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Short-term Financing (Description of Credit Facilities) (Parenthetical) (Details) - Revolving Credit Facility [Member] - USD ($)
$ in Millions
May 31, 2023
May 31, 2022
Line of Credit Facility [Line Items]    
Maximum Amount Available $ 2,000.0  
PNC Bank, National Association [Member] | PNC $250 Million Credit Facility [Member]    
Line of Credit Facility [Line Items]    
Weighted-average interest rate 5.83% 2.34%
Maximum Amount Available $ 250.0