CREDIT ARRANGEMENTS (Narrative) (Details)		1 Months Ended		3 Months Ended		9 Months Ended
	May 31, 2022 USD ($)	Feb. 28, 2022 USD ($)	Jan. 31, 2022 USD ($)	May 31, 2022 USD ($)	May 31, 2021 USD ($)	May 31, 2022 USD ($)	May 31, 2021 USD ($)	May 31, 2022 PLN (zł)	Aug. 31, 2021 USD ($)	Aug. 31, 2021 PLN (zł)	Mar. 31, 2021 USD ($)	Jul. 31, 2017 USD ($)
Debt Instrument [Line Items]
Less debt issuance costs	$ 17,043,000		$ 9,400,000	$ 17,043,000		$ 17,043,000			$ 8,141,000
Payments to acquire assets			7,500,000
Financial liabilities	1,550,726,000			1,550,726,000		1,550,726,000			1,077,922,000
Loss on debt extinguishment				(39,000)	$ 0	(16,091,000)	$ (16,841,000)
CMCP
Debt Instrument [Line Items]
Revolving credit facility, amount drawn	0			0		0			0
Revolving credit facility current borrowing capacity	70,300,000			70,300,000		70,300,000		zł 300,000,000	78,300,000
Poland Program
Debt Instrument [Line Items]
Transfer of accounts receivable program limit	67,500,000			67,500,000		67,500,000		288,000,000
Advances outstanding under transfer of receivables programs	62,600,000			62,600,000		62,600,000		zł 267,400,000	26,600,000	zł 101,700,000
Revolving credit facility | Credit Agreement Maturing March 2026
Debt Instrument [Line Items]
Revolving credit facility, amount drawn	0			0		0			0
Revolving credit facility current borrowing capacity											$ 400,000,000
Stand-by letters of credit
Debt Instrument [Line Items]
Stand by letters of credit outstanding amount	$ 1,400,000			$ 1,400,000		$ 1,400,000			3,000,000
2030 Notes
Debt Instrument [Line Items]
Face amount of debt			$ 300,000,000
Weighted average interest rate	4.125%		4.125%	4.125%		4.125%		4.125%
Financial liabilities	$ 300,000,000			$ 300,000,000		$ 300,000,000			0
2032 Notes
Debt Instrument [Line Items]
Face amount of debt			$ 300,000,000
Weighted average interest rate	4.375%		4.375%	4.375%		4.375%		4.375%
Financial liabilities	$ 300,000,000			$ 300,000,000		$ 300,000,000			0
2027 Notes
Debt Instrument [Line Items]
Face amount of debt												$ 300,000,000
Weighted average interest rate	5.375%			5.375%		5.375%		5.375%				5.375%
Financial liabilities	$ 0			$ 0		$ 0			300,000,000
Loss on debt extinguishment						$ (16,100,000)
Series 2022 Bonds, due 2047
Debt Instrument [Line Items]
Face amount of debt		$ 145,100,000
Weighted average interest rate	4.00%			4.00%		4.00%		4.00%
Less debt issuance costs	$ 3,100,000			$ 3,100,000		$ 3,100,000
Yield		3.50%
Proceeds from issuance	58,000,000	$ 150,000,000
Financial liabilities	145,060,000			145,060,000		145,060,000			0
Poland Term Loan | CMCP
Debt Instrument [Line Items]
Stand by letters of credit outstanding amount	900,000			900,000		900,000			5,700,000
Financial liabilities	$ 37,900,000			$ 37,900,000		$ 37,900,000		zł 161,900,000	49,700,000	zł 190,500,000
Poland Term Loan | Revolving credit facility
Debt Instrument [Line Items]
Weighted average interest rate	7.89%			7.89%		7.89%		7.89%
Financial liabilities	$ 37,923,000			$ 37,923,000		$ 37,923,000			49,726,000
2023 Notes
Debt Instrument [Line Items]
Face amount of debt	$ 330,000,000			$ 330,000,000		$ 330,000,000
Weighted average interest rate	4.875%			4.875%		4.875%		4.875%
Financial liabilities	$ 330,000,000			$ 330,000,000		$ 330,000,000			$ 330,000,000