Employee benefit plans - Weighted-average assumptions used to determine net periodic benefit costs (Detail) |
12 Months Ended | ||
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Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Employee Benefit Plans [Abstract] | |||
| Discount rate | 2.30% | 1.60% | 1.30% |
| Rate of increase in compensation levels | 0.50% | 0.50% | 0.40% |
| Expected long-term rate of return on plan assets | 2.60% | 2.60% | 2.60% |
| Interest crediting rate | 2.90% | 2.80% | 2.80% |
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- References No definition available.
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted-average interest crediting rate used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, cash balance and other defined benefit plans with promised interest crediting rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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