    <SEC-DOCUMENT>0000893538-20-000094-index.html : 20200618
    <SEC-HEADER>0000893538-20-000094.hdr.sgml : 20200618
    <ACCEPTANCE-DATETIME>20200617215820
    ACCESSION NUMBER:		0000893538-20-000094
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		20
    CONFORMED PERIOD OF REPORT:	20200617
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
    ITEM INFORMATION:		Unregistered Sales of Equity Securities
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20200618
    DATE AS OF CHANGE:		20200617

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			SM Energy Co
    		CENTRAL INDEX KEY:			0000893538
    		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
    		IRS NUMBER:				410518430
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-31539
    		FILM NUMBER:		20971140

    	BUSINESS ADDRESS:
    		STREET 1:		1775 SHERMAN STREET
    		STREET 2:		SUITE 1200
    		CITY:			DENVER
    		STATE:			CO
    		ZIP:			80203
    		BUSINESS PHONE:		303-861-8140

    	MAIL ADDRESS:
    		STREET 1:		1775 SHERMAN STREET
    		STREET 2:		SUITE 1200
    		CITY:			DENVER
    		STATE:			CO
    		ZIP:			80203

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ST MARY LAND & EXPLORATION CO
    		DATE OF NAME CHANGE:	19940228
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>sm-20200617.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: sm-20200617.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-4.1
    <SEQUENCE>2
    <FILENAME>exhibit41-secondlienno.htm
    <DESCRIPTION>EX-4.1
    <TEXT>
    Document 2 - file: exhibit41-secondlienno.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-4.2
    <SEQUENCE>3
    <FILENAME>exhibit42warrantagreem.htm
    <DESCRIPTION>EX-4.2
    <TEXT>
    Document 3 - file: exhibit42warrantagreem.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.1
    <SEQUENCE>4
    <FILENAME>exhibit101intercredito.htm
    <DESCRIPTION>EX-10.1
    <TEXT>
    Document 4 - file: exhibit101intercredito.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.2
    <SEQUENCE>5
    <FILENAME>exhibit102secondlienpl.htm
    <DESCRIPTION>EX-10.2
    <TEXT>
    Document 5 - file: exhibit102secondlienpl.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.3
    <SEQUENCE>6
    <FILENAME>exhibit103secondliense.htm
    <DESCRIPTION>EX-10.3
    <TEXT>
    Document 6 - file: exhibit103secondliense.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.4
    <SEQUENCE>7
    <FILENAME>exhibit104collateraltr.htm
    <DESCRIPTION>EX-10.4
    <TEXT>
    Document 7 - file: exhibit104collateraltr.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>8
    <FILENAME>sm-20200617.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 8 - file: sm-20200617.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.CAL
    <SEQUENCE>9
    <FILENAME>sm-20200617_cal.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT
    <TEXT>
    Document 9 - file: sm-20200617_cal.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>10
    <FILENAME>sm-20200617_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
    <TEXT>
    Document 10 - file: sm-20200617_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>11
    <FILENAME>sm-20200617_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 11 - file: sm-20200617_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>12
    <FILENAME>sm-20200617_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 12 - file: sm-20200617_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>sm-20200617_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: sm-20200617_htm.html

    Document 13 - RAW XML: sm-20200617_htm.xml

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: Show.js

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>16
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: FilingSummary.html

    Document 16 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>20
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: Financial_Report.xlsx

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    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>21
    <FILENAME>0000893538-20-000094-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 21 - file: 0000893538-20-000094-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>22
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 22 - file: MetaLinks.json

    </DOCUMENT>
    </SEC-DOCUMENT>