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CREDIT ARRANGEMENTS (Long-term Debt) (Details) - USD ($)
$ in Thousands
Aug. 31, 2024
Aug. 31, 2023
Feb. 28, 2022
Jan. 31, 2022
Feb. 28, 2021
Debt Instrument [Line Items]          
Total long-term debt including current maturities $ 1,198,241 $ 1,164,991      
Less debt issuance costs (13,073) (14,840)   $ (9,400)  
Plus unamortized bond premium 4,453 4,646      
Total amounts outstanding 1,189,621 1,154,797      
Less current maturities of long-term debt and short-term borrowings (38,786) (40,513)      
Long-term debt $ 1,150,835 $ 1,114,284      
Finance leases, weighted average discount rate   4.926%      
Short-term debt, weighted average interest rate 6.79% 780.00%      
$300 million notes at 4.125% due February 2030          
Debt Instrument [Line Items]          
Weighted average interest rate 4.125%     4.125%  
Total long-term debt including current maturities $ 300,000 $ 300,000   $ 300,000  
2031 Notes          
Debt Instrument [Line Items]          
Weighted average interest rate 3.875%       3.875%
Total long-term debt including current maturities $ 300,000 300,000     $ 300,000
2032 Notes          
Debt Instrument [Line Items]          
Weighted average interest rate 4.375%     4.375%  
Total long-term debt including current maturities $ 300,000 300,000   $ 300,000  
Series 2022 Bonds, due 2047          
Debt Instrument [Line Items]          
Weighted average interest rate 4.00%   4.00%    
Total long-term debt including current maturities $ 145,060 145,060      
Less debt issuance costs     $ (3,100)    
Short-term borrowings          
Debt Instrument [Line Items]          
Total long-term debt including current maturities $ 0 8,419      
Other          
Debt Instrument [Line Items]          
Weighted average interest rate 5.10%        
Total long-term debt including current maturities $ 11,910 16,042      
Finance leases          
Debt Instrument [Line Items]          
Total long-term debt including current maturities $ 141,271 $ 95,470      
Finance leases, weighted average discount rate 5.134%