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|---|---|---|
 0001193125-20-213720-index-headers.html | 2020-08-07 20:52:38 | |
| 0001193125-20-213720-index.html | 2020-08-07 20:52:38 | |
| 0001193125-20-213720.txt | 2020-08-07 20:52:38 | |
 0001193125-20-213720-xbrl.zip | 21783 | 2020-08-07 20:52:38 |
| ctl-20200807.xsd | 6966 | 2020-08-07 20:52:38 |
| ctl-20200807_cal.xml | 679 | 2020-08-07 20:52:38 |
| ctl-20200807_def.xml | 18000 | 2020-08-07 20:52:38 |
| ctl-20200807_lab.xml | 26562 | 2020-08-07 20:52:38 |
| ctl-20200807_pre.xml | 18664 | 2020-08-07 20:52:38 |
| d78337d8k.htm | 97616 | 2020-08-07 20:52:38 |
| d78337d8k_htm.xml | 16465 | 2020-08-07 20:52:38 |
| d78337dex991.htm | 8909 | 2020-08-07 20:52:38 |
| d78337dex992.htm | 9925 | 2020-08-07 20:52:38 |
| FilingSummary.xml | 1812 | 2020-08-07 20:52:38 |
| Financial_Report.xlsx | 6375 | 2020-08-07 20:52:38 |
 g7833710.jpg | 47337 | 2020-08-07 20:52:38 |
 g78337g0807070011413.jpg | 32927 | 2020-08-07 20:52:38 |
| MetaLinks.json | 26695 | 2020-08-07 20:52:38 |
| R1.htm | 69111 | 2020-08-07 20:52:38 |
| report.css | 2767 | 2020-08-07 20:52:38 |
| Show.js | 1085 | 2020-08-07 20:52:38 |