Deferred compensation awards - Activity relating to RSU (Detail) - RSU [Member] - ¥ / shares |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Outstanding | ||
| Outstanding (number of shares), Beginning | 136,203,210 | |
| Outstanding (number of shares), Granted | 62,190,310 | |
| Outstanding (number of shares), Forfeited | (6,206,885) | |
| Outstanding (number of shares), Delivered | (66,303,810) | |
| Outstanding (number of shares), Ending | 125,882,825 | 136,203,210 |
| Weighted-Average grant date fair value per share | ||
| Weighted-average grant date fair value per share, Beginning | ¥ 598 | |
| Weighted-average grant date fair value per share, Granted | 811 | |
| Weighted-average grant date fair value per share, Forfeited | 680 | |
| Weighted-average grant date fair value per share, Delivered | 598 | |
| Weighted-average grant date fair value per share, Ending | ¥ 699 | ¥ 598 |
| Weighted-average remaining life until expiry (years) | ||
| Weighted-average remaining life until expiry (years), Outstanding | 1 year | 10 months 24 days |
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- Definition Weighted average fair value as of the grant date of the shares paid. No definition available.
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- References No definition available.
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Gross number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The addition or reduction in the number of reserved shares that could potentially be issued under the option plan attributable to reasons other than grants, exercises, forfeitures, and expirations during the reporting period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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