Employee Retirement Plans - Summary of Defined Contribution Plan Expense (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 31, 2026 |
May 31, 2025 |
May 31, 2024 |
|
| Defined Contribution Plan [Abstract] | |||
| Defined contribution plan expense | $ 13.0 | $ 12.4 | $ 12.3 |