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CREDIT ARRANGEMENTS (Schedule of Long-term Debt) (Details) - USD ($)
$ in Thousands
Nov. 30, 2022
Aug. 31, 2022
May 31, 2013
Debt Instrument [Line Items]      
Total debt $ 1,344,078 $ 1,513,703  
Less debt issuance costs (16,317) (16,496)  
Total amounts outstanding 1,332,552 1,502,045  
Less current maturities of long-term debt (239,406) (388,796)  
Long-term debt $ 1,093,146 1,113,249  
2032 Notes      
Debt Instrument [Line Items]      
Weighted average interest rate 4.375%    
Total debt $ 300,000 300,000  
2031 Notes      
Debt Instrument [Line Items]      
Weighted average interest rate 3.875%    
Total debt $ 300,000 300,000  
2030 Notes      
Debt Instrument [Line Items]      
Weighted average interest rate 4.125%    
Total debt $ 300,000 300,000  
2023 Notes      
Debt Instrument [Line Items]      
Weighted average interest rate 4.875%   4.875%
Total debt $ 214,059 330,000  
Series 2022 Bonds, due 2047      
Debt Instrument [Line Items]      
Weighted average interest rate 4.00%    
Total debt $ 145,060 145,060  
Plus unamortized bond premium $ 4,791 4,838  
Poland Term Loan | Revolving credit facility      
Debt Instrument [Line Items]      
Weighted average interest rate 0.00%    
Total debt $ 0 32,439  
Short-term borrowings      
Debt Instrument [Line Items]      
Weighted average interest rate, short term 0.00%    
Total debt $ 0 26,390  
Other      
Debt Instrument [Line Items]      
Weighted average interest rate 4.55%    
Total debt $ 21,097 21,278  
Finance leases      
Debt Instrument [Line Items]      
Total debt $ 63,862 $ 58,536