Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-26-280299-index-headers.html | 2026-06-24 08:25:48 | |
| 0001193125-26-280299-index.html | 2026-06-24 08:25:48 | |
| 0001193125-26-280299.txt | 2026-06-24 08:25:48 | |
 0001193125-26-280299-xbrl.zip | 6332 | 2026-06-24 08:25:48 |
| cik0000773757-20260624.xsd | 36434 | 2026-06-24 08:25:48 |
| d99217d497.htm | 20987 | 2026-06-24 08:25:48 |
| d99217d497_htm.xml | 17728 | 2026-06-24 08:25:48 |
| FilingSummary.xml | 2185 | 2026-06-24 08:25:48 |
| MetaLinks.json | 109727 | 2026-06-24 08:25:48 |
| R1.htm | 13994 | 2026-06-24 08:25:48 |
| R2.htm | 19176 | 2026-06-24 08:25:48 |
| report.css | 2766 | 2026-06-24 08:25:48 |
| Show.js | 1084 | 2026-06-24 08:25:48 |