Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000794323-21-000013-index-headers.html | 2021-05-05 18:19:00 | |
| 0000794323-21-000013-index.html | 2021-05-05 18:19:00 | |
| 0000794323-21-000013.txt | 2021-05-05 18:19:00 | |
 0000794323-21-000013-xbrl.zip | 177980 | 2021-05-05 18:19:00 |
| FilingSummary.xml | 30897 | 2021-05-05 18:19:00 |
| Financial_Report.xlsx | 65949 | 2021-05-05 18:19:00 |
| lumn-20210331.htm | 842546 | 2021-05-05 18:19:00 |
| lumn-20210331.xsd | 38443 | 2021-05-05 18:19:00 |
| lumn-20210331_cal.xml | 69627 | 2021-05-05 18:19:00 |
| lumn-20210331_def.xml | 154736 | 2021-05-05 18:19:00 |
| lumn-20210331_htm.xml | 622488 | 2021-05-05 18:19:00 |
| lumn-20210331_lab.xml | 421137 | 2021-05-05 18:19:00 |
| lumn-20210331_pre.xml | 273000 | 2021-05-05 18:19:00 |
| lvltexhibit221-03312021.htm | 3644 | 2021-05-05 18:19:00 |
| lvltexhibit311-03312021.htm | 8415 | 2021-05-05 18:19:00 |
| lvltexhibit312-03312021.htm | 8330 | 2021-05-05 18:19:00 |
| lvltexhibit321-03312021.htm | 4842 | 2021-05-05 18:19:00 |
| lvltexhibit322-03312021.htm | 4900 | 2021-05-05 18:19:00 |
| MetaLinks.json | 445959 | 2021-05-05 18:19:00 |
| R1.htm | 46045 | 2021-05-05 18:19:00 |
| R10.htm | 7948 | 2021-05-05 18:19:00 |
| R11.htm | 19045 | 2021-05-05 18:19:00 |
| R12.htm | 21848 | 2021-05-05 18:19:00 |
| R13.htm | 53362 | 2021-05-05 18:19:00 |
| R14.htm | 16538 | 2021-05-05 18:19:00 |
| R15.htm | 35835 | 2021-05-05 18:19:00 |
| R16.htm | 15608 | 2021-05-05 18:19:00 |
| R17.htm | 18445 | 2021-05-05 18:19:00 |
| R18.htm | 23437 | 2021-05-05 18:19:00 |
| R19.htm | 12650 | 2021-05-05 18:19:00 |
| R2.htm | 52951 | 2021-05-05 18:19:00 |
| R20.htm | 31154 | 2021-05-05 18:19:00 |
| R21.htm | 24470 | 2021-05-05 18:19:00 |
| R22.htm | 45407 | 2021-05-05 18:19:00 |
| R23.htm | 10148 | 2021-05-05 18:19:00 |
| R24.htm | 36557 | 2021-05-05 18:19:00 |
| R25.htm | 11526 | 2021-05-05 18:19:00 |
| R26.htm | 22495 | 2021-05-05 18:19:00 |
| R27.htm | 12314 | 2021-05-05 18:19:00 |
| R28.htm | 4355 | 2021-05-05 18:19:00 |
| R29.htm | 6867 | 2021-05-05 18:19:00 |
| R3.htm | 22840 | 2021-05-05 18:19:00 |
| R30.htm | 16543 | 2021-05-05 18:19:00 |
| R31.htm | 16569 | 2021-05-05 18:19:00 |
| R32.htm | 8785 | 2021-05-05 18:19:00 |
| R33.htm | 10101 | 2021-05-05 18:19:00 |
| R34.htm | 13056 | 2021-05-05 18:19:00 |
| R35.htm | 4109 | 2021-05-05 18:19:00 |
| R36.htm | 28830 | 2021-05-05 18:19:00 |
| R37.htm | 14464 | 2021-05-05 18:19:00 |
| R38.htm | 10249 | 2021-05-05 18:19:00 |
| R39.htm | 11845 | 2021-05-05 18:19:00 |
| R4.htm | 5688 | 2021-05-05 18:19:00 |
| R40.htm | 12770 | 2021-05-05 18:19:00 |
| R41.htm | 6516 | 2021-05-05 18:19:00 |
| R42.htm | 13409 | 2021-05-05 18:19:00 |
| R43.htm | 41209 | 2021-05-05 18:19:00 |
| R44.htm | 19047 | 2021-05-05 18:19:00 |
| R45.htm | 15817 | 2021-05-05 18:19:00 |
| R46.htm | 10541 | 2021-05-05 18:19:00 |
| R47.htm | 30005 | 2021-05-05 18:19:00 |
| R48.htm | 21105 | 2021-05-05 18:19:00 |
| R49.htm | 17083 | 2021-05-05 18:19:00 |
| R5.htm | 89019 | 2021-05-05 18:19:00 |
| R6.htm | 7381 | 2021-05-05 18:19:00 |
| R7.htm | 68506 | 2021-05-05 18:19:00 |
| R8.htm | 4340 | 2021-05-05 18:19:00 |
| R9.htm | 27442 | 2021-05-05 18:19:00 |
| R9999.htm | 18405 | 2021-05-05 18:19:00 |
| report.css | 2767 | 2021-05-05 18:19:00 |
| Show.js | 1085 | 2021-05-05 18:19:00 |