Employee Benefits - Significant Actuarial Assumptions Used to Determine Present Value of Defined Benefit Obligations (Detail) |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Japanese plans [member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Discount rate | 3.10% | 2.30% |
| Rate of salary increase | 1.60% | 1.60% |
| Foreign plans [member] | Bottom of range [member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Discount rate | 4.80% | 4.60% |
| Rate of salary increase | 2.00% | 2.00% |
| Foreign plans [member] | Top of range [member] | ||
| Disclosure of defined benefit plans [line items] | ||
| Discount rate | 6.20% | 5.90% |
| Rate of salary increase | 3.50% | 4.90% |