<SEC-DOCUMENT>0000950157-20-001165-index.html : 20201026
<SEC-HEADER>0000950157-20-001165.hdr.sgml : 20201026
<ACCEPTANCE-DATETIME>20200923161526
ACCESSION NUMBER:		0000950157-20-001165
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		11
CONFORMED PERIOD OF REPORT:	20200923
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20200923
DATE AS OF CHANGE:		20200923

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MARTIN MARIETTA MATERIALS INC
		CENTRAL INDEX KEY:			0000916076
		STANDARD INDUSTRIAL CLASSIFICATION:	MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
		IRS NUMBER:				561848578
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12744
		FILM NUMBER:		201192228

	BUSINESS ADDRESS:	
		STREET 1:		2710 WYCLIFF ROAD
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27607
		BUSINESS PHONE:		919-781-4550

	MAIL ADDRESS:	
		STREET 1:		2710 WYCLIFF ROAD
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27607
</SEC-HEADER>
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<TYPE>8-K
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<DESCRIPTION>CURRENT REPORT
<TEXT>
Document 1 - file: form8-k.htm

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<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>2
<FILENAME>ex10-1.htm
<DESCRIPTION>TWELFTH AMENDMENT TO CREDIT AND SECURITY AGREEMENT
<TEXT>
Document 2 - file: ex10-1.htm

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<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>mlm-20200923.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
Document 3 - file: mlm-20200923.xsd

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.LAB
<SEQUENCE>4
<FILENAME>mlm-20200923_lab.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
Document 4 - file: mlm-20200923_lab.xml

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<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>mlm-20200923_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
Document 5 - file: mlm-20200923_pre.xml

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<TEXT>
Document 6 - file: form8-k_htm.html

Document 6 - RAW XML: form8-k_htm.xml

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<SEQUENCE>7
<FILENAME>R1.htm
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<TEXT>
Document 7 - file: R1.htm

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<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>8
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 8 - file: Financial_Report.xlsx

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<TYPE>XML
<SEQUENCE>9
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 9 - file: Show.js

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>10
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 10 - file: report.css

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>11
<FILENAME>FilingSummary.xml
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<TEXT>
Document 11 - file: FilingSummary.html

Document 11 - RAW XML: FilingSummary.xml

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<TYPE>JSON
<SEQUENCE>12
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 12 - file: MetaLinks.json

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<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>13
<FILENAME>0000950157-20-001165-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 13 - file: 0000950157-20-001165-xbrl.zip

</DOCUMENT>
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