Document and Entity Information - shares	9 Months Ended
Dec. 31, 2025	Jan. 31, 2026
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2025
Document Transition Report	false
Entity File Number	001-36111
Entity Registrant Name	AMERICAN HONDA FINANCE CORPORATION
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	95-3472715
Entity Address, Address Line One	1919 Torrance Blvd.
Entity Address, City or Town	Torrance
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90501
City Area Code	310
Local Phone Number	972-2288
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		13,660,000
Amendment Flag	false
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000864270
Current Fiscal Year End Date	--03-31
0.750% Medium-Term Notes, Series A Due November 25, 2026
Entity Information [Line Items]
Title of 12(b) Security	0.750% Medium-Term Notes, Series A Due November 25, 2026
Trading Symbol	HMC/26A
Security Exchange Name	NYSE
3.500% Medium-Term Notes, Series A Due April 24, 2026
Entity Information [Line Items]
Title of 12(b) Security	3.500% Medium-Term Notes, Series A Due April 24, 2026
Trading Symbol	HMC/26F
Security Exchange Name	NYSE
Floating Rate Medium-Term Notes, Series A Due April 29, 2026
Entity Information [Line Items]
Title of 12(b) Security	Floating Rate Medium-Term Notes, Series A Due April 29, 2026
Trading Symbol	HMC/26G
Security Exchange Name	NYSE
Floating Rate Medium-Term Notes, Series A Due May 29, 2026
Entity Information [Line Items]
Title of 12(b) Security	Floating Rate Medium-Term Notes, Series A Due May 29, 2026
Trading Symbol	HMC/26I
Security Exchange Name	NYSE
1.500% Medium-Term Notes, Series A Due October 19, 2027
Entity Information [Line Items]
Title of 12(b) Security	1.500% Medium-Term Notes, Series A Due October 19, 2027
Trading Symbol	HMC/27A
Security Exchange Name	NYSE
3.750% Medium-Term Notes, Series A Due October 25, 2027
Entity Information [Line Items]
Title of 12(b) Security	3.750% Medium-Term Notes, Series A Due October 25, 2027
Trading Symbol	HMC/27B
Security Exchange Name	NYSE
Floating Rate Medium-Term Notes, Series A Due May 28, 2027
Entity Information [Line Items]
Title of 12(b) Security	Floating Rate Medium-Term Notes, Series A Due May 28, 2027
Trading Symbol	HMC/27F
Security Exchange Name	NYSE
0.300% Medium-Term Notes, Series A Due July 7, 2028
Entity Information [Line Items]
Title of 12(b) Security	0.300% Medium-Term Notes, Series A Due July 7, 2028
Trading Symbol	HMC/28A
Security Exchange Name	NYSE
2.850% Medium-Term Notes, Series A Due June 27, 2028
Entity Information [Line Items]
Title of 12(b) Security	2.850% Medium-Term Notes, Series A Due June 27, 2028
Trading Symbol	HMC/28G
Security Exchange Name	NYSE
3.300% Medium-Term Notes, Series A Due March 21, 2029
Entity Information [Line Items]
Title of 12(b) Security	3.300% Medium-Term Notes, Series A Due March 21, 2029
Trading Symbol	HMC/29C
Security Exchange Name	NYSE
5.600% Medium-Term Notes, Series A Due September 6, 2030
Entity Information [Line Items]
Title of 12(b) Security	5.600% Medium-Term Notes, Series A Due September 6, 2030
Trading Symbol	HMC/30A
Security Exchange Name	NYSE
3.650% Medium-Term Notes, Series A Due April 23, 2031
Entity Information [Line Items]
Title of 12(b) Security	3.650% Medium-Term Notes, Series A Due April 23, 2031
Trading Symbol	HMC/31B
Security Exchange Name	NYSE
3.500% Medium-Term Notes, Series A Due June 27, 2031
Entity Information [Line Items]
Title of 12(b) Security	3.500% Medium-Term Notes, Series A Due June 27, 2031
Trading Symbol	HMC/31D
Security Exchange Name	NYSE
5.050% Medium-Term Notes, Series A Due August 20, 2031
Entity Information [Line Items]
Title of 12(b) Security	5.050% Medium-Term Notes, Series A Due August 20, 2031
Trading Symbol	HMC/31E
Security Exchange Name	NYSE
3.950% Medium-Term Notes, Series A Due March 19, 2032
Entity Information [Line Items]
Title of 12(b) Security	3.950% Medium-Term Notes, Series A Due March 19, 2032
Trading Symbol	HMC/32
Security Exchange Name	NYSE

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Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.

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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

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The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.

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Indicates that the company is a Smaller Reporting Company (SRC).

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The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

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Local phone number for entity.

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Title of a 12(b) registered security.

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Name of the Exchange on which a security is registered.

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