Annual report [Section 13 and 15(d), not S-K Item 405]

Employee Benefit Plans - Weighted Average Actuarial Assumptions Used to Determine Net Pension Cost (Detail)

v3.25.1
Employee Benefit Plans - Weighted Average Actuarial Assumptions Used to Determine Net Pension Cost (Detail) - Pension Plans, Defined Benefit [Member]
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 5.27% 5.03% 3.66%
Rate of increase in compensation levels 3.00% 3.00% 3.00%
Long-term rate of return on plan assets 5.75% 5.75% 5.50%