Other Assets - Summary of Other Assets (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Miscellaneous assets [abstract] | ||||
| Prepaid expenses | ¥ 186,383 | ¥ 157,925 | ||
| Accrued income | 922,193 | 877,090 | ||
| Receivables from brokers, dealers and customers for securities transactions | 6,811,641 | 3,290,628 | ||
| Cash collateral provided for derivative and other financial transactions | 2,348,950 | 1,856,606 | ||
| Retirement benefit assets | 629,301 | 513,068 | ||
| Security deposits | 77,916 | 80,575 | ||
| Assets held for sale | [1] | 728,576 | ||
| Others | 1,360,977 | 1,208,080 | ||
| Total other assets | ¥ 13,065,937 | ¥ 7,983,972 | ||
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- Definition The amount of assets representing income that has been earned but is not yet a receivable, including contract assets. [Refer: Contract assets] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition The amount of non-current assets or disposal groups classified as held for sale. [Refer: Disposal groups classified as held for sale [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of assets that the entity does not separately disclose in the same statement or note. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Receivables that represent amounts paid for goods and services before they have been delivered. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The balance of cash collateral provided for derivative and other financial transactions. No definition available.
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- Definition Other miscellaneous assets. No definition available.
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- Definition The balance of receivables from brokers, dealers and customers for securities transactions. No definition available.
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- Definition The amount of security deposits. No definition available.
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