    <SEC-DOCUMENT>0001193125-21-000153-index.html : 20210104
    <SEC-HEADER>0001193125-21-000153.hdr.sgml : 20210104
    <ACCEPTANCE-DATETIME>20210104060557
    ACCESSION NUMBER:		0001193125-21-000153
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		16
    CONFORMED PERIOD OF REPORT:	20201231
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Other Events
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20210104
    DATE AS OF CHANGE:		20210104

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			PEABODY ENERGY CORP
    		CENTRAL INDEX KEY:			0001064728
    		STANDARD INDUSTRIAL CLASSIFICATION:	BITUMINOUS COAL & LIGNITE SURFACE MINING [1221]
    		IRS NUMBER:				134004153
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-16463
    		FILM NUMBER:		21500048

    	BUSINESS ADDRESS:
    		STREET 1:		701 MARKET ST
    		CITY:			ST LOUIS
    		STATE:			MO
    		ZIP:			63101-1826
    		BUSINESS PHONE:		3143423400

    	MAIL ADDRESS:
    		STREET 1:		701 MARKET ST
    		CITY:			ST LOUIS
    		STATE:			MO
    		ZIP:			63101-1826

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	P&L COAL HOLDINGS CORP
    		DATE OF NAME CHANGE:	19980623
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    <SEQUENCE>1
    <FILENAME>d103420d8k.htm
    <DESCRIPTION>8-K
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    Document 1 - file: d103420d8k.htm

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    <TYPE>EX-10.1
    <SEQUENCE>2
    <FILENAME>d103420dex101.htm
    <DESCRIPTION>EX-10.1
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    <SEQUENCE>3
    <FILENAME>d103420dex102.htm
    <DESCRIPTION>EX-10.2
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    <DESCRIPTION>EX-99.1
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    <FILENAME>btu-20201231.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
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    <SEQUENCE>6
    <FILENAME>btu-20201231_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
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    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>btu-20201231_pre.xml
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    <FILENAME>g103420g0101021148021.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>10
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    <TYPE>EXCEL
    <SEQUENCE>11
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: Financial_Report.xlsx

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    <TYPE>XML
    <SEQUENCE>12
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    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <SEQUENCE>13
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>14
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    <TEXT>
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    <TYPE>JSON
    <SEQUENCE>17
    <FILENAME>MetaLinks.json
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    <TEXT>
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    <TYPE>ZIP
    <SEQUENCE>18
    <FILENAME>0001193125-21-000153-xbrl.zip
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