Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000764065-17-000135-index-headers.html | 2017-07-27 12:25:48 | |
| 0000764065-17-000135-index.html | 2017-07-27 12:25:48 | |
| 0000764065-17-000135.txt | 2017-07-27 12:25:48 | |
 0000764065-17-000135-xbrl.zip | 313090 | 2017-07-27 12:25:48 |
| clf-20170630.xml | 3310613 | 2017-07-27 12:25:48 |
| clf-20170630.xsd | 74761 | 2017-07-27 12:25:48 |
| clf-20170630_cal.xml | 101342 | 2017-07-27 12:25:48 |
| clf-20170630_def.xml | 457262 | 2017-07-27 12:25:48 |
| clf-20170630_lab.xml | 856821 | 2017-07-27 12:25:48 |
| clf-20170630_pre.xml | 620309 | 2017-07-27 12:25:48 |
| clf-201763010xq.htm | 2352118 | 2017-07-27 12:25:48 |
| clf-2017630ex103.htm | 104297 | 2017-07-27 12:25:48 |
| clf-2017630ex104.htm | 106530 | 2017-07-27 12:25:48 |
| clf-2017630ex105.htm | 74969 | 2017-07-27 12:25:48 |
| clf-2017630ex311.htm | 14659 | 2017-07-27 12:25:48 |
| clf-2017630ex312.htm | 14449 | 2017-07-27 12:25:48 |
| clf-2017630ex321.htm | 8931 | 2017-07-27 12:25:48 |
| clf-2017630ex322.htm | 8710 | 2017-07-27 12:25:48 |
| clf-2017630ex95.htm | 64034 | 2017-07-27 12:25:48 |
 clf-logoa01a01a06.jpg | 19593 | 2017-07-27 12:25:48 |
| FilingSummary.xml | 57642 | 2017-07-27 12:25:48 |
| Financial_Report.xlsx | 106900 | 2017-07-27 12:25:48 |
| R1.htm | 21955 | 2017-07-27 12:25:48 |
| R10.htm | 30933 | 2017-07-27 12:25:48 |
| R11.htm | 156052 | 2017-07-27 12:25:48 |
| R12.htm | 251623 | 2017-07-27 12:25:48 |
| R13.htm | 65817 | 2017-07-27 12:25:48 |
| R14.htm | 27109 | 2017-07-27 12:25:48 |
| R15.htm | 7180 | 2017-07-27 12:25:48 |
| R16.htm | 26609 | 2017-07-27 12:25:48 |
| R17.htm | 39691 | 2017-07-27 12:25:48 |
| R18.htm | 27688 | 2017-07-27 12:25:48 |
| R19.htm | 82077 | 2017-07-27 12:25:48 |
| R2.htm | 83483 | 2017-07-27 12:25:48 |
| R20.htm | 6349 | 2017-07-27 12:25:48 |
| R21.htm | 160238 | 2017-07-27 12:25:48 |
| R22.htm | 48123 | 2017-07-27 12:25:48 |
| R23.htm | 68436 | 2017-07-27 12:25:48 |
| R24.htm | 18809 | 2017-07-27 12:25:48 |
| R25.htm | 5867 | 2017-07-27 12:25:48 |
| R26.htm | 66292 | 2017-07-27 12:25:48 |
| R27.htm | 43066 | 2017-07-27 12:25:48 |
| R28.htm | 216895 | 2017-07-27 12:25:48 |
| R29.htm | 30140 | 2017-07-27 12:25:48 |
| R3.htm | 28196 | 2017-07-27 12:25:48 |
| R30.htm | 28387 | 2017-07-27 12:25:48 |
| R31.htm | 151830 | 2017-07-27 12:25:48 |
| R32.htm | 250501 | 2017-07-27 12:25:48 |
| R33.htm | 62008 | 2017-07-27 12:25:48 |
| R34.htm | 20546 | 2017-07-27 12:25:48 |
| R35.htm | 23668 | 2017-07-27 12:25:48 |
| R36.htm | 38589 | 2017-07-27 12:25:48 |
| R37.htm | 21329 | 2017-07-27 12:25:48 |
| R38.htm | 68506 | 2017-07-27 12:25:48 |
| R39.htm | 159593 | 2017-07-27 12:25:48 |
| R4.htm | 82579 | 2017-07-27 12:25:48 |
| R40.htm | 46266 | 2017-07-27 12:25:48 |
| R41.htm | 67284 | 2017-07-27 12:25:48 |
| R42.htm | 11411 | 2017-07-27 12:25:48 |
| R43.htm | 19459 | 2017-07-27 12:25:48 |
| R44.htm | 9850 | 2017-07-27 12:25:48 |
| R45.htm | 60080 | 2017-07-27 12:25:48 |
| R46.htm | 13007 | 2017-07-27 12:25:48 |
| R47.htm | 14964 | 2017-07-27 12:25:48 |
| R48.htm | 4541 | 2017-07-27 12:25:48 |
| R49.htm | 31457 | 2017-07-27 12:25:48 |
| R5.htm | 24528 | 2017-07-27 12:25:48 |
| R50.htm | 39685 | 2017-07-27 12:25:48 |
| R51.htm | 53129 | 2017-07-27 12:25:48 |
| R52.htm | 24502 | 2017-07-27 12:25:48 |
| R53.htm | 21120 | 2017-07-27 12:25:48 |
| R54.htm | 32918 | 2017-07-27 12:25:48 |
| R55.htm | 25483 | 2017-07-27 12:25:48 |
| R56.htm | 54028 | 2017-07-27 12:25:48 |
| R57.htm | 28731 | 2017-07-27 12:25:48 |
| R58.htm | 55104 | 2017-07-27 12:25:48 |
| R59.htm | 12822 | 2017-07-27 12:25:48 |
| R6.htm | 68776 | 2017-07-27 12:25:48 |
| R60.htm | 11243 | 2017-07-27 12:25:48 |
| R61.htm | 24065 | 2017-07-27 12:25:48 |
| R62.htm | 20024 | 2017-07-27 12:25:48 |
| R63.htm | 18394 | 2017-07-27 12:25:48 |
| R64.htm | 7660 | 2017-07-27 12:25:48 |
| R65.htm | 4477 | 2017-07-27 12:25:48 |
| R66.htm | 41959 | 2017-07-27 12:25:48 |
| R67.htm | 10654 | 2017-07-27 12:25:48 |
| R68.htm | 20163 | 2017-07-27 12:25:48 |
| R69.htm | 14448 | 2017-07-27 12:25:48 |
| R7.htm | 55370 | 2017-07-27 12:25:48 |
| R70.htm | 11995 | 2017-07-27 12:25:48 |
| R71.htm | 10857 | 2017-07-27 12:25:48 |
| R72.htm | 25537 | 2017-07-27 12:25:48 |
| R73.htm | 28717 | 2017-07-27 12:25:48 |
| R74.htm | 14597 | 2017-07-27 12:25:48 |
| R75.htm | 21006 | 2017-07-27 12:25:48 |
| R76.htm | 5292 | 2017-07-27 12:25:48 |
| R77.htm | 61069 | 2017-07-27 12:25:48 |
| R78.htm | 33007 | 2017-07-27 12:25:48 |
| R79.htm | 22929 | 2017-07-27 12:25:48 |
| R8.htm | 219368 | 2017-07-27 12:25:48 |
| R80.htm | 17140 | 2017-07-27 12:25:48 |
| R81.htm | 22483 | 2017-07-27 12:25:48 |
| R82.htm | 9451 | 2017-07-27 12:25:48 |
| R83.htm | 12616 | 2017-07-27 12:25:48 |
| R84.htm | 49954 | 2017-07-27 12:25:48 |
| R85.htm | 13797 | 2017-07-27 12:25:48 |
| R86.htm | 10808 | 2017-07-27 12:25:48 |
| R9.htm | 29752 | 2017-07-27 12:25:48 |
| report.css | 2768 | 2017-07-27 12:25:48 |
| Show.js | 1411 | 2017-07-27 12:25:48 |