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Stock-Based Compensation - Additional Information (Detail) ¥ in Millions | 12 Months Ended
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Mar. 31, 2023 JPY (¥) Point | Mar. 31, 2022 JPY (¥) | Mar. 31, 2021 JPY (¥)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Points settled for individuals retired | 59,416 |  |
Points outstanding | 2,273,956 |  |
Stock Compensation Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Points granted | 467,124 |  |
Stock-based compensation costs recognized | ¥ | ¥ 937 | ¥ 1,191 | ¥ 885

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- Definition Share Based Compensation Arrangement By Share Based Payment Award Points Settled In Period + References No definition available. + Details
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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