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FAIR VALUE (Financial Assets and Liabilities Not Required to Be Measured at Fair Value) (Details) - USD ($) $ in Thousands | May. 31, 2015 | Aug. 31, 2014
--- | --- | ---
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | $ 1,289,122 | $ 1,289,047
$400 million notes at 6.50% due July 2017 |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | 406,317 | 408,546
$400 million notes at 6.50% due July 2017 | Level 2 | Carrying Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | 406,317 | 408,546
$400 million notes at 6.50% due July 2017 | Level 2 | Fair Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [1] | 427,000 | 438,200
$500 million notes at 7.35% due August 2018 |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | 514,837 | 518,305
$500 million notes at 7.35% due August 2018 | Level 2 | Carrying Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | 514,837 | 518,305
$500 million notes at 7.35% due August 2018 | Level 2 | Fair Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [1] | 535,000 | 567,560
$330 million notes at 4.875% due May 2023 |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | 330,000 | 330,000
$330 million notes at 4.875% due May 2023 | Level 2 | Carrying Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities |  | 330,000 | 330,000
$330 million notes at 4.875% due May 2023 | Level 2 | Fair Value |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |
Financial liabilities | [1] | $ 318,302 | $ 325,050
[1] | The fair values of the 2017 Notes, 2018 Notes and 2023 Notes are estimated based on readily available market prices of these notes at May 31, 2015 and August 31, 2014, or similar notes with the same maturities, rating and interest rates.

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