Entity Central Index Key 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. Amount, after unamortized (discount) premium and debt issuance costs, of short and long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Offset to downward adjustments for declines in estimated residual values of direct financing leases deemed to be other-than-temporary recognized as a loss on lease residual values in the period in which the estimate changed. Unearned interest income on direct financing lease, which is recognized as finance revenue over the term of the lease using the interest method. Related origination fees and costs are recognized as revenue using the interest method over the contractual life of the direct financing lease. 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 initial direct origination costs and payments made to dealers for rate participation. 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. Portion of unamortized costs and subsidy income, net, related to securitized finance receivables. 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. 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. 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. Downward adjustments for declines in estimated residual values of direct financing leases deemed to be other-than-temporary recognized as a loss on lease residual values in the period in which the estimate changed. Document and entity information. Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Well-known Seasoned Issuer Entity Well Known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Statement Of Financial Position [Abstract] Statement [Table] Statement [Table] Variable Interest Entities Variable Interest Entities By Classification Of Entity [Axis] Variable Interest Entity, Classification Classification Of Variable Interest Entity [Domain] Consolidated variable interest entities Variable Interest Entity Primary Beneficiary [Member] Statement [Line Items] Statement [Line Items] Assets Assets [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Finance receivables, net Notes Receivable Net Investment in operating leases, net Property Subject To Or Available For Operating Lease Net Due from Parent and affiliated companies Due From Affiliates Income taxes receivable Income Tax Receivable Vehicles held for disposition Vehicles Held For Sale Other assets Other Assets Derivative instruments Derivative Fair Value Of Derivative Asset Total assets Assets Liabilities and Equity Liabilities And Stockholders Equity [Abstract] Debt Short Term Borrowings And Long Term Debt Due to Parent and affiliated companies Due To Affiliate Current And Noncurrent Secured debt Secured Debt Accrued interest expense Interest Payable Current And Noncurrent Deferred income taxes Deferred Income Tax Liabilities Net Other liabilities Other Liabilities Derivative instruments Derivative Fair Value Of Derivative Liability Total liabilities Liabilities Commitments and contingencies (Note 8) Commitments And Contingencies Shareholder’s equity: Stockholders Equity [Abstract] Common stock, $100 par value. Authorized 15,000,000 shares; issued and outstanding 13,660,000 shares as of June 30, 2017 and March 31, 2017 Common Stock Value Retained earnings Retained Earnings Accumulated Deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Total shareholder’s equity Stockholders Equity Noncontrolling interest in subsidiary Minority Interest Total equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total liabilities and equity Liabilities And Stockholders Equity Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Income Statement [Abstract] Revenues: Revenues [Abstract] Direct financing leases Capital Leases Income Statement Direct Financing Lease Revenue Retail Interest And Fee Income Loans Consumer Installment Automobiles Marine And Other Vehicles Dealer Interest And Fee Income Loans Commercial Operating leases Operating Leases Income Statement Minimum Lease Revenue Total revenues Interest And Fee Income Loans And Leases Held In Portfolio Depreciation on operating leases Operating Leases Income Statement Depreciation Expense On Property Subject To Or Held For Lease Interest expense Interest Expense Net revenues Net Financing Revenues Excluding Other Revenues Gain/(Loss) on disposition of lease vehicles Gain Loss On Sale Of Leased Assets Net Operating Leases Other income Other Income Total net revenues Net Financing And Other Revenues Expenses: Operating Expenses [Abstract] General and administrative expenses General And Administrative Expense Provision for credit losses Provision For Loan And Lease Losses Early termination loss on operating leases Gain Loss On Contract Termination Loss on lease residual values Gain Loss On Lease Residual Values (Gain)/Loss on derivative instruments Gain Loss On Derivative Instruments Net Pretax (Gain)/Loss on foreign currency revaluation of debt Foreign Currency Transaction Gain Loss Before Tax Total expenses Operating Expenses Income before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense Income Tax Expense Benefit Net income Profit Loss Less: Net income attributable to noncontrolling interest Net Income Loss Attributable To Noncontrolling Interest Net income attributable to American Honda Finance Corporation Net Income Loss Statement Of Income And Comprehensive Income [Abstract] Net income Other comprehensive income: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Foreign currency translation adjustment Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax Comprehensive income Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Less: Comprehensive income attributable to noncontrolling interest Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Comprehensive income attributable to American Honda Finance Corporation Comprehensive Income Net Of Tax Statement Of Stockholders Equity [Abstract] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Retained earnings Retained Earnings [Member] Accumulated other comprehensive income/(loss) Accumulated Other Comprehensive Income [Member] Common stock Common Stock [Member] Noncontrolling interest Noncontrolling Interest [Member] Balance Other comprehensive income Other Comprehensive Income Loss Net Of Tax Balance 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). Cash flow impact from the combined cost of loss on lease residual values and provision for credit losses. Gain loss on contract termination and impairment on operating leases. 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. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Debt and derivative instrument valuation adjustments Debt And Derivative Instrument Valuation Adjustment Loss on lease residual values and provision for credit losses Loss On Lease Residual Values And Provision For Credit Losses Early termination loss on operating leases and impairment on operating leases Gain Loss On Contract Termination And Impairment On Operating Leases Depreciation and amortization Depreciation And Amortization Accretion of unearned subsidy income Recognition Of Deferred Revenue Amortization of deferred dealer participation and other deferred costs Amortization Of Deferred Charges Gain on disposition of lease vehicles and fixed assets Deferred income taxes Deferred Income Tax Expense Benefit Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Income taxes receivable/payable Increase Decrease In Income Taxes Other assets Increase Decrease In Other Operating Assets Accrued interest/discounts on debt Increase Decrease In Interest Payable Net Other liabilities Increase Decrease In Other Operating Liabilities Due to/from Parent and affiliated companies Increase Decrease Due From Affiliates Net cash provided by operating activities Net Cash Provided By Used In Operating Activities Continuing Operations Cash flows from investing activities: Net Cash Provided By Used In Investing Activities Continuing Operations [Abstract] Finance receivables acquired Payments To Acquire Finance Receivables Principal collected on finance receivables Proceeds From Collection Of Finance Receivables Net change in wholesale loans Payments For Proceeds From Loans And Leases Purchase of operating lease vehicles Payments To Acquire Leases Held For Investment Disposal of operating lease vehicles Proceeds From Leases Held For Investment Cash received for unearned subsidy income Cash Received For Unearned Subsidy Income Other investing activities, net Payments For Proceeds From Other Investing Activities Net cash used in investing activities Net Cash Provided By Used In Investing Activities Continuing Operations Cash flows from financing activities: Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract] Proceeds from issuance of commercial paper Proceeds From Issuance Of Commercial Paper Paydown of commercial paper Repayments Of Commercial Paper Proceeds from issuance of related party debt Proceeds From Related Party Debt Paydown of related party debt Repayments Of Related Party Debt Paydown of medium term notes and other debt Repayments Of Medium Term Notes Proceeds from issuance of secured debt Proceeds From Issuance Of Secured Debt Paydown of secured debt Repayments Of Secured Debt Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Continuing Operations Effect of exchange rate changes on cash and cash equivalents Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations Net increase/(decrease) in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid Income taxes paid Income Taxes Paid Net Organization Consolidation And Presentation Of Financial Statements [Abstract] Interim Information Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Text Block] Receivables [Abstract] Finance Receivables Financing Receivables [Text Block] Leases Operating [Abstract] Investment in Operating Leases Operating Leases Of Lessor Disclosure [Text Block] Debt Disclosure [Abstract] Debt Debt Disclosure [Text Block] Derivative Instruments And Hedging Activities Disclosure [Abstract] Derivative Instruments Derivative Instruments And Hedging Activities Disclosure [Text Block] Related Party Transactions [Abstract] Transactions Involving Related Parties Related Party Transactions Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] The entire disclosure for the Company's securitizations and variable interest entities. Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities [Abstract] Securitizations and Variable Interest Entities (VIE) Securitizations And Variable Interest Entities Disclosure [Text Block] Other Assets [Abstract] Other Assets Other Assets Disclosure [Text Block] Other Liabilities Disclosure [Abstract] Other Liabilities Other Liabilities Disclosure [Text Block] Other Income And Expenses [Abstract] Other Income, Net Other Income And Other Expense Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Measurement Inputs Disclosure [Text Block] Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Recently Issued Accounting Standards New Accounting Pronouncements Policy Policy [Text Block] Allowance for Credit Losses Loans And Leases Receivable Allowance For Loan Losses Policy Segment Reporting Segment Reporting Policy Policy [Text Block] Summary of Finance Receivables Schedule Of Accounts Notes Loans And Financing Receivable [Text Block] Summary of Activity in Allowance for Credit Losses of Finance Receivables Allowance For Credit Losses On Financing Receivables Table [Text Block] Summary of Aging Analysis of Past Due Finance Receivables Past Due Financing Receivables Table [Text Block] Summary of Portfolio of Retail Loans and Direct Financing Leases by Credit Quality Indicator Financing Receivable Credit Quality Indicators Table [Text Block] Tabular disclosure of summary of outstanding dealer loans by grouping. Summary of Outstanding Dealer Loans by Grouping Summary Of Outstanding Dealer Loans By Grouping Table [Text Block] Schedule of Investment in Operating Leases Schedule Of Property Subject To Or Available For Operating Lease [Text Block] Schedule of Outstanding Debt Net of Discounts and Fees, Weighted Average Contractual Interest Rates and Range of Contractual Interest Rates Schedule Of Debt Table [Text Block] Notional Balances and Fair Values of Derivatives Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block] Income Statement Impact of Derivative Instruments Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block] Derivative Instruments Derivatives Policy [Text Block] Summary of Income Statement and Balance Sheet Impact of Transactions with Parent and Affiliated Companies Schedule Of Related Party Transactions Table [Text Block] Legal Proceedings Legal Costs Policy [Text Block] Securitizations and Variable Interest Entities (VIE) Consolidation Variable Interest Entity Policy Schedule of Carrying Amounts of Assets and Liabilities of Consolidated Securitization Trusts Schedule Of Variable Interest Entities [Text Block] Schedule of Other Assets Schedule Of Other Assets Table [Text Block] Components of Other Liabilities Other Liabilities Table [Text Block] Components of Other Income Interest And Other Income Table [Text Block] Fair Value Measurements Fair Value Measurement Policy Policy [Text Block] 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] Summary of Nonrecurring Fair Value Measurements Recognized for Assets Fair Value Assets Measured On Nonrecurring Basis [Text Block] 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 [Text Block] Financial Information for the Company's Reportable Segments Schedule Of Segment Reporting Information By Segment [Text Block] Schedule Of Accounts Notes Loans And Financing Receivable [Table] Schedule Of Accounts Notes Loans And Financing Receivable [Table] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment Financing Receivable Portfolio Segment [Domain] Lease Finance Leases Portfolio Segment [Member] Retail loan. Retail Retail Loan [Member] Dealer loan. Dealer Dealer Loan [Member] Accounts Notes And Loans Receivable [Line Items] Accounts Notes And Loans Receivable [Line Items] Finance receivables Notes Receivable Gross Allowance for credit losses Financing Receivable Allowance For Credit Losses Write-down of lease residual values Write Down Of Lease Residual Values Unearned interest income and fees Unearned Interest Income And Fees Deferred dealer participation and IDC Deferred Dealer Participation Unearned subsidy income Finance Receivables Unearned Income Finance receivables, net Class of Financing Receivable, Type Financing Receivable Recorded Investment By Class Of Financing Receivable [Axis] Class of Financing Receivable, Type Financing Receivable Recorded Investment Class Of Financing Receivable [Domain] Principal balance of finance receivables securitized Principal Amount Outstanding On Loans Securitized End of term charges included in the gain/loss on disposition of lease vehicles. Uninsured portions of both direct financing and operating lease residual values. Uninsured portions of direct financing lease residual values Non Guaranteed Direct Financing Lease Residual Values End of term charges included in the gain/loss on disposition of lease vehicles Gain Loss On Disposition Of Assets Held For Sale End Of Term Charges Dealer loans modified as troubled debt restructurings Financing Receivable Modifications Recorded Investment Schedule Of Financing Receivable Allowance For Credit Losses [Table] Schedule Of Financing Receivable Allowance For Credit Losses [Table] Financing Receivable Allowance For Credit Losses [Line Items] Financing Receivable Allowance For Credit Losses [Line Items] Beginning balance Provision Provision For Loan Losses Expensed Charge-offs Financing Receivable Allowance For Credit Losses Write Offs Recoveries Financing Receivable Allowance For Credit Losses Recovery Effect of translation adjustment Allowance For Loan And Lease Losses Foreign Currency Translation Ending balance Individually evaluated for impairment Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 Collectively evaluated for impairment Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment Individually evaluated for impairment - Finance receivables Financing Receivable Individually Evaluated For Impairment Collectively evaluated for impairment - Finance receivables Financing Receivable Collectively Evaluated For Impairment 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. Schedule Of Financing Receivables Past Due [Table] Schedule Of Financing Receivables Past Due [Table] Financing Receivables, Period Past Due Financing Receivables Period Past Due [Axis] Financing Receivables, Period Past Due Financing Receivables Period Past Due [Domain] Financing Receivables, 30 – 59 days past due Financing Receivables30 To59 Days Past Due [Member] Financing Receivables, 60 - 89 days past due Financing Receivables60 To89 Days Past Due [Member] Financing Receivables, 90 days or greater past due Financing Receivables Equal To Greater Than90 Days Past Due [Member] Direct financing leases New vehicle. New auto New Vehicle [Member] Used vehicle. Used and certified auto Used Vehicle [Member] Motorcycles and other. Motorcycle and other Motorcycles And Other [Member] Wholesale flooring. Wholesale flooring Wholesale Flooring [Member] Commercial loans. Commercial loans Commercial Loans [Member] Financing Receivable Recorded Investment Past Due [Line Items] Financing Receivable Recorded Investment Past Due [Line Items] Total past due Financing Receivable Recorded Investment Past Due Current or less than 30 days past due Financing Receivable Recorded Investment Current Total finance receivables Finance Receivables Net Excluding Credit Losses And Write Downs Threshold delinquency period after which finance receivables are considered nonperforming. Threshold delinquency period of nonperforming finance receivables Minimum Period After Which Loans To Be Considered Non Performing Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Total consumer finance receivables Consumer Portfolio Segment [Member] Financial Instrument Performance Status Financial Instrument Performance Status [Axis] Financial Instrument Performance Status Financial Instrument Performance Status [Domain] Performing Financing Receivable Performing Financing Receivable [Member] Nonperforming Financing Receivable Nonperforming Financing Receivable [Member] Financing Receivable Recorded Investment [Line Items] Financing Receivable Recorded Investment [Line Items] Consumer finance receivables Loans And Leases Receivable Consumer Lease Financing Amount before allowance of dealer loan agreements. Internal Credit Assessment Internal Credit Assessment [Axis] Internal Credit Assessment Internal Credit Assessment [Domain] Group A. Group A Group A [Member] Group B. Group B Group B [Member] Dealer finance receivables Loans And Leases Receivable Dealer Financing 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. Accrued early termination losses related to operating leases based on estimated lessee defaults. Leases [Abstract] Operating lease vehicles Property Subject To Or Available For Operating Lease Gross Accumulated depreciation Property Subject To Or Available For Operating Lease Accumulated Depreciation Deferred dealer participation and IDC Deferred Costs Leasing Net Unearned subsidy income Leases Unearned Subsidy Income Estimated early termination losses Estimated Early Termination Losses Related To Operating Leases Investment in operating leases, net Actual early termination net losses realized due to lessee defaults. Operating leases [Abstract] Estimated early termination losses on operating leases Actual early termination net losses realized on operating leases Actual Loss On Contract Termination Amount included in the provision for credit losses based on estimated operating lease losses from past due receivables. Provision for credit losses on operating leases Provision For Lease Losses On Past Due Receivables Impairment loss on operating leases Operating Lease Impairment Loss Debt Instrument [Table] Debt Instrument [Table] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Commercial Paper Commercial Paper [Member] Related party debt. Related Party Debt Related Party Debt [Member] Bank loans. Bank Loans Bank Loans [Member] Private medium term note program. Private MTN Program Private Medium Term Note Program [Member] Public medium term note program. Public MTN Program Public Medium Term Note Program [Member] Europe medium term note program. Euro MTN Programme Europe Medium Term Note Program [Member] Other debt. Other Debt Other Debt [Member] Secured Debt Secured Debt [Member] Range Range [Axis] Range Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Unsecured debt Unsecured Debt Total debt Weighted average contractual interest rate Debt Weighted Average Interest Rate Contractual interest rate range Debt Instrument Interest Rate Stated Percentage Legal Entity Legal Entity [Axis] Entity Entity [Domain] American Honda Finance Corporation AHFC American Honda Finance Corporation [Member] Honda Canada Finance Incorporated HCFI Honda Canada Finance Incorporated [Member] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Syndicated bank credit facilities with three hundreds sixty four day credit agreement [Member]. 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 year credit agreement. Syndicated Bank Credit Facilities With Three Year Credit Agreement Syndicated Bank Credit Facilities With Three Year Credit Agreement [Member] Syndicated bank credit facilities with five year credit agreement [Member] Syndicated Bank Credit Facilities With Five Year Credit Agreement Syndicated Bank Credit Facilities With Five Year Credit Agreement [Member] Syndicated bank credit facilities. Syndicated Bank Credit Facilities Syndicated Bank Credit Facilities [Member] Syndicated bank credit facilities with one year revolving term. Syndicated Bank Credit Facilities With One Year Revolving Term Syndicated Bank Credit Facilities With One Year Revolving Term [Member] Syndicated bank credit facilities with five year revolving term. Syndicated Bank Credit Facilities With Five Year Revolving Term Syndicated Bank Credit Facilities With Five Year Revolving Term [Member] Other credit agreements. Other Credit Agreements Other Credit Agreements [Member] Outstanding principal balance of long-term debt with floating interest rates Longterm Debt Percentage Bearing Variable Interest Amount Outstanding principal balance of long-term debt with fixed interest rates Longterm Debt Percentage Bearing Fixed Interest Amount Short-term debt Short Term Borrowings Maximum funds available Line Of Credit Facility Maximum Borrowing Capacity Average outstanding balance Line Of Credit Facility Average Outstanding Amount Maximum balance outstanding at any month-end Line Of Credit Facility Maximum Monthend Outstanding Amount Notes payable issued related parties classified current. Related party interest expense incurred Interest Expense Related Party Related party notes outstanding Notes Payable Related Parties Classified Current Related party notes issued Notes Payable Issued Related Parties Classified Current Line of credit facility current borrowing capacity Line Of Credit Facility Current Borrowing Capacity Debt instrument, term Debt Instrument Term Line of credit facility expiration date Line Of Credit Facility Expiration Date1 Line of credit facility outstanding amount Line Of Credit Line of credit facility expiration month and year. Line of credit facility agreement expiration date Line Of Credit Facility Expiration Month And Year Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Derivative Instrument Derivative Instrument Risk [Axis] Derivative Contract Derivative Contract Type [Domain] Interest rate swaps Interest Rate Swap [Member] Cross currency swaps Currency Swap [Member] Derivatives Fair Value [Line Items] Derivatives Fair Value [Line Items] Notional balances Derivative Notional Amount Gross derivative assets Counterparty netting, Assets Derivative Asset Collateral Obligation To Return Cash Offset Net derivative assets Derivative Assets Gross derivative liabilities Counterparty netting, Liabilities Derivative Liability Collateral Right To Reclaim Cash Offset Net derivative liabilities Derivative Liabilities Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments Gain Loss [Line Items] Derivative Instruments Gain Loss [Line Items] Total gain/(loss) on derivative instruments Related party fees to AHM for services provided in support of AHFC’s performance of VSC administrative services. 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. 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. 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. Schedule Of Related Party Transactions By Related Party [Table] Schedule Of Related Party Transactions By Related Party [Table] Related Party Related Party Transactions By Related Party [Axis] Related Party Related Party [Domain] Affiliated Entity Affiliated Entity [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Revenue: Subsidy income Revenue From Related Parties Interest expense: Interest Expense [Abstract] Related party debt Other income, net: VSC administration fees Related Party Transaction Other Revenues From Transactions With Related Party Support service fee Related Party Support Service Fees General and administrative expenses: General And Administrative Expense [Abstract] Support compensation agreement fees Related Party Support Compensation Agreement Fees Benefit plan expenses Related Party Benefit Plan Expense Shared services Related Party Shared Services Fee 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. Investment in operating leases net. 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. Accrued interest expense from related party debt. Related party fees received in connection with vehicle service contract administrative services to be performed or yet to be earned. Accrued benefit expenses due to related parties. Finance receivables, net: Notes Receivable Net [Abstract] Unearned subsidy income Related Party Finance Receivables Unearned Income Investment in operating leases, net: Investment In Operating Leases Net [Abstract] Unearned subsidy income Related Party Unearned Subsidy Income Debt: Debt Instruments [Abstract] Related party debt Due To Related Parties Current And Noncurrent Accrued interest expenses: Accrued Liabilities Current And Noncurrent [Abstract] Related party debt Accrued Interest Expense Related Party Debt Other liabilities: Other Liabilities [Abstract] VSC unearned administrative fees Related Party Unearned Administrative Fees Accrued benefit expenses Related Party Accrued Benefit Expense The ultimate parent company's required ownership interest as required by the support agreement. HMC. Honda Motor Co., Ltd. H M C [Member] American Honda Motor Corporation Inc. AHM American Honda Motor Corporation Inc [Member] American honda service contract. AHSCC American Honda Service Contract [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Honda Motor Company required ownership interest Minimum Ownership Interest Of Voting Stock Required By Support Agreement The Parent company periodically sponsors programs that allow lessees to terminate their lease contracts prior to the contractual maturity date. These funds represent compensation to the Company for rental payments that were waived under these programs and are recorded within the gain on disposal of the returned lease vehicles. Amounts received are a cost recoupment whereby no gain or loss is ultimately recognized. Compensating funds from parent for waived rental payments of returned lease vehicles Related Party Gain Loss On Disposition Of Assets Held For Sale Sale of common stock issued and outstanding to AHM Equity Method Investment Sold Carrying Amount Declared and paid cash dividend Dividends Cash Effective income tax rate Effective Income Tax Rate Continuing Operations Accumulated undistributed earnings of HCFI Undistributed Earnings Of Foreign Subsidiaries Unrecognized deferred tax liability from undistributed foreign earnings Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability Undistributed Earnings Of Foreign Subsidiaries Commitments and contingencies disclosure. Commitments and contingencies disclosure. Commitments And Contingencies Disclosure [Table] Commitments And Contingencies Disclosure [Table] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving lines of credit Revolving Credit Facility [Member] Construction of auto dealerships. Construction of auto dealerships Construction Of Auto Dealerships [Member] Commitments And Contingencies Disclosure [Line Items] Commitments And Contingencies Disclosure [Line Items] Lease expense Operating Leases Rent Expense Net Unused portion of commercial lending committed to dealers, in the form of lines of credit. Remaining unfunded amount of commercial lending committed to dealers, in the form of construction loans. Unused balance of commercial revolving lines of credit Loans And Leases Receivable Commitments Unused Portion Of Lines Of Credit Remaining unfunded balance for construction loans Loans And Leases Receivable Commitments Remaining Unfunded Amount Of Construction Loans Asset-backed securitization notes issued during period. Initial receivable principal balance underlying asset-backed securitization notes issued during period. Asset-backed securitization notes issued during period Secured Debt Gross Issued Initial receivable principal balance underlying asset-backed securitization notes issued during period Secured Debt Gross Issued Initial Receivable Balance Secured debt at the gross amount related to asset-backed securitizations. Text Block [Abstract] Schedule Of Variable Interest Entities [Table] Schedule Of Variable Interest Entities [Table] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Assets: Unamortized costs and subsidy income, net Unamortized Cost And Subsidy Income Net Restricted cash Restricted Cash And Cash Equivalents Accrued interest receivable Interest Receivable Liabilities: Liabilities [Abstract] Secured debt Secured Debt Gross Unamortized discounts and fees Debt Instrument Unamortized Discount Secured debt, net Cash collections on receivables underlying asset-backed securitization notes, which were required to be remitted to the trusts. Cash to be remitted to trusts Cash To Be Remitted To Trust Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] Interest receivable and other assets Interest Receivable And Other Assets Other receivables Other Receivables Deferred expense Deferred Costs And Other Assets Software, net of accumulated amortization of $141 and $138 as of June 30, 2017 and March 31, 2017, respectively Finite Lived Intangible Assets Net Property and equipment, net of accumulated depreciation of $18 and $17 as of June 30, 2017 and March 31, 2017, respectively Property Plant And Equipment Net Other miscellaneous assets Other Assets Miscellaneous Total Software, Accumulated amortization Finite Lived Intangible Assets Accumulated Amortization Property and equipment, Accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Other assets. Other assets. Other Assets [Table] Other Assets [Table] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] General and administrative expenses General And Administrative Expense [Member] Other Assets [Line Items] Other Assets [Line Items] Assets estimated useful life Property Plant And Equipment Useful Life Dealer payables primarily relate to settlements on loan/lease acquisitions. The current and noncurrent portions of the amount recognized for uncertain tax positions as of the balance sheet date. Accrued Liabilities And Other Liabilities [Abstract] Dealer payables Dealer Payables Accounts payable and accrued expenses Accounts Payable And Accrued Liabilities Current And Noncurrent Lease security deposits Security Deposit Liability Unearned income, operating lease Deferred Revenue Leases Net Uncertain tax positions Liability For Uncertain Tax Positions Other liabilities Other Sundry Liabilities Total Other income: VSC administration Other, net Other Operating Income Expense Net Total Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Hierarchy Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy Fair Value Measurements Fair Value Hierarchy [Domain] Level 1 Fair Value Inputs Level1 [Member] Level 2 Fair Value Inputs Level2 [Member] Level 3 Fair Value Inputs Level3 [Member] 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] Derivative instruments: Derivative Instrument Detail [Abstract] Assets measured at fair value Assets Fair Value Disclosure Recurring Liabilities measured at fair value Liabilities Fair Value Disclosure Recurring Measurement Frequency Fair Value By Measurement Frequency [Axis] Fair Value, Measurement Frequency Fair Value Measurement Frequency [Domain] Nonrecurring Fair Value Measurements Nonrecurring [Member] Measurement Basis Fair Value By Measurement Basis [Axis] Fair Value Disclosure Item Amounts [Default] Portion At Fair Value Fair Value Disclosure [Member] Fair Value Measurement Fair Value Disclosure Item Amounts [Domain] Lower-of-cost or fair value adjustment Change During Period Fair Value Disclosure [Member] Vehicles held for disposition Assets Held For Sale Long Lived Fair Value Disclosure Lower-of-cost or fair value adjustment to vehicles held for disposition Assets Fair Value Adjustment Net dealer loan balances as reported in the balance sheet, for purposes of fair value footnote disclosure, including the fair value amounts. Net retail loan balances as reported in the balance sheet, for purposes of fair value footnote disclosure, including the fair value amounts. The fair value amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element. 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. Fair value amount as of the balance sheet date of obligations due all related parties. 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. 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. Fair Value By Balance Sheet Grouping [Table] Fair Value By Balance Sheet Grouping [Table] Fair value Estimate Of Fair Value Fair Value Disclosure [Member] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Cash and cash equivalents Cash And Cash Equivalents Fair Value Disclosure Dealer loans, net Dealer Loans Net Fair Value Disclosure Retail loans, net Retail Loans Net Fair Value Disclosure Restricted cash Restricted Cash And Cash Equivalents Fair Value Disclosure Commercial paper Commercial Paper Fair Value Disclosure Related party debt Due To Related Parties Current And Noncurrent Fair Value Disclosure Bank loans Loans Payable Fair Value Disclosure Medium term note programs Notes Payable Fair Value Disclosure Other debt Other Long Term Debt Fair Value Disclosure Secured debt Secured Debt Fair Value Disclosure Net dealer loan balances as reported in the balance sheet at the carrying value amounts, for purposes of fair value footnote disclosure. Net retail loan balances as reported in the balance sheet at the carrying value amounts, for purposes of fair value footnote disclosure. Dealer loans, net Dealer Loans Net Retail loans, net Retail Loans Net Commercial paper Commercial Paper Bank loans Loans Payable To Bank Medium term note programs Medium Term Notes Other debt Other Long Term Debt Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] United states segment. United States United States Segment [Member] Canada segment. Canada Canada Segment [Member] Consolidation Items Consolidation Items [Axis] Consolidation Items Consolidation Items [Domain] Operating Segments Operating Segments [Member] Valuation adjustments and reclassifications Material Reconciling Items [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Realized (gains)/losses on derivatives and foreign currency denominated debt Realized Gain Loss On Derivatives And Foreign Currency Denominated Debt (Gain)/Loss on derivative instruments (Gain)/Loss on foreign currency revaluation of debt Total assets