income attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Fair value Estimate of Fair Value Measurement [Member] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Accrued interest/discounts on debt Increase (Decrease) in Interest Payable, Net Paydown of medium-term notes and other debt Repayments of Medium-Term Note Other investing activities, net Payment for (Proceeds from) Other Investing Activity Operating lease, weighted average discount rate (percentage) Operating Lease, Weighted Average Discount Rate, Percent Bank loans Bank Loans [Member] Bank loans. Segment Reporting [Table] Segment Reporting [Table] Related Party Transaction [Table] Related Party Transaction [Table] Retail Retail loans Retail Loan [Member] Retail loan. Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Provision for credit losses Provision Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Amortization of deferred dealer participation and other deferred costs Amortization of Deferred Charges Public MTN Program Notes Payable, Fair Value Disclosure Bank loans, carrying value Loans Payable to Bank Collateral Held Collateral Held [Axis] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Syndicated Bank Credit Facilities With Three Year Credit Agreement Syndicated Bank Credit Facilities With Three Year Credit Agreement [Member] Syndicated bank credit facilities with three year credit agreement. Revolving loans Financing Receivable, Excluding Accrued Interest, Revolving Impairment losses Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Summary of Activity in Allowance for Credit Losses of Finance Receivables Financing Receivable, Allowance for Credit Loss [Table Text Block] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Syndicated Bank Credit Facilities With Five Year Credit Agreement Syndicated Bank Credit Facilities With Five Year Credit Agreement [Member] Syndicated bank credit facilities with five year credit agreement [Member] Summary of Carrying Amounts of Assets and Liabilities of Consolidated Securitization Trusts Schedule of Variable Interest Entities [Table Text Block] Entity Information [Line Items] Entity Information [Line Items] Other Assets Other Assets Disclosure [Text Block] Others Credit Grade, Other [Member] Credit Grade, Other [Member] Equity Components Equity Components [Axis] Related Party Related Party [Member] Accretion of unearned subsidy income The amount of previously reported deferred credits on long-term arrangements that was recognized as revenue during the period The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method Income taxes paid Income Tax Paid, after Refund Received Entity Interactive Data Current Entity Interactive Data Current Less: Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Summary of Operating Lease Expense Operating Lease, Lease Expense [Table Text Block] Operating Lease, Lease Expense [Table Text Block] Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income attributable to American Honda Finance Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Dealer Dealer loans Dealer Loan [Member] Dealer loan. Termination Date Trading Arrangement Termination Date Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Summary of Business and Significant Accounting Policies Business Description and Accounting Policies [Text Block] Income taxes receivable/payable Increase (Decrease) in Income Taxes Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Proceeds from issuance of medium-term notes and other debt Proceeds from Issuance of Medium-Term Note MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Other liabilities: Other Liabilities [Abstract] Fair Value as of Grant Date Award Grant Date Fair Value Outstanding principal balance of long-term debt with floating interest rates Long-Term Debt, Percentage Bearing Variable Interest, Amount Collateral Pledged Collateral Pledged [Member] Gain on disposition of leased vehicles Gain (Loss) on Disposition of Assets Realized (gains)/losses on derivatives and foreign currency denominated debt Realized Gain Loss On Derivatives And Foreign Currency Denominated Debt Realized (gains)/losses on derivatives and foreign currency denominated debt, which is added back for purposes of reporting segment net revenues using managements internal measurement basis. Dealer loans, net Dealer Loans Net Fair Value Disclosure Net dealer loan balances as reported in the balance sheet, for purposes of fair value footnote disclosure, including the fair value amounts. Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Remaining unfunded balance for construction loans Loans And Leases Receivable Commitments Remaining Unfunded Amount Of Construction Loans Remaining unfunded amount of commercial lending committed to dealers, in the form of construction loans. Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Honda Motor Company required ownership interest (percentage) Minimum Ownership Interest Of Voting Stock Required By Support Agreement The ultimate parent company's required ownership interest as required by the support agreement. Local Phone Number Local Phone Number Consolidation Items Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income before income taxes Income before income taxes and valuation adjustments Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies (Note 8) Commitments and Contingencies Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Other Assets [Abstract] Other Assets [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Other Credit Agreements Other Credit Agreements [Member] Other credit agreements. Executive Category: Executive Category [Axis] Deferred dealer participation and other deferred costs Deferred Dealer Participation And Other Deferred Costs For a limited number of contracts, origination fees include payments received from dealers to buy down the interest rates charged to their customers. Deferred origination costs include other direct origination costs and payments made to dealers for rate participation. Liabilities and Equity Liabilities and Equity [Abstract] Net revenues Net Financing Revenues Excluding Other Revenues, Adjusted Net Financing Revenues Excluding Other Revenues, Adjusted Summary of Fair Value Hierarchy of Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Dealer loans, net, carrying value Dealer Loans Net Net dealer loan balances as reported in the balance sheet at the carrying value amounts, for purposes of fair value footnote disclosure. Level 3 Fair Value, Inputs, Level 3 [Member] Variable Interest Entity [Table] Variable Interest Entity [Table] Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Dealer Interest and Fee Income, Loans, Commercial Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities PEO Name PEO Name Total Lessor, Operating Lease, Payment to be Received Long-Lived Asset, Class Long-Lived Asset, Class [Axis] Paydown of secured debt Repayments of Secured Debt Other assets Total Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] 30 – 59 days past due Financial Asset, 30 to 59 Days Past Due [Member] Entity Tax Identification Number Entity Tax Identification Number Outstanding principal balance of long-term debt with fixed interest rates Long-Term Debt, Percentage Bearing Fixed Interest, Amount Legal Entity Legal Entity [Axis] Summary of Aging Analysis of Past Due Finance Receivables Financing Receivable, Past Due [Table Text Block] Current or less than 30 days past due Financial Asset, Not Past Due [Member] Canada Canada Segment [Member] Canada Segment Other Liabilities [Table] Other Liabilities [Table] Other Liabilities [Table] Cash and cash equivalents and restricted cash at beginning of period Cash and cash equivalents and restricted cash at end of period Total Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Lease payments Operating Lease, Lease Income, Lease Payments Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Unearned subsidy income Related Party Unearned Subsidy Income Related party unearned subsidy income related to operating leases. The Company receives subsidy payments from AHM and HCI, which supplement the revenues on financing products offered under incentive programs. Subsidy payments received on retail loans and leases are deferred and recognized as revenue over the term of the related contracts. The unearned balance is recognized as a reduction to the carrying value of the investment in operating leases. Debt Instrument Debt Instrument [Axis] Retail loans, net, carrying value Retail Loans Net Net retail loan balances as reported in the balance sheet at the carrying value amounts, for purposes of fair value footnote disclosure. Unearned subsidy income Finance Receivables Unearned Income Subsidy payments received from the Parent companies, which supplement the revenues on financing products offered under incentive programs. Subsidy payments received on retail loans are deferred and recognized as revenue over the term of the related contracts. The unearned balance is recognized as reductions to the carrying value of finance receivables. Cash to be remitted to trusts Cash To Be Remitted To Trust Cash collections on receivables underlying asset-backed securitization notes, which were required to be remitted to the trusts. Net change in wholesale loans Payments for (Proceeds from) Loans and Leases Summary of Outstanding Debt, Weighted Average Contractual Interest Rates and Range of Contractual Interest Rates Schedule of Debt [Table Text Block] Short-Term Debt Short-Term Debt [Member] Long-term Debt, Type Long-Term Debt, Type [Domain] Summary of Notional Balances and Fair Values of Derivatives Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Unearned income, operating leases Deferred Revenue Insider Trading Arrangements [Line Items] Summary of Income Statement Impact of Derivative Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Commitments And Contingencies Disclosure [Line Items] Commitments And Contingencies Disclosure [Line Items] Commitments and contingencies disclosure. Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Other liabilities Other Sundry Liabilities Retained earnings Retained Earnings (Accumulated Deficit) Paydown of commercial paper Repayments of Commercial Paper Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] 2029 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Three Proceeds from issuance of secured debt Proceeds from Issuance of Secured Debt Common stock Common Stock [Member] Estimated early termination losses Estimated Early Termination Losses Related To Operating Leases Accrued early termination losses related to operating leases based on estimated lessee defaults. Fair Value Measurement Fair Value Measurement [Domain] Summary of Operating Lease Revenue Operating Lease, Lease Income [Table Text Block] Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Secured debt Secured Debt, Fair Value Disclosure Fair value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] 2023 2022 Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Cover [Abstract] Uncertain tax positions Liability For Uncertain Tax Positions The current and noncurrent portions of the amount recognized for uncertain tax positions as of the balance sheet date. Derivative Contract Derivative Contract [Domain] 2026 2025 Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Net revenues Net Financing Revenues Excluding Other Revenues Aggregate amount of financing revenues from operating lease payments and interest income from financing after deducting depreciation on leases and interest expense, excluding gain/loss on disposition of lease vehicles and other revenues. Equity Awards Adjustments Equity Awards Adjustments [Member] Total past due Financial Asset, Past Due [Member] Purchase of operating lease vehicles Payments to Acquire Equipment on Lease Total net revenues Net Financing And Other Revenues Aggregate amount of financing revenues from operating lease payments and interest income from financing after deducting depreciation on leases and interest expense, gain/loss on disposition of lease vehicles and other revenues not separately reported on the consolidated statement of income. Lease security deposits Security Deposit Liability Total liabilities and equity Liabilities and Equity 3.950% Medium-Term Notes, Series A Due March 19, 2032 3.950% Medium-Term Notes, Series A Due March 19, 2032 [Member] 3.950% Medium-Term Notes, Series A Due March 19, 2032 Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Noncontrolling interest in subsidiary Equity, Attributable to Noncontrolling Interest Retail loans and leases threshold delinquent (percent) (more than) Retail Loans And Leases Delinquent Percentage The cumulative threshold percentage past due of the scheduled payments at which retail loans and leases are considered delinquent. Summary of Contractual Operating Lease Payments Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Segments Segments [Axis] Other liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Initial direct costs and other lessor costs Operating Lease, Initial Direct Cost Expense And Other Lessor Costs Operating Lease, Initial Direct Cost Expense And Other Lessor Costs Related Party Related and Nonrelated Parties [Domain] Summary of Finance Receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Tabular List, Table Tabular List [Table Text Block] Other debt, carrying value Other Long-Term Debt Group III Grade III [Member] Grade III [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Average outstanding balance Line of Credit Facility, Average Outstanding Amount Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] General and administrative expenses General and Administrative Expense Long-Lived Asset, Class Long-Lived Asset, Class [Domain] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Axis] Used and certified automobile Used Vehicle [Member] Used vehicle. Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Credit grade A Credit Grade A [Member] Credit Grade A [Member] Total revenues Subsidy income Interest and Fee Income, Financing Receivable, Held-in-Portfolio Adjustment to Compensation: Adjustment to Compensation [Axis] AHFC American Honda Finance Corporation [Member] American Honda Finance Corporation Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] 60 – 89 days past due Financial Asset, 60 to 89 Days Past Due [Member] Provision for credit losses on operating leases Provision For Lease Losses On Past Due Receivables Amount based on estimated operating lease losses from past due receivables. Credit Facility Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets Assets, Fair Value Disclosure Total finance receivables Finance Receivables Net Excluding Credit Losses And Write Downs Total finance receivables herein are presented for purposes of disclosing the aging of past due finance receivables. Amounts include the finance receivables, net balance as presented on our balance sheet, excluding the allowance for credit losses and the write-down of lease residual values. Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Collateral posted/held Derivative Asset, Collateral Posted Derivative Asset, Collateral Posted Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Entity Filer Category Entity Filer Category Retail loans, net Retail Loans Net Fair Value Disclosure Net retail loan balances as reported in the balance sheet, for purposes of fair value footnote disclosure, including the fair value amounts. Debt and derivative instrument valuation adjustments Debt And Derivative Instrument Valuation Adjustment The increase (decrease) during the period in the carrying value of derivative instruments reported as assets or liabilities that are due to be disposed of within one year (or the normal operating cycle, if longer). 0.300% Medium-Term Notes, Series A Due July 7, 2028 0.300% Medium-Term Notes, Series A Due July 7, 2028 [Member] 0.300% Medium-Term Notes, Series A Due July 7, 2028 Name Trading Arrangement, Individual Name Cross currency swaps Currency Swap [Member] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent 2027 Lessee, Operating Lease, Liability, to be Paid, Next Rolling 12 Months (Gain)/Loss on derivative instruments Total gain/(loss) on derivative instruments Gain/(loss) on derivative instruments Gain (Loss) on Derivative Instruments, Net, Pretax Vehicles held for disposition Vehicles Held For Sale Vehicles held for disposition consist of returned and repossessed vehicles. The vehicles are either sold at used vehicle auctions or purchased by dealers, usually within two months of return or repossession. The vehicles are valued at the lower of their carrying value or estimated fair value, less estimated disposition costs. Lease expense Lease expense under operating leases Operating Lease, Expense Company Selected Measure Amount Company Selected Measure Amount Financing Receivables, Period Past Due Financial Asset, Aging [Axis] Income taxes receivable Income Taxes Receivable Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Support Compensation Agreement fees Related Party Support Compensation Agreement Fees Related party support expense related to certain debt programs. The Company has entered into separate Support Compensation Agreements, where each has agreed to pay the ultimate parent company a quarterly fee based on the amount of outstanding debt that benefit from the Keep Well Agreements. Support Compensation Agreement fees are recognized in general and administrative expenses. Operating lease, weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Net derivative liabilities Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Depreciation on leased vehicles Depreciation, Nonproduction Income tax expense Income Tax Expense (Benefit) Deferred dealer participation and initial direct costs Deferred Initial Direct Cost, Lease, after Accumulated Amortization (Gain)/Loss on foreign currency revaluation of debt Gain/(loss) on foreign currency revaluation of debt Gain (Loss), Foreign Currency Transaction, before Tax Award Timing Method Award Timing Method [Text Block] Organizational Structure Consolidation, Policy [Policy Text Block] Net decrease in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Paydown of short-term debt Repayments of Other Short-Term Debt Charge-offs Total Total Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Net income attributable to American Honda Finance Corporation Net Income (Loss) Attributable to Parent Long-term Debt, Type Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Disposal of operating lease vehicles Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Restatement Determination Date: Restatement Determination Date [Axis] Other debt Other Debt [Member] Other debt. 2026 2025 Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Gain on disposition of leased vehicles Gain (Loss) on Sale of Leased Assets, Net, Operating Leases HCFI Honda Canada Finance Incorporated [Member] Honda Canada Finance Incorporated Derivative instruments Gross derivative assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Summary of Components of Other Assets Schedule of Other Assets [Table Text Block] Revenues: Revenue: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]