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CREDIT ARRANGEMENTS (Narrative) (Details) zł in Millions | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 28, 2022 USD ($) | Aug. 31, 2024 USD ($) | Aug. 31, 2023 USD ($) | Aug. 31, 2022 USD ($) | Aug. 31, 2023 PLN (zł) | Jan. 31, 2022 USD ($) | Feb. 28, 2021 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total long-term debt including current maturities |  | $ 1,198,241,000 | $ 1,164,991,000 |  |  |  |
Less debt issuance costs |  | 13,073,000 | 14,840,000 |  |  | $ 9,400,000 |
Interest costs capitalized |  | 5,400,000 | 21,500,000 | $ 11,900,000 |  |  |
CMCP |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  | 154,800,000 | 145,400,000 |  | zł 600.0 |  |
Revolving credit agreement |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  | 850,000,000.0 |  |  |  |  |
Revolving line of credit outstanding amount |  | $ 0 | 0 |  |  |  |
Minimum interest coverage ratio |  | 2.50 |  |  |  |  |
Maximum debt to capitalization ratio |  | 0.60 |  |  |  |  |
Actual interest coverage ratio |  | 20.37 |  |  |  |  |
Actual debt to capitalization ratio |  | 0.22 |  |  |  |  |
Stand-by letters of credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 50,000,000.0 |  |  |  |  |
Stand by letters of credit outstanding amount |  | 900,000 |  |  |  |  |
Standby Letters of Credit | CMCP |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Stand by letters of credit outstanding amount |  | 2,400,000 | 16,300,000 |  |  |  |
$300 million notes at 4.125% due February 2030 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total long-term debt including current maturities |  | $ 300,000,000 | 300,000,000 |  |  | $ 300,000,000 |
Weighted average interest rate |  | 4.125% |  |  |  | 4.125% |
2032 Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total long-term debt including current maturities |  | $ 300,000,000 | 300,000,000 |  |  | $ 300,000,000 |
Weighted average interest rate |  | 4.375% |  |  |  | 4.375% |
$300 million notes at 3.875% due February 2031 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total long-term debt including current maturities |  | $ 300,000,000 | 300,000,000 |  |  |  | $ 300,000,000
Weighted average interest rate |  | 3.875% |  |  |  |  | 3.875%
2026 Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total long-term debt including current maturities |  |  |  |  |  |  | $ 350,000,000
Weighted average interest rate |  |  |  |  |  |  | 5.75%
Series 2022 Bonds, due 2047 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Total long-term debt including current maturities |  | $ 145,060,000 | 145,060,000 |  |  |  |
Weighted average interest rate | 4.00% | 4.00% |  |  |  |  |
Less debt issuance costs | $ 3,100,000 |  |  |  |  |  |
Term loan, maximum principal amount | $ 145,100,000 |  |  |  |  |  |
Bonds, effective yield (interest rate) | 0.035 |  |  |  |  |  |
Proceeds from issuance of debt | $ 150,000,000 |  |  |  |  |  |
Credit Agreement Maturing March 2026 | Revolving credit agreement |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 600,000,000.0 |  |  |  |  |
Delayed Draw Senior Secured Term Loan Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  | 200,000,000 |  |  |  |  |
Poland Program |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Transfer of Accounts Receivable Program, Face Amount |  | $ 74,300,000 | 69,800,000 |  | 288.0 |  |
Transfers of Accounts Receivable Outstanding |  |  | $ 8,400,000 |  | zł 34.7 |  |

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