Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-208185-index-headers.html | 2020-08-03 17:04:20 | |
| 0001193125-20-208185-index.html | 2020-08-03 17:04:20 | |
| 0001193125-20-208185.txt | 2020-08-03 17:04:20 | |
 0001193125-20-208185-xbrl.zip | 7733 | 2020-08-03 17:04:20 |
| btu-20200715.xsd | 3080 | 2020-08-03 17:04:20 |
| btu-20200715_lab.xml | 17372 | 2020-08-03 17:04:20 |
| btu-20200715_pre.xml | 10960 | 2020-08-03 17:04:20 |
| d17643d8ka.htm | 22364 | 2020-08-03 17:04:20 |
| d17643d8ka_htm.xml | 3277 | 2020-08-03 17:04:20 |
| FilingSummary.xml | 1696 | 2020-08-03 17:04:20 |
| Financial_Report.xlsx | 5461 | 2020-08-03 17:04:20 |
| MetaLinks.json | 18358 | 2020-08-03 17:04:20 |
| R1.htm | 38621 | 2020-08-03 17:04:20 |
| report.css | 2766 | 2020-08-03 17:04:20 |
| Show.js | 1084 | 2020-08-03 17:04:20 |