Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-263313-index-headers.html | 2020-10-05 08:01:33 | |
| 0001193125-20-263313-index.html | 2020-10-05 08:01:33 | |
| 0001193125-20-263313.txt | 2020-10-05 08:01:33 | |
 0001193125-20-263313-xbrl.zip | 9231 | 2020-10-05 08:01:33 |
| btu-20201005.xsd | 3081 | 2020-10-05 08:01:33 |
| btu-20201005_lab.xml | 17373 | 2020-10-05 08:01:33 |
| btu-20201005_pre.xml | 10961 | 2020-10-05 08:01:33 |
| d50419d8k.htm | 27079 | 2020-10-05 08:01:33 |
| d50419d8k_htm.xml | 3276 | 2020-10-05 08:01:33 |
| FilingSummary.xml | 1691 | 2020-10-05 08:01:33 |
| Financial_Report.xlsx | 5457 | 2020-10-05 08:01:33 |
| MetaLinks.json | 18354 | 2020-10-05 08:01:33 |
| R1.htm | 38621 | 2020-10-05 08:01:33 |
| report.css | 2766 | 2020-10-05 08:01:33 |
| Show.js | 1084 | 2020-10-05 08:01:33 |