CAPITAL STOCK	12 Months Ended
Aug. 31, 2014
Stockholders' Equity Note [Abstract]
CAPITAL STOCK	NOTE 16. CAPITAL STOCK Treasury Stock CMC did not purchase any shares during the years ended August 31, 2014 and 2013 and had remaining authorization to purchase 8,259,647 shares of its common stock at August 31, 2014. On October 27, 2014, the Board of Directors authorized a new share repurchase program under which the Company may repurchase up to $100.0 million of CMC's outstanding common stock. This new program replaces the existing program, which has been terminated by the Company's Board of Directors in connection with the approval of the new program. The Company intends to repurchase shares from time to time for cash in open market transactions or in privately-negotiated transactions in accordance with applicable federal securities laws. The timing and the amount of repurchases, if any, will be determined by the Company's management based on its evaluation of market conditions, capital allocation alternatives and other factors. The new share repurchase program does not require the Company to acquire any dollar amount or number of shares of CMC's common stock and may be modified, suspended, extended or terminated by the Company at any time without prior notice. Preferred Stock Preferred stock has a par value of $1.00 per share, with 2,000,000 shares authorized. It may be issued in series, and the shares of each series have such rights and preferences as may be fixed by CMC's Board of Directors when authorizing the issuance of that particular series. There are no shares of preferred stock outstanding. Stockholder Rights Plan On July 30, 2011, CMC's Board of Directors adopted a stockholder rights plan ("Rights Plan") pursuant to which the Board declared a dividend to stockholders of record as of August 11, 2011, of one Preferred Stock Purchase Right ("Right") on each outstanding share of CMC common stock. On December 6, 2012, the Company terminated the Rights Plan. No Rights were exercised, traded or redeemed under the Rights Plan.

CAPITAL STOCK

12 Months Ended

Aug. 31, 2014

Stockholders' Equity Note [Abstract]

NOTE 16. CAPITAL STOCK

Treasury Stock

CMC did not purchase any shares during the years ended August 31, 2014 and 2013 and had remaining authorization to purchase 8,259,647 shares of its common stock at August 31, 2014.

On October 27, 2014, the Board of Directors authorized a new share repurchase program under which the Company may repurchase up to $100.0 million of CMC's outstanding common stock. This new program replaces the existing program, which has been terminated by the Company's Board of Directors in connection with the approval of the new program. The Company intends to repurchase shares from time to time for cash in open market transactions or in privately-negotiated transactions in accordance with applicable federal securities laws. The timing and the amount of repurchases, if any, will be determined by the Company's management based on its evaluation of market conditions, capital allocation alternatives and other factors. The new share repurchase program does not require the Company to acquire any dollar amount or number of shares of CMC's common stock and may be modified, suspended, extended or terminated by the Company at any time without prior notice.

Preferred Stock

Preferred stock has a par value of $1.00 per share, with 2,000,000 shares authorized. It may be issued in series, and the shares of each series have such rights and preferences as may be fixed by CMC's Board of Directors when authorizing the issuance of that particular series. There are no shares of preferred stock outstanding.

Stockholder Rights Plan

On July 30, 2011, CMC's Board of Directors adopted a stockholder rights plan ("Rights Plan") pursuant to which the Board declared a dividend to stockholders of record as of August 11, 2011, of one Preferred Stock Purchase Right ("Right") on each outstanding share of CMC common stock. On December 6, 2012, the Company terminated the Rights Plan. No Rights were exercised, traded or redeemed under the Rights Plan.