ACCOUNTING POLICIES	3 Months Ended
Nov. 30, 2016
Accounting Policies [Abstract]
Accounting policies	NOTE 1. ACCOUNTING POLICIES Accounting Principles The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("GAAP") on a basis consistent with that used in the Annual Report on Form 10-K for the fiscal year ended August 31, 2016 filed by Commercial Metals Company ("CMC," and together with its consolidated subsidiaries, the "Company") with the Securities and Exchange Commission ("SEC") and include all normal recurring adjustments necessary to present fairly the condensed consolidated balance sheets and the condensed consolidated statements of earnings, comprehensive income (loss), cash flows and stockholders' equity for the periods indicated. These notes should be read in conjunction with the audited consolidated financial statements included in the Annual Report on Form 10-K for the fiscal year ended August 31, 2016. The results of operations for the three month period are not necessarily indicative of the results to be expected for the full year. Recently Adopted Accounting Pronouncements In the first quarter of fiscal 2017, the Company adopted Accounting Standards Update ("ASU") 2015-16, Business Combinations (Topic 805), issued by the Financial Accounting Standards Board (the "FASB") requiring the acquirer in a business combination to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The guidance was adopted on a prospective basis and did not have an impact on the Company's consolidated financial statements. In the first quarter of fiscal 2017, the Company adopted ASU 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), issued by the FASB requiring an entity to account for fees paid in a cloud computing arrangement as a license of internal-use software. The guidance was adopted on a prospective basis and did not have an impact on the Company's consolidated financial statements. In the first quarter of fiscal 2017, the Company adopted ASU 2015-02, Consolidation (Topic 810), issued by the FASB modifying the evaluation of whether limited partnerships and similar legal entities are voting interest entities ("VIEs"). The guidance was adopted on a retrospective basis and did not have an impact on the Company's consolidated financial statements. In the first quarter of fiscal 2017, the Company adopted ASU 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20), issued by the FASB eliminating the concept of extraordinary items. Under this guidance, an entity is no longer allowed to separately disclose extraordinary items, net of tax, in the income statement after income from continuing operations. The guidance was adopted on a prospective basis and did not have an impact on the Company's consolidated financial statements. In the first quarter of fiscal 2017, the Company adopted ASU 2014-13, Consolidation (Topic 810), issued by the FASB providing a measurement alternative to the existing fair value measurement guidance. When the measurement alternative is elected, the financial assets and liabilities are measured using the more observable of the fair value of the financial assets and the fair value of the financial liabilities. The guidance was adopted on a retrospective basis and did not have an impact on the Company's consolidated financial statements. In the first quarter of fiscal 2017, the Company adopted ASU 2014-12, Compensation - Stock Compensation (Topic 718), issued by the FASB requiring entities to account for a performance target as a performance condition if the target affects vesting and could be achieved after the requisite service period. The guidance was followed by the Company prior to its adoption and therefore had no impact on the Company's consolidated financial statements upon adoption. Recently Issued Accounting Pronouncements In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230), requiring that the statement of cash flows explain the change in the total cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. This guidance is effective for fiscal years, and interim reporting periods therein, beginning after December 15, 2017 with early adoption permitted. The provisions of this guidance are to be applied using a retrospective approach which requires application of the guidance for all periods presented. The Company is currently evaluating the impact of this guidance on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718), simplifying several aspects of accounting for share-based payment transactions, including recognizing excess tax benefits and deficiencies as income tax expense or benefit in the statement of earnings, classifying excess tax benefits and expenses as an operating activity within the statement of cash flows, and an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur. The provisions of this guidance related to excess tax benefits and deficiencies are to be applied on a prospective basis. If elected, the provisions of this guidance related to forfeitures are to be applied using a modified retrospective approach. This guidance is effective for fiscal years, and interim periods therein, beginning after December 15, 2016, with early adoption permitted. The Company intends to early adopt this guidance during fiscal year 2017 and is currently evaluating the impact this guidance will have on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), requiring a lessee to recognize a right-of-use asset and a lease liability on its balance sheet for all leases with terms of twelve months or greater. This guidance is effective for fiscal years, and interim reporting periods therein, beginning after December 15, 2018 with early adoption permitted. The provisions of this guidance are to be applied using a modified retrospective approach, with elective reliefs, which requires application of the guidance for all periods presented. The Company is currently evaluating the impact of this guidance on its consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), and has modified the standard thereafter. Under the new standard, revenue is recognized when a customer obtains control of promised goods or services and is recognized in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, the standard includes expanded disclosure requirements. This guidance is effective for fiscal years, and interim reporting periods therein, beginning after December 15, 2017 and will be effective for the Company beginning September 1, 2018, at which point the Company plans to adopt the standard. The standard permits the use of either the retrospective or cumulative effect transition method. The Company continues to evaluate the available adoption methods and the potential impact this standard will have on the consolidated financial statements.

NOTE 1. ACCOUNTING POLICIES

Accounting Principles

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States ("GAAP") on a basis consistent with that used in the Annual Report on Form 10-K for the fiscal year ended August 31, 2016 filed by Commercial Metals Company ("CMC," and together with its consolidated subsidiaries, the "Company") with the Securities and Exchange Commission ("SEC") and include all normal recurring adjustments necessary to present fairly the condensed consolidated balance sheets and the condensed consolidated statements of earnings, comprehensive income (loss), cash flows and stockholders' equity for the periods indicated. These notes should be read in conjunction with the audited consolidated financial statements included in the Annual Report on Form 10-K for the fiscal year ended August 31, 2016. The results of operations for the three month period are not necessarily indicative of the results to be expected for the full year.

Recently Adopted Accounting Pronouncements

In the first quarter of fiscal 2017, the Company adopted Accounting Standards Update ("ASU") 2015-16, Business Combinations (Topic 805), issued by the Financial Accounting Standards Board (the "FASB") requiring the acquirer in a business combination to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The guidance was adopted on a prospective basis and did not have an impact on the Company's consolidated financial statements.

In the first quarter of fiscal 2017, the Company adopted ASU 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), issued by the FASB requiring an entity to account for fees paid in a cloud computing arrangement as a license of internal-use software. The guidance was adopted on a prospective basis and did not have an impact on the Company's consolidated financial statements.

In the first quarter of fiscal 2017, the Company adopted ASU 2015-02, Consolidation (Topic 810), issued by the FASB modifying the evaluation of whether limited partnerships and similar legal entities are voting interest entities ("VIEs"). The guidance was adopted on a retrospective basis and did not have an impact on the Company's consolidated financial statements.

In the first quarter of fiscal 2017, the Company adopted ASU 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20), issued by the FASB eliminating the concept of extraordinary items. Under this guidance, an entity is no longer allowed to separately disclose extraordinary items, net of tax, in the income statement after income from continuing operations. The guidance was adopted on a prospective basis and did not have an impact on the Company's consolidated financial statements.

In the first quarter of fiscal 2017, the Company adopted ASU 2014-13, Consolidation (Topic 810), issued by the FASB providing a measurement alternative to the existing fair value measurement guidance. When the measurement alternative is elected, the financial assets and liabilities are measured using the more observable of the fair value of the financial assets and the fair value of the financial liabilities. The guidance was adopted on a retrospective basis and did not have an impact on the Company's consolidated financial statements.

In the first quarter of fiscal 2017, the Company adopted ASU 2014-12, Compensation - Stock Compensation (Topic 718), issued by the FASB requiring entities to account for a performance target as a performance condition if the target affects vesting and could be achieved after the requisite service period. The guidance was followed by the Company prior to its adoption and therefore had no impact on the Company's consolidated financial statements upon adoption.

Recently Issued Accounting Pronouncements

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230), requiring that the statement of cash flows explain the change in the total cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. This guidance is effective for fiscal years, and interim reporting periods therein, beginning after December 15, 2017 with early adoption permitted. The provisions of this guidance are to be applied using a retrospective approach which requires application of the guidance for all periods presented. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718), simplifying several aspects of accounting for share-based payment transactions, including recognizing excess tax benefits and deficiencies as income tax expense or benefit in the statement of earnings, classifying excess tax benefits and expenses as an operating activity within the statement of cash flows, and an option to recognize gross stock compensation expense with actual forfeitures recognized as they occur. The provisions of this guidance related to excess tax benefits and deficiencies are to be applied on a prospective basis. If elected, the provisions of this guidance related to forfeitures are to be applied using a modified retrospective approach. This guidance is effective for fiscal years, and interim periods therein, beginning after December 15, 2016, with early adoption permitted. The Company intends to early adopt this guidance during fiscal year 2017 and is currently evaluating the impact this guidance will have on its consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), requiring a lessee to recognize a right-of-use asset and a lease liability on its balance sheet for all leases with terms of twelve months or greater. This guidance is effective for fiscal years, and interim reporting periods therein, beginning after December 15, 2018 with early adoption permitted. The provisions of this guidance are to be applied using a modified retrospective approach, with elective reliefs, which requires application of the guidance for all periods presented. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), and has modified the standard thereafter. Under the new standard, revenue is recognized when a customer obtains control of promised goods or services and is recognized in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, the standard includes expanded disclosure requirements. This guidance is effective for fiscal years, and interim reporting periods therein, beginning after December 15, 2017 and will be effective for the Company beginning September 1, 2018, at which point the Company plans to adopt the standard. The standard permits the use of either the retrospective or cumulative effect transition method. The Company continues to evaluate the available adoption methods and the potential impact this standard will have on the consolidated financial statements.