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CREDIT ARRANGEMENTS (Narrative) (Details)	6 Months Ended
	Feb. 28, 2019 USD ($)	Feb. 28, 2019 PLN (zł)	Aug. 31, 2018 USD ($)	Jul. 31, 2017 USD ($)	May 31, 2013 USD ($)
CMCP
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity	$ 59,448,319.5941661	zł 225,000,000
Revolving credit facility, amount drawn	0		$ 0
Stand by letters of credit outstanding amount	1,100,000		1,100,000
Revolving credit facility
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity	350,000,000
Revolving credit facility, maximum borrowing capacity	600,000,000
Revolving credit facility, amount drawn	$ 0		0
Minimum interest coverage ratio	2.50
Maximum debt to capitalization ratio	0.60
Actual interest coverage ratio	5.41	5.41
Actual debt to capitalization ratio	0.48	0.48
Stand-by letters of credit
Debt Instrument [Line Items]
Revolving credit facility current borrowing capacity	$ 50,000,000
Stand by letters of credit outstanding amount	$ 3,300,000		3,300,000
U.S. Program
Debt Instrument [Line Items]
Weighted average interest rate	3.497%	3.497%
Transfer of accounts receivable program limit	$ 200,000,000.0
U.S. Program with Consent of CMCRV and Program Administrative Agent
Debt Instrument [Line Items]
Transfer of accounts receivable program limit	300,000,000.0
Advances outstanding under transfer of receivables programs	$ 25,000,000
Poland Program
Debt Instrument [Line Items]
Weighted average interest rate	2.41%	2.41%
Transfer of accounts receivable program limit	$ 58,127,245.8254069	zł 220,000,000
Advance limit as percent of eligible trade accounts receivable transferred (percent)	90.00%	90.00%
Advances outstanding under transfer of receivables programs	$ 34,500,000		$ 12,100,000
2027 Notes
Debt Instrument [Line Items]
Debt instrument, face amount				$ 300,000,000
Weighted average interest rate	5.375%	5.375%		5.375%
2026 Notes
Debt Instrument [Line Items]
Debt instrument, face amount	$ 350,000,000
Weighted average interest rate	5.75%	5.75%
2023 Notes
Debt Instrument [Line Items]
Debt instrument, face amount					$ 330,000,000
Weighted average interest rate	4.875%	4.875%			4.875%
Term Loans | Revolving credit facility
Debt Instrument [Line Items]
Weighted average interest rate	4.236%	4.236%
Periodic payments, as percent of original principal amount (percent)	1.25%
Term Loans | 2022 Term Loan | Revolving credit facility
Debt Instrument [Line Items]
Debt instrument, face amount	$ 150,000,000
Term Loans | 2018 Term Loan | Revolving credit facility
Debt Instrument [Line Items]
Debt instrument, face amount	$ 180,000,000.0

X

- Definition

Advance Limit as Percent of Eligible Trade Accounts Receivable Transferred

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- Definition

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- Definition

Periodic Payments, as Percent of Original Principal Amount

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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- Definition

Fair value of the amount outstanding under the credit facility.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

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