Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-19-312868-index-headers.html | 2019-12-12 17:21:03 | |
| 0001193125-19-312868-index.html | 2019-12-12 17:21:03 | |
| 0001193125-19-312868.txt | 2019-12-12 17:21:03 | |
 0001193125-19-312868-xbrl.zip | 7844 | 2019-12-12 17:21:03 |
| btu-20191208.xsd | 3083 | 2019-12-12 17:21:03 |
| btu-20191208_lab.xml | 17375 | 2019-12-12 17:21:03 |
| btu-20191208_pre.xml | 10963 | 2019-12-12 17:21:03 |
| d837534d8k.htm | 23916 | 2019-12-12 17:21:03 |
| d837534d8k_htm.xml | 3276 | 2019-12-12 17:21:03 |
| FilingSummary.xml | 1699 | 2019-12-12 17:21:03 |
| Financial_Report.xlsx | 5787 | 2019-12-12 17:21:03 |
| MetaLinks.json | 18330 | 2019-12-12 17:21:03 |
| R1.htm | 38621 | 2019-12-12 17:21:03 |
| report.css | 2767 | 2019-12-12 17:21:03 |
| Show.js | 1085 | 2019-12-12 17:21:03 |