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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Jan. 31, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Trading Symbol SCL    
Entity Registrant Name STEPAN COMPANY    
Entity Well Known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Central Index Key 0000094049    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Shell Company false    
Entity Emerging Growth Company false    
Entity Tax Identification Number 36-1823834    
Entity File Number 1-4462    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 1101 Skokie Boulevard    
Entity Address, Address Line Two Suite 500    
Entity Address, City or Town Northbrook    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60062    
City Area Code 847    
Local Phone Number 446-7500    
Security Exchange Name NYSE    
Title of 12(b) Security Common Stock, $1 par value    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Entity Common Stock, Shares Outstanding   22,504,117  
Entity Public Float     $ 1,755,684,034
ICFR Auditor Attestation Flag true    
Auditor Name DELOITTE & TOUCHE LLP    
Auditor Location Chicago, Illinois    
Auditor Firm ID 34    
Documents Incorporated by Reference

Documents Incorporated by Reference

 

Part of Form 10-K

Document Incorporated

Part III, Items 10-14

Portions of the Proxy Statement for Annual Meeting of Stockholders expected to be held April 29, 2025.

* Based on reported ownership by all directors and executive officers at June 30, 2024.

   
Document Financial Statement Error Correction [Flag] false    
Auditor Opinion [Text Block]

Opinion on the Financial Statements

 

We have audited the accompanying consolidated balance sheets of Stepan Company and subsidiaries (the “Company”) as of December 31, 2024 and 2023, the related consolidated statements of income, comprehensive income, stockholders’ equity, and cash flows, for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 27, 2025, expressed an unqualified opinion on the Company’s internal control over financial reporting.