Share-based Payment - Significant Terms and Conditions of Stock Option Plan (Parenthetical) (Detail) - Maximum [member] |
12 Months Ended |
|---|---|
|
Mar. 31, 2026
yr
| |
| Disclosure of terms and conditions of share-based payment arrangement [Line Items] | |
| Term of options granted for director, a corporate auditor or an executive officer | 30 |
| Term of options granted for director, a corporate auditor or an executive officer who are relieved of their positions | 20 years |