Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000068622-20-000009-index-headers.html | 2020-08-07 16:33:18 | |
| 0000068622-20-000009-index.html | 2020-08-07 16:33:18 | |
| 0000068622-20-000009.txt | 2020-08-07 16:33:18 | |
 0000068622-20-000009-xbrl.zip | 200415 | 2020-08-07 16:33:18 |
| ctl-20200630.htm | 1235746 | 2020-08-07 16:33:18 |
| ctl-20200630.xsd | 33356 | 2020-08-07 16:33:18 |
| ctl-20200630_cal.xml | 69072 | 2020-08-07 16:33:18 |
| ctl-20200630_def.xml | 180647 | 2020-08-07 16:33:18 |
| ctl-20200630_htm.xml | 840439 | 2020-08-07 16:33:18 |
| ctl-20200630_lab.xml | 427209 | 2020-08-07 16:33:18 |
| ctl-20200630_pre.xml | 277533 | 2020-08-07 16:33:18 |
| FilingSummary.xml | 29718 | 2020-08-07 16:33:18 |
| Financial_Report.xlsx | 65917 | 2020-08-07 16:33:18 |
| MetaLinks.json | 467546 | 2020-08-07 16:33:18 |
| qc2020063010qex311.htm | 11167 | 2020-08-07 16:33:18 |
| qc2020063010qex312.htm | 11278 | 2020-08-07 16:33:18 |
| qc2020063010qex321.htm | 6261 | 2020-08-07 16:33:18 |
| qc2020063010qex322.htm | 6318 | 2020-08-07 16:33:18 |
| R1.htm | 67009 | 2020-08-07 16:33:18 |
| R10.htm | 26245 | 2020-08-07 16:33:18 |
| R11.htm | 81044 | 2020-08-07 16:33:18 |
| R12.htm | 29570 | 2020-08-07 16:33:18 |
| R13.htm | 50644 | 2020-08-07 16:33:18 |
| R14.htm | 22101 | 2020-08-07 16:33:18 |
| R15.htm | 41534 | 2020-08-07 16:33:18 |
| R16.htm | 21233 | 2020-08-07 16:33:18 |
| R17.htm | 5954 | 2020-08-07 16:33:18 |
| R18.htm | 14306 | 2020-08-07 16:33:18 |
| R19.htm | 5374 | 2020-08-07 16:33:18 |
| R2.htm | 52367 | 2020-08-07 16:33:18 |
| R20.htm | 20350 | 2020-08-07 16:33:18 |
| R21.htm | 23337 | 2020-08-07 16:33:18 |
| R22.htm | 75313 | 2020-08-07 16:33:18 |
| R23.htm | 22478 | 2020-08-07 16:33:18 |
| R24.htm | 47333 | 2020-08-07 16:33:18 |
| R25.htm | 15878 | 2020-08-07 16:33:18 |
| R26.htm | 32329 | 2020-08-07 16:33:18 |
| R27.htm | 13929 | 2020-08-07 16:33:18 |
| R28.htm | 47449 | 2020-08-07 16:33:18 |
| R29.htm | 14136 | 2020-08-07 16:33:18 |
| R3.htm | 88251 | 2020-08-07 16:33:18 |
| R30.htm | 9533 | 2020-08-07 16:33:18 |
| R31.htm | 12971 | 2020-08-07 16:33:18 |
| R32.htm | 15747 | 2020-08-07 16:33:18 |
| R33.htm | 13589 | 2020-08-07 16:33:18 |
| R34.htm | 17037 | 2020-08-07 16:33:18 |
| R35.htm | 11834 | 2020-08-07 16:33:18 |
| R36.htm | 13896 | 2020-08-07 16:33:18 |
| R37.htm | 19848 | 2020-08-07 16:33:18 |
| R38.htm | 42388 | 2020-08-07 16:33:18 |
| R39.htm | 19735 | 2020-08-07 16:33:18 |
| R4.htm | 11814 | 2020-08-07 16:33:18 |
| R40.htm | 43825 | 2020-08-07 16:33:18 |
| R41.htm | 10092 | 2020-08-07 16:33:18 |
| R42.htm | 4102 | 2020-08-07 16:33:18 |
| R43.htm | 21963 | 2020-08-07 16:33:18 |
| R44.htm | 18217 | 2020-08-07 16:33:18 |
| R45.htm | 4360 | 2020-08-07 16:33:18 |
| R46.htm | 13347 | 2020-08-07 16:33:18 |
| R47.htm | 8127 | 2020-08-07 16:33:18 |
| R5.htm | 76537 | 2020-08-07 16:33:18 |
| R6.htm | 4660 | 2020-08-07 16:33:18 |
| R7.htm | 23481 | 2020-08-07 16:33:18 |
| R8.htm | 3985 | 2020-08-07 16:33:18 |
| R9.htm | 20262 | 2020-08-07 16:33:18 |
| R9999.htm | 4197 | 2020-08-07 16:33:18 |
| report.css | 2767 | 2020-08-07 16:33:18 |
| Show.js | 1085 | 2020-08-07 16:33:18 |