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| 0000764065-20-000187-index.html | 2020-05-11 08:05:25 | |
| 0000764065-20-000187.txt | 2020-05-11 08:05:25 | |
 0000764065-20-000187-xbrl.zip | 29723 | 2020-05-11 08:05:25 |
 clevelandcliffsincreportssec.jpg | 280827 | 2020-05-11 08:05:25 |
| clf-20200511.xsd | 4493 | 2020-05-11 08:05:25 |
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| clf-20200511_pre.xml | 14149 | 2020-05-11 08:05:25 |
| clf-20203318xkex991.htm | 261205 | 2020-05-11 08:05:25 |
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| Financial_Report.xlsx | 5812 | 2020-05-11 08:05:25 |
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| q12020earningsrelease8.htm | 49866 | 2020-05-11 08:05:25 |
| q12020earningsrelease8_htm.xml | 4673 | 2020-05-11 08:05:25 |
| R1.htm | 40151 | 2020-05-11 08:05:25 |
| report.css | 2767 | 2020-05-11 08:05:25 |
| Show.js | 1085 | 2020-05-11 08:05:25 |