Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000821130-24-000007-index-headers.html | 2024-02-16 07:44:09 | |
| 0000821130-24-000007-index.html | 2024-02-16 07:44:09 | |
| 0000821130-24-000007.txt | 2024-02-16 07:44:09 | |
 0000821130-24-000007-xbrl.zip | 868481 | 2024-02-16 07:44:09 |
| FilingSummary.xml | 54226 | 2024-02-16 07:44:09 |
| Financial_Report.xlsx | 147760 | 2024-02-16 07:44:09 |
| MetaLinks.json | 1214497 | 2024-02-16 07:44:09 |
| R1.htm | 73192 | 2024-02-16 07:44:09 |
| R10.htm | 21308 | 2024-02-16 07:44:09 |
| R11.htm | 81807 | 2024-02-16 07:44:09 |
| R12.htm | 108017 | 2024-02-16 07:44:09 |
| R13.htm | 22674 | 2024-02-16 07:44:09 |
| R14.htm | 7350 | 2024-02-16 07:44:09 |
| R15.htm | 45782 | 2024-02-16 07:44:09 |
| R16.htm | 27261 | 2024-02-16 07:44:09 |
| R17.htm | 53858 | 2024-02-16 07:44:09 |
| R18.htm | 16079 | 2024-02-16 07:44:09 |
| R19.htm | 92108 | 2024-02-16 07:44:09 |
| R2.htm | 7799 | 2024-02-16 07:44:09 |
| R20.htm | 10926 | 2024-02-16 07:44:09 |
| R21.htm | 35725 | 2024-02-16 07:44:09 |
| R22.htm | 7517 | 2024-02-16 07:44:09 |
| R23.htm | 12543 | 2024-02-16 07:44:09 |
| R24.htm | 57128 | 2024-02-16 07:44:09 |
| R25.htm | 23293 | 2024-02-16 07:44:09 |
| R26.htm | 10489 | 2024-02-16 07:44:09 |
| R27.htm | 15236 | 2024-02-16 07:44:09 |
| R28.htm | 8482 | 2024-02-16 07:44:09 |
| R29.htm | 99436 | 2024-02-16 07:44:09 |
| R3.htm | 105493 | 2024-02-16 07:44:09 |
| R30.htm | 19986 | 2024-02-16 07:44:09 |
| R31.htm | 36093 | 2024-02-16 07:44:09 |
| R32.htm | 19902 | 2024-02-16 07:44:09 |
| R33.htm | 84196 | 2024-02-16 07:44:09 |
| R34.htm | 112757 | 2024-02-16 07:44:09 |
| R35.htm | 20738 | 2024-02-16 07:44:09 |
| R36.htm | 44367 | 2024-02-16 07:44:09 |
| R37.htm | 26090 | 2024-02-16 07:44:09 |
| R38.htm | 57982 | 2024-02-16 07:44:09 |
| R39.htm | 14774 | 2024-02-16 07:44:09 |
| R4.htm | 105357 | 2024-02-16 07:44:09 |
| R40.htm | 80175 | 2024-02-16 07:44:09 |
| R41.htm | 29764 | 2024-02-16 07:44:09 |
| R42.htm | 49521 | 2024-02-16 07:44:09 |
| R43.htm | 23319 | 2024-02-16 07:44:09 |
| R44.htm | 47246 | 2024-02-16 07:44:09 |
| R45.htm | 11834 | 2024-02-16 07:44:09 |
| R46.htm | 9469 | 2024-02-16 07:44:09 |
| R47.htm | 11944 | 2024-02-16 07:44:09 |
| R48.htm | 31603 | 2024-02-16 07:44:09 |
| R49.htm | 7368 | 2024-02-16 07:44:09 |
| R5.htm | 150565 | 2024-02-16 07:44:09 |
| R50.htm | 14036 | 2024-02-16 07:44:09 |
| R51.htm | 26711 | 2024-02-16 07:44:09 |
| R52.htm | 4278 | 2024-02-16 07:44:09 |
| R53.htm | 17424 | 2024-02-16 07:44:09 |
| R54.htm | 46283 | 2024-02-16 07:44:09 |
| R55.htm | 22220 | 2024-02-16 07:44:09 |
| R56.htm | 8685 | 2024-02-16 07:44:09 |
| R57.htm | 18872 | 2024-02-16 07:44:09 |
| R58.htm | 27690 | 2024-02-16 07:44:09 |
| R59.htm | 33529 | 2024-02-16 07:44:09 |
| R6.htm | 56120 | 2024-02-16 07:44:09 |
| R60.htm | 36066 | 2024-02-16 07:44:09 |
| R61.htm | 9561 | 2024-02-16 07:44:09 |
| R62.htm | 15955 | 2024-02-16 07:44:09 |
| R63.htm | 35839 | 2024-02-16 07:44:09 |
| R64.htm | 7375 | 2024-02-16 07:44:09 |
| R65.htm | 26021 | 2024-02-16 07:44:09 |
| R66.htm | 116595 | 2024-02-16 07:44:09 |
| R67.htm | 56750 | 2024-02-16 07:44:09 |
| R68.htm | 9055 | 2024-02-16 07:44:09 |
| R69.htm | 9187 | 2024-02-16 07:44:09 |
| R7.htm | 45047 | 2024-02-16 07:44:09 |
| R70.htm | 8610 | 2024-02-16 07:44:09 |
| R71.htm | 21852 | 2024-02-16 07:44:09 |
| R72.htm | 8833 | 2024-02-16 07:44:09 |
| R73.htm | 16255 | 2024-02-16 07:44:09 |
| R74.htm | 13708 | 2024-02-16 07:44:09 |
| R75.htm | 15732 | 2024-02-16 07:44:09 |
| R76.htm | 36544 | 2024-02-16 07:44:09 |
| R77.htm | 19447 | 2024-02-16 07:44:09 |
| R78.htm | 35865 | 2024-02-16 07:44:09 |
| R79.htm | 31735 | 2024-02-16 07:44:09 |
| R8.htm | 43746 | 2024-02-16 07:44:09 |
| R80.htm | 86789 | 2024-02-16 07:44:09 |
| R81.htm | 6218 | 2024-02-16 07:44:09 |
| R82.htm | 59269 | 2024-02-16 07:44:09 |
| R83.htm | 9425 | 2024-02-16 07:44:09 |
| R84.htm | 8909 | 2024-02-16 07:44:09 |
| R85.htm | 23432 | 2024-02-16 07:44:09 |
| R86.htm | 10979 | 2024-02-16 07:44:09 |
| R87.htm | 44526 | 2024-02-16 07:44:09 |
| R88.htm | 68728 | 2024-02-16 07:44:09 |
| R89.htm | 12211 | 2024-02-16 07:44:09 |
| R9.htm | 50507 | 2024-02-16 07:44:09 |
| R90.htm | 17728 | 2024-02-16 07:44:09 |
| R91.htm | 27412 | 2024-02-16 07:44:09 |
| R92.htm | 24763 | 2024-02-16 07:44:09 |
| R93.htm | 17736 | 2024-02-16 07:44:09 |
| report.css | 2768 | 2024-02-16 07:44:09 |
| Show.js | 1086 | 2024-02-16 07:44:09 |
| usm-20231231.htm | 2141406 | 2024-02-16 07:44:09 |
| usm-20231231.xsd | 75123 | 2024-02-16 07:44:09 |
| usm-20231231_cal.xml | 113261 | 2024-02-16 07:44:09 |
| usm-20231231_def.xml | 545642 | 2024-02-16 07:44:09 |
 usm-20231231_g1.jpg | 9481 | 2024-02-16 07:44:09 |
 usm-20231231_g2.jpg | 164983 | 2024-02-16 07:44:09 |
 usm-20231231_g3.jpg | 371313 | 2024-02-16 07:44:09 |
 usm-20231231_g4.jpg | 34379 | 2024-02-16 07:44:09 |
 usm-20231231_g5.jpg | 56120 | 2024-02-16 07:44:09 |
 usm-20231231_g6.jpg | 24552 | 2024-02-16 07:44:09 |
 usm-20231231_g7.jpg | 26675 | 2024-02-16 07:44:09 |
| usm-20231231_htm.xml | 1707535 | 2024-02-16 07:44:09 |
| usm-20231231_lab.xml | 1062679 | 2024-02-16 07:44:09 |
| usm-20231231_pre.xml | 781645 | 2024-02-16 07:44:09 |
| usm202310-kexhibit21.htm | 56631 | 2024-02-16 07:44:09 |
| usm202310-kexhibit23.htm | 2370 | 2024-02-16 07:44:09 |
| usm202310-kexhibit311.htm | 11201 | 2024-02-16 07:44:09 |
| usm202310-kexhibit312.htm | 11200 | 2024-02-16 07:44:09 |
| usm202310-kexhibit321.htm | 5278 | 2024-02-16 07:44:09 |
| usm202310-kexhibit322.htm | 5278 | 2024-02-16 07:44:09 |
| usm202310-kexhibit411.htm | 55982 | 2024-02-16 07:44:09 |
| usm202310-kexhibit97.htm | 23621 | 2024-02-16 07:44:09 |