Income Taxes (Narrative) (Details)  | 
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Feb. 28, 2021  | 
Feb. 29, 2020  | 
Feb. 28, 2021  | 
Feb. 29, 2020  | 
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| Income Taxes [Abstract] | ||||
| Effective income tax rate | 24.20% | 23.60% | 23.30% | 23.40% | 
| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- References No definition available. 
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