Long-Term Financing (Information Related to Senior Notes) (Details) - Senior Notes [Member]	12 Months Ended
	May 31, 2024	May 31, 2023
Senior Notes, Series A [Member]
Debt Instrument [Line Items]
Stated interest rate	4.07%	4.07%
Effective interest rate	4.14%	4.14%
Interest rate type	Fixed	Fixed
Interest payment dates	Semi-annual, in arrears	Semi-annual, in arrears
Principal payment dates	Mar. 13, 2026	Mar. 13, 2026
Note type	Unsecured	Unsecured
Senior Notes, Series B [Member]
Debt Instrument [Line Items]
Stated interest rate	4.25%	4.25%
Effective interest rate	4.31%	4.31%
Interest rate type	Fixed	Fixed
Interest payment dates	Semi-annual, in arrears	Semi-annual, in arrears
Principal payment dates	Mar. 13, 2029	Mar. 13, 2029
Note type	Unsecured	Unsecured