Leases (Supplemental Cash Flow Information Related to Leases) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
May 31, 2024 |
May 31, 2026 |
May 31, 2025 |
May 31, 2024 |
|
| Leases [Abstract] | ||||
| Cash paid for amounts included in the measurement of lease liabilities | $ 23.7 | $ 24.9 | $ 20.9 | |
| Amortization of ROU assets | $ 9.7 | 16.0 | 14.0 | 25.8 |
| ROU assets obtained in exchange for new operating lease liabilities | 21.6 | 32.0 | 7.2 | |
| Lease incentives received in the form of tenant allowances and free rent | $ 0.4 | $ 0.6 | $ 0.8 | |