Equity - Additional Information (Detail) ¥ in Millions |
12 Months Ended |
|---|---|
|
Mar. 31, 2026
JPY (¥)
| |
| Disclosure of classes of share capital [line items] | |
| Percentage of cash dividends from retained earnings shall be appropriated as a capital reserve | 10.00% |
| Percentage of capital reserve and legal reserve to common stock | 25.00% |
| Honda's Equity In Undistributed Earnings, Affiliates And Joint Ventures, Retained Earnings | ¥ 293,864 |
| Bottom of range [member] | |
| Disclosure of classes of share capital [line items] | |
| Minimum percentage of paid-in amount or proceeds of issuance of shares allowed to be incorporated in common stock | 50.00% |