SUBSEQUENT EVENTS	9 Months Ended
May 31, 2017
Subsequent Events [Abstract]
Subsequent Events	NOTE 16. SUBSEQUENT EVENTS On June 13, 2017, the Company announced its plan to exit its International Marketing and Distribution segment. As an initial step in this plan, on June 12, 2017, the Company entered into a definitive agreement to sell its raw materials trading business headquartered in the U.S. ("CMC Cometals"). The transaction is expected to close in the fourth quarter of fiscal 2017 and is subject to the satisfaction or waiver of customary closing conditions, including, without limitation, approval of regulatory authorities. The purchase agreement also contains customary representations, warranties, covenants, including covenants not to compete and non-solicitation covenants, indemnities and termination rights. In addition, the Company announced its plan to pursue a sale of its steel trading business headquartered in the U.S., as well as a restructuring and sale of the remaining trading operations located in Asia and Australia. CMC Cometals is expected to be classified in discontinued operations beginning in the fourth quarter of fiscal 2017. The remainder of the International Marketing and Distribution segment is expected to be classified in discontinued operations either upon meeting the criteria to be classified as held for sale or upon the wind-down of each operation. On June 23, 2017, the Company entered into a second amendment to its fourth amended and restated credit agreement (the “Amended Credit Agreement”), to, among other things, extend the maturity of the Credit Agreement to June 23, 2022 and provide for a senior secured term loan in the maximum principal amount of $150.0 million (the "Term Loan"). The Term Loan will mature in June 2022, will generally bear interest on the same terms and conditions of the Credit Agreement, and can be drawn upon only once during its term and only during the first 270 days of the term. The Company intends to use the proceeds of the Term Loan for general corporate purposes, including, without limitation, funding the repayment of the Company’s outstanding 2017 Notes. On June 23, 2017, the Company entered into a third amendment to the Amended Credit Agreement to further amend the Credit Agreement to permit, among other things, the disposal of the International Marketing and Distribution segment, as described above. On June 26, 2017, the Company announced a cash tender offer (the "Tender Offer") to purchase up to $300.0 million of its remaining $399.8 million of 7.35% Senior Notes due August 2018. The Tender Offer is expected to close in July 2017. In addition, the Company announced its plan to issue $300.0 million of Senior Notes due 2027 (the "2027 Notes"). The offering is expected to close in July 2017. The Company intends to use the net proceeds from the issuance of the 2027 Notes to fund the repurchase of a portion of the Company’s outstanding 2018 Notes in the Tender Offer and to redeem from available cash any remaining 2018 Notes that are not tendered following the Tender Offer's expiration, in each case together with accrued interest and expenses related thereto.

NOTE 16. SUBSEQUENT EVENTS

On June 13, 2017, the Company announced its plan to exit its International Marketing and Distribution segment. As an initial step in this plan, on June 12, 2017, the Company entered into a definitive agreement to sell its raw materials trading business headquartered in the U.S. ("CMC Cometals"). The transaction is expected to close in the fourth quarter of fiscal 2017 and is subject to the satisfaction or waiver of customary closing conditions, including, without limitation, approval of regulatory authorities. The purchase agreement also contains customary representations, warranties, covenants, including covenants not to compete and non-solicitation covenants, indemnities and termination rights. In addition, the Company announced its plan to pursue a sale of its steel trading business headquartered in the U.S., as well as a restructuring and sale of the remaining trading operations located in Asia and Australia. CMC Cometals is expected to be classified in discontinued operations beginning in the fourth quarter of fiscal 2017. The remainder of the International Marketing and Distribution segment is expected to be classified in discontinued operations either upon meeting the criteria to be classified as held for sale or upon the wind-down of each operation.

On June 23, 2017, the Company entered into a second amendment to its fourth amended and restated credit agreement (the “Amended Credit Agreement”), to, among other things, extend the maturity of the Credit Agreement to June 23, 2022 and provide for a senior secured term loan in the maximum principal amount of $150.0 million (the "Term Loan"). The Term Loan will mature in June 2022, will generally bear interest on the same terms and conditions of the Credit Agreement, and can be drawn upon only once during its term and only during the first 270 days of the term. The Company intends to use the proceeds of the Term Loan for general corporate purposes, including, without limitation, funding the repayment of the Company’s outstanding 2017 Notes.

On June 23, 2017, the Company entered into a third amendment to the Amended Credit Agreement to further amend the Credit Agreement to permit, among other things, the disposal of the International Marketing and Distribution segment, as described above.

On June 26, 2017, the Company announced a cash tender offer (the "Tender Offer") to purchase up to $300.0 million of its remaining $399.8 million of 7.35% Senior Notes due August 2018. The Tender Offer is expected to close in July 2017. In addition, the Company announced its plan to issue $300.0 million of Senior Notes due 2027 (the "2027 Notes"). The offering is expected to close in July 2017. The Company intends to use the net proceeds from the issuance of the 2027 Notes to fund the repurchase of a portion of the Company’s outstanding 2018 Notes in the Tender Offer and to redeem from available cash any remaining 2018 Notes that are not tendered following the Tender Offer's expiration, in each case together with accrued interest and expenses related thereto.