Leases - Lessor: Lease Income (Parenthetical) (Detail) - JPY (¥) ¥ in Millions |
6 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Lessor, Lease, Description [Line Items] | ||
| Gains on sales of operating lease assets | ¥ 35,152 | ¥ 31,005 |
| Real estate asset [member] | ||
| Lessor, Lease, Description [Line Items] | ||
| Gains on sales of operating lease assets | 8,158 | 10,049 |
| Operating lease assets other than real estate [member] | ||
| Lessor, Lease, Description [Line Items] | ||
| Gains on sales of operating lease assets | ¥ 26,994 | ¥ 20,956 |