Related Parties - Major Consolidated Subsidiaries (Detail)
|
12 Months Ended |
Mar. 31, 2026 |
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| Honda R&D Co., Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda R&D Co., Ltd.
|
| Country of Incorporation |
Japan
|
| Function |
Research & Development
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Finance Co., Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Finance Co., Ltd.
|
| Country of Incorporation |
Japan
|
| Function |
Finance
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| American Honda Motor Co., Inc. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
American Honda Motor Co., Inc.
|
| Country of Incorporation |
U.S.A.
|
| Function |
Coordination of Subsidiaries Operation, Research & Development, Manufacturing and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| American Honda Finance Corporation [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
American Honda Finance Corporation
|
| Country of Incorporation |
U.S.A.
|
| Function |
Finance
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Development and Manufacturing of America, LLC [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Development and Manufacturing of America, LLC
|
| Country of Incorporation |
U.S.A.
|
| Function |
Research & Development and Manufacturing
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Canada Inc. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Canada Inc.
|
| Country of Incorporation |
Canada
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Canada Finance Inc. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Canada Finance Inc.
|
| Country of Incorporation |
Canada
|
| Function |
Finance
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda de Mexico, S.A. de C.V. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda de Mexico, S.A. de C.V.
|
| Country of Incorporation |
Mexico
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Motor Europe Limited [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Motor Europe Limited
|
| Country of Incorporation |
U.K.
|
| Function |
Coordination of Subsidiaries Operation and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Finance Europe plc [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Finance Europe plc
|
| Country of Incorporation |
U.K.
|
| Function |
Finance
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Motor (China) Investment Co., Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Motor (China) Investment Co., Ltd.
|
| Country of Incorporation |
China
|
| Function |
Coordination of Subsidiaries Operation
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Auto Parts Manufacturing Co., Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Auto Parts Manufacturing Co., Ltd.
|
| Country of Incorporation |
China
|
| Function |
Manufacturing
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Motorcycle & Scooter India (Private) Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Motorcycle & Scooter India (Private) Ltd.
|
| Country of Incorporation |
India
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Cars India Limited [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Cars India Limited
|
| Country of Incorporation |
India
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| P.T. Honda Prospect Motor [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
P.T. Honda Prospect Motor
|
| Country of Incorporation |
Indonesia
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
51.00%
|
| Percentage Voting Interest |
51.00%
|
| Honda Malaysia Sdn Bhd [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Malaysia Sdn Bhd
|
| Country of Incorporation |
Malaysia
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
51.00%
|
| Percentage Voting Interest |
51.00%
|
| Asian Honda Motor Co., Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Asian Honda Motor Co., Ltd.
|
| Country of Incorporation |
Thailand
|
| Function |
Coordination of Subsidiaries Operation and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Automobile (Thailand) Co., Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Automobile (Thailand) Co., Ltd.
|
| Country of Incorporation |
Thailand
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
89.00%
|
| Percentage Voting Interest |
89.00%
|
| Thai Honda Co., Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Thai Honda Co., Ltd.
|
| Country of Incorporation |
Thailand
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
72.50%
|
| Percentage Voting Interest |
72.50%
|
| Honda Vietnam Co., Ltd. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Vietnam Co., Ltd.
|
| Country of Incorporation |
Vietnam
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
70.00%
|
| Percentage Voting Interest |
70.00%
|
| Honda South America Ltda. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda South America Ltda.
|
| Country of Incorporation |
Brazil
|
| Function |
Coordination of Subsidiaries Operation
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Moto Honda da Amazonia Ltda. [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Moto Honda da Amazonia Ltda.
|
| Country of Incorporation |
Brazil
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Honda Automoveis do Brazil Ltda. [Member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Honda Automoveis do Brazil Ltda.
|
| Country of Incorporation |
Brazil
|
| Function |
Manufacturing and Sales
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|
| Banco Honda SA [member] |
|
| Disclosure of subsidiaries [line items] |
|
| Company |
Banco Honda S.A
|
| Country of Incorporation |
Brazil
|
| Function |
Finance
|
| Percentage Ownership |
100.00%
|
| Percentage Voting Interest |
100.00%
|