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Leases - Lessee: Supplemental Balance Sheet Information (Detail) - JPY (¥) ¥ in Millions | Mar. 31, 2023 | Mar. 31, 2022
--- | --- | ---
Operating And Finance Lease Supplemental Balance Sheet Information [Line Items] |  |
Right-of-use asset (operating leases) | ¥ 279,415 | ¥ 275,093
Operating lease, Other Liabilities | 280,829 | 275,199
Operating lease, Total lease liabilities | ¥ 280,829 | ¥ 275,199
Operating lease, Weighted average remaining lease term | 11 years | 11 years
Operating lease, Weighted average discount rate | 1.30% | 1.10%
Right-of-use asset (finance leases) | ¥ 6,544 | ¥ 7,093
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Net Investment in Lease, before Allowance for Credit Loss | Net Investment in Lease, before Allowance for Credit Loss
Finance leases, Other Liability | ¥ 7,129 | ¥ 7,698
Finance leases, Total lease liabilities | ¥ 7,129 | ¥ 7,698
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] | Liabilities | Liabilities
Finance leases, Weighted average remaining lease term | 37 years | 25 years
Finance leases, Weighted average discount rate | 2.40% | 2.50%
Operating Lease, Liability, Statement of Financial Position [Extensible List] | Liabilities | Liabilities
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Other Assets | Other Assets
Investment in Operating Leases |  |
Operating And Finance Lease Supplemental Balance Sheet Information [Line Items] |  |
Right-of-use asset (operating leases) | ¥ 93,635 | ¥ 102,787
Right-of-use asset (finance leases) | 4,782 | 4,955
Property under Facility Operations |  |
Operating And Finance Lease Supplemental Balance Sheet Information [Line Items] |  |
Right-of-use asset (operating leases) | 85,036 | 68,149
Right-of-use asset (finance leases) | 1,394 | 1,763
Office Facilities |  |
Operating And Finance Lease Supplemental Balance Sheet Information [Line Items] |  |
Right-of-use asset (operating leases) | 100,744 | 104,157
Right-of-use asset (finance leases) | ¥ 368 | ¥ 375

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- Definition Indicates line item in statement of financial position that includes finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918631-209977 + Details
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- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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