    <SEC-DOCUMENT>0000764065-23-000036-index.html : 20230214
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    <ACCEPTANCE-DATETIME>20230214171811
    ACCESSION NUMBER:		0000764065-23-000036
    CONFORMED SUBMISSION TYPE:	S-3ASR
    PUBLIC DOCUMENT COUNT:		27
    FILED AS OF DATE:		20230214
    DATE AS OF CHANGE:		20230214
    EFFECTIVENESS DATE:		20230214

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CLEVELAND-CLIFFS INC.
    		CENTRAL INDEX KEY:			0000764065
    		STANDARD INDUSTRIAL CLASSIFICATION:	METAL MINING [1000]
    		IRS NUMBER:				341464672
    		STATE OF INCORPORATION:			OH
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		S-3ASR
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-269774
    		FILM NUMBER:		23631671

    	BUSINESS ADDRESS:
    		STREET 1:		200 PUBLIC SQUARE
    		STREET 2:		STE. 3300
    		CITY:			CLEVELAND
    		STATE:			OH
    		ZIP:			44114-2315
    		BUSINESS PHONE:		216-694-5700

    	MAIL ADDRESS:
    		STREET 1:		200 PUBLIC SQUARE
    		STREET 2:		STE. 3300
    		CITY:			CLEVELAND
    		STATE:			OH
    		ZIP:			44114-2315

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CLIFFS NATURAL RESOURCES INC.
    		DATE OF NAME CHANGE:	20081015

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CLEVELAND CLIFFS INC
    		DATE OF NAME CHANGE:	19920703
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>S-3ASR
    <SEQUENCE>1
    <FILENAME>clfs-3asr2023.htm
    <DESCRIPTION>S-3ASR
    <TEXT>
    Document 1 - file: clfs-3asr2023.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-FILING FEES
    <SEQUENCE>2
    <FILENAME>clfs-3asr2023ex107.htm
    <DESCRIPTION>EX-FILING FEES
    <TEXT>
    Document 2 - file: clfs-3asr2023ex107.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-5.1
    <SEQUENCE>3
    <FILENAME>clfs-3asr2023ex51.htm
    <DESCRIPTION>EX-5.1
    <TEXT>
    Document 3 - file: clfs-3asr2023ex51.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.1
    <SEQUENCE>4
    <FILENAME>clfs-3asr2023ex231.htm
    <DESCRIPTION>EX-23.1
    <TEXT>
    Document 4 - file: clfs-3asr2023ex231.htm

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    <DOCUMENT>
    <TYPE>EX-23.2
    <SEQUENCE>5
    <FILENAME>clfs-3asr2023ex232.htm
    <DESCRIPTION>EX-23.2
    <TEXT>
    Document 5 - file: clfs-3asr2023ex232.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.3
    <SEQUENCE>6
    <FILENAME>clfs-3asr2023ex233.htm
    <DESCRIPTION>EX-23.3
    <TEXT>
    Document 6 - file: clfs-3asr2023ex233.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.4
    <SEQUENCE>7
    <FILENAME>clfs-3asr2023ex234.htm
    <DESCRIPTION>EX-23.4
    <TEXT>
    Document 7 - file: clfs-3asr2023ex234.htm

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    <DOCUMENT>
    <TYPE>EX-23.5
    <SEQUENCE>8
    <FILENAME>clfs-3asr2023ex235.htm
    <DESCRIPTION>EX-23.5
    <TEXT>
    Document 8 - file: clfs-3asr2023ex235.htm

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    <DOCUMENT>
    <TYPE>EX-23.6
    <SEQUENCE>9
    <FILENAME>clfs-3asr2023ex236.htm
    <DESCRIPTION>EX-23.6
    <TEXT>
    Document 9 - file: clfs-3asr2023ex236.htm

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    <DOCUMENT>
    <TYPE>EX-24.1
    <SEQUENCE>10
    <FILENAME>clfs-3asr2023ex241.htm
    <DESCRIPTION>EX-24.1
    <TEXT>
    Document 10 - file: clfs-3asr2023ex241.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-25.1
    <SEQUENCE>11
    <FILENAME>clfs-3asr2023ex251.htm
    <DESCRIPTION>EX-25.1
    <TEXT>
    Document 11 - file: clfs-3asr2023ex251.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>cliffslogo2.jpg
    <TEXT>
    Document 12 - file: cliffslogo2.jpg

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

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>image_3a.jpg
    <TEXT>
    Document 14 - file: image_3a.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>jdlogoa09.jpg
    <TEXT>
    Document 15 - file: jdlogoa09.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>jdlogoa092.jpg
    <TEXT>
    Document 16 - file: jdlogoa092.jpg

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

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

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>slrlogo1.jpg
    <TEXT>
    Document 19 - file: slrlogo1.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>slrlogo2.jpg
    <TEXT>
    Document 20 - file: slrlogo2.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>slrlogo3.jpg
    <TEXT>
    Document 21 - file: slrlogo3.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>slrlogo4.jpg
    <TEXT>
    Document 22 - file: slrlogo4.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>slrsolutions.jpg
    <TEXT>
    Document 23 - file: slrsolutions.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>slrsolutions1.jpg
    <TEXT>
    Document 24 - file: slrsolutions1.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>slrsolutions2.jpg
    <TEXT>
    Document 25 - file: slrsolutions2.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>slrsolutions3.jpg
    <TEXT>
    Document 26 - file: slrsolutions3.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>slrsolutions4.jpg
    <TEXT>
    Document 27 - file: slrsolutions4.jpg

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