    <SEC-DOCUMENT>0000789933-22-000027-index.html : 20220331
    <SEC-HEADER>0000789933-22-000027.hdr.sgml : 20220331
    <ACCEPTANCE-DATETIME>20220331121456
    ACCESSION NUMBER:		0000789933-22-000027
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		30
    CONFORMED PERIOD OF REPORT:	20220331
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20220331
    DATE AS OF CHANGE:		20220331

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			NACCO INDUSTRIES INC
    		CENTRAL INDEX KEY:			0000789933
    		STANDARD INDUSTRIAL CLASSIFICATION:	BITUMINOUS COAL & LIGNITE SURFACE MINING [1221]
    		IRS NUMBER:				341505819
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-09172
    		FILM NUMBER:		22790635

    	BUSINESS ADDRESS:
    		STREET 1:		5875 LANDERBROOK DR
    		STREET 2:		SUITE 220
    		CITY:			CLEVELAND
    		STATE:			OH
    		ZIP:			44124-4069
    		BUSINESS PHONE:		4402295123

    	MAIL ADDRESS:
    		STREET 1:		5875 LANDERBROOK DR
    		CITY:			CLEVELAND
    		STATE:			OH
    		ZIP:			44124
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>nacco-20220331.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: nacco-20220331.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99
    <SEQUENCE>2
    <FILENAME>annualreport2021ex99.htm
    <DESCRIPTION>EX-99
    <TEXT>
    Document 2 - file: annualreport2021ex99.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>nacco-20220331.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: nacco-20220331.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>nacco-20220331_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 4 - file: nacco-20220331_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>nacco-20220331_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: nacco-20220331_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>annualreport2021ex99001.jpg
    <TEXT>
    Document 6 - file: annualreport2021ex99001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>annualreport2021ex99002.jpg
    <TEXT>
    Document 7 - file: annualreport2021ex99002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>annualreport2021ex99003.jpg
    <TEXT>
    Document 8 - file: annualreport2021ex99003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>annualreport2021ex99004.jpg
    <TEXT>
    Document 9 - file: annualreport2021ex99004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>annualreport2021ex99005.jpg
    <TEXT>
    Document 10 - file: annualreport2021ex99005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>annualreport2021ex99006.jpg
    <TEXT>
    Document 11 - file: annualreport2021ex99006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>annualreport2021ex99007.jpg
    <TEXT>
    Document 12 - file: annualreport2021ex99007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>annualreport2021ex99008.jpg
    <TEXT>
    Document 13 - file: annualreport2021ex99008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>annualreport2021ex99009.jpg
    <TEXT>
    Document 14 - file: annualreport2021ex99009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>annualreport2021ex99010.jpg
    <TEXT>
    Document 15 - file: annualreport2021ex99010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>annualreport2021ex99011.jpg
    <TEXT>
    Document 16 - file: annualreport2021ex99011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>annualreport2021ex99012.jpg
    <TEXT>
    Document 17 - file: annualreport2021ex99012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>annualreport2021ex99013.jpg
    <TEXT>
    Document 18 - file: annualreport2021ex99013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>annualreport2021ex99014.jpg
    <TEXT>
    Document 19 - file: annualreport2021ex99014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>annualreport2021ex99015.jpg
    <TEXT>
    Document 20 - file: annualreport2021ex99015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>annualreport2021ex99016.jpg
    <TEXT>
    Document 21 - file: annualreport2021ex99016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>annualreport2021ex99017.jpg
    <TEXT>
    Document 22 - file: annualreport2021ex99017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>23
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 23 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>24
    <FILENAME>nacco-20220331_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 24 - file: nacco-20220331_htm.html

    Document 24 - RAW XML: nacco-20220331_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>25
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 25 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>26
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 26 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>27
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 27 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>28
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 28 - file: FilingSummary.html

    Document 28 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>30
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 30 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>31
    <FILENAME>0000789933-22-000027-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 31 - file: 0000789933-22-000027-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>