Other Income, Net (Schedule of Other Income, Net) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Feb. 28, 2026 |
Feb. 28, 2025 |
Feb. 28, 2026 |
Feb. 28, 2025 |
|
| Other Income and Expenses [Abstract] | ||||
| Interest income on corporate investments | $ 15.2 | $ 16.6 | $ 50.4 | $ 52.3 |
| Other | (0.1) | (0.0) | 5.3 | (0.6) |
| Other income, net | $ 15.1 | $ 16.6 | $ 55.7 | $ 51.7 |
| X | ||||||||||
- Definition The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|