Employee benefit plans - Schedule of weighted-average assumptions used to determine PBO (Detail) |
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Employee Benefit Plans [Abstract] | ||
| Discount rate | 3.20% | 2.30% |
| Rate of increase in compensation levels | 0.40% | 0.50% |
| Interest crediting rate | 2.90% | 2.90% |
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- References No definition available.
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| X | ||||||||||
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average rate increase of compensation, used to determine benefit obligation 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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| X | ||||||||||
- Definition Weighted-average interest crediting rate used to determine benefit obligation 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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