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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Feb. 17, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Period End Date Dec. 31, 2024    
Document Annual Report true    
Document Transition Report false    
Entity File Number 1-12744    
Entity Registrant Name MARTIN MARIETTA MATERIALS, INC.    
Document Fiscal Period Focus FY    
Trading Symbol MLM    
Entity Central Index Key 0000916076    
Entity Incorporation, State or Country Code NC    
Entity Tax Identification Number 56-1848578    
Entity Address, Address Line One 4123 Parklake Avenue    
Entity Address, City or Town Raleigh    
Entity Address, State or Province NC    
Entity Address, Postal Zip Code 27612    
City Area Code 919    
Local Phone Number 781-4550    
Title of 12(b) Security Common Stock (par value $.01 per share)    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   60,974,146  
Entity Public Float     $ 29,035,890,412
Entity Emerging Growth Company false    
Entity Small Business false    
Current Fiscal Year End Date --12-31    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Firm ID 238    
Auditor Location Raleigh, North Carolina, United States    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

 

Document

 

Parts Into Which Incorporated

Proxy Statement for the Annual Meeting of Shareholders to be held May 15, 2025 (Proxy Statement)

 

Part III

 

 

 

 

    
Auditor Opinion

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Martin Marietta Materials, Inc. and its subsidiaries (the "Company") as of December 31, 2024 and 2023, and the related consolidated statements of earnings, of comprehensive earnings, of total equity and of cash flows for each of the three years in the period ended December 31, 2024, including the related notes and schedule of valuation and qualifying accounts for each of the three years in the period ended December 31, 2024 appearing under Item 15(a)(2) (collectively referred to as the "consolidated financial statements"). We also have audited 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 (COSO).

In our opinion, the consolidated financial statements referred to above 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. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.