XML 18 R1.htm IDEA: XBRL DOCUMENT v3.23.3
Document and Entity Information Document - USD ($)
 12 Months Ended
Aug. 31, 2023
Oct. 23, 2023
Feb. 28, 2023
Entity Information [Line Items]      
Document Type 10-K    
Document Period End Date Aug. 31, 2023    
Entity Registrant Name SCHNITZER STEEL INDUSTRIES, INC.    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Trading Symbol RDUS    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000912603    
Entity Voluntary Filers No    
Current Fiscal Year End Date --08-31    
Entity Filer Category Large Accelerated Filer    
Entity Emerging Growth Company false    
Entity Well-known Seasoned Issuer Yes    
Entity Small Business false    
Entity Shell Company false    
Entity Public Float     $ 854,343,899
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity File Number 000-22496    
Entity Tax Identification Number 93-0341923    
Entity Address, Address Line One 299 SW Clay Street    
Entity Address, Address Line Two Suite 400    
Entity Address, City or Town Portland    
Entity Address, State or Province OR    
Entity Address, Postal Zip Code 97201    
City Area Code 503    
Local Phone Number 224-9900    
Entity Incorporation, State or Country Code OR    
Title of 12(b) Security Class A Common Stock, $1.00 par value    
Security Exchange Name NASDAQ    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Document Annual Report true    
Document Transition Report false    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Location Portland, Oregon    
Auditor Firm ID 238    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive Proxy Statement for the January 2024 Annual Meeting of Shareholders are incorporated by reference into Part III of this report.

    
Class A Common Stock      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   27,312,233  
Class B Common Stock      
Entity Information [Line Items]      
Entity Common Stock, Shares Outstanding   200,000