<SEC-DOCUMENT>0001558370-20-010337-index.html : 20200811
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<ACCEPTANCE-DATETIME>20200811163540
ACCESSION NUMBER:		0001558370-20-010337
CONFORMED SUBMISSION TYPE:	10-Q/A
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20200630
FILED AS OF DATE:		20200811
DATE AS OF CHANGE:		20200811

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STEEL DYNAMICS INC
		CENTRAL INDEX KEY:			0001022671
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
		IRS NUMBER:				351929476
		STATE OF INCORPORATION:			IN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-Q/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21719
		FILM NUMBER:		201092919

	BUSINESS ADDRESS:	
		STREET 1:		7575 W JEFFERSON BLVD
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
		BUSINESS PHONE:		260 459 3553

	MAIL ADDRESS:	
		STREET 1:		7575 W JEFFERSON BLVD
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
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<DESCRIPTION>10-Q/A
<TEXT>
Document 1 - file: stld-20200630x10qa.htm

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Document 2 - file: stld-20200630xex31d1.htm

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<TYPE>EX-31.2
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<DESCRIPTION>EX-31.2
<TEXT>
Document 3 - file: stld-20200630xex31d2.htm

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<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>4
<FILENAME>stld-20200630.xsd
<DESCRIPTION>EX-101.SCH
<TEXT>
Document 4 - file: stld-20200630.xsd

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<DOCUMENT>
<TYPE>EX-101.LAB
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<FILENAME>stld-20200630_lab.xml
<DESCRIPTION>EX-101.LAB
<TEXT>
Document 5 - file: stld-20200630_lab.xml

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<TYPE>EX-101.PRE
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<FILENAME>stld-20200630_pre.xml
<DESCRIPTION>EX-101.PRE
<TEXT>
Document 6 - file: stld-20200630_pre.xml

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<TEXT>
Document 7 - file: stld-20200630x10qa_htm.html

Document 7 - RAW XML: stld-20200630x10qa_htm.xml

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<TEXT>
Document 8 - file: R1.htm

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<DOCUMENT>
<TYPE>EXCEL
<SEQUENCE>9
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 9 - file: Financial_Report.xlsx

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<SEQUENCE>10
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<TEXT>
Document 10 - file: Show.js

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<TYPE>XML
<SEQUENCE>11
<FILENAME>report.css
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<TEXT>
Document 11 - file: report.css

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<TYPE>XML
<SEQUENCE>12
<FILENAME>FilingSummary.xml
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<TEXT>
Document 12 - file: FilingSummary.html

Document 12 - RAW XML: FilingSummary.xml

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<TYPE>JSON
<SEQUENCE>14
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 14 - file: MetaLinks.json

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<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>15
<FILENAME>0001558370-20-010337-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 15 - file: 0001558370-20-010337-xbrl.zip

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