Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-164728-index-headers.html | 2020-06-09 16:50:03 | |
| 0001193125-20-164728-index.html | 2020-06-09 16:50:03 | |
| 0001193125-20-164728.txt | 2020-06-09 16:50:03 | |
 0001193125-20-164728-xbrl.zip | 7948 | 2020-06-09 16:50:03 |
| btu-20200603.xsd | 3080 | 2020-06-09 16:50:03 |
| btu-20200603_lab.xml | 17372 | 2020-06-09 16:50:03 |
| btu-20200603_pre.xml | 10960 | 2020-06-09 16:50:03 |
| d911542d8k.htm | 24779 | 2020-06-09 16:50:03 |
| d911542d8k_htm.xml | 3276 | 2020-06-09 16:50:03 |
| FilingSummary.xml | 1694 | 2020-06-09 16:50:03 |
| Financial_Report.xlsx | 5789 | 2020-06-09 16:50:03 |
| MetaLinks.json | 18360 | 2020-06-09 16:50:03 |
| R1.htm | 38617 | 2020-06-09 16:50:03 |
| report.css | 2766 | 2020-06-09 16:50:03 |
| Show.js | 1084 | 2020-06-09 16:50:03 |