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CREDIT ARRANGEMENTS (Long-term Debt, Including the Deferred Gain from the Termination of the Interest Rate Swaps) (Details) - USD ($) $ in Thousands	May 31, 2019	Aug. 31, 2018	Jul. 31, 2017	May 31, 2013
Debt Instrument [Line Items]
Total debt	$ 1,372,448	$ 1,170,129
Less debt issuance costs	10,690	11,764
Total amounts outstanding	1,361,758	1,158,365
Less current maturities	29,568	19,746
Less short-term borrowings	25,327	0
Current maturities of long-term debt and short-term borrowings	54,895	19,746
Long-term debt	$ 1,306,863	1,138,619
2027 Notes
Debt Instrument [Line Items]
Weighted average interest rate	5.375%		5.375%
2026 Notes
Debt Instrument [Line Items]
Weighted average interest rate	5.75%
2023 Notes
Debt Instrument [Line Items]
Weighted average interest rate	4.875%			4.875%
Other, including equipment notes
Debt Instrument [Line Items]
Total debt	$ 56,996	$ 47,629
Revolving credit facility | Term Loans
Debt Instrument [Line Items]
Weighted average interest rate	4.115%
U.S. Program | Short-term borrowings
Debt Instrument [Line Items]
Weighted average interest rate	3.12%
Poland Program | Short-term borrowings
Debt Instrument [Line Items]
Weighted average interest rate	2.41%

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